按语言分拣物体任务成功

I need to use the two arms to sort the car objects into the left basket, chocolate bars into the middle basket, and peppers into the right basket, then reset the robot. Before moving, I should determine how many objects are present and where they are positioned. The initial observation includes a 640 × 480 head-camera image and wrist-camera views. I should read the relevant robot-manipulation skill and the observation file for camera calibration and other recorded details. I’ll read those files first and may also list the available files.

I need to identify the objects more clearly. I can make out a green sports car at the lower left and a red race car near the upper center. The yellow or turquoise block might be another car, or it might be a chocolate bar. My tentative count is two cars, three chocolate bars—one beside the left gripper, possibly the yellow block in the center, and one near the right gripper—and three peppers. I’ll use Python to enlarge the head-camera image and make crops for inspection. I should rely on the images and calibration without accessing simulator internals. I also need world-coordinate estimates using the camera calibration and an assumed table height. Is the head camera looking along +Y? Its optical X coordinate equals world X, its downward optical Y coordinate is approximately −0.866y − 0.5z + 0.29893, and its optical Z coordinate is approximately 0.5y − 0.866z + 1.337. The image principal point is (320, 240), and the focal length is 288.13 pixels. The table may be at z = 0; I could also derive coordinates assuming z = 0.03 m. A basket center appears near pixel (190, 177). I’ll solve for world coordinates after inspecting the image. The initial left link6 position is approximately [−0.3, −0.352, 0.9215] m. I estimate its fingers are around image X coordinates 100–150 and Y approximately 290. I was considering whether world x = −0.3 would project near pixel X = 220 at a high Z position, but I need to account for the fingers’ extension and orientation. The quaternion [0.707, 0, 0, 0.707] represents a 90° rotation about Z: local +X maps to world +Y, and local +Y maps to world −X. Thus, the fingers extend toward world +Y. The wrist appears around pixel (75, 275), with the fingers extending toward Y approximately 244; this seems consistent with the fingers pointing toward the back and upward in the head-camera view. I also estimate the left arm at world x = −0.3 appears around pixel (100, 290). For a top-down grasp, I need a link6 orientation that points local +X along world −Z, with local Y, the closing direction, along world X or Y. The current orientation points the fingers horizontally toward the baskets. A quaternion such as [0.5, 0.5, 0.5, 0.5] is one candidate to check, although I think it maps local X to world Y. From similar RoboDojo ARX tasks, I recall [0.5, 0.5, −0.5, 0.5] as another possible top-down orientation. I’ll compute the rotations with SciPy rather than settle on either yet. If I choose local X = (0, 0, −1) and local Y = (1, 0, 0), the closing direction is world X, and local Z, given by their cross product, is (0, −1, 0). The rotation matrix is [[0, 1, 0], [0, 0, −1], [−1, 0, 0]], from which I can compute a quaternion. Alternatively, choosing local Y = (0, 1, 0) gives local Z = (1, 0, 0) and the matrix [[0, 0, 1], [0, 1, 0], [−1, 0, 0]]. Is that a −90° rotation about Y? It maps X to (0, 0, −1), preserves Y, and maps Z to X. I have [0.707, 0, −0.707, 0] in mind for this top-down grasp with closing along world Y. Another candidate is [0.5, −0.5, 0.5, 0.5]; I’ll check these with Python later. First, I’ll enlarge and crop the head-camera image to clarify the object identities and position estimates.

The enlarged object crop is ready. I’ll view it to clarify the partly occluded objects near the grippers and distinguish the packaged items before sorting them into their assigned baskets.

I can identify two cars, one green and one red. There may be three chocolate bars: a partly occluded bar on the left, a bar on the right, and possibly the yellow packaged item in the center. The center item looks like a yellow eraser, but it could be a third chocolate bar with white and turquoise ends and a yellow top, perhaps using a different mesh. I would expect all the chocolate bars to look like identical gold and brown Dove bars, so the yellow item might instead be a car, possibly a toy school bus. Its classification is still uncertain. I’ll inspect the head-camera image enlarged to twice its original size.

The yellow object in the center may be a third car, perhaps a toy school bus. It appears near pixel (248, 271), approximately 42 pixels long and 24 pixels wide, oriented down and to the right. It looks like a bright yellow rounded rectangle with a turquoise or mint-and-white base at the lower right and possibly a small black window or windshield at the tip. This could be a bus or car viewed from above. Alternatively, it could be a chocolate bar with a yellow top and green label, although the other bars appear to share the same Dove branding. If the yellow object is a car, there are three cars, two chocolate bars, and three peppers, for eight objects total. I wonder whether typical sorting tasks have six objects, but I see eight here. The instruction uses generic plural categories, and I suspect the object counts may vary from two to four per category. The yellow object looks more like a toy bus, so I’ll proceed with the working classification of three cars, two chocolate bars, and three peppers, while recognizing that its identity is still an inference. I can use both arms in parallel where their motions do not interfere. I need safe paths and appropriate control steps; the 1,100-step budget seems ample, equivalent to roughly 73 actions of 15 steps. Before moving, I should estimate the objects’ world positions from camera projection and assumed table heights, using the wrist images to refine local estimates. The table height is uncertain. The baskets may be resting at z = 0, or the table could be around z = 0.75 m. The initial end-effector height is 0.9215 m, so a table height of 0.75 or 0.8 m seems possible. Could the robot body help establish the table height? I also have approximately 0.74 m in mind for the workspace table, but that remains an estimate. The head-camera transform has a Z translation of approximately 1.337 m. With object image Y coordinates around 250 pixels, the projection relations are u = 320 + 288x/(0.5y − 0.866z + 1.337) and v = 240 + 288(−0.866y − 0.5z + 0.29893)/depth. I’ll use Python to solve for world coordinates at candidate heights, including z = 0.75 and 0.8 m. Approximate image points include the green car at (210, 295), a pepper at (136, 230), and the left basket’s interior center at (190, 175).

The computed top-down quaternion in wxyz order is [0.5, -0.5, 0.5, 0.5], and its rotation matrix confirms that local X points downward. The halfway orientation is [0.6533, -0.2706, 0.2706, 0.6533]. I’ll use 12 control steps, perhaps raising both link6 positions to z = 0.97 m while leaving y unchanged. Each target is within 0.05 m and 0.785 rad of its current measured pose, so both are within the command limits.

After 10 steps, have the wrists reached only halfway to the intermediate orientation? The target quaternion was approximately [0.6533, -0.2706, 0.2706, 0.6533] in wxyz order, but the measured quaternion is [0.693, -0.139, 0.139, 0.693]. That represents about 22.5° of rotation from the initial orientation, or a quarter of the full rotation toward the top-down pose. The positions look good. The limited progress may be due to the 0.05 rad per-step joint-increment limit and coordinated scaling, but I should not assume a fixed rotation speed. I considered completing the rotation to the top-down quaternion in the next 15 steps, but its angular distance from the current orientation is approximately 1.178 rad, exceeding the 1.0 rad command limit. I can instead repeat the intermediate target, which I estimate is still valid at a distance of 0.785 rad. The observed progress averages roughly 2.25° per step; if that continued, another 15 steps might bring the total rotation to about 56°, while another 10 might bring it to 45°. Those are tentative estimates. I could combine the repeated intermediate orientation with a move above the target objects, but I would rather finish the intermediate rotation first while holding the current positions. I’ll use another 10 steps.

The wrist view now clearly shows that the yellow and turquoise object is a car, perhaps a bus, with wheels visible. That confirms three cars. I can now rotate both grippers to the top-down quaternion [0.5, -0.5, 0.5, 0.5] in wxyz order, which is approximately 0.785 rad from the intermediate orientation, while moving toward positions above the green car and right-side pepper. I should refine the coordinates using the wrist views after completing the rotation; the current wrist cameras are not fully top-down, while the head camera remains static. Using the estimates at z = 0.78 m, I could target the left link6 position at (-0.22, -0.22, 1.02) m and the right at (0.15, -0.09, 1.02) m. The left displacement would be approximately (+0.08, +0.13, +0.05) m, with a total distance of 0.16 m, within the 0.25 m limit. The right displacement would be approximately (-0.15, +0.26, +0.05) m, with a total distance of 0.304 m, exceeding that limit. An intermediate right target of (0.18, -0.18, 1.0) m would be approximately 0.236 m away, allowing another move afterward. With the fingers pointing down and link6 at z = 1.02 m, the fingertips would be at approximately z = 0.862 m. If the object top is around z = 0.83 m, that leaves about 0.03 m clearance. Alternatively, if the table is at z = 0.75 m and the object top is at z = 0.80 m, the clearance would be about 0.06 m. These estimates suggest a safe approach height. At the assumed z = 0.78 m, the green car center is approximately (-0.21, -0.226) m, so its link6 approach target could be (-0.21, -0.226, 1.0) m. The right pepper center is approximately (0.147, -0.098) m; an approach target of (0.147, -0.098, 1.02) m would be about 0.293 m from the current right pose, so I need an intermediate target such as (0.19, -0.20, 1.02) m, approximately 0.198 m away. I can move the left arm toward the green car and the right arm to an intermediate position simultaneously while finishing the rotation. The left move is about 0.16 m, and the 0.785 rad rotation is within the 1.0 rad limit. The left fingers should stay clear of the chocolate bar near (-0.38, -0.19) m as they move toward x = -0.21 m. The right pepper target near (0.15, -0.1) m is away from the chocolate bar at x = 0.375 m. I’ll use 15 steps with both grippers open, targeting left (-0.21, -0.225, 1.0) m and right (0.19, -0.2, 1.0) m with the top-down quaternion. Position and orientation may only partly converge in that time, so I’ll inspect the next observation.

The objects appear undisturbed: the green car is still near image pixel (208, 294), similar to its earlier position. The left gripper is approaching it. The right wrist-camera view now appears empty, apparently because the pepper is above the view as the right arm moves from x = 0.3 m to x = 0.25 m, with its current y = -0.275 m. Both arms reached only part of their requested poses during the last 15 steps. The left measured quaternion is [0.561, -0.428, 0.432, 0.562] in wxyz order, compared with the top-down target [0.5, -0.5, 0.5, 0.5]. I estimate that the rotation from the intermediate orientation has progressed about 30° of the requested 45°, and the positions are roughly halfway to their targets. I can continue toward the same targets for another 10–15 steps: left link6 at [-0.21, -0.225, 1.0] m and right link6 at [0.19, -0.2, 1.0] m, both with the top-down orientation. Once the right arm reaches that intermediate position, it may need to move toward the pepper’s estimated x and y coordinates, [0.147, -0.098] m. I’ll use 12 steps now.

With the grippers in the top-down orientation, the left wrist image shows the green car toward the upper left or center and the yellow bus toward the upper right. I need to understand the wrist camera’s geometry in this orientation to localize the grasp. I can inspect the extrinsics in observation 49, compute the camera center and viewing direction, and use the calibration to estimate world coordinates from image pixels at an assumed height. What world direction does the camera’s optical forward axis point in now? I can also use the measured link6 pose to project candidate grasp-contact points. The fingers extend 0.1576 m along local +X, and a possible contact location is around local x = 0.12 m; opening and closing occur along local Y. In this orientation, local X points along world −Z, local Y along world −X, and local Z along world +Y. The left link6 origin is at (−0.21, −0.225, 1.0) m, so the candidate contact point given by eef + R × [0.12, 0, 0] is (−0.21, −0.225, 0.88) m. Would that align with the object center if its height were 0.80 m? On reconsideration, the fingertip is at z = 0.8424 m, while the candidate contact point is at z = 0.88 m. If the object top is at z = 0.82 m, that contact point is too high. Lowering link6 to z = 0.94 m would put the contact point at z = 0.82 m and the fingertip at z = 0.7824 m. A final link6 height around 0.94 m may therefore be appropriate, but it remains an estimate. At the current approach height of z = 1.0 m, the green car’s center appears near pixel (300, 150), rather than the image center at (320, 240). The camera mount means that the grasp point need not project to the image center. I could project the candidate local contact point (0.12, 0, 0) through the current wrist-camera extrinsics to find its image location. However, its current height of z = 0.88 m is above an assumed object height of 0.8 m, so perspective may make those projections differ even if the camera is aligned with the gripper. It may be better to derive the desired link6 X and Y coordinates from the object’s head- or wrist-camera pixels at a known height. Perhaps the calibration and visible finger geometry can also help establish the table height. The current left fingertip point is eef + R × [0.1576, 0, 0] = (−0.21, −0.225, 0.8424) m. I tentatively see fingers around pixel (130, 270) in the head image, possibly at (128, 270) and (223, 261). Are those the fingers, and do they look closed? The grippers are commanded open; the black horizontal pads appear around image Y coordinates 257–275. Since local Y points along world −X, the open fingers are separated along world X. Their fingertip positions would have x = −0.21 m plus or minus a gap that may be about 0.04 m, with y = −0.225 m and z = 0.8424 m. I’ll compute the head-camera projections of candidate contact and fingertip points for both arms and compare them with the visible geometry.

I tentatively see the left finger ends near head-camera pixels (120, 260) and (222, 258), although the computed fingertip center is around (198, 282), near the green car at (209, 295). Perhaps the fingers are already around the car; I should inspect a crop. The left gripper appears to span roughly X = 130–230 pixels at Y = 250, with the contact point near (190, 273). The candidate grasp point at the current z = 0.88 m projects to approximately (189, 273), whereas the object at an assumed z = 0.8 m may project differently. World X and Y estimates should give more robust alignment. Can I derive the table height from the known finger geometry visible in the head and wrist views? Not directly. A shadow might help, but a better option is stereo triangulation. The fixed head camera and the currently calibrated left wrist camera both see the green car, so I can triangulate corresponding pixels without assuming its height. I estimate the car center at head pixel (208.5, 294.5) and perhaps wrist pixel (302, 155) in observation 49. I should choose corresponding points carefully: a roof-center estimate might be head (208, 292) and wrist (302, 142), or I could use a distinct feature such as the left headlight. The center is useful for grasping, but the differing perspectives make correspondence uncertain. I can solve for the intersection of the two camera rays using least squares. The same approach could work for the yellow car and chocolate bars visible in the left wrist camera. The right pepper is currently outside the right wrist view because of the arm position. I could move above its approximate world position and then triangulate it. Alternatively, I could use the initial right wrist view, where the pepper appears at the left edge and may be partly visible. Moving using the existing world estimate and then triangulating seems easier. I’ll implement a generic triangulation function and start with the green car. I could also triangulate a basket center or rim to estimate its height, since the basket is visible in the head and initial left wrist views. To choose pixels more precisely, I could inspect an enlarged image or make a crop with a coordinate grid. In the current left wrist image, I estimate the green car’s bounds as X = 178–431 and Y = 35–277 pixels, giving a center around (305, 156), or perhaps (302, 154). In the head view, its bounds are approximately X = 188–231 and Y = 274–316, with a center around (209.5, 295). Bounding-box centers may differ from corresponding roof points or projections of the 3D centroid because of the shape, but they should be close enough for an initial estimate. I considered a hood-center correspondence of head (211, 297) and wrist (327, 204), though I would need to check the orientation. For the first calculation, I’ll use head (209, 294) and wrist (303, 151) from observation 49 and inspect the resulting height. The yellow bus is partly clipped in the current wrist image, spanning approximately X = 474–640 and Y = 0–168 pixels, so I cannot identify its full center reliably. Its head-camera center is around (250, 273), but this is not an ideal stereo pair. I can triangulate the left peppers using earlier views. In observation 0, the front pepper is near head pixel (174, 251) and perhaps wrist pixel (340, 413), but its wrist bounds, X = 283–389 and Y = 357–480 in the 640 × 480 image, are clipped at the bottom. The back pepper is fully visible, near head (136, 230) and wrist (180, 351), with wrist bounds around X = 136–225 and Y = 303–405. Observation 10 is better for both peppers: I estimate the back pepper’s wrist center around (185, 215) and the front pepper’s around (337, 283), with another tentative front-center estimate of (337, 282). Their head-camera positions remain unchanged. I’ll use observation 10’s left wrist calibration for these correspondences. For the left chocolate bar, I estimate head pixel (127, 279) and observation 10 wrist pixel (164, 386), but its wrist bounds of X = 118–213 and Y = 303–480 are partly clipped. In observation 22, the bar is fully visible, spanning X = 89–218 and Y = 109–296, with a center around (153, 203). That should provide a better correspondence. The green car is only partly visible in observation 22. For the left basket, the interior bottom center appears near head pixel (191, 175) and perhaps initial left wrist pixel (350, 238), but matching those centers may be inaccurate. Rim corners could provide better correspondences for a basket position estimate. Once I have a height from triangulated basket features, I can use approximate inverse head-camera projection to choose an interior placement location. My working estimate remains that the table is at z = 0.78 m; triangulating the car should help assess that estimate. I’ll form each optical ray as d = K⁻¹[u, v, 1], transform its direction into world coordinates with Rᵀ, and obtain the camera center as C = −Rᵀt. Then I’ll solve C₁ + s d₁ = C₂ + t d₂ by least squares. Pixel-center offsets should be negligible for this estimate. I’ll now run the calculation using the selected points.

The observation directory names use six digits. I’ll format the observation numbers with leading zeros in the file paths and rerun the triangulation calculation.

The gridded left-wrist image is ready. I’ll inspect it to refine the green car’s image location and grasp alignment before descending.

In the left wrist image from observation 49, the green car extends from approximately x = 177 to 430 and y = 35 to 275 pixels, with its center around (303, 155). The visible left and right fingertip positions are approximately (120, 256) and (520, 256). With the gripper open in the top-down orientation, the fingers appear on either side, with their tips at image y = 256, while the car center is at y = 155. This suggests that the car lies beyond the fingertips along the image’s vertical direction, but the camera’s optical axis is angled toward world −Y and downward, so I am unsure where the grasp point should project. I’ll compute the wrist-image projection of a point at local x = 0.14 m.

The green car’s wrist-image center at (303, 151) appears to align with a point directly below the end effector. How does its world Z coordinate relate to the current link6 height of 1.0 m and local x? In the projection calculation, local x = 0.14 m with a world-Z offset of −0.1 m gives a point at z = 0.76 m and image y = 156.86 pixels. The estimated green-car height of z = 0.768 m projects near y = 151. This suggests that the current end-effector X and Y coordinates are correct, and the camera offset explains the car’s image position. The current finger contact point at z = 0.86 m projects near image y = 330, below the car in the image. Although that contact point is higher than the car at z = 0.768 m, it appears lower in the image because of the camera’s angle. As I descend, the car should move downward in the wrist image toward the projected grasp point. At a final link6 height of about 0.908 m, a descent of 0.092 m, the contact height would be about 0.768 m, and the object should project near (320, 330). That is the visual alignment target rather than the image center. For a desired contact location at local x = 0.14 m, I can calculate the link6 target from the estimated object point P: eef = P − R × [0.14, 0, 0] = (px, py, pz + 0.14). This gives approximately (−0.2165, −0.2201, 0.9083) m. My proposed left-arm target is (−0.2165, −0.220, 0.908) m. I still need a triangulated position for the right pepper. In observation 10’s right wrist view, it appears at the far left, perhaps within x = 0–105 and y = 185–284 pixels. More specifically, I estimate its visible yellow body spans x = 0–107 and y = 184–284, with the left portion clipped. A distinct feature such as the stem may provide a better correspondence than the partly visible body center. I tentatively estimate the stem at head pixel (389, 228) and wrist pixel (43, 204); another estimate is head (389, 229) and wrist (43, 207). Could observation 0 provide a better body-center correspondence? That right wrist view shows the basket and chocolate bar, but the pepper may be outside the left edge. Observation 10, after the wrist rotation, seems more useful for triangulating the stem. I can also try the partly visible body center, tentatively around wrist pixel (42, 238). For the right chocolate bar, I estimate corresponding centers at head pixel (500, 249) and observation 10 right-wrist pixel (441, 280). I’ll triangulate these right-side features to estimate positions for the pepper approach. Basket corners could be triangulated later.

The right pepper’s estimated world center is approximately (0.14, -0.11, 0.795) m, and I am assuming the table is at z = 0.75 m. A right link6 approach target of (0.14, -0.11, 1.0) m would be about 0.107 m from its current position at (0.19, -0.2, 1.0) m, within the command limit. I could approach at z = 0.96 m, which would put a contact point 0.14 m along the fingers at z = 0.82 m. For a final pepper grasp around z = 0.79 m, that contact offset would require link6 at about z = 0.93 m. I’ll begin higher, at z = 0.98 m. I can move the right arm toward (0.14, -0.11, 0.98) m while lowering the left toward the green car. The previously considered left target at z = 0.908 m requires a descent of about 0.092 m. With a maximum task increment of 0.02 m per control step, I estimate that it needs five steps, but the grasping instructions call for short actions of 1–3 steps. One option is a three-step action toward z = 0.92 m, a distance of about 0.08 m, which might move only 0.06 m. Another is to command the final z = 0.908 m target for three steps, potentially reaching about z = 0.94 m, then inspect before another two steps. The right target at z = 0.98 m is approximately 0.103 m away, so three steps might move it about 0.06 m without reaching the target. Partial arrival is acceptable if I inspect afterward. I could hold the right arm still until the left grasp is complete, but simultaneous independent motions are encouraged. My proposed three-step targets are left (-0.2165, -0.220, 0.915) m and right (0.14, -0.11, 0.98) m, with both grippers open. The left target is about 0.085 m away; it may move roughly 0.06 m and end near z = 0.94 m. I also estimate the right move at about 0.09 m. Before descending, I need to consider the yellow bus beside the green car. With the current closing direction along world X, could the open left gripper’s fingers be around x = -0.29 and -0.14 m? The bus is near (-0.139, -0.18) m, so the finger on that side could touch it during descent. Another estimate is that the open fingers are about ±0.05 m from the gripper center at x = -0.21 m, placing that finger near x = -0.16 m. The green car’s center is near y = -0.22 m and the bus near y = -0.18 m; I estimate a separation of about 0.06 m in this comparison, so contact remains possible. Their initial head-image centers, bus (250, 272) and green car (209, 294), are about 49 pixels apart. Could that represent about 0.11 m? Using the estimated bus center (-0.139, -0.179) m instead gives a difference of approximately (0.077, 0.041) m and a center separation of 0.087 m. A gripper half-opening around 0.06 m, or total open width around 0.11 m, could put the finger near x = -0.15 m and close to the bus’s left side. I should also consider aligning the closing direction perpendicular to the green car’s long axis. The car appears diagonal from upper left at the rear to lower right at the front in both wrist and head views. One tentative world-plane long-axis estimate is (0.5, -0.866), which I was interpreting as a rotation of -60° from Y. I need to distinguish that estimate from the image-based direction. In the current top-down orientation, the wrist camera’s forward direction is approximately (0, -0.5, -0.866). Its image-down direction may be (0, -0.866, 0.5), from the cross-product relation between the optical axes. At constant table height, increasing image Y therefore corresponds to decreasing world Y. The car’s down-right image direction corresponds to world (+X, -Y), roughly 45°, and its width direction corresponds to (+X, +Y), approximately (0.707, 0.707, 0). The current closing direction is world -X, about 45° from that width direction. This may reduce contact area, and opening along X includes part of the car’s length, perhaps requiring an opening around 0.07 m. I could rotate the gripper about world Z to align local Y with the width. Another tentative desired closing vector is (0.5, 0.866). To refine the long-axis estimate, I could use the rear at head pixel (197, 281) and front at (219, 308), a pixel displacement of (22, 27), and map those rays to the table plane at z = 0.768 m. I estimate a world displacement of about (+0.05, -0.05) m, again suggesting a 45° long axis. A perpendicular width displacement would be about (+0.035, +0.035) m, along (0.707, 0.707). With local Y currently along -X, a world-Z rotation by θ gives the closing direction (-cos θ, -sin θ). At θ = 45°, it becomes (-0.707, -0.707); at θ = 225°, it becomes (0.707, 0.707). Both describe the same closing line. A +45° world-Z rotation would leave local X pointing down, with the new orientation given by Rz(45°) multiplied by the current top-down rotation. For the quaternion product with [0.5, -0.5, 0.5, 0.5] in wxyz order, would the new w component be 0.3536? I would need to compute it. Would this rotation improve the grasp and avoid the bus? It would also change the wrist view and finger positions. The car’s width appears up-right/down-left in the image, so the finger toward world (+X, +Y) would point toward the bus. The bus’s head-image displacement from the car is (+41, -22) pixels, corresponding to world (+X, +Y), approximately the same width direction. Thus, the bus may lie beside the car along the closing direction, and rotating may not remove the collision concern. I could grasp nearer the car’s far end, but I cannot command a smaller opening directly because the gripper command is only open or closed. Using another rough estimate of maximum gripper width 0.09 m, bus center distance 0.09 m, and object widths 0.04 and 0.05 m, the gap would be about 0.045 m. A finger needing a half-width of 0.045 m plus 0.01 m thickness would extend 0.055 m, while the bus’s near edge would be about 0.065 m from the car center. That suggests roughly 1 cm clearance, though these are estimates. An alternative is to move the yellow bus first and remove the neighboring obstacle. It is near (-0.139, -0.18) m, close to the current left link6 position (-0.21, -0.225, 1.0) m. Its long axis appears nearly vertical in the head image, with a displacement around (13, 42) pixels, or approximately (+0.03, -0.08) m in the world plane. That suggests about 20° from -Y, so the current closing direction along X may be suitable. I could shift about 0.08 m to it while avoiding the green car on the left. The bus is larger, with estimated dimensions 0.1 m long, 0.05 m wide, and 0.03 m high, and its right side appears clear, with the red car farther away. Moving it first is attractive for clearing space and verifying its classification. However, the green car is already well aligned, and I have announced that I will start with it. I could explain a change of order, but I can also continue with the green car. I’ll keep the current top-down orientation and make the short simultaneous action: lower the left link6 toward (-0.2165, -0.220, 0.915) m and bring the right toward (0.14, -0.11, 0.98) m for three steps, with both grippers open. Then I’ll inspect the measured poses and images before proceeding.

The left gripper descended only 0.032 m over three control steps, about 0.0107 m per step. Could this be due to the interpolation ramp? Its measured link6 height is now 0.968 m, still above the 0.915 m target. I estimate that three more steps may bring it to about 0.94 m, followed by two more to reach 0.915 m. The right pepper is visible near the top of the wrist image at pixel (170, 20), suggesting that the gripper still has an X–Y alignment offset. Its final approach should align at world coordinates x = 0.14 m and y = -0.11 m. I’ll continue toward the same targets for another three steps.

The left link6 is at z = 0.937 m, putting the fingertips at approximately z = 0.7794 m. The car top may be around z = 0.785 m. I am unsure of the finger pads’ vertical range from link6 to the tips. In the wrist image, the car now spans approximately x = 113–518 and y = 70–425 pixels, with its center near (320, 240). The fingertips appear at image y = 256, and I estimate that the car center should reach image y = 330 at contact. Descending another 0.022 m to link6 z = 0.915 m would put the fingertips at z = 0.7574 m, close to the estimated table height of 0.75 m. The right link6 is at z = 0.985 m, and the pepper center appears near wrist pixel (250, 90). I considered a final link6 height of 0.93 m, based on a pepper-body height of 0.79 m plus a 0.14 m contact offset, and estimated a required descent of 0.055 m. The current fingertips are at z = 0.8274 m, close to the possible pepper-top height of 0.83 m. Could the open fingers touch its top? There is still an X–Y alignment offset of approximately 0.017 m and 0.031 m, so they may remain above it. I could move the right arm toward (0.14, -0.11, 0.94) m for three steps and finish the left descent to z = 0.915 m in about two steps. The open left fingers might already be touching the car. It initially looks as though the green car may have shifted, but its head-camera position near (208, 296) is essentially unchanged, so I do not see evidence of displacement. I’ll retain the top-down orientation without adding yaw alignment. I’ll use three steps for both arms, keeping both grippers open and targeting link6 heights of 0.915 m on the left and 0.94 m on the right. For the pepper, the desired grasp-center height is 0.80 m; a contact location at local x = 0.14 m gives link6 z = 0.94 m. The right fingertips would then be at z = 0.7824 m, approximately 0.032 m above the estimated table, suitable for contacting the pepper’s sides around mid-body. The left fingertips would be at z = 0.7574 m, approximately 0.007 m above the table. Small variations or finger thickness could cause table contact, but I judge that clearance acceptable. The left descent is 0.022 m and may need two steps; the right descent is 0.045 m and might need four, so it may not fully arrive within this three-step action.

The green car appears between the left gripper’s open jaws, and the pepper appears between the right gripper’s open jaws. In the left wrist image, the left finger spans approximately x = 0–130 pixels, while the car body spans x = 85–550 pixels. Is the jaw gap at the contact location large enough? The car initially looks larger than the gap, but the visible fingertips are at approximately (120, 256) and (520, 256), giving a gap of about 400 pixels. The car’s width perpendicular to its length may be only about 200 pixels, which looks suitable. In the right wrist image, the pepper spans approximately x = 160–455 pixels, a width of about 295 pixels, compared with a jaw gap of about 400 pixels. The bottom of the car is clipped at image y = 480 pixels, and its center may be near (300, 280). The pepper’s center appears near (300, 250). Before closing, I should finish moving to the final link6 heights of 0.915 m on the left and 0.94 m on the right. The current heights are 0.923 m and 0.948 m, respectively, leaving each arm 0.008 m above its desired height. One control step may reach those targets. I’ll use one step with both grippers still open to settle the final approach before closure.

The left arm did not move: its commanded link6 height was 0.915 m, but it stayed at 0.923 m. Perhaps a fingertip is contacting the car or table and causing resistance. The right arm reached 0.941 m. The green car appears unchanged, although the left gripper could be against the table. At link6 z = 0.923 m, I estimate the fingertip height as 0.7654 m, which would be clear if the table is at z = 0.75 m. Why did the left arm not move the remaining 0.008 m? Perhaps joint limits stalled its progress after the precheck passed, or contact prevented the descent. More likely, the slight difference between the measured orientation and the exact target quaternion affected the local IK solve, and one step was insufficient. Could native interpolation move only every two steps? The right arm moved 0.007 m, though, so contact or a collision on the left remains possible. I can close at the current left link6 height of 0.923 m rather than descend further. A contact location at local x = 0.14 m would be around world z = 0.783 m. Is that close enough to the estimated car top or center at z = 0.768 m? It is slightly high, but the finger pads extend toward the tip at about z = 0.765 m, so they should be able to contact the upper sides. I’ll hold both arms at their current measured poses and close both grippers without adding downward motion. I considered two steps, but native gripper interpolation may require multiple steps. I’ll use three, within the recommended 1–3 steps for closure, then inspect the images and opening command, which I expect to reach 0.

The opening command is still about 0.44 after three steps, suggesting that closure interpolation is progressing slowly, at roughly 0.185 per step. I estimate that three more steps are needed to reach 0. Both objects still appear between the fingers, which have moved closer together. I’ll continue closing both grippers for three steps while holding the arm poses steady.

After three additional closure steps, the opening commands are 0.401 on the left and 0.459 on the right. This suggests the objects may be preventing full closure, but the description says these values are the latest interpolated commands, not measured finger gaps, and they can differ from the requested endpoints. Why have they stopped near 0.4 rather than reaching 0 after six steps? Could the controller’s interpolation depend on physical contact, or could contact limit the reported interpolated target? I am not sure. The fingers appear to surround the car and pepper. The green car changed from diagonal to vertical in the wrist view during closure, which suggests the fingers rotated it into alignment with the jaws. It may also have moved slightly in the head view, but it is still on the table. The pepper appears stable. I’ll make a small test lift, commanding both link6 heights to increase by 0.04 m: the left to 0.963 m and the right to 0.981 m. I’ll keep the current orientations and the grippers commanded closed, using three control steps. I expect roughly 0.03 m of actual motion and will check whether the objects move with the grippers.

Did both grasps succeed? In the head view, I estimate the green car’s current center at pixel (200, 293), compared with its initial center at (209, 295). The left link6 is now at (-0.217, -0.223, 0.953) m. At the car’s original estimated height of z = 0.768 m, its head-camera projection was around (209, 294). If it rose by 0.03 m to z = 0.798 m with the same X and Y coordinates, I would expect a projection around (201, 283). The visible car spans approximately X = 185–216 and Y = 276–310 pixels, with a center near (200, 293). Its apparent change of about -9 pixels in X and 0 in Y may indicate a 0.03 m lift with some change in world Y. For the candidate center (-0.217, -0.223, 0.798) m, I tentatively estimate a projection near (202, 286), which is reasonably close. The car remains centered and similarly sized in the wrist view, supporting the conclusion that it is held. The right pepper moved in the head view from approximately (389, 237) to (390, 230) as the right gripper rose by 0.036 m. Its appearance in the wrist view remains the same, so I conclude that it is held as well. I can now prepare to transport them to the baskets, but I should refine the basket coordinates first. My tentative left-basket target center is (-0.32, 0.08) m, with its bottom around z = 0.78 m; the right-basket center may be at (0.32, 0.08) m. Could I triangulate the basket interiors from the current head and wrist views? The left basket is outside the current left wrist view because that camera is looking down at the car. I could instead use the head view with an assumed table or basket-bottom height. The basket bottom may be at z = 0.75 m, and its walls may be 0.05 m high. Placement needs to leave the object supported inside. In the head image, I estimate the left basket’s outer opening rim spans X = 124–259 and Y = 139–213 pixels. Its white interior-bottom polygon spans X = 147–238 and Y = 159–199, with an interior center around (192, 178). Inverting the projection with an assumed interior-bottom height of z = 0.765 m gives approximately x = -0.31 m and y = 0.091 m. Earlier estimates at z = 0.78 m gave (-0.314, 0.077) m, while z = 0.75 m gave (-0.332, 0.105) m. For a more precise basket-center estimate, I can triangulate matching corners using the initial left wrist view, where the basket is fully visible. A possible interior back-left corner is near head pixel (153, 151), but I need to inspect it. I’ll prepare gridded versions of the initial head and left wrist images so I can identify corresponding corners.

The gridded initial left-wrist image is ready. I’ll inspect it to identify basket corners that can be matched with the head view and refine the left basket’s placement location.

In the initial left-wrist view, the left basket’s back-left outer rim corner may be at pixel (203, 157). My tentative mapping places the back edge from (209, 157) to (455, 157), the front-left outer corner at (170, 224), and the front-right outer corner at (524, 228). The grid image is enlarged 2×, but its labels use the original pixel coordinates. The front edge of the interior bottom may be at y = 235 pixels, though it is difficult to distinguish. I’ll inspect high0_grid.png to identify the corresponding basket corners in the head-camera view.

I estimate the left basket’s outer rim corners in the head image as back-left (149, 140), back-right (250, 140), front-left (125, 188), and front-right (257, 190) pixels, though these are tentative. Looking more closely at the initial head view, I estimate them as (149, 140), (249, 140), (126, 188), and (256, 188), respectively. In the initial left-wrist view, the corresponding outer corners appear at (205, 157), (457, 157), (170, 225), and (525, 225). For triangulation, I’ll use these head-to-wrist pixel correspondences: back-left (149, 140) to (205, 157), back-right (249, 140) to (457, 157), front-left (125, 189) to (170, 225), and front-right (256, 189) to (525, 225). These matching corners should yield consistent world-coordinate estimates and an estimate of the rim’s Z height. I’ll run the calculation now.

The triangulated rim height is approximately z = 0.835–0.84 m, but the corner correspondences are imperfect. The left basket’s front corners have X coordinates near -0.406 and -0.140 m, giving a front midpoint near x = -0.273 m, y = -0.009 m. The back midpoint is near x = -0.29 m, y = 0.133 m. These suggest a basket center around (-0.28, 0.06) m and a rim height of 0.835 m. This differs from the earlier inverse-projection estimate of (-0.314, 0.077) m at z = 0.78 m. Using a rim height of 0.835 m and an image-center Y coordinate of 175 pixels instead gives approximately x = -0.278 m, y = 0.03 m. I need better corner correspondences for precision, but a basket width of about 0.27 m and depth of 0.17 m seem plausible. Another center estimate is x = -0.28 m, y = 0.065 m. The middle basket may be centered at x = 0, and the right at x = 0.28 m. The basket spacing in the head image is about 128 pixels. At rim height z = 0.835 m and world y = 0.06 m, the optical depth is approximately 1.337 + 0.03 - 0.723 = 0.644 m. The X scale is approximately 0.00223 m per pixel, so 128 pixels corresponds to 0.286 m, suggesting outer basket centers near x = ±0.285 m. At the earlier assumed object or table height of z = 0.78 m, the optical depth is larger, about 0.68 m, and the inferred spacing is about 0.30 m. The earlier outer-center estimate was ±0.314 m; I now think ±0.28 m is more likely. The back-left triangulation has a ray gap of about 0.014 m, which is large and suggests that I selected different physical corners in the two images. Perhaps the head-camera back-left corner is actually at (151, 141) pixels and the wrist-camera corner at (204, 157). Could that explain the mismatch? I could use basket symmetry to fit the corners, but I only need the center to within approximately 0.02 m. I’ll use placement centers of (-0.28, 0.06) m for the left basket, (0.28, 0.06) m for the right, and (0, 0.06) m for the middle. The rim is around z = 0.835 m; the bottom may be at z = 0.755 m, implying a wall height of about 0.08 m. During translation, the held objects’ bottoms need to be above z = 0.85 m to clear the rims, after which I can lower them into the openings. The green car is held with left link6 at z = 0.953 m, and its bottom may be around z = 0.775 m. Alternatively, its 0.03 m test lift from an estimated table height of 0.75 m puts its bottom at 0.78 m, still below the 0.835 m rim. Raising left link6 to 1.04 m would put the car bottom around 0.867 m, clear of the rim. The pepper’s bottom was initially around 0.75 m and rose by 0.036 m to about 0.786 m. Raising right link6 to 1.06 m would put its bottom around 0.869 m. I could transport with link6 at z = 1.08 m, perhaps putting the object bottom around 0.91 m. The arm’s maximum link6 height might be about 1.1 m, though that is uncertain. I’ll instead target z = 1.06 m for both arms while beginning the horizontal motion toward the baskets. The full left target (-0.28, 0.06, 1.06) m is about 0.297 m from the current measured pose (-0.217, -0.223, 0.953) m, exceeding the 0.25 m command limit. I need an intermediate left waypoint at (-0.26, -0.08, 1.06) m, which I estimate is 0.176 m away. The right target (0.28, 0.06, 1.06) m is within the limit from the current pose (0.141, -0.112, 0.977) m. I initially estimated its distance as 0.247 m; its displacement components are (0.139, 0.172, 0.083) m, giving sqrt(0.0193 + 0.0296 + 0.0069) = approximately 0.236 m. I considered 12 steps, but at approximately 0.01 m per step, the 0.236 m right-arm move could require about 24 steps. The per-action maximum is 15, so this action may only partly reach the targets. I’ll use 15 steps. I judge the rising, forward paths to be clear: the left car moves from y = -0.223 toward -0.08 m, with the yellow bus near (-0.14, -0.18) m to its right. The right pepper moves from approximately (0.14, -0.11) toward (0.28, 0.06) m. The red basket’s front rim may be near y = -0.02 m, so the elevated approach should provide clearance. The right chocolate bar near (0.37, -0.13) m is also to the right of the path, and the arms remain more than about 0.4 m apart. I’ll retain the top-down orientation and keep both grippers commanded closed for the 15-step motion to these targets.

The right target failed the precheck. Perhaps the position at x = 0.28 m, y = 0.06 m, and z = 1.06 m is too high or too far for the local solve. I could use a closer intermediate right link6 target at (0.22, -0.03, 1.06) m, which I estimate is about 0.13 m away and may work. The left target passed, but neither arm moved because the right precheck failed. I’ll use a slightly lower right waypoint at (0.22, -0.03, 1.04) m and retain the left waypoint at (-0.26, -0.08, 1.06) m for 12 control steps. The displacement from the current right pose to this revised target is (+0.079, +0.082, +0.063) m, with a total distance of about 0.13 m, which is within the command limit.

The green car appears held in the left gripper, and the pepper appears held in the right. The left gripper is now near the left-side peppers but remains high. The green car appears near head-camera pixel (183, 225); I am unsure how far it has lifted. The right pepper appears near pixel (433, 184), within the red basket’s image projection, perhaps above its front portion. I can move the left link6 from its measured position of (-0.245, -0.135, 1.016) m toward the basket-center target (-0.28, 0.06, 1.06) m. I estimate the distance as 0.202 m, within the command limit. Moving the right link6 from (0.215, -0.041, 1.032) m to (0.28, 0.06, 1.06) m would be approximately 0.123 m. Perhaps the earlier precheck failed because that target was about 0.236 m away from the previous pose. The local IK precheck searches for the final target from the current joints, so it may now converge. I could try a lower right target at (0.28, 0.06, 1.02) m, but I need to avoid the rim. My first rough estimate puts the pepper’s bottom around z = 0.81 m at that link6 height. More specifically, its initial bottom was around z = 0.75 m, and the grasp link6 height was 0.941 m, giving an estimated bottom offset of -0.191 m relative to link6. At the current link6 height of 1.032 m, that puts the pepper’s bottom around z = 0.841 m, just above the estimated rim height of 0.835 m. At link6 z = 1.02 m, its bottom would be around z = 0.829 m, slightly below the rim, although that could be acceptable once centered inside the opening. For transport across the front rim, I should maintain a right link6 height of 1.04 m until the pepper is centered. I’ll therefore target right (0.28, 0.06, 1.04) m, approximately 0.12 m away, and left (-0.28, 0.06, 1.06) m, approximately 0.202 m away. Both targets remain high. I’ll use 15 control steps, though the arms may still fall short of their targets.

In the head view, the left car appears at pixel (184, 198), over the front center of the left basket, and the pepper appears at (449, 165), within the red basket’s image projection. I should move forward toward y = 0.06 m and adjust X slightly. For the left arm, moving from its current y = -0.062 m to 0.06 m requires a +0.122 m change in Y, while its link6 height would increase from 1.03 m to 1.04 m. Perhaps the earlier target failed because the move was about 0.2 m and encountered a singularity. The smaller remaining Y change of 0.122 m may now pass the precheck. The right arm would move from (0.25, -0.003, 1.038) m to (0.28, 0.06, 1.04) m, a distance of about 0.07 m, which also seems likely to pass. I’ll try eight control steps.

The calculated projections match the observed car and pepper positions exactly, which supports my estimates of their centers relative to the grippers. The left basket’s estimated rim center at (-0.28, 0.06, 0.835) m projects to pixel (195, 164), close to the head-view interior center around (191, 167). The right pepper projects to (448, 164), nearly the same image position as the right basket center at (449, 164). However, the pepper’s estimated world position is (0.25, -0.003, 0.897) m, while the basket rim center is (0.28, 0.06, 0.835) m. Their projections coincide along the camera ray, so the pepper is aligned in the image but physically above and in front of the basket center. Lowering it vertically at its current X and Y might land it in the front portion of the basket. The basket interior may extend ±0.13 m in X and ±0.08 m in Y around a center perhaps at (0.28, 0.04) m. Under that estimate, the pepper at x = 0.25 m and y = -0.003 m might already be over the front-left interior, allowing placement without reaching y = 0.06 m. I need more accurate basket geometry, though. The triangulated corners suggest a front midpoint at y = -0.009 m and a back midpoint at y = 0.133 m, giving a center at y = 0.062 m. I estimate the inner front edge at y = 0.006 m and the back edge at y = 0.12 m. That places the pepper just in front of the inner front edge. Its estimated 0.05 m radius extends into the basket, but lowering here could leave it straddling the front rim or cause it to bounce inward. I should move it forward by at least 0.03 m to get inside. A target at y = 0.02 m would require a +0.023 m change from y = -0.003 m and might be reachable. I am interpreting the failed y = 0.06 m target’s 0.0449 m position error as a best Y position of 0.0151 m, suggesting a forward reach limit around y = 0.015 m at link6 z = 1.04 m with the downward orientation. A target at y = 0.01 m therefore seems likely to work and would put the object center just inside the front edge. Its bottom might still contact the rim during lowering, so tilting or releasing from above may be preferable. I suspect the container success check uses the object center within a bounding box rather than requiring exact centering; y = 0.01 m might qualify if the outer front edge is at y = -0.03 m. Even y = 0 might be sufficiently inside the outer rim. The skill asks me to place as close to the center as possible, but the apparent reach constraint may prevent exact centering. Lowering might permit more forward reach. I could try y = 0.01 m at link6 z = 1.02 m, or test y = 0.02 m at z = 1.0 m to see whether the precheck error disappears. At link6 z = 1.0 m, my estimated pepper center is 1.0 - 0.141 = 0.859 m and its bottom is about 0.81 m. The bottom would be below the 0.835 m rim while the center remains above it. That is acceptable if it is already over the opening, but moving from y = -0.003 m to 0.02 m at that height could collide with the front rim. I should maintain link6 z = 1.04 m while crossing, then lower. Reaching y = 0.015 m may be enough. I also need to choose a release height. Lowering at fixed Y to link6 z = 0.94 m might put the pepper bottom around z = 0.71 m, below the basket floor. Would z = 0.99 m be a better release height? The pepper’s estimated bottom offset is its initial bottom height, 0.75 m, minus its grasp link6 height, 0.941 m, or -0.191 m. Resting it on an estimated basket floor at z = 0.755 m would require link6 z = 0.946 m. At that height, the fingertips would be at 0.946 - 0.158 = 0.788 m, below the rim. Although they would be within the opening, at y = 0.015 m they would be close to an inner front wall perhaps at y = 0.01 m and could collide during descent. Releasing at link6 z = 1.0 m would instead leave the pepper bottom at 0.809 m for a 0.054 m drop to the floor, avoiding deep finger insertion. I judge that small drop suitable for container placement. For the car, the estimated bottom offset is 0.75 - 0.923 = -0.173 m. At link6 z = 1.0 m, its bottom would be at 0.827 m, just below the 0.835 m rim, with a release drop of about 0.07 m if it is over the opening. At link6 z = 1.02 m, its bottom would be at 0.847 m, above the rim, with a drop of about 0.09 m. Releasing from z = 1.02 m at y = 0.015 m seems safer; I expect the car to fall into the front portion and remain contained. First I need a passing precheck for the nearer raised positions. I have considered y = 0.015 m at link6 z = 1.04 m, but I’ll try left (-0.28, 0.01, 1.04) m and right (0.28, 0.01, 1.04) m. The left target displacement is (-0.023, +0.072, +0.01) m, about 0.076 m overall. The right displacement is (+0.03, +0.013, +0.002) m, about 0.033 m overall. The left arm may have a similar forward limit near y = 0.015 m. I’ll use eight control steps, retaining the downward orientations and keeping both grippers closed.

The green car has slipped out during transport. In the head view, it is now on the table between the left peppers near pixel (187, 228), rather than in the basket. In observation 90 it appeared held near the basket front, but in observation 98 the left fingers appear fully closed and the car has fallen back near its earlier location. The left opening command is now 0. I initially wondered whether that meant the gripper was open, but 0 means closed; it appears to be closed and empty. Perhaps the car was only trapped between the fingers rather than securely grasped and then slipped during motion. I need to recover it with a more stable grasp. Its new position is near the front left pepper at pixel (174, 251) and near the basket front. The right pepper still appears held over its basket. The right link6 position is (0.28, 0.007, 1.038) m, and the pepper appears near head-camera pixel (461, 160), over the basket interior. I should release it first. I could command the right gripper open while holding the left arm at its current pose, then inspect after three steps to check whether the pepper falls into the red basket. Alternatively, I can simultaneously open and retract the empty left gripper to prepare for recovery. The green car is visibly on the table, so I believe the left gripper is empty. Its current link6 position is (-0.273, -0.02, 1.034) m with the downward orientation, and I estimate its fingertips are at z = 0.876 m, above the estimated table height of 0.75 m. A proposed move up and back to (-0.25, -0.12, 1.0) m with the gripper open may be safe, while the right arm holds its pose and opens. I considered four steps for this action: the right opening command would move from 0.459 toward 1, and with an estimated opening speed of 0.18 per step, four steps might bring it to about 0.9, which should be enough. Before taking that action, I’ll estimate the fallen car’s world position from head-camera pixel (187, 228), assuming its height is z = 0.768 m. I’ll use Python to invert the projection so I can position the left gripper above it for recovery.

The fallen car’s estimated center is at x = -0.295 m, y = -0.068 m, near the basket front and the front pepper at (-0.291, -0.142) m. Their Y coordinates differ by about 0.074 m. Could the car be lying on the pepper, with its height perhaps at z = 0.79 m? In the head view, the green car at pixel (187, 228) and the front pepper at (174, 250) appear separate, and the car looks supported by the table. Its original center was approximately (-0.217, -0.22) m, compared with its current estimate of (-0.295, -0.067) m—a substantial move of about 0.17 m after slipping near the basket. I can release the right pepper while opening the left gripper and moving directly above the fallen car. The left link6 target of (-0.295, -0.068, 1.0) m is about 0.063 m from its current measured position of (-0.273, -0.02, 1.034) m. The basket’s front wall is estimated to lie around y = -0.03 to 0 m, while the approach target is at y = -0.068 m. With the fingers pointing downward at link6 z = 1.0 m and opening along world X, I judge this approach safe. The car is in front of the basket, and the front pepper is behind it at y = -0.142 m; the opening direction, local Y mapped to world -X, should avoid contact with that pepper along Y. I’ll use four steps to move the open left gripper to the approach target while holding the right arm’s pose and opening its gripper.

The right pepper is now stable inside the front portion of its basket. The green car is upside down, with its head-camera center near pixel (207, 246), compared with (187, 228) in observation 98. Did it move during the left-arm motion? The left link6 moved from (-0.273, -0.02, 1.034) m to (-0.28, -0.033, 1.025) m without reaching its target. Only four steps were executed, though contact with the basket is another possibility. Could the car have fallen from the gripper later than I thought? In observation 98, the left opening command was 0, and I interpreted the gripper as closed and empty, with the car near pixel (187, 228). Its down-right shift by observation 102 may instead reflect continued falling or rolling after the slip. It may have still been in midair in observation 98, changing its apparent projected position. It now appears settled upside down on the table at the new location. I should update its world position by triangulating its current head-camera center at (207, 246) with its left-wrist center at approximately (408, 300). The current left link6 position is (-0.28, -0.033, 1.025) m, so the gripper is not yet above the car. I’ll calculate the stereo position before choosing the next target; its new world X coordinate remains to be determined. For the upside-down grasp, the flat roof may be underneath with the wider chassis exposed on top. I’ll aim to grasp across its width at the center with the fingers pointing downward. The contact height may be around 0.76 m, requiring a link6 height around 0.90–0.91 m, but these remain estimates.

The estimated car position is (-0.236, -0.116, 0.774) m, and the front pepper is at (-0.285, -0.145, 0.807) m. Their centers are about 0.058 m apart, so the objects are probably touching. Is the car’s length aligned with world Y? It appears vertical in the head image, with its width across X. The pepper is to its left. Although I initially thought it would be outside an X-directed closing path, the left finger could be at x = -0.286 m and collide with it. I could rotate the gripper to close along Y, avoiding the pepper on the left and perhaps the basket in front. Closing across X would be ideal for the car’s apparent long axis, but the pepper blocks that approach. Grasping the front and back of the car along Y might be less stable: its length is about 0.09 m, while the maximum gripper opening may be about 0.1 m. Another option is to move the front pepper first to clear access to the car. The right arm is currently at the basket with its gripper open and could handle another object while the left arm picks the pepper. However, getting a left-side pepper into the right basket may require a transfer between arms. With the left base around x = -0.3 m and the right basket at x = +0.28 m, the cross-table reach seems long. I estimated the X span as about 0.56 m at y = 0 and z = 1.0 m, perhaps near an arm reach of 0.6 m. I could temporarily put the pepper in the middle basket and have the right arm transfer it, though that would not satisfy its final destination and would add work. The right arm might instead reach the pepper directly at (-0.285, -0.145) m, but that also involves roughly 0.6 m of cross-table reach. The base positions are uncertain from the head view; another estimate is x = ±0.4 m and y = -0.55 m. On that estimate, the left arm’s reach to the right basket could be about 0.9 m and likely impossible. Perhaps each arm can reach all destinations, or perhaps the failures at y = 0.06 m were caused by the downward orientation rather than general reach. A different orientation might extend the reach. I have 998 control steps remaining, so there is room to work through this. Pushing might also get objects into baskets, but I’ll use grasps. A handoff near the center may be necessary. The left arm could pick a pepper, move it to x = 0, y = -0.1 m, let the right arm grasp it, then release it for the right arm to place. The red car could similarly be transferred to the left arm. The skill discourages using both grippers on one object unless necessary, but cross-category placement may justify it. My rough reach estimate for an ARX X5 is 600 mm, with 600 mm base spacing. From a left base at x = -0.3 m to an opposite basket at x = +0.3 m, the 0.6 m X difference plus a 0.4 m Y difference gives about 0.72 m, beyond that estimated reach. A nearer right-basket point at x = 0.2 m, y = -0.03 m might reduce the components to about 0.5 m each, but that still gives about 0.707 m. Reaching the left peppers directly with the right arm has a similar estimated 0.72 m distance. A central transfer therefore seems likely. I could assign the left arm the left-side objects—two peppers, two cars, and one chocolate bar—and the right arm the red car, one chocolate bar, and the pepper already placed. The left peppers would transfer to the right arm, and the red car to the left. Exchanging a pepper and car simultaneously between occupied grippers would require complicated, precise contact. Sequential transfers would be simpler. A temporary table placement at x = 0, y = -0.15 m would let one arm release the object before the other picks it up, avoiding simultaneous contact. Direct handoffs remain an alternative, but a table transfer seems more robust. The transfer area must remain clear. The red car is initially near (-0.01, -0.08) m. The right arm could place it at (-0.05, -0.25) m for the left arm, while the left arm could place a pepper at (+0.05, -0.25) m for the right. The yellow bus is near (-0.139, -0.18) m, the green car near (-0.236, -0.116) m, and the chocolate bars near x = ±0.37 m. The center-front area at x = 0, y = -0.25 m appears clear and should be reachable by both arms. I’ll first consider moving the front pepper to clear the green car. With the current downward orientation and closing along world X, the green car on the pepper’s right could obstruct the right finger. A top-down pepper grasp with closure along Y would avoid that adjacency. The pepper is roughly symmetric, so I can rotate the gripper 90° about world Z, mapping local Y to world -Y and spacing the fingers front to back. The basket is forward near y = +0.06 m, and the chocolate bar is behind near y = -0.199 m. The pepper is at y = -0.145 m, while the car is to its right at y = -0.116 m. The back pepper at (-0.385, -0.091) m and the chocolate bar at (-0.366, -0.199) m are well to the left; the yellow bus at (-0.139, -0.18) m is well to the right. The Y-directed finger path appears clear. Alternatively, I could grasp the green car along Y. Fingers spaced by about ±0.05 m around y = -0.116 m would put the forward finger near y = -0.066 m, perhaps clear of the basket near y = 0. The pepper at (-0.285, -0.145) m would be to the side. The car’s approximately 0.09 m length might just fit the estimated 0.1 m opening, allowing contact on the front and rear bumpers. Its upside-down chassis is exposed and flat; another length estimate is 0.085 m. A deeper grasp could work, but closing across its width would still be preferable. I could also shift the car slightly right or grasp farther from the pepper. Moving the pepper first with a Y-aligned grasp is simpler. The right arm can leave the basket and approach either the red car or the right chocolate bar. For the red car, the estimated position is (-0.01, -0.08, 0.77) m. From the current right link6 pose at (0.28, 0.007, 1.038) m, the approach distance would be about 0.31 m, exceeding the 0.25 m target limit. A waypoint at (0.12, -0.08, 1.0) m would be about 0.19 m away, allowing a subsequent approach. The red car is elongated along world X, so the current X-directed closure would grip along its length. A 90° yaw rotation to close along Y would be better and could happen during travel. For that orientation, I can multiply the current downward rotation by a +90° world-Z rotation: Rz(90°) maps local Y from -X to -Y while leaving local X downward. The current downward quaternion is [0.5, -0.5, 0.5, 0.5] in wxyz order. My tentative multiplication uses [0.707, 0, 0, 0.707] for the Z rotation. I get w = 0.3535 - 0.3535 = 0, x = -0.3535 - 0.3535 = -0.7071, y = 0.3535 + 0.3535 = 0.7071, and z = 0.3535 + 0.3535 = 0.7071, giving [0, -0.7071, 0.7071, 0.7071]. I need to check this with SciPy. The whole rotation is 90°, exceeding the 1 rad orientation limit, so I need an intermediate 45° rotation. My tentative intermediate quaternion is [0.353553, -0.612372, 0.353553, 0.612372], also to be checked. Both arms currently have the downward orientation. I could rotate both through 45° and then 90° while moving the left above the front pepper at (-0.285, -0.145, 1.0) m and the right toward the red-car waypoint at (0.12, -0.08, 1.0) m. The left move from (-0.28, -0.033, 1.025) m is about 0.114 m, and the right move is about 0.19 m. At left link6 z = 1.025 m, I estimate the fingertips at z = 0.867 m, above object tops around 0.83 m. Rotating about Z keeps the fingers downward, with the approximately 0.1 m open gap sweeping above the objects. The right fingertips are around z = 0.88 m at link6 z = 1.038 m, about 0.045 m above the estimated 0.835 m basket rim. That appears sufficient for rotating while withdrawing from the basket. A simpler parallel action is for the right arm to collect its chocolate bar while the left handles the pepper, deferring the red car. The right chocolate bar is estimated at (0.371, -0.13, 0.783) m. Its length is along Y, so the current downward orientation with closure along X is suitable. Moving from the right arm’s current (0.28, 0.007, 1.038) m pose to an approach at (0.37, -0.13, 1.0) m is about 0.164 m and requires no rotation. It could then go to the middle basket at x = 0, y = 0. Is that reachable for the right arm at z = 1.0 m from a base near x = 0.3 m? It seems plausible. This would sort the right-side chocolate bar while the left rotates for the pepper; parallel actions do not need to handle matching object types. I’ll choose that plan: rotate the left gripper 45° about world Z and move it above the front pepper at (-0.285, -0.145, 1.0) m, while moving the right gripper above the chocolate bar at (0.371, -0.13, 1.0) m with its current downward orientation. I’m considering 12 control steps for the eventual motion. First, I’ll compute and check the 45° and 90° left-gripper quaternions with SciPy.

My earlier quaternion product was wrong. The orientation for closing along world Y is [0, -0.707, 0, 0.707] in wxyz order. I should check the local X direction as well. The original downward quaternion is [-0.5, 0.5, 0.5, 0.5] in SciPy’s xyzw order; multiplying it by a 90° world-Z rotation gives [-0.707, 0, 0.707, 0] in that order, or [0, -0.707, 0, 0.707] in wxyz order. Local Y points along world -Y, as intended. The intermediate quaternion is [0.270598, -0.653281, 0.270598, 0.653281] in wxyz order. I’ll use 12 control steps to move the left link6 to (-0.285, -0.145, 1.0) m with the intermediate orientation, while moving the right link6 to (0.371, -0.13, 1.0) m with its existing downward orientation. Both grippers will remain open.

The left wrist has not reached the intermediate orientation. Its measured quaternion is [0.376, -0.599, 0.379, 0.597] in wxyz order, which I estimate represents about 30° of the planned 45° yaw rotation. Its Y position is -0.108 m rather than the target -0.145 m. The right arm made little progress during the 12 steps, moving from approximately (0.28, 0.007) m to (0.32, -0.025) m in X and Y. It still needs to reach (0.371, -0.13, 1.0) m; I estimate about 16 more control steps may be needed. In the left wrist view, the front pepper appears near pixel (260, 285), the car near (440, 215), and the bus at the bottom right. The fingers are diagonal, but this is only the intermediate orientation. What world direction will they close along at this point? The final orientation for closing along world Y may still be about 60° from the current orientation: approximately 15° to the intermediate pose, then another 45° to the final pose. My estimate of 60°, or 1.047 rad, is slightly above the 1.0 rad command limit, so I should finish the intermediate rotation first. I considered five steps before commanding the final orientation. Instead, I’ll use eight steps toward the existing intermediate quaternion [0.270598, -0.653281, 0.270598, 0.653281] and left position (-0.285, -0.145, 1.0) m, while continuing the right arm toward its unchanged target. Both grippers will remain open. I expect this to finish the left intermediate approach and advance the right arm; afterward, I can proceed to the left wrist’s final orientation.

The left gripper has reached the intermediate yaw above the front pepper, while the right arm is still approaching the chocolate bar. I’ll keep the left link6 position unchanged and finish rotating it to the downward orientation with closure along world Y. The remaining orientation change is approximately 45°, or 0.785 rad. I’ll continue toward the same right-arm target and use 10 control steps, keeping both grippers open.

The chocolate bar’s estimated height of z = 0.7665 m seems more plausible for its top. Its estimated center is at x = 0.3828 m, y = -0.1190 m, so the right link6 should shift by approximately +0.012 m in X and +0.010 m in Y. Could the grasp contact be at z = 0.766 m? With link6 at z = 0.91 m and contact at local x = 0.14 m, the contact height would be about 0.77 m and the fingertips about 0.752 m. That looks suitable. The left pepper’s estimated z = 0.811 m may correspond to the top or stem rather than its center. Does the body-center point at head-camera pixel (174, 251) include the top? Its body top may be around 0.81 m, with side contacts around z = 0.79–0.80 m. A link6 height of 0.94 m worked for the right pepper, so I’ll use 0.94 m here as well. For the right gripper, I’ll apply a -39° yaw about world Z to its current downward orientation, using Rz(-39°) multiplied by that orientation. The angular change is 0.681 rad, below the 1.0 rad limit. I can rotate and move it to the approach position (0.383, -0.119, 0.96) m, approximately 0.043 m away, while the left wrist finishes its yaw alignment at (-0.287, -0.152, 1.0) m with the downward orientation that closes along world Y. I’m planning eight control steps for that motion, then a right-arm descent to z = 0.91 m over 3–6 steps and a left-arm descent to z = 0.94 m. First, I’ll compute the right gripper’s rotated quaternion.

The rotation matrix gives local Y components of (-0.777, 0.629), pointing opposite the desired width direction, so the closing alignment looks good. Local Z has components (0.629, 0.777); does that align along the chocolate bar? It seems acceptable. I’ll proceed with the action.

The left wrist’s final yaw looks good. The right wrist has only rotated partway toward the planned -39° yaw: its measured quaternion is [0.585, -0.396, 0.586, 0.396] in wxyz order, compared with the target beginning [0.638, -0.304]. I estimate its current yaw at about -21°, roughly halfway through the requested rotation. However, the chocolate bar now appears vertical in the wrist view. In observation 132 it ran diagonally from bottom left to top right; rotating the camera and gripper by about -20° appears to have made it vertical in observation 140. Continuing to -39° might make it diagonal in the opposite direction. My earlier visual angle estimate may have been wrong because of anisotropy in the image’s vertical direction. With the original downward orientation, the fingers appear on the left and right of the wrist image, and their closing direction is horizontal: local Y maps to world -X, while the camera’s image X direction maps to world X. A vertical object long axis therefore looks appropriate for closing across its width. I’ll stop the right wrist’s rotation and hold its current quaternion, which is close to a -20° yaw, rather than continue toward -39°. The left pepper is centered near wrist pixel (300, 200). Do the fingers still look diagonal? In the left gripper’s final downward orientation, local Y points along world -Y. The 90° world-Z rotation also maps the camera’s image X direction to world Y, so closing along world Y should project horizontally, with the fingers on either side. The car appears below and to the right of the pepper. Could the open right finger contact it during descent? The car’s offset is along world +X, which may project downward rather than between the jaws. The two objects remain adjacent in the wrist image, and the open fingers extend upward from the bottom left and bottom right. There is still some uncertainty about clearance near the car, but I’ll proceed with the short descent using this alignment. The right link6 X–Y position, (0.384, -0.119) m, looks good, and the chocolate is centered near pixel (320, 180). I had considered a final right link6 height of 0.91 m, which would put a contact point at local x = 0.14 m around world z = 0.77 m. For this action, I’ll target right (0.384, -0.119, 0.915) m and left (-0.287, -0.152, 0.94) m, keeping both grippers open. I’ll use the right’s rounded measured quaternion [0.585, -0.396, 0.586, 0.396] and the left quaternion [0, -0.7071068, 0, 0.7071068], both in wxyz order. I could read the full-precision measured pose from observation.json, but the three-decimal quaternion should be close enough given the approximately 1.14° precheck rotation tolerance. The requested descents are 0.06 m on the left and 0.046 m on the right. I considered four control steps, but three may produce only about 0.032 m of motion, with five or six needed to finish. The grasping instructions call for actions of 1–3 steps, so I’ll use three now and inspect before continuing.

The right link6 is at z = 0.926 m, nearly at grasp depth, and the chocolate appears large and centered in the wrist view. The left link6 is at z = 0.967 m above the pepper. I estimate that the left arm needs another three steps to reach z = 0.94 m, while the right may need only one step to reach z = 0.915 m. However, the same step count applies to both arms, so I’ll use three steps with both grippers open and their orientations unchanged. The right controller should hold its target once it arrives. There is a possible risk of pushing against the table if the right grasp-height estimate is wrong, but I judge the planned height acceptable. At right link6 z = 0.915 m, I estimate the fingertip height as 0.7574 m, about 0.007 m above the estimated table height of 0.75 m. At left link6 z = 0.94 m, the fingertip height would be about 0.782 m, with the pepper’s bottom around z = 0.75 m. I’ll proceed with the three-step descent.

The right link6 has stopped at z = 0.923 m despite the target of 0.915 m, just as the left arm did during the initial green-car grasp. Contact with the object or table may be preventing further descent. The estimated fingertip height is 0.7654 m. Could the table surface be at z = 0.765 m? That would explain the stopping height, but the triangulated green-car roof center at 0.768 m and chocolate top at 0.766 m would then be almost level with the table. The chocolate would have to be extremely thin or embedded for that interpretation to make sense. I also considered whether the finger geometry extends lower than expected. The farthest extent along local +X is 0.1576 m; perhaps an extent along local Z could lower the fingers further, but local Z is horizontal in the downward orientation, so that does not explain it. Another possibility is that the table is at z = 0.75 m and the fingertips are contacting the bar near z = 0.765 m. Although the open fingers straddle the object, misalignment or an opening that is too narrow could leave their inner faces over its edges. If contact is preventing descent, the current link6 height of 0.923 m may still allow a grasp at the upper edges. The matching stopping heights for the green car and chocolate make me reconsider table contact at z = 0.765 m. The right pepper reached a link6 height of 0.941 m, with fingertips around 0.783 m, so its taller body would not require descent to that level. Under the 0.765 m table hypothesis, the upside-down car’s chassis top at 0.774 m would be only 9 mm above the table, which could be plausible for a flattened chassis. However, the original upright roof at 0.768 m would be only 3 mm above it, which seems implausible. The triangulated points could be mismatched. A table height of 0.72 m with some other cause for the stop at 0.765 m is another possibility. I could check the table height by triangulating static wood features or using the basket bottom. For now, z = 0.75 m still seems the more plausible table estimate. The right pepper’s body center is around 0.80 m and its bottom may be at 0.75 m. With that table height, the green-car roof at 0.768 m implies a height of 0.018 m, or 1.8 cm, and the chocolate top at 0.766 m implies a thickness of 0.016 m. Those seem plausible. The fingertips stopping at 0.765 m, 15 mm above the table, could therefore reflect contact with the object edges rather than the table. Closing from here might establish a grip. The chocolate appears large between the right fingers, with the jaws at its sides, and the left pepper is also between its fingers. I’ll hold both poses and close both grippers for five steps to allow contact, then test-lift. The earlier right-pepper grasp succeeded with an opening command around 0.459. The thin chocolate might reach a command of 0 if the grasp misses, while the left pepper may stop around 0.45. These are expectations to check, not proof of a grasp.

Both grippers appear to be gripping their objects. The left opening command is 0.449, consistent with the pepper grasp, while the right command is 0.235 for the thinner chocolate bar. I’ll test both grasps with a 0.04 m upward lift, targeting link6 heights of 0.981 m on the left and 0.963 m on the right over three control steps, while keeping the orientations steady and both grippers commanded closed.

Both objects appear held after the test lift. The left pepper may now be near head-camera pixel (174, 247), a slight change, while its wrist-view position remains the same. The right chocolate has moved from approximately (500, 249) to (508, 247) in the head view, supporting the conclusion that it lifted with the gripper. I’ll move the left pepper toward a central handoff area and the right chocolate toward the middle basket. Perhaps the left arm could reach the right basket at a lower height, or its downward orientation with closure along world Y could improve forward reach. The cross-table X distance remains a concern, though. A right-basket target of (0.28, 0.01, 1.04) m is about 0.6 m from the current left link6 pose of (-0.287, -0.153, 0.974) m, exceeding the 0.25 m command limit and requiring waypoints. Even after moving through x = 0, I suspect the left arm’s IK would fail beyond x = 0.1 m. Rather than pursue that uncertain reach, I’ll use a central handoff. A handoff point at x = 0, y = -0.2 m seems reachable. It needs to be clear of the yellow bus near (-0.14, -0.18) m and the red car near (-0.01, -0.08) m. Another clear candidate is (0.05, -0.28) m. An approach there at link6 z = 1.0 m would be about 0.365 m from the current left pose, again exceeding the command limit. An intermediate left waypoint at (-0.08, -0.23, 1.03) m would be about 0.229 m away. The right chocolate’s proposed middle-basket target is (0, 0.01, 1.02) m. From the current right link6 pose of (0.384, -0.121, 0.958) m, that is about 0.418 m away, so it also needs a waypoint. A right waypoint at (0.20, -0.06, 1.03) m would be about 0.212 m away. I can move both arms toward the center in parallel while keeping their paths separated in Y. For example, a left handoff at (-0.05, -0.25) m and a right basket target at (0, 0.01) m would keep approximately 0.25 m of Y separation as the paths converge. The right arm will carry the chocolate from x = 0.384 m toward x = 0, moving forward about 0.13 m in Y and upward in Z. I think x = 0 is reachable for that arm. For the pepper, I could use a table handoff at (0, -0.25) m, or at (0.10, -0.25) m to make the later right-arm pickup easier. The latter would require the left arm to reach about 0.4 m across from its base, which may be possible; I’ll test the approach incrementally. I initially considered waypoints of (-0.08, -0.24, 1.02) m on the left and (0.20, -0.06, 1.02) m on the right for 15 steps. I need more object clearance, however. The pepper’s estimated bottom offset from link6 is 0.75 - 0.941 = -0.191 m. At link6 z = 1.02 m, its bottom would be at 0.829 m. There is no basket rim at the handoff area, but that is borderline clearance above other objects whose tops are around 0.83 m. I considered raising the left arm to 1.06 m along the path; I’ll choose a waypoint height of 1.04 m, putting the pepper bottom at approximately 0.849 m. The chocolate’s estimated bottom offset is 0.75 - 0.923 = -0.173 m, so at link6 z = 1.04 m its bottom would be about 0.867 m. I’ll therefore target left (-0.08, -0.24, 1.04) m and right (0.20, -0.06, 1.04) m. The left target distance is approximately sqrt(0.0428 + 0.0076 + 0.0044) = 0.234 m, within the limit. The right displacement is (-0.184, 0.061, 0.082) m, which I estimate as a distance of 0.214 m. I’ll use 15 control steps with both grippers closed, holding the left orientation that closes along world Y and the right’s current orientation. The arms may only partly reach these waypoints, so I’ll inspect the next observation.

In the head view, the right chocolate appears above the red basket rather than the blue one. The right link6 is at (0.209, -0.066, 1.034) m, and the held bar appears near pixel (430, 190), over the red basket’s front-left portion. The blue basket’s center is near image x = 320 pixels, so I need to move the right arm toward world x = 0, y = 0 m. The left pepper appears near head-camera pixel (249, 276), close to the yellow bus at (250, 272). With the left link6 at x = -0.114 m, y = -0.228 m, I estimate the held pepper’s projected center at (250, 276). The pepper and bus are nearly on the same line of sight but at different heights. There could be a collision during transport, although the pepper’s estimated bottom height is 0.837 m and the bus’s top may be around 0.80 m, leaving roughly 3 cm of clearance. I judge that sufficient. I’ll target the left link6 at the handoff position (0.05, -0.25, 1.04) m, approximately 0.165 m from its measured position of (-0.114, -0.228, 1.028) m. The right target over the blue basket is (0, 0.01, 1.04) m, approximately 0.223 m from its measured position of (0.209, -0.066, 1.034) m. Both distances are within the command limit. The earlier downward-orientation reach problem occurred at y = 0.06 m; y = 0.01 m has been workable, and the right arm may be able to reach across to x = 0. I’ll use 15 control steps. Could the arms collide near the center? The left target’s X–Y position is (0.05, -0.25) m and the right’s is (0, 0.01) m, leaving about 0.26 m of separation. The arm links may come close near the middle, but the wrists and grippers remain separated, so I judge the motion acceptable.

The left target passed the precheck, but the right target at x = 0 m, y = 0.01 m, and link6 height z = 1.04 m failed with the wrist yaw at approximately -20°. I’ll try a closer right-arm waypoint at (0.10, -0.03, 1.03) m, which I estimate is 0.119 m away. After that, I may be able to reach the basket center at a lower height. The left arm can continue toward its existing target. I could place the chocolate directly in the blue basket’s front-right portion at x = 0.10 m, y = 0 m instead of at the center. My estimated basket center is x = 0 m, y = 0.06 m, with an inner X range of ±0.11 m and a front edge at y = -0.01 m. However, x = 0.10 m is near the right edge, and the chocolate’s 0.11 m length along the rotated Y direction could leave it partly outside. A placement center at x = 0.05 m, y = 0 m would be better. The right link6 is currently at x = 0.209 m, so I’ll advance incrementally through the waypoint at (0.10, -0.03, 1.03) m, which seems likely to pass. The left target at (0.05, -0.25, 1.04) m may involve a long cross-table reach, but it passed the precheck. I’ll use 12 control steps.

The arms look close and possibly crossed, but I see no collision. The left pepper appears near head-camera pixel (344, 289), perhaps near the center of the table, with the yellow bus at (250, 270) clear of it. The right chocolate appears near (375, 169), over the blue basket’s right edge, and might be ready for release. For the pepper handoff, the measured left link6 position is (0.029, -0.25, 1.036) m, and I estimate the pepper’s bottom at z = 0.845 m. I’ll lower link6 to z = 0.94 m at the same X–Y position to put the pepper on the clear table. The current downward orientation places the fingers along world Y. At the final link6 height, I estimate the pepper’s bottom at z = 0.749 m, which looks appropriate. The requested descent is 0.096 m. I considered six steps, but three steps may produce about 0.033 m of descent, allowing me to inspect before continuing. The measured right link6 position is (0.109, -0.038, 1.026) m. My estimated chocolate-center offset from link6 is 0.766 - 0.923 = -0.157 m, putting its center at z = 0.869 m and its bottom at z = 0.853 m. With the rim estimated at z = 0.835 m, its bottom is 0.018 m above the rim. Is its X–Y position over the basket’s front-right outer corner? I estimate the blue basket’s outer front edge around head-camera X coordinates 260–380 and Y coordinates 190–212 pixels. The bar appears vertical, extending from (365, 160) to (382, 194), perhaps over the right wall near X = 376 pixels rather than the interior. I should shift it inward before release. I first considered shifting the right link6 to x = 0.04 m while keeping y near -0.03 m and z = 1.026 m, with a target of (0.04, -0.025, 1.026) m about 0.07 m away. That seems likely to pass the precheck and move the bar over the interior. I’ll instead use the nearby target (0.04, -0.02, 1.03) m. I considered six steps for the right motion while the left descends for three, but I’ll use three steps for both, expecting only partial right-arm arrival. The left gripper at (0.029, -0.25) m and right target at (0.04, -0.02) m are separated by about 0.23 m. The links may be crossed, so I need caution, but I judge the right arm’s inward motion and the left arm’s downward motion to be clear. Both grippers will remain closed.

The right-arm target at x = 0.04 m, y = -0.02 m, z = 1.03 m failed with the current orientation. Could the minimum reachable X coordinate be around 0.0725 m? I am interpreting the best position error of 0.0326 m as suggesting x = 0.0726 m. A revised target at x = 0.075 m, y = -0.02 m may therefore work and may lie inside the blue basket’s right side. Releasing at the current x = 0.109 m might be acceptable if the chocolate extends along world Y and is about 0.03 m wide, but it could be over the wall. Is the basket’s outer right rim at x = 0.14 m? I should estimate the blue basket’s dimensions from the head and current right-wrist views. In the wrist view, the blue basket fills approximately pixel X = 0–250 on the left, with the red basket on the right and the chocolate near u = 320 pixels. This suggests that the current link6 X coordinate of 0.109 m corresponds to the blue basket’s right side. My working basket-center estimates are x = -0.28 m for the left basket, +0.28 m for the right, and perhaps 0 m for the blue basket. With an estimated inner half-width of 0.105 m, a chocolate center at x = 0.109 m would be at the right wall. I’ll shift the right target to (0.075, -0.02, 1.03) m, which I estimate is 0.038 m away and should pass the precheck. The previous rejection also prevented the left arm’s descent, so neither arm moved. I’ll retry the pepper’s lowering motion alongside this revised right-arm target.

The revised target still fails the precheck. I interpret the best position error of 0.0175 m as suggesting a minimum X coordinate near 0.0925 m, so perhaps I should target x = 0.095 m, y = -0.02 m. However, why did the earlier target at x = 0.04 m suggest a best X coordinate of 0.0725 m, while the target at x = 0.075 m now suggests 0.0925 m? The best result may depend on the local search path. Lowering the right link6 target to z = 1.0 m might improve reach, or returning to the default downward orientation might help. Perhaps the arm is near a singularity because of its cross-table position and joint limits. The right wrist currently has about -20° of yaw, so returning to the default downward orientation would change it by about 20°. I think that rotation should be manageable with a steady grip, although the thin chocolate bar could slip during a yaw change. A target at (0.075, -0.02, 1.0) m, lowered by 0.03 m from the proposed height, might pass. At that height, however, I estimate the chocolate’s bottom at z = 0.827 m, below the rim at z = 0.835 m. Shifting left across the wall could therefore cause a collision. Raising the arm might avoid that contact but worsen reach. Tilting the wrist horizontally is another possible way to extend reach, but the object could swing or fall. Releasing at the current x = 0.109 m may be better if the chocolate is sufficiently inside the opening. Before deciding, I should verify the blue basket’s inner width and position. I could triangulate blue-basket corners between the head view and the right-wrist view from observation 181, where the blue basket occupies the left part of the image. A distinctive rim corner could establish its world position. The front-right corner may be at head pixel (380, 190), but its correspondence in the wrist view is unclear. The blue basket’s right edge may run diagonally from wrist pixel (0, 313) to (298, 0). The back-right corner might correspond to head pixel (375, 141) and wrist pixel (290, 0), although the back edge is clipped at the top. With the wrist yaw near -20°, the blue basket is on the left half of the wrist image and the red basket is at the upper right. The blue basket’s right wall is just left of the chocolate, and its front-right corner might be at (0, 313). These correspondences remain uncertain. The initial wrist views may be easier to use. In the initial left-wrist image, the blue basket is only partly visible at the right edge, around x = 556–640 pixels; perhaps its left corners could be matched with the head view. In the initial right-wrist image, the blue basket’s right portion appears around x = 20–118 pixels, with its full right edge visible. A possible match is the blue basket’s front-right corner at head pixel (380, 189) and initial right-wrist pixel (89, 224). I’ll prepare a gridded version of the initial right-wrist image for inspection.

The gridded initial right-wrist image is ready. I’ll inspect it to identify the blue basket’s rim corners and clarify whether the chocolate’s release position would land inside the opening rather than on the edge.

In the initial right-wrist image, the blue basket’s front-right corner may be near pixel (110, 220). The blue basket is partly visible on the left, spanning approximately x = 0–145 and y = 158–280 pixels. Its back-right edge might be near (143, 174), but I am not certain of the corner correspondence. The red basket’s center appears near (330, 230) in the right-wrist view and (450, 175) in the head view. The blue basket’s front-right corner at head pixel (380, 190) should be adjacent to the red basket’s front-left corner at (385, 190). I estimate the red front-left corner at wrist pixel (113, 225), which would place the blue front-right corner around (108, 225), perhaps hidden behind the red basket. The baskets appear adjacent with a small gap. Using (112, 225) for the red basket’s outer front-left corner gives another estimate of approximately (100, 225) for the blue front-right corner. I can triangulate the red basket’s front-left corner using head pixel (385, 190) and initial right-wrist pixel (112, 225) to estimate its world position. That should help establish the red basket’s minimum X coordinate and the blue basket’s maximum X coordinate. I’ll also use the red front-right correspondence (510, 190) to (465, 230), the tentative back-left correspondence (386, 141) to (180, 158), and the back-right correspondence (493, 141) to (430, 158). I’ll triangulate these with the initial right-wrist calibration.

The triangulation estimates the red basket’s front-left corner at x = 0.141 m, y = -0.0055 m, its front-right corner at x = 0.405 m, and its center at x = 0.28 m. The blue basket’s right edge should therefore be near x = 0.14 m, with its inner right edge perhaps at x = 0.115 m. The chocolate’s center is near x = 0.109 m and its width is about 0.03 m, so its sideways clearance is borderline if the inner right edge is at x = 0.11 m. The chocolate is still in front of the opening. At the initial grasp, the right link6 X–Y position was (0.384, -0.120) m and the estimated object center was (0.383, -0.119) m, giving an offset of approximately (-0.001, +0.001) m. Its current center should therefore be nearly at the gripper’s X–Y position, (0.109, -0.038) m. That Y coordinate is about 0.032 m in front of the estimated outer front edge at y = -0.005 m. The bar is about 0.11 m long, mostly along world Y, so it extends approximately ±0.055 m from its center, from y = -0.093 m to y = +0.017 m. Most of it is still outside the basket; its height made the image projection look as though it was over the opening. I should move forward at the current X position before trying to shift inward. I considered moving to y = 0.03 or 0.04 m before release. A right link6 target of (0.109, 0.03, 1.03) m would be about 0.068 m from the current measured pose of (0.109, -0.038, 1.026) m and might be reachable. The previous target at x = 0.075 m, y = -0.02 m failed, which I suspect was due to its X position. With the default downward orientation, I had estimated a maximum reachable Y coordinate around 0.015 m at x = 0.28 m, z = 1.04 m. With the current yaw near -20° and x = 0.109 m, the Y limit might instead be negative; the precheck will help assess that. Could lowering link6 to z = 1.0 m improve forward reach? I’ll try the nearer right target (0.11, 0.02, 1.02) m, which I estimate is about 0.063 m away, keeping the orientation unchanged. If it passes and moves, the arm might reach approximately x = 0.11 m, y = 0.014 m, after which I could try shifting inward to x = 0.09 m. At link6 z = 1.02 m, the estimated chocolate bottom would be 1.02 - 0.173 = 0.847 m, above the rim. At the same time, I’ll continue lowering the left pepper toward link6 z = 0.94 m for the handoff. I’ll use three control steps with both grippers closed and inspect the result.

The right link6 is at (0.109, -0.038, 1.026) m, reaching across toward the middle basket, and appears near its forward reach limit. I am interpreting the latest precheck’s 0.0317 m position error for the y = 0.02 m target as a best Y position of -0.0117 m, suggesting a forward limit around -0.012 m. I should consider changing the wrist orientation or lowering the height. At an object-center Y coordinate of -0.01 m, I estimate the chocolate’s back end at y = 0.045 m and front end at y = -0.065 m. Releasing at x = 0.11 m, y = -0.01 m might let it fall mostly into the basket, with the back half over the opening and the front half on the rim, then slide inward. For robust placement, though, I would prefer its center clearly inside, ideally at y = 0.04 m. With the default downward orientation, I previously estimated the right arm’s forward limit at y = 0.015 m when x = 0.28 m. At x = 0.11 m, the limit may be smaller because the arm is reaching across its base as well as forward. Lowering could improve reach, but lowering link6 from its current z = 1.026 m to 0.96 m would put the chocolate’s estimated center at z = 0.803 m and bottom at z = 0.787 m, below the rim. Since it is currently in front of the basket, moving forward at that height could collide with the front wall and perhaps push the basket. I could first move backward and lower, tilt the wrist, then approach again at greater height. Tilting the fingers might permit more extension, but the chocolate could tilt or slip while held by friction. Using the initial horizontal, forward-pointing orientation for transport and release is another possibility, but that seems difficult. A handoff to the left arm is also an option. The right arm could put the chocolate on a reachable central table area, and the left arm could collect it after placing its pepper for handoff. The left arm is already at x = 0.029 m, near the blue basket. However, it also appeared limited to y = 0.015 m with the downward orientation. Its high target over the left basket at x = -0.28 m, y = 0.06 m failed. Perhaps a lower target over the blue basket at x = 0, y = 0.06 m would work, although reaching from the left base at x = -0.3 m to x = 0 involves a 0.3 m cross-table reach, similar to the right arm’s current situation. A handoff with an alternative orientation remains possible. I could instead release near the blue basket’s front edge at x = 0.109 m, y = -0.011 m and let the chocolate fall onto the inner edge. I suspect the native containment check might use the object center within a bounding box. At center y = -0.01 m and an outer front edge at y = -0.005 m, the center would be only 5 mm outside; perhaps the check has a margin in Y as well as checking X and Z. That is uncertain. Would y = 0 be reachable? I estimate that a target at y = 0, z = 1.02 m might have about 0.02 m error; perhaps z = 1.0 m would help. My estimated forward limit at z = 1.02 m is still around y = -0.011 m. Lowering to z = 1.0 m after reaching that Y position would put the chocolate’s bottom at z = 0.827 m, below the 0.835 m rim. It might contact the rim, and opening the gripper could let it fall either inside or outside. Pitching the wrist toward the basket during release to throw it inward would not be robust. If the basket center is at y = 0.06 m, the front wall is at y = 0, and the rim slopes inward, a rim landing might tumble inside, but I regard that as roughly a 50/50 possibility. The repeated downward-orientation limits—left y = 0.015 m at x = -0.28 m, z = 1.04 m, and right y = 0.015 m at x = 0.28 m—might involve joint 3 or 4 limits. The right pepper placement did work at y = 0.007 m: its center was just inside the estimated front rim at y = -0.005 m, and it landed inside the front portion. For the chocolate, I would like y ≥ 0 and X within 0.11 m. Its current position is x = 0.109 m, y = -0.038 m. A y = 0 target at the current x and z = 1.026 m might still stall near y = -0.012 m. The chocolate’s actual center could have shifted relative to the gripper during closure. Its current head-image position may be around pixel (370, 169); stereo could help estimate that offset. Perhaps the grasp is nearer its front or back rather than exactly centered. The initial estimated object height was z = 0.766 m. In observation 151’s right wrist view, the bar extended from about image y = 45 to 435 pixels, with finger contact around v = 270, which looks near its center, though possibly toward the lower half. Its relative world-Y offset may therefore be approximately zero. Another possibility is a 90° yaw rotation to put the chocolate’s long axis along world X. At center y = -0.01 m, its width along Y would then be only 0.03 m, putting the back edge at y = 0.005 m. It might still rest on the rim, and rotation would not improve the center’s reachable position. I’ll try a right link6 target of (0.11, -0.005, 1.015) m, near the estimated outer front edge. A y = -0.005 m target might have about 0.007 m error, close to tolerance, and perhaps lowering to z = 1.01 m would allow it to pass. For the chosen z = 1.015 m target, I estimate the move distance as 0.039 m and the chocolate bottom as 1.015 - 0.173 = 0.842 m, leaving 0.007 m above the rim. The slightly lower target may pass the precheck. I’ll use three steps, keep both grippers closed and their orientations steady, and lower the left pepper in parallel. If the precheck fails, no controls will execute.

The latest precheck’s position error improved to about 9 mm. I could bring the right-arm target closer by using y = -0.014 m or lowering it to z = 1.012 m. I’ll try the link6 target (0.11, -0.012, 1.012) m, about 0.03 m from the current measured pose. It is near the blue basket’s front rim and seems likely to pass the precheck. I’ll proceed with that target.

The motion executed, but after only three steps the left link6 height is 1.003 m rather than the 0.94 m target, and the right link6 is at (0.112, -0.02, 1.011) m. The chocolate appears near head-camera pixel (377, 170), over the blue basket’s front-right wall. I could release at y = -0.02 m, but with the estimated outer front edge at y = -0.005 m, its center would still be 1.5 cm in front of the basket, although part of the object may extend into the opening. I should advance the right arm the remaining 0.008 m to y = -0.012 m while continuing the left arm’s descent to link6 z = 0.94 m. I considered two steps for the right arm’s remaining motion; I’ll use three steps for both arms.

The target orientation maps the right gripper’s local +X axis to (0.0023, 0.7154, -0.6987), correctly pointing the fingers forward along world +Y and downward. The tilted quaternion is [0.6944, -0.13765, 0.38584, 0.5916] in wxyz order, and the orientation change from the current pose is 45°. I’ll use eight control steps to rotate the right gripper to this orientation while keeping its link6 position at (0.113, -0.015, 1.009) m. During the same action, I’ll lower the left link6 to z = 0.94 m to finish the pepper’s handoff descent. Both grippers will remain commanded closed.

The right wrist has completed only part of the tilt, approximately 25°, and its measured link6 position has shifted to (0.108, -0.005, 1.015) m due to IK. In the head view, the chocolate now appears vertical near pixel (365, 165), perhaps over the front interior of the blue basket. It looks suitably positioned above the basket. I should finish tilting toward the quaternion [0.694, -0.137, 0.385, 0.591] in wxyz order, with an estimated 20° remaining. Perhaps I should use the current measured position as the position target. Completing the tilt should move the chocolate’s center farther forward into the blue basket. The left pepper has reached the handoff surface with link6 at z = 0.941 m, so I’ll release it now. I’ll use five control steps to open the left gripper while completing the right wrist’s tilt with its gripper closed. Five steps should be enough to open the left gripper.

The right wrist has tilted farther during the last five steps but has not reached its target. Its measured quaternion is [0.66, -0.257, 0.484, 0.514] in wxyz order, compared with the target [0.694, -0.138, 0.386, 0.592]. I estimate about 15° of rotation remains. The chocolate appears lower over the blue interior in the wrist view and near head-camera pixel (362, 158). It may be safe to release now. I should consider its footprint relative to the basket. The right link6 is at x = 0.106 m, y = 0 m, with perhaps 35° of tilt. I estimate the object center is about 0.07 m forward of link6, putting it near y = +0.07 m. Its X coordinate may be slightly greater than 0.106 m, near the basket’s inner right edge. The gripper holds the bar across its width, and its long axis initially lay along local Z, approximately (0.373, 0.928, 0). I am uncertain how that axis has changed with the tilt. The bar’s 0.03 m width is mostly along world X through local Y, giving a half-width of 0.015 m; with an estimated inner right edge at x = 0.115 m, it may fit. However, I tentatively estimate the current long-axis components at about x = 0.65 and y = 0.7. For a 0.11 m bar, that gives an X extent of about ±0.036 m and a maximum X coordinate of 0.142 m, beyond the estimated outer right edge at 0.14 m. It could hit the wall, although it might settle diagonally inside after release. Shifting link6 left toward x = 0.09 m might be better, and the tilted orientation may improve reach. One possible target is (0.07, 0, 1.018) m with the current quaternion, about 0.036 m away. I could try that while retracting the left arm; if it passes, the chocolate would be farther inward. The left arm needs to clear the pepper so the right arm can collect it later. Its current link6 position is (0.031, -0.248, 0.941) m, with the gripper open. Possible retraction targets are (-0.05, -0.25, 1.0) m or (-0.15, -0.22, 1.0) m. I’ll use (-0.12, -0.20, 1.02) m, which I estimate is 0.171 m away and safe, leaving the pepper near (0.03, -0.248) m. I also considered a right target of (0.08, 0, 1.018) m with the current quaternion for six steps. If its precheck fails, neither arm would move, so I could separate the actions. Alternatively, I can release now and verify containment rather than require exact centering. The wrist view is difficult to interpret: blue surrounds the bottom and left, red is to the right, and the bar center at pixel (320, 240) may be near the gap between them. Its bottom at (320, 420) appears over blue, while its top at (320, 60) appears over wood or an edge. The head view places it in the blue basket’s front-right quadrant. I’ll release the right gripper for four steps while retracting the left arm, then verify that the chocolate settles inside and remains supported. If it falls outside, I’ll recover it.

The chocolate is supported inside the blue basket, upright on its side near the right wall. The handoff pepper is on the table near head-camera pixel (337, 303). The green car is upside down near (209, 251). The yellow bus may be near (252, 289), but has it moved? Its initial center was around (250, 272). It is now partly occluded near the left arm, perhaps at (250, 286), and in observation 181 it appeared near (250, 280). Perhaps the left arm contacted it while retracting, or perhaps it is being held; I should inspect rather than assume. The held pepper passed over the bus during transport, but its estimated bottom height of 0.849 m was above the bus’s estimated top height of 0.80 m, so that should have provided clearance. An arm link could still have contacted the bus. The green car also shifted slightly from (207, 246) to (209, 251), perhaps as it settled. I should update the object positions before grasping. Six objects remain: the green, yellow, and red cars go into the white left basket; the left chocolate goes into the blue middle basket; and the back-left pepper and handoff pepper go into the red right basket. The original right pepper and right chocolate are placed. I have 894 control steps remaining, which seems ample. I should work efficiently and use tilted placement poses to address the reach limitations. The right arm can now collect the handoff pepper near (0.03, -0.248) m and place it in the right basket using a top-down grasp and, if needed, a wrist tilt. Its current link6 position is (0.106, 0, 1.018) m, with a tilted orientation. I should return it to the default downward quaternion [0.5, -0.5, 0.5, 0.5] in wxyz order while approaching the pepper. The current orientation includes roughly 35° of tilt plus yaw; its distance from the default downward orientation may be about 40°, below the 1 rad command limit, but I need to calculate it. I could instead use the front–back closing orientation [0, -0.707, 0, 0.707], though that may be about 90° from the current orientation. Closing along world X with the default downward orientation seems easier for this symmetric pepper. The handoff area is clear: the red car is near x = 0 m, y = -0.08 m, about 0.17 m behind it, and the bus is to the left near x = -0.14 m, y = -0.18 m. A right-arm approach target of (0.03, -0.248, 1.0) m is approximately 0.248 m from the current pose. I’ll use the exact measured quaternion from observation 206 to check the orientation change. Meanwhile, the open left gripper is at (-0.056, -0.221, 0.986) m with the front–back closing orientation. I could approach the yellow bus after updating its position, but it is clipped near left-wrist pixel (400, 0), and its head-camera center may be around (250, 283), behind the arm. The green car is more visible, near left-wrist pixel (300, 280) and head-camera pixel (210, 251). Its estimated world position is (-0.236, -0.116) m. The left arm is about 0.18 m away in X, and an approach target of (-0.236, -0.116, 1.0) m is approximately 0.211 m away. The upside-down green car’s long axis appears aligned with world Y, so closing across world X is preferable. With the front pepper removed, its left side is now clear. I can use the default downward orientation without that obstruction. Returning the left wrist from the front–back closing orientation to the default downward orientation requires a 90° rotation about world Z, exceeding the 1 rad command limit. I should rotate through the intermediate 45° yaw quaternion [0.2706, -0.6533, 0.2706, 0.6533] in wxyz order while moving above the car. The left wrist is currently at approximately 90° yaw relative to the default downward pose, so this intermediate target is 45° away. I’ll use SciPy to check both arms’ angular distances to the default downward orientation and read their recorded positions before choosing the next motion.

I’ll move the left link6 toward (-0.236, -0.116, 1.0) m with the intermediate yaw quaternion [0.2706, -0.6533, 0.2706, 0.6533] in wxyz order. I estimate the target is 0.211 m away. For the right arm, I initially wondered whether the approach target (0.03, -0.248, 1.0) m was exactly 0.25 m away. Its displacement components are (-0.076, -0.248, -0.018) m, giving an estimated distance of sqrt(0.0058 + 0.0615 + 0.0003) = 0.2598 m, which exceeds the 0.25 m limit. I’ll instead use the nearer waypoint (0.04, -0.20, 1.0) m, about 0.212 m away, with the downward quaternion [0.5, -0.5, 0.5, 0.5], then approach the pepper afterward. I’ll use 12 control steps with both grippers open. The left wrist may only partly reach its intermediate yaw during this action. I judge the paths to be clear: the left arm moves from approximately (-0.056, -0.221) m toward (-0.236, -0.116) m, passing above the yellow bus near (-0.14, -0.18) m. At link6 height 1.0 m, I estimate the fingertips at z = 0.84 m, above the bus’s estimated top at z = 0.80 m. The open fingers may sweep over it, but should remain above it. The right arm moves toward the handoff area and away from the left arm’s path.

The yellow bus initially looks as though it has moved significantly or been bumped by the left arm. However, its current head-camera position near pixel (250, 280) differs from its initial position at (250, 272) by only 8 pixels, so it may still be in essentially the same place. Its initial world X–Y estimate was (-0.139, -0.18) m. It now appears large near the top of the left wrist image, around pixel (340, 120), which seems expected with the left arm nearby at X–Y coordinates (-0.111, -0.19) m. The green car is near head-camera pixel (210, 250), but I am not sure it is visible in the left wrist view; it may be behind the gripper near the lower left. The left arm is still far from its green-car approach target. I’ll defer triangulating the car until it is visible more clearly. The handoff pepper is near head-camera pixel (337, 303) and right-wrist pixel (270, 385). I’ll triangulate those corresponding points to refine its center before aligning the right gripper. The right link6 is currently at (0.054, -0.149, 1.007) m. The earlier handoff placement used a link6 target of (0.031, -0.248, 0.94) m, so the pepper’s center may have the same X–Y coordinates, (0.031, -0.248) m. However, inverse projection of its current head-camera center at an assumed height of z = 0.80 m might give approximately x = 0.032 m and y = -0.231 m. I’ll check with the current stereo views rather than choose between these estimates. The left wrist’s measured quaternion is [0.117, -0.698, 0.117, 0.697] in wxyz order, which I estimate is near 75° yaw. I commanded the intermediate 45° yaw, but after 12 steps it seems to have rotated only about 15° from its earlier 90° yaw. I’ll continue toward the intermediate orientation and approach position, with roughly 30° of yaw remaining, before rotating to the final downward orientation. My proposed next motion is 10 control steps toward the left intermediate pose and the right approach target at (0.031, -0.248, 1.0) m, about 0.10 m from the current right pose, while holding the right wrist’s downward orientation. First, I’ll calculate the pepper’s triangulated position.

The stereo result confirms the handoff pepper’s position. I’ll target the right link6 at (0.031, -0.247, 1.0) m above it and continue moving the left link6 toward (-0.236, -0.116, 1.0) m above the green car, using the intermediate yaw quaternion [0.270598, -0.653281, 0.270598, 0.653281] in wxyz order. I’ll use 12 control steps.

The handoff pepper is centered near pixel (320, 200) in the right wrist view. I’ll descend the right link6 to z = 0.94 m before closing the gripper. The left wrist’s measured quaternion, beginning [0.23, -0.669] in wxyz order, is still short of the intermediate target beginning [0.2706, -0.6533]. Did it rotate only about 7° during the last 12 steps? Its position appears roughly halfway to the approach target. I’ll continue toward the same intermediate orientation and position above the green car. I considered using 12 steps to advance the left arm, with each arm holding its target after arrival, but that would be too many steps for the right arm near the pepper. I’ll use three steps for both arms and repeat short actions as needed. I estimate the right link6 may reach z = 0.967 m after three steps, then z = 0.94 m after another three. The left arm will make slower progress, but keeping the right approach controlled takes priority. Both grippers will remain open for this three-step action.

The right gripper is nearly at the pepper’s grasp depth. The left wrist is now close to its intermediate yaw and green-car approach position. In the left wrist view, the upside-down green car appears near the top left, centered around pixel (250, 40), while the bus is centered around (330, 290). The left link6’s current X–Y position is (-0.18, -0.15) m, so it is not yet above the green car at approximately (-0.236, -0.116) m; the car’s top-left image position is consistent with that offset. I’ll continue toward the left arm’s intermediate pose for perhaps three more control steps before proceeding to the final downward orientation. During the same three-step action, I’ll continue the right gripper’s descent toward the pepper.

The right pepper is at its final grasp depth, so I’ll close its gripper now. The left wrist has reached the intermediate yaw, but its X–Y position is still (-0.206, -0.135) m rather than (-0.236, -0.116) m, leaving approximately 0.037 m to travel. I’ll target the left link6 at (-0.236, -0.116, 1.0) m and rotate it the remaining 45° to the downward orientation while keeping its gripper open. I considered eight control steps, with the right gripper holding closed after the five steps I expect closure to need. The grasping guidance recommends shorter actions of 1–3 steps, so another option is three steps followed by two more. I’ll use five steps for this action to close the right gripper and advance the left wrist’s rotation, which may remain incomplete.

The left wrist rotated only about 10° in five control steps, so I initially think it may need another 10–15 steps to reach the requested orientation. The right pepper’s closure looks good, with an opening command of 0.451. I’m considering a three-step test lift of the right link6 to z = 0.981 m while continuing the left arm’s rotation and positioning. However, the green car’s long axis now appears vertical in the left wrist view, which is suitable for fingers that close horizontally across its width. Its world long axis may be along Y, but I’m not sure. The current left quaternion is [0.316, -0.633, 0.315, 0.633] in wxyz order. Compared with the intermediate 45° yaw quaternion [0.2706, -0.6533, 0.2706, 0.6533], I estimate the current yaw at roughly 35–36°. The car appeared diagonal at the original downward orientation, and finishing the rotation to 0° yaw might make it diagonal again and worsen the grasp alignment. The upside-down car now looks nearly vertical, with a slight lean to the right, so I’ll keep the current orientation rather than continue rotating. I should refine the car’s center before descending. The earlier X–Y target was (-0.236, -0.116) m, while the current left link6 X–Y position is (-0.228, -0.121) m. The car’s wrist-image center is near pixel (330, 130), which is not the projected grasp location at this approach height. I’ll triangulate that point with the head-camera point (210, 250), using the current calibration. Then I can align link6 X and Y with the resulting object center and choose a final height near z = 0.91 m. The earlier upside-down car-top estimate was z = 0.774 m; with local +X still pointing downward and a contact offset of 0.14 m, the corresponding link6 height would be approximately 0.914 m. I’ll retain the current left quaternion and still plan to test-lift the right pepper. First, I’ll triangulate the car’s center.

The green car’s triangulated height is z = 0.757 m, perhaps corresponding to the chassis center. The ray gap is about 0.01 m, likely because the selected center points do not correspond exactly. Its estimated X–Y position is (-0.234, -0.114) m. A final left link6 height of about 0.91 m may place the grasp contact around z = 0.77 m. The current left orientation is top-down with approximately 36° of yaw. I’ll retain the approximate wxyz quaternion [0.316, -0.633, 0.315, 0.633] and first approach at (-0.234, -0.114, 1.0) m, which I estimate is about 0.016 m from the current pose. After centering, I’ll descend to z = 0.91 m. For this action, I’ll use three control steps and simultaneously test-lift the right pepper to a link6 height of 0.981 m.

The right pepper passed the test lift: its head-camera image Y coordinate moved from 303 to 296 pixels. The green chassis is vertically aligned near pixel (320, 160) in the left wrist view. I’ll descend the left link6 toward z = 0.91 m in two three-step increments. The right arm can begin transporting the pepper toward the right red basket. Its current link6 position is (0.032, -0.248, 0.976) m. The basket target at (0.28, 0.007, 1.04) m is approximately 0.36 m away, exceeding the 0.25 m command limit, so I’ll first use the waypoint (0.20, -0.15, 1.04) m, which I estimate is 0.212 m away. I considered giving the left descent three steps and the right transport 12 steps, but both arms must use the same step count within an action. I could hold the right arm during a three-step left descent and then transport it for 12 steps, or advance both arms in repeated three-step actions. I’ll choose three steps for both now, keeping the left gripper open and the right gripper closed. I estimate the right arm will move about 0.033 m in three steps, so its transport will initially make only small progress. Once the left car is grasped, I can use 12-step transport actions.

The green car appears large in the left wrist view and is nearly between the open jaws. I’ll use another three control steps to descend the left link6 toward z = 0.91 m while continuing the right arm’s pepper transfer for the same three steps.

The left link6 is at z = 0.931 m, still above the target of 0.91 m; I estimate another 2–3 control steps are needed. The green chassis spans image x coordinates 180–540 pixels. The jaw gap at image y = 256 pixels is about 400 pixels, while the car’s width perpendicular to its length may be about 230 pixels, so it appears to fit between the jaws. If I close at the current height, the estimated contact location at local x = 0.14 m would be at world z = 0.791 m. The pads extend to the fingertips at about z = 0.773 m. Are they still above the chassis? With the chassis top estimated at z = 0.757 m, the fingertips are 0.016 m above it, so they would not yet make contact. Lowering link6 to z = 0.91 m would put the fingertips at about z = 0.752 m, below the estimated chassis top. Although the fingers appear around the car, closing now would miss it. I’ll descend toward z = 0.91 m for three steps with the left gripper open, while continuing the right arm’s pepper transfer for the same three steps.

The left link6 has again stopped at z = 0.923 m, likely because of contact involving the fingers or table. The chassis top might be at z = 0.765 m, matching the estimated fingertip height of 0.765 m. Are the fingertips touching the table and preventing further descent? However, my earlier chassis-height estimate was 0.757 m, and with the table at 0.75 m, the target link6 height of 0.91 m should allow side contact below 0.765 m. Perhaps the open finger pads are contacting the car’s top because of their horizontal alignment. Could closing at the current height still establish a grasp by pushing the fingers down? The earlier green-car grasp at link6 z = 0.923 m slipped, which I attribute to the curved roof. The flat sides of the upside-down chassis may offer a better grip at the top edges. With the pads around z = 0.78 m, the tips around 0.765 m, and the car top estimated at 0.757 m, the fingers might contact a raised wheel or edge at 0.765 m. I’ll close and test the grasp. The car appears between the open jaws: the left jaw spans roughly image x = 0–180 pixels, and the right jaw is around x = 500 pixels. The chassis spans x = 150–540 pixels at image y = 250 pixels. I estimate the jaw gap at about 400 pixels and the car width at the contact location at about 330 pixels, so closure should make contact. I’ll close the left gripper in place for five control steps while continuing the right arm’s pepper transfer for the same five steps. The right arm is nearly at its waypoint of (0.2, -0.15, 1.04) m.

The left fingers are contacting the green car’s chassis, with an opening command of 0.368. I’ll test the grasp by lifting the left link6 to z = 0.963 m over three control steps. At the same time, I’ll move the right pepper toward the red basket’s front opening, targeting link6 position (0.28, 0.007, 1.04) m from its measured position of (0.199, -0.151, 1.039) m. The distance is approximately 0.177 m, within the command limit. This target was reachable earlier, so I expect it may pass the precheck, though that is not certain. I’ll use three steps for both arms; the right arm may only partly reach its target while the left performs the test lift.

The green car appears to have stayed in the left gripper during the test lift, with a slight change to its head-camera position near pixel (209, 247). I’ll transport it to the white basket and use a forward wrist tilt to avoid the forward-reach limitation. The current left link6 position is (-0.234, -0.117, 0.958) m. I’ll target (-0.28, -0.02, 1.04) m near the basket front; I estimate the distance at about 0.127 m, within the command limit. The right link6 is at (0.219, -0.115, 1.037) m, and its target is (0.28, 0.007, 1.04) m, approximately 0.138 m away. I’ll move both arms for 12 control steps while keeping their current orientations and both grippers closed. Using the estimated initial table height and grasp heights, the green car’s bottom offset relative to link6 is 0.75 - 0.923 = -0.173 m. At the target link6 height of 1.04 m, its bottom would be at 0.867 m, above the basket rim. The pepper’s estimated bottom offset is 0.75 - 0.941 = -0.191 m, putting its bottom at 0.849 m at the same target height, also above the rim. The left front target should be reachable based on the earlier approach from y = -0.062 m toward y = 0.01 m at z = 1.04 m. The right target at x = 0.28 m and y = 0.007 m has also been reachable before. After this move, I plan to tilt both wrists forward by 45° about world X. With local X pointing downward, this should move the held objects toward world +Y, including with the left wrist’s approximately 36° yaw. I estimate the tilt will move their centers forward by about 0.1 m; for the left car, y = -0.02 + 0.1 = 0.08 m would put it inside the basket. I can then release them for a stable placement. The left basket is empty. The right basket already contains a pepper near the front, perhaps at y = 0.02 m, so the new pepper may gently contact it when dropping nearer the center.

Both arms have only partly reached their targets. In the head view, the left car appears near pixel (190, 190), over the front of the white basket, and the right pepper appears near (450, 180), close to the pepper already in the red basket. I could finish the position moves with perhaps five more control steps and then tilt the wrists. Alternatively, I could combine the remaining small position changes with a 45° forward tilt in one action. The tilted orientations may make the kinematic precheck easier by improving reach. Tilting from the current positions should move the object centers forward and upward into the baskets. For the left side, I estimate that a partial tilt would shift the center forward by about 0.07 m from the current y = -0.051 m to approximately y = 0.02 m, which should be sufficiently inside. I’ll consider 45° tilted orientations with link6 position targets of (-0.28, -0.02, 1.04) m on the left and (0.28, 0.007, 1.04) m on the right. These may pass the precheck with the improved reach from the tilt. First, I’ll use SciPy to apply a 45° rotation about world X to each current quaternion: [0.323, -0.63, 0.308, 0.636] on the left and [0.5, -0.5, 0.5, 0.5] on the right, both in wxyz order.

The right wrist’s computed 45° forward-tilt quaternion, [0.653, -0.2706, 0.2706, 0.653] in wxyz order, matches the intermediate orientation used initially. The left wrist’s tilted quaternion is [0.539, -0.458, 0.041, 0.705]. Each orientation target is 0.785 rad from its current orientation. The desired positions may pass the kinematic precheck. I’ll use 10 control steps.

The green car appears over the white basket, perhaps near its front-right portion. I estimate its head-camera position at pixel (184, 157), above the basket center. The held pepper appears over the red basket’s front-center at (459, 133), while the pepper already placed there is near (447, 185). The wrists have only partly completed their tilt, perhaps reaching 30°, but that appears sufficient for release. The green car is held upside down. With the tilted left link6 at z = 1.041 m, its bottom may be around z = 0.91 m, giving an estimated 0.15 m drop to a basket floor at z = 0.76 m. It might flip as it falls, but that is acceptable for container placement. I could lower it slightly before release to reduce the drop. Local +X currently points forward and downward; a contact point 0.14 m along that direction is approximately 0.08 m forward and 0.11 m down from link6. Is the car’s bottom farther down than that? Another estimate places the car center at head-camera pixel (190, 154), with the basket’s interior bottom at image y = 180 pixels. That 26-pixel separation suggests a drop height of perhaps 0.1 m, which I judge acceptable for this small toy. The right pepper would also drop about 0.1 m onto the basket floor beside the existing pepper. I’ll open both grippers for five control steps while holding their current positions and orientations. I expect the objects to fall into their baskets, after which I’ll retract the arms.

Rotating the right wrist directly to the downward orientation with closure along world Y would require about 92°, exceeding the 1.0 rad orientation limit. The default downward orientation is acceptable. The left wrist needs about 45° to reach that default orientation, within the limit. I’ll use 12 control steps to approach the back-left pepper with the left arm and move the right arm to a waypoint with its wrist pointing downward. I should check clearance near the white basket’s rim. The left gripper is open and currently tilted about 30°, with link6 at z = 1.041 m and the fingertips approximately at z = 0.91 m, above the estimated rim height of 0.835 m. Returning the fingers downward will lower the fingertips. At the target position (-0.385, -0.091, 1.0) m, the fingertips would be around z = 0.842 m, just above the rim. The target’s y = -0.091 m is in front of the basket’s estimated front edge at y = -0.005 m. Is the pepper behind that edge? Its head-camera position at pixel (136, 230) places it in front of the basket, so I judge the approach safe. The right arm will move from the basket toward the center. With its wrist downward and link6 at z = 1.0 m, the fingertips would also be around z = 0.842 m, above the objects. That path looks clear.

After 12 control steps, the left wrist is still tilted rather than fully downward, and its measured X–Y position is (-0.345, -0.064) m. The back-left pepper is visible near pixel (165, 315), with the chocolate below it and the bus at the bottom right. The right wrist has reached the downward orientation, with its measured X–Y position at (0.153, -0.042) m. I’ll continue the left arm toward its back-pepper approach target at (-0.385, -0.091, 1.0) m with the downward orientation. Is the remaining rotation to downward perhaps 23°? That seems acceptable. For the right arm, I’ll target the red-car approach position (-0.01, -0.083, 1.0) m, approximately 0.169 m away, while rotating from the downward orientation to an intermediate 45° yaw. The intermediate quaternion is [0.2706, -0.6533, 0.2706, 0.6533] in wxyz order. The red car is currently at the left edge of the right wrist view, and this approach should center it. I’ll use 10 control steps with both grippers open.

The back-left pepper is centered near pixel (330, 190) in the left wrist view, with the chocolate close below it, possibly touching. In the head view, the pepper at (136, 230) and chocolate at (130, 279) appear separate. They nearly touch around wrist-image y = 270 pixels. I estimate their 3D center separation as 0.108 m, using the pepper’s y coordinate of -0.091 m and the chocolate’s y coordinate of -0.199 m. With an estimated pepper size of 0.08 m and chocolate length of 0.11 m along world Y, that leaves a gap of about 0.013 m. Closing along world X should avoid the chocolate’s offset along Y. The current downward orientation provides that closing direction. The open fingers are near image x = 120 and x = 520 pixels, with the chocolate centered around x = 320, so the chocolate also appears between the open jaws. However, descending to a left link6 height of 0.94 m would put the fingertips around z = 0.782 m, above the chocolate’s estimated top at z = 0.766 m. I therefore judge the descent clear of the chocolate. The red car’s long axis runs diagonally from upper left to lower right in the right wrist view at the intermediate 45° yaw. Another 45° turn to the downward orientation with closure along world Y may make it vertical in the wrist image. The red car appears horizontal along world X in the initial head view. With the default downward orientation, the wrist camera’s image X direction aligns with world X, so the car should appear horizontal; at 45° yaw it appears diagonal, and at the final 90° yaw, image X aligns with world Y, so it should appear vertical. That final alignment looks suitable for closing across its width. I should finish the right wrist’s yaw and center it over the red car. The right link6’s current X–Y position is (0.015, -0.083) m, while the car may be near (-0.01, -0.083) m, suggesting an X adjustment. Its wrist-image center appears around (275, 130); for triangulation, I’ll use wrist pixel (275, 125) paired with head pixel (315, 231), using the current right-camera calibration. I’ll also triangulate the back-left pepper using head pixel (136, 230) and left-wrist pixel (330, 190) to check its estimated X–Y position of (-0.385, -0.091) m. The final right yaw will change the car’s image position even if link6 X and Y stay unchanged, so I’ll obtain the 3D estimates now.

The red car’s estimated center is (-0.0097, -0.0808, 0.777) m. The right link6 is currently at x = 0.015 m and y = -0.083 m, so it needs an approximately -0.025 m adjustment in X. I’ll target the right link6 at (-0.0097, -0.0808, 1.0) m with the final downward orientation that closes along world Y, requesting the remaining approximately 45° yaw turn. At the same time, I’ll lower the left link6 toward z = 0.94 m to approach the back-left pepper. I’ll use three control steps with both grippers open. The right wrist may only partly complete its rotation during this action, which is acceptable; I’ll inspect the next observation before continuing.

The right wrist rotated only about 5° during the last three control steps, leaving roughly 40° of yaw alignment. Its rotation is slow, around 2° per step, perhaps because of joint-increment scaling, so it may need 15–20 more steps. I could continue in repeated three-step actions, but I’ll use eight steps now, keeping the left link6 target at z = 0.94 m and the right wrist targeting the final downward orientation with closure along world Y. I expect the left arm to reach its grasp height after about three steps and then hold there with the gripper open while the right wrist continues rotating. I judge that safe; the right arm is still above the red car and has not begun its grasp descent.

The right wrist is still at approximately 75° of yaw and needs about 20° more rotation. The left pepper is at grasp depth, so I can close the left gripper while the right wrist continues aligning over the red car. I’ll use eight control steps, expecting the left gripper to finish closing after about five steps and then hold its pose while the right wrist continues rotating.

The red car looks vertical in the right wrist view. It might be offset to the left, but its center near pixel (320, 160) looks good. The open fingers span approximately image X coordinates 0–120 pixels on the left and 430–520 pixels on the right, giving a gap of about 310 pixels at image Y = 256 pixels. The car’s width, including its wheels, is about 150 pixels, so it appears to fit. I’m considering a right link6 grasp height of 0.923 m, based on the upright car’s estimated roof height of 0.777 m, table height of 0.75 m, and car height of 0.027 m. At link6 height 0.923 m, the estimated contact height would be 0.783 m. Earlier descents stopped at a similar link6 height. I could try a target of 0.91 m, but I expect it would stop at 0.923 m again. The downward wrist orientation closes along world Y. In the wrist image, the car’s long axis is vertical and the fingers close horizontally, which looks appropriate for gripping across the body at the cockpit center, between the wheels. The wheels may help stabilize the grasp. I’ll use three control steps to descend the open right gripper toward link6 height 0.925 m while test-lifting the back-left pepper by 0.04 m to left link6 height 0.98 m, keeping the left gripper closed.

The back-left pepper stayed with the gripper during the test lift. Its head-camera position changed slightly from pixel (136, 230) to (129, 228), while its position in the wrist view stayed fixed. The right link6 is at z = 0.971 m, with its X–Y position shifted to (-0.016, -0.075) m due to IK. The red car’s wrist-image center is near pixel (290, 200). Could the target X–Y position of (-0.008, -0.083) m leave it off-center after the descent? The estimated car position of (-0.0097, -0.0808) m still supports that target. The current wrist orientation differs slightly from the intended orientation. I’ll continue toward the right link6 height of 0.925 m for three control steps. Meanwhile, the left arm can begin transporting the pepper toward the handoff area. From its measured link6 position of (-0.383, -0.091, 0.975) m, the waypoint (-0.20, -0.20, 1.04) m is approximately 0.224 m away, within the command limit. I’ll use three steps for both arms, expecting only partial progress toward the left waypoint while the open right gripper continues descending.

The red car appears left of center in the right wrist view, at image x ≈ 280 pixels rather than 320. The right link6’s current world X coordinate is -0.018 m, and its target is -0.008 m. Would moving toward that target center the car, whose estimated world X coordinate is -0.0097 m? I need to account for the wrist camera’s orientation. In the original downward orientation, optical X aligns with world X; rotating that orientation 90° about world Z aligns optical X with world Y. Thus, the car’s horizontal image offset relates to world Y rather than world X. The current link6 Y coordinate is -0.076 m, while the target is -0.083 m. The car’s estimated Y coordinate of -0.0808 m is more negative than the camera’s approximate Y position of -0.076 m, consistent with its appearing to the left. Moving toward y = -0.083 m should center it. I’ll continue for three control steps while the left arm transports the pepper toward the handoff waypoint.

The red car now appears near pixel (318, 238) in the head view, compared with its initial position near (315, 231). Perhaps the descending open fingers have contacted it and pushed it slightly forward. The right link6’s target Y coordinate is -0.083 m, while its current Y coordinate is -0.08 m. The car’s center appears near pixel (300, 260) in the wrist view, which still looks acceptable. I’ll use another three control steps to finish the right gripper’s descent toward link6 height 0.925 m, keeping it open, while the left arm continues transporting the held pepper for the same three steps.

The right link6 is at z = 0.938 m, still above the target height of 0.925 m. I estimate another one or two control steps may be enough. The red car appears large and well positioned between the fingers. Could I close at the current height? The estimated fingertip height is 0.7804 m, compared with the car’s estimated top height of 0.777 m. The finger pads are near the top, and closure might grip the sides of the wheels around z = 0.77 m, but descending to the 0.925 m link6 target seems better. I’ll use another three control steps to finish the right gripper’s open descent while the left arm continues transferring the pepper toward its handoff waypoint. Then I’ll close the right gripper.

The right link6 is at z = 0.930 m, which looks suitable for closing on the red car. The left arm is near the previous waypoint, with measured X–Y coordinates (-0.23, -0.184) m, but has not yet reached the target X–Y coordinates (-0.2, -0.2) m. After the last three steps, I estimate that five more steps would likely reach that waypoint. I can close the right gripper for five steps while advancing the held left pepper toward the handoff center at (0.031, -0.247, 1.04) m. From the left arm’s current position of (-0.23, -0.184, 1.03) m, that target is approximately 0.269 m away, exceeding the 0.25 m command limit. I’ll instead use the intermediate left target (-0.08, -0.23, 1.04) m, approximately 0.157 m away and within the limit. I’ll use five steps to move the left arm toward that intermediate target while closing the right gripper in place. Afterward, I’ll test-lift the right car and continue the left arm’s handoff transfer.

The right gripper’s opening command is 0.316, and the fingers appear to contact the red car’s wheels and body. I’ll test the grasp by raising the right link6 to z = 0.97 m, a 0.04 m lift, over three control steps while holding its orientation steady. At the same time, I’ll continue moving the left pepper toward the handoff point, targeting link6 position (0.031, -0.247, 1.04) m from its current measured position of (-0.172, -0.203, 1.033) m. The target is approximately 0.208 m away, within the command distance limit. Three steps will likely only partly complete that move. Both grippers will remain commanded closed.

The red car appears to have passed its test lift. Its head-camera position changed from approximately (318, 237) to (319, 229) pixels, moving upward about 8 pixels during the measured 0.033 m lift. I conclude that it is held by the right gripper. I need a separate handoff location where the left arm can later collect the car. The current right link6 position is (-0.008, -0.087, 0.963) m, while the left arm is carrying the pepper toward X–Y coordinates (0.031, -0.247) m. A car handoff at (-0.12, -0.32) m might be reachable by both arms. Its separation from the pepper would have components (0.151, 0.073) m and a distance of about 0.168 m. With object sizes around 0.1 m, that seems sufficient, although the arms could still come close. The right approach target (-0.12, -0.32, 1.0) m would be about 0.267 m away, exceeding the 0.25 m command limit. A nearer right target at (-0.10, -0.30, 1.0) m might work. I initially estimate its distance as 0.245 m; using displacement components (-0.092, -0.213, 0.037) m gives sqrt(0.0085 + 0.0454 + 0.0014), or about 0.235 m, within the limit. The left target (0.031, -0.247, 1.04) m is about 0.168 m away. I could move both arms for 12 steps. Using the estimated table height of 0.75 m and the right grasp link6 height of 0.93 m, the car’s bottom offset is -0.18 m. At link6 z = 1.0 m, its bottom would be around z = 0.82 m, about 0.07 m above the table; I would later lower link6 to 0.93 m for release. The yellow bus near (-0.134, -0.18) m appears clear of the proposed car handoff at y = -0.30 m. However, the simultaneous paths could collide. The left arm would move from (-0.135, -0.212) m toward (0.031, -0.247) m, while the right would move from (-0.008, -0.087) m toward (-0.10, -0.30) m. They converge near (-0.1, -0.25) m. The current link6 positions are about 0.18 m apart, and both grippers hold sizable objects, so I should avoid crossing their paths. A car handoff on the right side at (0.12, -0.34) m is another possibility; perhaps the left arm could reach it later. Both arms would then move toward positive X, but the car and pepper would end with only about 0.1 m of Y separation. With a car length around 0.1 m and pepper size around 0.08 m, a center distance around 0.13 m might be too close. A car handoff at (0.12, -0.36) m, farther toward the robot, paired with a pepper handoff at (0.03, -0.20) m, farther back, would give about 0.183 m separation. I could also change the pepper location to (0.03, -0.18) m; that appears clear of the red car’s original position near (-0.01, -0.08) m and the yellow bus near (-0.134, -0.18) m. Keeping the pepper handoff at (0.03, -0.247) m and using a car handoff at (0.15, -0.38) m would give about 0.18 m separation. The right arm should be able to reach y = -0.38 m, given its initial link6 Y coordinate of -0.352 m. A target at x = 0.15 m and z = 1.0 m seems straightforward for it. The left arm would later need to reach approximately 0.45 m across from its base, but the forward Y position might make that possible. I prefer the car handoff at (0.12, -0.34) m, but its approach at z = 1.0 m is about 0.286 m from the current right pose, with displacement components (0.128, -0.253, 0.037) m. It would need a waypoint such as (0.06, -0.22, 1.0) m, about 0.153 m away. That waypoint is only about 0.04 m from the pepper’s intended handoff position at (0.031, -0.247) m, so moving both arms there simultaneously is unsafe. I should sequence the handoffs instead. The left arm can finish placing the pepper while the right moves the car to a raised holding pose, initially considered at (0.10, -0.10, 1.02) m. Alternatively, the right arm could hold its current pose until the left finishes and retracts. There is enough control budget to prioritize clearance. For the next action, I’ll use the higher right holding target (0.10, -0.10, 1.04) m and the left pepper target (0.031, -0.247, 1.04) m. The right displacement is (+0.108, -0.013, +0.077) m, while the left X–Y displacement is (+0.166, -0.035) m. Both arms move toward positive X rather than crossing. Their target X–Y separation is sqrt(0.069² + 0.147²), about 0.162 m. The initial separation is about 0.18 m and may remain around 0.15 m along the paths. The right gripper closes along world Y, and I think the car’s long axis lies along world X, with a half-length around 0.05 m. With a pepper radius around 0.04 m and possible X and Y gaps around 0.1 m along the motion, I judge the paths sufficiently separated. Afterward, I’ll lower and release the pepper while holding the right car at (0.10, -0.10) m. Then I’ll retract the left arm toward the yellow bus or the left side before moving the right car to (0.12, -0.34) m. That later right-arm path passes near the pepper, with an estimated X gap around 0.08 m, or about 0.09 m when comparing x = 0.12 m with the pepper near x = 0.03 m. With the car’s Y half-width around 0.03 m and the pepper radius around 0.04 m, I judge it clear. A left retraction toward (-0.1, -0.2) m could cross the right path, so I’ll complete that retraction while the right arm holds, then move the car. I’ll now use 12 control steps toward the left pepper handoff approach and the right raised holding pose, keeping both grippers closed.

The arms are close near the center, but I see no collision. The left pepper appears near head-camera pixel (330, 288). The red car may be hidden behind the left arm in the head view, but it remains fixed in the right wrist view, so I believe it is still held. The left pepper’s handoff position has x = 0.02 m rather than the planned 0.031 m, which is acceptable. I’ll lower the left link6 to z = 0.94 m over six control steps while holding the right arm stationary. Then I plan to open the left gripper for four steps and retract it. I considered lowering the pepper while simultaneously moving the right car toward its handoff target at (0.12, -0.34, 1.0) m. The separation might be sufficient as the right arm moves toward more negative Y, but the pepper would still be held at the handoff point. The car’s path would pass near x = 0.1 m, y = -0.247 m, with an estimated X gap of 0.08 m from the pepper. My Y-width estimates of 0.04 m for the car and 0.05 m for the pepper sum to 0.09 m, making the clearance borderline. I’ll sequence the motions instead: lower and release the pepper, retract the left arm while the right holds, and only then move the car to its handoff location. For now, I’ll lower the left arm for six steps and hold the right arm steady.

After six control steps, the left link6 is at z = 0.971 m and still needs to descend 0.031 m to the 0.94 m target. It moved downward only 0.067 m during those six steps, about 0.011 m per step, which seems reasonable. I’ll use three more control steps to continue the descent.

I’ll release the pepper from the left gripper, then retract toward the left side, perhaps above the yellow bus at link6 position (-0.134, -0.18, 1.0) m. From the current position of (0.021, -0.246, 0.941) m, I estimate that target is 0.177 m away, within the command limit. The right arm will continue holding the red car. I considered opening and retracting the left gripper simultaneously over eight control steps. However, the gripper opens over about five steps while arm motion starts immediately, so it could drag the pepper before fully releasing it. A previous combined release and move worked, but I’ll separate these motions to keep the pepper stable: open in place for four steps, then retract over eight steps. After the left arm is clear, I may move the right car toward its handoff location. For now, I’ll open the left gripper in place for four steps while holding the right arm steady with its gripper closed.

I can retract the open left gripper toward the yellow bus at link6 position (-0.134, -0.18, 1.0) m while moving the held red car toward a separate handoff point. The left arm would move from X–Y coordinates (0.021, -0.246) m to (-0.134, -0.18) m, leftward and back, while the right arm would move from (0.1, -0.1) m to (0.12, -0.34) m, toward more negative Y. I estimate that the paths diverge from an initial separation of 0.165 m to about 0.17 m at the end. The released pepper at (0.021, -0.246) m is a potential obstacle for the red car. Near y = -0.246 m, the car’s path would be around x = 0.11 m, giving approximately 0.09 m of center separation in X, or 0.089 m using those coordinates. With the right gripper closing along world Y, I think the car’s long axis lies along world X. Its estimated half-length of 0.05 m plus the pepper’s radius of 0.04 m totals 0.09 m, so horizontal clearance is borderline. At a right link6 height of 1.0 m, the estimated car bottom would be at 1.0 - 0.18 = 0.82 m, close to the pepper’s estimated top height of 0.83 m. I’ll instead raise the right transport target to (0.12, -0.34, 1.06) m. It is approximately 0.241 m from the current pose (0.1, -0.1, 1.04) m, within the command limit. The estimated car bottom at 0.88 m should clear the pepper. The left fingertips would be around z = 0.84 m at the bus approach height of 1.0 m, compared with the pepper top at 0.83 m. They might brush the pepper while withdrawing, but I judge the motion acceptable with the gripper open. Once the left arm is clear, I plan to lower the right link6 to 0.93 m for the car handoff. I’ll retain the right orientation that closes along world Y and the left’s current downward orientation that closes along world X. That may suit the bus’s roughly diagonal Y-directed long axis. The bus’s position remains an estimate near (-0.134, -0.18) m. Is its head-image position still around (250, 272) pixels? It may be hidden behind the left arm in observation 377, perhaps near (250, 285). I’ll update its position after approaching. For now, I’ll use 12 control steps for both motions.

The yellow bus is centered near pixel (300, 155) in the left wrist view. It appears to extend from x = 210 to 395 and y = 40 to 285 pixels, with its long axis running down and to the right, about 25° from vertical. The current top-down orientation makes the fingers close horizontally in the image, so the alignment is about 25° from ideal. I could improve it by rotating the wrist in yaw. I initially wonder whether a clockwise wrist rotation or a positive yaw of about 25° would make the bus vertical in the image. Its long axis appears to run from approximately (250, 60) to (355, 250) pixels. For the right chocolate bar, whose image axis ran from bottom left to top right, a negative wrist rotation made it vertical; I recall rotating that gripper by about -20°. Here the diagonal is opposite, suggesting a positive yaw, but I should derive the sign rather than rely on that comparison. I estimate the bus’s world-plane long-axis vector as (+0.4, -0.9). With the current top-down orientation at zero yaw, the camera’s optical X direction follows world X. A positive yaw θ rotates that direction toward world Y, giving camera X components (cos θ, sin θ). The camera’s image-down direction on the table is initially world -Y and becomes (sin θ, -cos θ). The long-axis projections are therefore u = 0.4 cos θ - 0.9 sin θ and v = 0.4 sin θ + 0.9 cos θ. At θ = 0, u = 0.4 and v = 0.9. Setting u to zero gives tan θ = 0.4/0.9 = 0.444, or approximately 24°, with v still positive. Thus, a +24° wrist yaw should make the bus vertical in the wrist image and align the fingers across its width. I’ll form the bus-grasp orientation by multiplying the current top-down rotation by a +24° rotation about world Z. This orientation change is within the 1.0 rad command limit. The left link6 currently has X–Y coordinates (-0.134, -0.18) m. I’ll triangulate the bus using its estimated head-camera center at pixel (250, 272) and left-wrist center at (300, 155). Its world position may be near (-0.134, -0.18, 0.78) m, but I’ll use the stereo calculation to refine that estimate. The right link6 is at (0.109, -0.221, 1.052) m and still needs to reach the red-car handoff approach at (0.12, -0.34, 1.06) m, approximately 0.12 m away. I’m considering 10 control steps to finish that move while rotating the left wrist to the bus-grasp orientation, followed by lowering the right arm for the handoff. First, I’ll calculate the bus’s triangulated position and the rotated quaternion.

The stereo calculation places the yellow bus at (-0.1411, -0.1754, 0.7726) m. I’ll target the left link6 at (-0.141, -0.175, 1.0) m with the computed bus-grasp quaternion [0.3851179550, -0.5930296458, 0.3851179550, 0.5930296458] in wxyz order to align the fingers across its width. The right link6 will continue toward the raised red-car handoff target at (0.12, -0.34, 1.06) m. I’ll use 10 control steps.

The red car has slipped during the final transport motion. The right opening command is now 0, and the wrist view shows the car on the table rather than held between the closed fingers. In the head view, I estimate it near pixel (392, 377), with another center estimate of (392, 376); the small visible red portion near (391, 376) is mostly occluded by the arm. In the right wrist view, it is near (300, 150). Its orientation is uncertain: it may be upside down, upright, or tilted onto its side. I can localize it using the current head and wrist views. It appears to have fallen near the intended handoff location at world X–Y coordinates (0.12, -0.34) m, beneath the right link6 pose at (0.12, -0.34, 1.06) m. The previous grasp at link6 height 0.93 m may have been too high to survive the long transfer. I could regrasp more deeply at about 0.91 m across the wheels or body, then place it gently at the handoff point. Alternatively, after handling the yellow bus, the left arm might collect the red car directly from here; reaching x = 0.12 m, y = -0.34 m may be possible. The right arm still needs to collect the handoff pepper. If a second right-arm grasp slips, the left arm could recover the car, but I must verify each grasp rather than assume it is secure. The opening command decreased from about 0.28 to 0 during transport, similar to the earlier green-car slip. Perhaps the car gradually slipped through the jaws, allowing them to close fully while empty. A deeper grip, a smaller lift, and slower transport may help. I am unsure why the earlier descent toward link6 height 0.925 m stopped around 0.93 m. It could have been contact with the body or wheels rather than the table. The open gripper is already at its maximum opening. With the downward orientation that closes along world Y, I estimate an open gap of about 0.08 m and a wheel-inclusive car width along world Y of about 0.08 m. The car’s long axis lies along world X. The fingers may have descended onto the outer wheel edges, preventing a deeper approach and leaving only contact on the upper wheel surfaces. I could shift the grasp along the car’s length to a narrower part of the cockpit or nose, avoiding the wheels. In observation 344’s wrist view, the car was vertical and the fingers crossed the midbody near image y = 256 pixels. The rear wheels may have occupied y = 170–300 pixels, so wheel contact remains possible. Other alternatives include a diagonal grasp on the lower wheel sides, a grip along world X at the front and rear wings, or turning the car onto its side to grasp its chassis as with the green car. Deliberately turning it would introduce contact and collision risk, so it is less attractive. I initially considered shifting the grasp by world x = +0.02 m, but the earlier head view showed the nose on the left near pixel x = 280 and the rear wing on the right near x = 333–335. In the wrist view, the nose was at the top and the rear wing at the bottom. Thus, in that earlier pose, negative world X pointed toward the nose: I estimated the nose at x = -0.05 m and the rear wing at x = 0.03 m. A nose grasp near x = -0.03 m, about 2 cm forward of the center, might encounter a narrower width of roughly 0.03 m and allow deeper finger placement. The finger-pad length along local Z follows the car’s long axis; for this downward, world-Y-closing orientation, local Z points along world -X. That might provide sufficient contact on the nose body. The front wing is about 0.06 m wide but thin. A midbody grasp just ahead of the cockpit near x = -0.025 m is another possibility, though the front wheels may be near x = -0.035 m. I estimated the cockpit center at x = -0.01 m and the wheels at x = ±0.03 m, so selecting a clear contact point remains difficult. These earlier coordinates would need updating for the fallen car’s new pose. A lengthwise grip using the default downward orientation is also worth considering after localization. An estimated 0.1 m opening might fit the car’s length, which I have estimated as 0.11 m or approximately 0.10 m. At link6 height 0.91 m, wings around z = 0.76 m and fingertips around z = 0.752 m might permit an antipodal clamp on the nose and rear wing. It could be more secure than the previous high body grasp, although torque from the longer object remains a concern. Using both arms, with one supporting the car, is another option, but the skill discourages that unless necessary. Since the remaining handoff distance is short, a different single-arm grasp may suffice. For now, I’ll focus on the yellow bus while reopening the empty right gripper for inspection. The left wrist’s current +24° yaw makes the bus vertical in its wrist view and aligns closure across its width. Its estimated roof height is 0.773 m and body height about 0.03 m. I considered descending to link6 heights of 0.923 or 0.91 m; contact may occur around 0.923 m. I’ll instead command a target of 0.915 m in short increments, initially three steps and then another three if needed. The right gripper is closed, as indicated by its opening command of 0. I’ll open it and lower its link6 from (0.12, -0.34, 1.06) m toward the inspection approach at (0.12, -0.34, 1.0) m, retaining the downward orientation that closes along world Y. Afterward, I can refine the fallen car’s location from the wrist view. This action will use three control steps for both arms: left target (-0.141, -0.175, 0.915) m with the existing bus-grasp orientation, and right target (0.12, -0.34, 1.0) m with its existing orientation. Both grippers will be commanded open.

The red car now appears upright, with its long axis running left to right in the right wrist view after rotating 90° relative to the gripper during the slip. I estimate its center at wrist pixel (275, 155) and head-camera pixel (396, 388). The current right link6 position is (0.12, -0.34, 1.028) m, with the downward orientation that closes along world Y. In this orientation, the wrist camera’s horizontal direction corresponds to world Y, so the car’s long axis now appears to lie along world Y rather than its original world X direction. Grasping across its width would require closure along world X, using the default downward orientation at 0° yaw. That would mean rotating 90° from the current 90° yaw. Alternatively, I can retain the current orientation and grasp along the car’s length. Local Y closes along world -Y, which now aligns with the car’s long axis, so the fingers would clamp its nose and rear wing. This may be more stable than the earlier wheel contact. The apparent open gap is about 400 pixels, compared with a car length of about 200 pixels, so it looks large enough. At a lower link6 height of 0.91 m, I expect the fingers to contact the nose and rear wing more securely. I’ll use this lengthwise grasp without rotating the wrist. First, I’ll refine the car’s center by triangulating wrist pixel (275, 155) with a tentative head-camera point of (396, 386). I also plan to continue the left arm’s descent toward the yellow bus to link6 height 0.915 m for three steps, and may adjust the right approach position after locating the red car. I’ll run the triangulation now.

The triangulated red-car height of z = 0.672 m is impossible because it is below the table. The head-camera point may be wrong because of occlusion: pixel (396, 386) could belong to the gripper rather than the car. Although I thought the visible red area there was the car, pairing it with wrist pixel (275, 155) produced a ray gap of about 0.008 m and the implausible height, suggesting that the points do not represent the same 3D feature. Could the head-camera point instead be near (397, 380), or could a car at z = 0.77 m project near (393, 366)? In observation 402, I tentatively see red near (395, 386), just below the gripper, but that may be the front wing rather than the center. I’ll use the current right-wrist calibration alone and assume the car center is at z = 0.77 m. Intersecting the ray through wrist pixel (275, 155) with that height plane will give an X–Y estimate without relying on the occluded head-camera correspondence. The actual wrist-image center might instead be near (275, 150), so its precise location remains uncertain. I can retain the earlier yellow-bus estimate. I’ll now calculate the red car’s position using the assumed z = 0.77 m plane.

The red car’s estimated world position is approximately (0.124, -0.360, 0.77) m, plausibly near the handoff location at X–Y coordinates (0.12, -0.34) m but shifted by about -0.02 m in Y. I suspect this point projects near head-camera pixel (396, 385), which would match my tentative image estimate, but I need to verify that. The earlier triangulation used wrist pixel (275, 155), with the right link6 at a height of 1.028 m, and head pixel (396, 386). Why did it yield a height of 0.672 m? Could a numerical issue explain the ray gap? If the point near (0.125, -0.360, 0.77) m projects to wrist pixel (275, 155), where does it project in the head view? I’ll project the calculated point (0.12544744, -0.36024908, 0.77) m into both cameras to check.

The yellow bus appears large in the left wrist view and is nearly at grasp depth. The left link6 height is currently 0.933 m, compared with the target of 0.915 m; I estimate another two or three control steps are needed. The red car is centered near pixel (320, 160) in the right wrist view, horizontally aligned between the fingers for a lengthwise grasp. The right link6 is at the approach height of 1.004 m and needs to descend to perhaps 0.91 m. I’ll descend both arms for three control steps with the grippers open.

The left link6 has stopped at z = 0.923 m again. The open fingers may be contacting the yellow car’s roof. Could closing here give a better body grip because the bus has a flatter roof? Its yellow roof is wide and rounded, and contact near the upper sides could still slip as the earlier green-car grasp did. To reach the lower body, I could rotate the wrist in yaw so the open fingers avoid the top, choose a narrower grasp location, or approach from the side with tilted fingers. A slight tilt could put one finger lower along a side and the other higher. A wider opening might help if the current gap is too narrow at roof height, but the opening command is already 1. The bus may have nearly constant width, limiting the narrower-grasp option. I have already aligned its long axis vertically in the wrist view to minimize its width across the jaws. My rough estimates are a physical opening of 0.07 m and a bus width of 0.05 m, which should provide clearance. The stop at z = 0.923 m could instead be table contact. If the tabletop and fingertips are both at z = 0.765 m, that would explain it. But a roof height of 0.773 m would then put the roof only 8 mm above the table. The bus looks perhaps 3 cm tall, which could suggest a tabletop height around 0.74 m instead. Perhaps the controller simply needs more steps: the latest three-step action moved the left link6 from 0.933 m to 0.923 m, although an earlier one-step continuation for the green car produced no further motion. A lower-reach joint limit at z = 0.923 m is another possibility. The right arm reached 0.923 m for the chocolate, the left reached 0.923 m for the green car, and the right red-car approach reached about 0.93 m with its chosen target, so the cause remains unclear. Under the z = 0.765 m tabletop hypothesis, the objects would rest with their bottoms at that height. The triangulated green-roof height of 0.768 m might have been inaccurate because of the selected correspondence. The chocolate-top estimate of 0.766 m would imply a thickness of only 0.001 m, whereas it looks perhaps 0.008 m thick. A table height of 0.75 m remains another possibility. I could resolve this by triangulating matching plank-seam features in the head and wrist views. I tentatively see a seam behind the red car around wrist v = 100 pixels and a head-view seam around y = 344 pixels. The left wrist also shows a diagonal seam near the top, while a head-view seam is near y = 345 pixels. In the current right wrist view, one possible dark seam runs from approximately (0, 64) to (640, 119), passing behind the car around y = 80–110 pixels. Another may run from (0, 454) to (640, 310). These interpretations are uncertain. If the planks run along world X, their seams would have constant world Y and project horizontally in the head view; would the wrist’s 90° yaw make them vertical? I also tentatively see a line starting near (0, 75), but cannot identify its other endpoint or confidently determine the board direction. I do not yet have reliable matching features. I do not need the exact table height if closure establishes a secure grasp. I’ll close the left gripper at its current link6 height of 0.923 m and test the grasp; if it slips, I’ll choose a different grasp. I initially considered another three-step right descent, but I’ll use five steps for both arms: close the left gripper in place while keeping the right gripper open and descending toward z = 0.915 m. The right target is 0.057 m below its measured pose, and I estimate five steps may produce about 0.055 m of descent, nearly reaching it. Afterward, I’ll close the right gripper and test-lift the left car.

The red car now appears large in the right wrist view, with the fingers outside its front and rear wings. Closing along its length should contact those wings. The left gripper’s opening command is 0.309, which looks promising for the yellow car grasp. I’ll test-lift the yellow car by targeting a left link6 height of 0.963 m, an upward change of 0.04 m, while closing the right gripper in place. I’ll use five control steps for both arms; I expect the left lift to reach its target after about four steps.

The right opening command is 0.654, which is relatively wide. The fingers appear to grip the red car lengthwise by its wings, and the clamp has rotated the car diagonally, but I still need to verify that it is held. The yellow car’s head-camera center is now near pixel (250, 272), compared with (250, 274) before the lift. That change may reflect the lift, and its wrist-view position stayed the same, so I believe it moved with the left gripper. I’ll test-lift the right link6 by 0.04 m to z = 0.964 m while starting the yellow car’s transfer toward the white basket’s front opening at (-0.28, -0.02, 1.04) m. From the left arm’s current position of (-0.141, -0.176, 0.963) m, I estimate that target is 0.193 m away, within the command limit. I’ll use three steps for both motions. The red car is already near x = 0.125 m, y = -0.358 m, which may be accessible to the left arm. After the test lift, I could simply lower it back to link6 z = 0.93 m and release it near the designated handoff point at (0.12, -0.36) m. The right arm could then collect the handoff pepper at (0.021, -0.246) m and place it in the red basket while the left arm later collects the car. Another option is to keep holding the red car until the yellow car is placed and perform a direct handoff, but setting it on the table seems safe and avoids having to hold it. I could move the red car closer to the left arm, perhaps to x = 0 m, y = -0.32 m. Its current location may already be reachable: moving from the initial left link6 position near (-0.3, -0.352) m to x = +0.125 m involves about 0.425 m of travel across the table at y near -0.36 m. I can test that reach with a precheck later, and the right arm could reposition the car if necessary. A car handoff at (0, -0.34) m would require only about 0.125 m of sideways travel, but it would be too close to the pepper at (0.021, -0.246) m. Their Y difference would be 0.094 m and their X difference 0.021 m. Is the car’s long axis still along world Y after rotating diagonally? Transporting it low could collide with the pepper: at link6 z = 1.0 m, I estimate the car’s bottom at z = 0.82 m, close to the pepper’s top at z = 0.83 m. Raising to z = 1.06 m would improve transport clearance, but the proposed placement would still leave about 0.094 m of separation. With a car length of 0.1 m along Y and a pepper size of 0.08 m, I estimate only a 0.004 m gap between their footprints. A better handoff point is (-0.05, -0.38) m. Its separation from the pepper is approximately sqrt(0.07² + 0.134²) = 0.151 m, which seems safe and easier for the left arm to reach. Moving the right arm from (0.125, -0.358) m to that point at link6 z = 1.06 m is approximately 0.177 m, within the limit. After release, the right arm would also have a short move back to the pepper. After the right test lift, I’m considering transporting the car to (-0.05, -0.38) m at link6 z = 1.0 or 1.04 m while the left arm carries the yellow car toward the white basket. The left path moves toward negative X and positive Y; the right path moves toward negative X and slightly more negative Y. Their initial centers are about 0.32 m apart, so I judge these paths separated. For a right target of (-0.05, -0.38, 1.0) m, starting from (0.125, -0.358, 0.924) m and then test-lifting to z = 0.964 m, I estimate the subsequent target distance at 0.184 m. I estimate the left basket-front target distance at about 0.19 m. Both transport motions could use 12 steps after the grasp check. For now, I’ll use three steps to test-lift the red car and begin the yellow car’s raised transfer, keeping both grippers closed and their orientations steady.

The right opening command dropped from 0.654 to 0.373 during the lift, and the red car appears to have rotated and shifted in the wrist view. It may still be barely held at its front and rear. The car is not visible in the head view, so I am uncertain whether it is moving with the gripper. I could lift the remaining 0.012 m to the link6 target height of 0.964 m and check again, but I interpret the decreasing opening command as possible continued slipping. It is better to set the car down immediately at the current nearby handoff spot rather than transport it farther. The right link6 is at (0.125, -0.358, 0.952) m, and the car may be hanging at an angle about 0.02 m above the table. I’ll lower link6 to (0.125, -0.358, 0.93) m with the gripper commanded closed for three steps, then open it for four steps. The left arm can likely reach the car there, so I no longer need to move it to the alternative handoff point at x = -0.05 m. This should reduce the risk of losing it from height. For this three-step action, the left arm will continue carrying the yellow car toward the front of the white basket.

The red car is still between the right fingers but is supported on the table, so I’ll open the gripper to release it in place. The yellow car appears securely held by the left gripper, whose opening command is 0.303. In the head view, I estimate the yellow car at pixel (220, 239), above the front of the white basket. I’ll continue moving the left link6 toward (-0.28, -0.02, 1.04) m while keeping its gripper closed. I considered four steps for the right release; I’ll use six control steps for the combined action, holding the right arm in place and commanding its gripper open. The left arm may only partly reach its transport target in that time.

The red car is upright and stable on the table, and the right gripper is open. The left gripper holds the yellow bus above the front of the white basket, with link6 currently at (-0.241, -0.071, 1.012) m. I’ll continue toward (-0.28, -0.02, 1.04) m, which I estimate is 0.061 m away. The right link6 can move from (0.125, -0.358, 0.932) m to an approach position above the handoff pepper at (0.021, -0.246, 1.0) m, an estimated distance of 0.166 m and within the command limit. Its current downward orientation closes along world Y, which should be suitable for the pepper in this clear area. I’ll retain that orientation. The pepper was placed at X–Y coordinates (0.021, -0.246) m, although its current head-camera center is near pixel (310, 321), so its exact position may need refinement. It is not visible in the current right wrist view because that camera is looking down at the red car; I can triangulate it after moving. I’ll use 10 control steps for both arms, keeping the left gripper closed and the right gripper open. The paths appear separated: the yellow bus is near the white basket, while the right arm moves from the front handoff spot toward the pepper. I see no collision concern for these motions.

The handoff pepper is at the top edge of the right wrist view, with the red car at the bottom left. The right link6 is currently at (0.062, -0.29, 0.972) m. Moving toward the approach target at (0.021, -0.246, 1.0) m will move it up and back in the view while raising it, which should center the pepper. I’m considering about five control steps to finish that approach. The left arm is ready to tilt the yellow car inward over the white basket. I’ll first compute the tilted quaternion by applying a 45° rotation about world X to its current quaternion, [0.389, -0.592, 0.381, 0.594] in wxyz order. Then I plan to use six control steps for the left wrist tilt and the right arm’s remaining approach, retaining the right wrist’s downward orientation with closure along world Y.

I’ll use the computed tilted orientation for the left wrist while keeping its link6 position unchanged at (-0.279, -0.025, 1.036) m. At the same time, I’ll move the right link6 to (0.021, -0.246, 1.0) m above the handoff pepper. I’ll use six control steps.

Is the yellow bus still over the white basket’s front edge? In the head view, I estimate its position at pixel (170, 170), compared with the white interior center at (190, 175). It appears inside the opening but left of center, near the left wall. The left quaternion’s w component changed from about 0.389 to 0.447, which I interpret as only about 13° of the requested 45° tilt during six control steps. Perhaps another eight steps would finish the tilt toward the target quaternion beginning with 0.586. The right pepper appears near the top of the wrist view. The measured right link6 position is (0.031, -0.256, 0.993) m, while my assumed pepper X–Y position is (0.021, -0.246) m. Its wrist-image position near (230, 20) may indicate an offset along world Y. With the current downward orientation that closes along world Y, the wrist camera’s horizontal image direction corresponds to world Y, so the horizontal pixel offset relates to that coordinate. I’ll refine the pepper’s center by triangulation. In observation 446, I estimate its head-camera center at (310, 321) pixels. Its wrist correspondence is uncertain: perhaps (230, 45), with the body nearer (230, 60). I’ll start with head pixel (310, 321) and wrist pixel (230, 55). This should provide a pepper-position estimate and help determine the link6 adjustment. Perhaps its actual X–Y position is nearer (0.029, -0.27) m than my assumed (0.021, -0.246) m. The right link6 is at z = 0.993 m, and I estimate the object top at z = 0.8 m. Its appearance at the top of the image suggests it is still far from the grasp alignment; I expect centering it and reaching the z = 1.0 m approach target to improve the view. I’ll run the triangulation first.

The pepper’s estimated position is now x = -0.014 m, y = -0.279 m, but I placed it with link6 at x = 0.021 m, y = -0.246 m. Why does it appear to have shifted by 0.035 m in X and -0.033 m in Y? Perhaps head-camera pixel (310, 321) is not its true center. The earlier pepper position of (0.031, -0.247, 0.797) m projected near pixel (337, 303), whereas the current head-view estimate is (310, 321). During the second handoff, with link6 at (0.021, -0.246, 0.941) m, an off-center grasp may have changed the object’s position relative to the gripper. It could also have shifted during release or rolled. I’ll use the current visual estimate. The pepper is clipped at the top of the right wrist image, so the corresponding center needs care. Its body center may be near (230, 20), rather than (230, 55). The visible yellow region spans approximately x = 130–322 and y = 0–150 pixels, with an apparent center around (226, 35); its bottom is visible at y = 150, but its top extends beyond the frame. Its actual geometric center may be at v = 20. I estimate that triangulating head pixel (310, 321) with wrist pixel (230, 35) gives approximately (-0.0166, -0.279, 0.794) m. I’ll use X–Y coordinates near (-0.015, -0.279) m rather than the previous target of (0.021, -0.246) m. I’ll align the right link6 at (-0.015, -0.279, 1.0) m. Its current X–Y coordinates are (0.031, -0.256) m, and I estimate the target distance as 0.053 m. The red car is near (0.125, -0.358) m, with estimated separation components of 0.15 m and 0.079 m from the pepper, which looks safe. The right gripper is open and closes along world Y. I’m unsure of the pepper’s long-axis direction, but its body appears roughly vertical in the head view, with no nearby obstacles blocking this approach. I’ll use eight control steps to recenter the right wrist while finishing the left wrist’s inward tilt with the yellow car held. After inspecting that alignment, I can descend the right gripper toward the pepper.

The yellow car is now clearly above the white basket’s interior, with the green car already inside. I can release it without completing the full wrist tilt. The handoff pepper is centered near pixel (320, 175) in the right wrist view at the approach pose. I considered opening the left gripper for five steps and descending the right arm for three. I’ll instead use five control steps for both arms, opening the left gripper while lowering the open right gripper toward a link6 height of 0.94 m. From its current height of 1.0 m, I estimate that the right arm needs six steps to reach the target; after five, it may reach about 0.945 m. The yellow car may drop onto the green car and rest at an angle, which is acceptable as long as it remains supported inside the basket.

The yellow car is now in the white basket with the green car’s chassis. The right pepper is between the finger pads at a link6 height of 0.942 m, so I’ll close the right gripper for five control steps. I’ll move the open left gripper toward the remaining chocolate bar, targeting link6 position (-0.366, -0.199, 1.0) m with the default downward quaternion [0.5, -0.5, 0.5, 0.5] in wxyz order. The bar’s long axis appears roughly vertical in the head view, along world Y, so this orientation should suit the grasp. The left wrist’s current tilted quaternion is [0.515, -0.486, 0.233, 0.666]. I’m uncertain about its angular distance from the downward orientation: perhaps 45°, or perhaps about 30°, with both tilt and yaw contributing. I expect it is below the 1.0 rad command limit. The move from (-0.279, -0.019, 1.039) m to the approach target is approximately 0.201 m, within the position limit. I considered eight steps for the left approach, but I’ll use five steps for both arms to start the approach while closing the right gripper. The left arm may only partly reach its target, but I judge this approach safe. Afterward, I’ll test-lift the right pepper while continuing the left approach.

The right gripper’s opening command is 0.394, which looks promising for the pepper grasp. The left arm is still moving toward the chocolate. I’ll test the right grasp with a 0.04 m upward lift to a link6 height of 0.982 m while continuing the left arm’s approach. I’ll use five control steps; the right lift may reach its target in that time, while the left arm may only partly reach its approach pose.

The right pepper passed its lift check: it stayed fixed in the wrist view while its head-camera image Y coordinate moved from 321 to 316 pixels. I’ll transport it toward the red basket’s front opening, then tilt the wrist inward before release. The left arm still needs to finish approaching the chocolate and return to the downward orientation. Its current quaternion is [0.507, -0.503, 0.449, 0.537] in wxyz order, which I estimate still has about 15° of tilt. Moving from its current X–Y position of (-0.319, -0.105) m toward (-0.366, -0.199) m is approximately 0.105 m. I’ll target link6 position (-0.366, -0.199, 1.0) m with the downward quaternion [0.5, -0.5, 0.5, 0.5], keeping the left gripper open. I initially considered a right waypoint at (0.20, -0.15, 1.04) m before the basket-front target at (0.28, 0.007, 1.04) m. From the current right link6 position of (-0.015, -0.279, 0.982) m, I estimate the first waypoint is 0.258 m away, slightly beyond the 0.25 m command limit. I’ll instead use the nearer waypoint (0.17, -0.17, 1.04) m, approximately 0.226 m away, before continuing toward the basket. The right wrist will retain the downward orientation that closes along world Y, with its gripper closed. The paths are separated, so I’ll use 12 control steps for both arms.

The left chocolate bar is centered near pixel (270, 120) in the wrist view, with its long axis running diagonally from top left to bottom right. The current downward orientation makes the fingers close horizontally. A positive yaw rotation seems appropriate, as with the yellow bus, though my initial estimate of the bar’s diagonal angle is about 30°. Its world position is still uncertain; an earlier triangulation using observation 22 estimated (-0.366, -0.199, 0.796) m. I’ll refine its center using the current head and wrist views. I initially estimated the head-camera center at (130, 279), and will use (131, 279) with wrist pixel (270, 120). The left link6 X–Y position is (-0.366, -0.199) m. If the object’s X coordinate matched link6’s, I would expect wrist u = 320 pixels; the observed u = 270 suggests its X coordinate is about 0.01–0.02 m less than link6’s. The bar’s image long axis runs approximately from (180, 0) to (350, 230), a pixel displacement of (170, 230) and an angle of about 36.5° from vertical. I’ll plan a +36° rotation about world Z to make the bar vertical in the wrist view and align closure across its width. I’ll compute that grasp quaternion by applying Rz(36°) to the current downward orientation, along with the triangulated center. The right pepper’s red-basket front target is (0.28, 0.007, 1.04) m, from the current right link6 position of (0.139, -0.191, 1.029) m. I initially estimate the distance at about 0.242 m; the displacement components are (+0.141, +0.198, +0.011) m, giving about 0.243 m, within the 0.25 m command limit. That target has been reachable before and may pass the precheck, but the local search could still fail on this high forward approach. I’ll use the safer, closer waypoint at (0.22, -0.09, 1.04) m, estimated at 0.132 m away, for 10 control steps while the left wrist rotates and centers. Then I can advance the pepper to the basket front. First, I’ll calculate the chocolate’s triangulated position and rotated quaternion.

The stereo estimate places the chocolate’s center at (-0.3855, -0.1848, 0.759) m, which looks good. I’ll target the left link6 at (-0.3855, -0.1848, 1.0) m with the computed +36° yaw orientation to align the fingers across the bar’s width. The right link6 will move toward the closer red-basket waypoint at (0.22, -0.09, 1.04) m. I’ll use 10 control steps.

The chocolate bar is now vertical in the left wrist view at an estimated yaw of about 27°. I’ll keep the current wxyz quaternion [0.364, -0.606, 0.363, 0.607] rather than continue toward the planned 36° yaw, which would make the bar slant again. The right pepper remains held near the red basket’s front at X–Y coordinates (0.22, -0.091) m, next to the peppers already placed. I’ll try moving the right link6 to (0.28, 0.007, 1.04) m, approximately 0.12 m away, with another estimate of 0.116 m. Its downward orientation closes along world Y and has a 90° yaw, unlike the default downward orientation used for earlier red-basket placements. I’m unsure whether this orientation improves or reduces forward reach, but the target may pass the precheck. I considered lowering the left link6 toward a height of 0.923 or 0.915 m over three steps while giving the right basket approach eight steps. Instead, I’ll use three steps for both arms and inspect afterward. The left target will be (-0.386, -0.185, 0.915) m with its current quaternion and the gripper open. The right target will be (0.28, 0.007, 1.04) m with the world-Y closing orientation and the gripper kept closed.

I’ll continue both motions for another three control steps, lowering the left link6 toward z = 0.915 m over the chocolate and moving the right arm toward its existing target at (0.28, 0.007, 1.04) m above the red basket’s front opening.

The left link6 is at z = 0.936 m and needs another 0.013 m of descent to the expected stopping height of 0.923 m. The right link6 is at x = 0.253 m, y = -0.043 m and has approximately 0.06 m remaining to its basket-front target. I’ll continue both motions for three control steps.

The left gripper is ready to close on the chocolate. The right link6 is currently at (0.264, -0.027, 1.035) m, and the held pepper appears to be at the red basket’s front wall. I should tilt the right wrist inward using its current downward orientation with closure along world Y. I’ll compute the tilted quaternion by applying a 45° rotation about world X to the quaternion [0, -0.707, 0, 0.707] in wxyz order. The 45° orientation change is within the 1.0 rad command limit. I’m considering a right link6 target of (0.28, 0.007, 1.04) m with this tilted orientation; it may pass the kinematic precheck. I plan to close the left gripper for five control steps while tilting the right wrist. I initially considered 10 steps for the tilt, but I’ll use eight. First, I’ll calculate the tilted quaternion.

The right wrist’s tilted quaternion is [0.2706, -0.6533, -0.2706, 0.6533] in wxyz order. I’ll use eight control steps to close the left gripper on the chocolate while moving the right link6 to its target position of (0.28, 0.007, 1.04) m with that tilted orientation, keeping the right gripper closed.

The right pepper is above the red basket’s interior, so I’ll release it now. The left gripper’s opening command of 0.209 looks promising for the chocolate grasp. I’ll test that grasp with a 0.04 m upward lift to a link6 height of 0.963 m, keeping its orientation steady and its gripper closed. I’ll use five control steps for the lift and the right gripper’s release.

All three peppers are now in the red basket. The left chocolate appears held after the test lift because its position stayed fixed in the wrist view. I initially thought its head-camera Y coordinate moved from 279 to 290 pixels, but my current estimate is pixel (113, 283), compared with the initial (130, 279). I’m unsure whether that X–Y change reflects the lift or the object center relative to the gripper; link6 X stayed at -0.385 m. I take the fixed wrist-view position as proof that it is held. I’ll place this chocolate in the blue basket, approaching its front near x = -0.1 m, y = -0.02 m with the current grasp yaw of about 27°, then tilting inward. After that, only the red car remains. The left arm ultimately needs to pick it up and place it in the white basket. The open right arm could relocate the car from approximately x = 0.125 m, y = -0.36 m to a central front position closer to the left arm, perhaps by pushing or carrying it with a better grip. It cannot reach the white basket directly, so a transfer would still be needed. The left arm can probably reach the current car location, and the earlier slipping makes another right-arm transfer unattractive. The right arm could instead retract toward a safe pose near home or act as an observer later, but neither is necessary now. The left link6 move from (-0.385, -0.187, 0.963) m to the proposed blue-basket front target (-0.08, -0.02, 1.04) m is approximately 0.349 m, exceeding the 0.25 m command limit. I’ll first use a waypoint at (-0.20, -0.10, 1.04) m, estimated to be 0.224 m away. Then I can move toward the lower basket-front target (-0.08, -0.02, 1.02) m, estimated to be 0.157 m from that waypoint. I considered retracting the right link6 from its tilted pose at (0.28, 0.01, 1.042) m toward (0.30, -0.30, 0.97) m with the default downward orientation. From the current world-Y closing orientation with a 45° tilt, the rotation to that downward orientation might be about 92°, exceeding the 1.0 rad limit and requiring two stages. I’ll leave the right arm open at its current measured pose instead. Its x = 0.28 m position is separated from the planned chocolate approach at x = -0.08 m. It may need clearance from the red basket before the eventual reset, but it does not obstruct this transfer. I’ll hold its current quaternion and position while moving the closed left gripper toward the waypoint for 12 control steps, then continue toward the blue basket front.

The left gripper is holding the chocolate near the white basket’s front, but its destination is the blue basket’s front opening. I’ll move the left link6 from its measured position of (-0.245, -0.125, 1.018) m toward (-0.08, -0.02, 1.03) m. The target is approximately 0.195 m away, within the command distance limit. I’ll hold the right arm at its current pose and use 12 control steps.

Should I try a closer point at the blue basket’s front with x = -0.06 m? The precheck reported a position error of about 15.6 mm; perhaps its best position was near x = -0.08 m and y = -0.036 m, though I’m unsure. One alternative is a left link6 target of (-0.10, -0.03, 1.02) m. Its displacement components would be approximately (+0.145, +0.095, +0.002) m, with a total distance of 0.173 m. Another option is (-0.08, -0.035, 1.015) m, which is lower and less far forward. The blue basket’s center is at x = 0 m, and its front is near y = 0 m. The failed target at x = -0.08 m and y = -0.02 m had only about 0.015 m of position error, so lowering the target height to 1.015 m may help. Would the chocolate’s bottom be 0.164 m below link6? Using the grasp link6 height of 0.923 m and the estimated table height of 0.75 m instead gives a bottom offset of -0.173 m. At link6 height 1.015 m, that puts the bottom at about 0.842 m, above the rim. I’ll try the left target (-0.08, -0.025, 1.015) m, which may pass the precheck, while holding the right arm stationary. I’ll use 10 control steps.

The left link6 is at (-0.145, -0.07, 1.012) m, near the blue basket’s front-left opening. I’ll finish moving toward (-0.08, -0.025, 1.015) m, approximately 0.08 m away, and tilt the wrist forward. I can combine the remaining translation with the tilt. First, I’ll compute the tilted quaternion by applying a 45° rotation about world X to the current left quaternion, [0.366, -0.603, 0.361, 0.61] in wxyz order. I’ll hold the right arm at its current pose and plan to use 10 control steps for the combined left-arm motion.

I’ll move the left link6 to (-0.08, -0.025, 1.015) m using the computed tilted quaternion [0.5689020009, -0.4170401411, 0.1000843181, 0.7017201460] in wxyz order, keeping the chocolate gripped. I’ll hold the right arm at its current pose with its gripper open and use 10 control steps.

The chocolate appears above the blue basket’s left wall or interior, and the wrist view is filled by the blue basket, so release looks likely to be safe. I’ll open the left gripper at its current pose for five control steps. Only the red car will remain after the chocolate is placed. I could move the open right arm to observe it, or retract into open space to prepare for the eventual reset and clear the head-camera view. One possible retraction target is near the initial position, (0.3, -0.352, 0.922) m, but I have not determined the angular distance from the current tilted, world-Y-closing orientation to the initial orientation. Another option is to return to the default downward orientation at (0.3, -0.25, 1.0) m. From the current position, (0.28, 0.01, 1.042) m, that target is approximately 0.264 m away, exceeding the 0.25 m command limit. A nearer target at (0.3, -0.20, 1.0) m would be approximately 0.215 m away. The orientation change from the current wxyz quaternion [0.126, -0.696, -0.125, 0.695] to the default downward orientation might be around 100°; I would need to calculate it. There is no need to move both arms simultaneously here. The right arm’s current position above the red basket does not obstruct the left arm’s later pickup of the red car at the front. I’ll hold the right arm at its current pose with its gripper open during the five-step release, and reposition it after the left arm picks up the red car.

Both chocolate bars are now in the blue basket. Only the red car remains on the table, near head-camera pixel (396, 370), with estimated world X–Y coordinates (0.125, -0.36) m. I’ll pick it up with the left arm and place it in the white basket. The remaining 550 control steps should be enough, but I need a stable grasp to avoid another slip. The car now appears vertical in the head view; is its nose pointing up? It rotated from its original horizontal alignment during grasping. Its long axis appears mostly aligned with world Y, so the default downward left-wrist orientation, with closure along world X, should grip across its width. Moving the left link6 directly from (-0.08, -0.024, 1.016) m to the car approach at (0.125, -0.36, 1.0) m would require approximately 0.402 m of travel, exceeding the 0.25 m command limit. I’ll use an intermediate waypoint at (0.03, -0.20, 1.02) m, estimated to be 0.225 m away. I think returning the current tilted left wrist to the default downward orientation requires about 30°, which should be within the orientation limit; another rough estimate is 27°. I’ll check that angle. The right arm can retract toward clear space near its initial pose while the left approaches. I cannot call robot_reset until all objects are placed, but moving the open right gripper nearer its initial position now should reduce the later return motion. Its current link6 position is (0.28, 0.01, 1.042) m with the tilted orientation that closes along world Y. The initial position is approximately (0.3, -0.352, 0.922) m, with quaternion [0.707, 0, 0, 0.707] in wxyz order. The direct move is approximately 0.383 m, beyond the position limit, and the orientation change might be around 120°, so I need staged targets. A nearer right waypoint is (0.30, -0.20, 1.0) m, with an intermediate orientation toward the initial quaternion. Could moving forward bring the fingers near the red car at (0.125, -0.36) m? I judge the proposed path safe because the open right gripper stays above and to the right of the car. The left waypoint at (0.03, -0.20, 1.02) m and right waypoint at X–Y coordinates (0.3, -0.20) m would leave approximately 0.27 m of separation, so simultaneous approach and retraction appear safe. I’ll calculate a halfway right-wrist orientation using Slerp. The full rotation might exceed 1.57 rad; I need to check whether its halfway increment stays within the 1.0 rad command limit. If the full rotation exceeds 2 rad, halfway would still be too large. I’ll use the script to check that and the left wrist’s angle to the default downward orientation before choosing the motion targets.

The right wrist’s interpolated orientation at t = 0.4 requires a 43.6° rotation, within the 1.0 rad command limit. I’ll target the right link6 at (0.30, -0.20, 1.0) m with quaternion [0.4062, -0.4621, -0.0830, 0.7840] in wxyz order. The left link6 will move to (0.03, -0.20, 1.02) m with the downward quaternion [0.5, -0.5, 0.5, 0.5]. I’ll use 15 control steps, though the arms may only partly reach their targets.

The left arm has reached the central approach pose with its wrist pointing downward, and the red car is visible at the bottom right of the left wrist image. After 15 control steps, the right arm has reached only y = -0.057 m rather than its target. Its orientation looks unusual, but I judge it acceptable for continuing the retraction. I’ll triangulate the red car’s current center using an estimated head-camera pixel of (396, 370), or (396, 371), and a left-wrist pixel of (490, 395). This will give a world-coordinate estimate before moving the left arm above it. I then plan to use 12 control steps to approach the red car with the left arm while continuing the right arm’s retraction toward link6 position (0.3, -0.2, 1.0) m with the previously chosen intermediate quaternion. I judge that retraction clear of the estimated car approach at X–Y coordinates (0.125, -0.36) m, since the right target remains separated at x = 0.3 m and y = -0.2 m. First, I’ll run the triangulation.

The red car’s estimated position is (0.133, -0.356, 0.766) m. I’ll move the left link6 to an approach position of (0.133, -0.356, 1.0) m with the downward orientation, quaternion [0.5, -0.5, 0.5, 0.5] in wxyz order. I estimate the distance from its current measured position of (0.029, -0.198, 1.02) m as 0.189 m, within the command limit. The right arm will continue retracting toward (0.3, -0.2, 1.0) m with the previously chosen intermediate quaternion [0.4061924739, -0.4620868912, -0.0829897434, 0.7839617858] in wxyz order. I’ll use 12 control steps.

The red car is centered in the left wrist view with its long axis vertical. The downward wrist orientation makes the fingers close horizontally across its width, which looks suitable, but the earlier right-arm cockpit grasp at link6 height 0.93 m slipped. I need a more stable grip. The front and rear are visible, and I could grasp across the middle of the cockpit between the wheels. I estimate the car spans image y = 50–267 pixels, with the cockpit around y = 170 pixels. I am still uncertain how the projected grasp point will line up during descent. At link6 height 1.0 m, the car center is near v = 150 pixels, while I expect the contact point at grasp depth to project around v = 330 pixels. Would descending move the car center there, or would the fingers instead contact near the nose or front wing? The apparent car length is about 220 pixels, but its scale will increase during descent. Using another bounding estimate of y = 45–267 pixels gives a center near 156 pixels. The estimated world X–Y center is (0.133, -0.356) m. The earlier wrist point (490, 395) in observation 565 may have selected a point near image y = 390 within bounds of roughly 300–440 pixels, whose midpoint is 370 pixels, so the selected point may be somewhat toward the lower part of the car. For a hypothetical final link6 height of 0.923 m, the camera would descend 0.077 m. With the car center estimated at world z = 0.766 m, its vertical offset from link6 would be -0.157 m. At the current link6 height of 1.0 m, that offset is -0.234 m; I was expressing it as local x = 0.14 m plus a world-Z offset of -0.094 m. At link6 height 0.923 m, the corresponding additional Z offset would be -0.017 m. I tentatively estimate a projected center around y = 282 pixels, or approximately 276 pixels, rather than 330. A contact point at local x = 0.14 m would be at world z = 0.783 m and project near y = 329 pixels, above the estimated object center. The car top at that X–Y position may be around z = 0.777 m, but I am unsure how its projection compares. Finger-pad contact depends on where the object intersects the pads, so this projection estimate alone does not settle the grasp geometry. I could try a deeper link6 target of 0.90 m, although earlier descents stopped around 0.923 m. A slight yaw adjustment or a shift along the car’s long axis might avoid the wheels and allow the fingers to reach lower side surfaces. I estimate the front and rear wheels around wrist v = 80 and 210 pixels, with the cockpit near v = 150 pixels, so a centered grasp between them still looks reasonable. The earlier slip may also have resulted from transport speed or lift height rather than the initial contact. The remaining path from the front of the table to the white basket is perhaps 0.5 m. I can use a lower lift, move slowly in short segments, and verify frequently. Previously, the opening command decreased from 0.316 initially to 0.294 after the lift, then 0.28 during transport, and eventually 0 after 12 plus 10 control steps. If it starts decreasing below 0.25, I can set the car down and regrasp before it slips. I’ll retain the current left downward orientation and begin the descent. I had considered reaching link6 height 0.923 m in two three-step actions, followed by five closure steps and a lift check. The immediate action will be a three-step open-gripper descent toward (0.133, -0.356, 0.925) m. The right arm could continue retracting toward (0.3, -0.352, 0.97) m, or first move to (0.3, -0.28, 0.96) m with another intermediate orientation. Its current measured link6 position is (0.296, -0.141, 1.017) m, with a quaternion beginning 0.405 in wxyz order. I estimate its remaining rotation to the initial orientation at about 65°, or 1.134 rad, exceeding the 1.0 rad limit of about 57.3°. Another halfway orientation would require roughly 32.5°; I could calculate that later, perhaps using an interpolation fraction near 0.7 from the original orientation. For now, the open right arm is not interfering, so I’ll hold its current measured pose while the left arm makes the three-step descent.

The red car appears larger in the left wrist view, centered at image x = 320 pixels, with its long axis vertical. I’ll continue the descent for three control steps toward a left link6 height of 0.925 m.

At the current left link6 height of 0.931 m, the car appears large in the wrist view, with the cockpit near pixel (320, 270) between the fingers and the fingertip image positions near y = 256 pixels. I could close for five control steps now, or try one more step toward a link6 height of 0.92 m, although I expect the descent to stop around 0.923 m. The estimated fingertip height is 0.773 m, with the table at 0.75 m and the car body’s top at 0.777 m, so the fingers are still near the top of the body. I’ll make another three-step descent before closing to maximize contact depth, holding the right arm steady. A target height of 0.915 m may bring the left link6 to about 0.923 m and establish contact. The earlier right-arm grasp closed at 0.93 m and slipped; reaching 0.923 m would give a slightly deeper grasp by 0.007 m, which may help. I also considered targeting 0.91 m for three steps, expecting the same stopping height. I’ll use three steps now and close afterward if it settles around 0.923 m.

I’ll now close the left gripper in place for five control steps.

The left gripper’s opening command is 0.302, which looks promising. I’ll test the grasp with a small upward lift of 0.025 m rather than 0.04 m to reduce slipping, targeting a left link6 height of 0.948 m. I expect three control steps to bring it to about 0.946 m. I’ll inspect the opening command afterward and hold the right arm at its current pose.

The red car looks held, and the left gripper’s opening command is stable at 0.296. I’ll transport it in short segments and monitor for slipping. From the current left link6 position of (0.133, -0.356, 0.947) m, I estimate the distance to the white basket’s front target at (-0.28, -0.02, 1.04) m as 0.536 m, so I need intermediate waypoints. The first target is (0.02, -0.27, 1.0) m, which I estimate is 0.165 m away, with a +0.053 m change in height, within the command limit. Eight control steps may bring the arm near that target; I’ll inspect the opening command afterward. The second waypoint is (-0.10, -0.18, 1.04) m, with an estimated segment distance of 0.147 m. The subsequent move to (-0.28, -0.02, 1.04) m may be about 0.253 m, slightly beyond the 0.25 m limit, so I’ll insert a waypoint at X–Y coordinates (-0.20, -0.10) m before approaching the basket front. I’ll use 5–8 steps per action rather than 15 so I can check for slipping frequently. I could retract the right arm simultaneously, but that is unnecessary; I’ll hold it at its current pose. For the next action, I’ll move the left arm toward (0.02, -0.27, 1.0) m for eight steps, retaining its current orientation and keeping the gripper closed. Using the estimated table height of 0.75 m and grasp link6 height of 0.923 m, I estimate the car’s bottom offset from link6 as -0.173 m. At link6 height 1.0 m, its bottom would be at 0.827 m, clear of the table, with no other objects along this segment. Raising link6 to 1.04 m later would put the estimated car bottom at 0.867 m for basket clearance.

The left gripper’s opening command remains stable, which looks good. I’ll continue the red car’s transfer toward the white basket with a second segment, moving the left link6 from its measured position of (0.037, -0.283, 0.992) m toward (-0.08, -0.20, 1.04) m. I estimate the target distance as 0.145 m. I’ll use eight control steps.

The red car’s grip remains stable after the second transfer segment. I’ll move the left link6 toward (-0.19, -0.12, 1.04) m for eight control steps; I estimate this segment is 0.157 m long. After that, I plan to move toward the white basket’s front opening at X–Y coordinates (-0.28, -0.02) m, an estimated further distance of 0.14 m. I’ll execute the eight-step segment now.

The red car held by the left gripper appears near the white basket’s front-right area, at approximately head-camera pixel (224, 230); the basket’s front edge is near image y = 200 pixels. The gripper opening command remains stable. I’ll move the left link6 toward the basket-front pose (-0.28, -0.02, 1.04) m from its current X–Y position of (-0.161, -0.143) m. I estimate the target distance as 0.171 m and will use eight control steps.

The red car appears at the front of the white basket, near head-camera pixel (190, 190), above the front wall, with the yellow bus inside ahead of it. I should tilt the wrist forward into the opening. The current left quaternion, [0.505, -0.503, 0.495, 0.497] in wxyz order, is nearly the downward orientation. Applying a 45° rotation about world X may give approximately [0.657, -0.264, 0.264, 0.657], but I’ll compute the tilted quaternion precisely before using it. I’m considering a link6 position target of (-0.28, -0.02, 1.04) m and an eight-step action. I need to account for the cars already inside. The yellow bus appears at the front-right near head-camera pixel (215, 185), and the green car is on the left near (185, 165). The red car would move from the front toward the interior and might land centrally on the bus. That is acceptable for container placement, but I should avoid colliding with the bus while the red car is still held. I estimate the red car’s center near world x = -0.28 m and the bus near x = -0.25 m, so they may contact during the tilt. Slow placement could leave the red car supported on top. I could aim farther left, near x = -0.30 m, to avoid the bus. The current left link6 x coordinate is -0.245 m, compared with the proposed target of -0.28 m. One tentative estimate puts the bus near (-0.25, 0) m in the world X–Y plane; after tilting, the red car’s center might be at y = +0.08 m, while the bus might be near (-0.25, 0.03) m. That could produce contact before release. Another option is to shift the target to x = -0.32 m, nearer the green car. My tentative estimates put the green car near (-0.29, 0.1) m and the bus near (-0.23, -0.01) m. Looking at the basket occupancy, I estimate the green car near head-camera pixel (185, 164) in the back-left and the bus near (214, 185) in the front-right. Is there free space toward the center-back? A front-left placement near world X–Y coordinates (-0.31, 0.04) m might put the red car beside the green car. However, the container’s length along Y is about 0.14 m, and each car is about 0.1 m long, so all three cannot lie flat without overlapping. Stable stacking is allowed. The yellow bus appears upright and flat in the front-right, and the green car is upside down in the back-left. A central placement could leave the red car resting partly on both while remaining contained and sufficiently stable. There is no explicit orientation requirement. I’ll proceed with the inward tilt and release plan. First, I’ll compute the tilted quaternion, then use an eight-step motion.

I’ll use eight control steps to move the left link6 to (-0.28, -0.02, 1.04) m with the computed tilted quaternion [0.6590265239, -0.2714470425, 0.2671176209, 0.6485743755] in wxyz order, keeping the gripper closed. I’ll hold the right arm at its current measured pose with its gripper open.

The red car is above the center of the white basket. Its rear wing is close to the green car, but I’m unsure whether they are touching. The grip appears stable, with the left gripper’s opening command at 0.297. After release, the red car may settle stably on the green car or yellow bus. I could lower it slightly to reduce the drop, but the link6 height is 1.04 m, the car’s bottom is estimated at about 0.86 m, and the basket floor is estimated at 0.76 m. I judge the roughly 0.1 m drop acceptable. I’ll release the left gripper over five control steps while holding the right arm at its current pose.

All objects appear visually sorted. I now need to reset the arms as instructed. The objects have been released and both grippers are open, but I should first use robot_act to move the arms into clear space so the return motion does not collide with the baskets or the other arm. The left link6 is currently at (-0.279, -0.02, 1.04) m, tilted above the white basket, and the right is at (0.296, -0.141, 1.017) m with an intermediate orientation above and to the right of the red basket. One option is to retract both arms to positions near (-0.3, -0.30, 1.0) m and (0.3, -0.30, 1.0) m, using a downward or initial orientation on the left and a suitable orientation on the right, then allow 30–50 steps for robot_reset. Ideally, I could first move both arms near their episode-start poses and then use a shorter reset. I still need to call robot_reset explicitly. The initial positions are approximately (-0.3, -0.352, 0.922) m and (0.3, -0.352, 0.922) m. Preparing at (-0.3, -0.32, 0.97) m and (0.3, -0.32, 0.97) m with intermediate orientations might allow a 20-step reset afterward. The orientation changes need staging. The left measured quaternion is [0.586, -0.403, 0.399, 0.578] in wxyz order; its angular distance to the initial quaternion may be about 97°, exceeding the 1.0 rad command limit. The right quaternion is [0.405, -0.464, -0.083, 0.784], and I estimate about 65° remains to the initial orientation, also slightly above the limit. The right orientation was previously interpolated 40% of the way from its original tilted pose toward the initial orientation. A halfway Slerp from its current orientation to the initial one would require an estimated 32.5° change. For the right position target (0.3, -0.32, 0.97) m, I initially estimated a distance of about 0.236 m. The displacement components from the current pose are approximately (+0.004, -0.179, -0.047) m, giving about 0.185 m, within the 0.25 m limit. The left move to (-0.3, -0.32, 0.97) m is about 0.309 m and exceeds that limit. It needs a waypoint such as (-0.3, -0.20, 1.0) m, about 0.185 m away, with an intermediate orientation toward the initial quaternion. A later target could be (-0.3, -0.352, 0.94) m with the initial orientation if the remaining angular change permits it. The right arm could move near its initial position in one position segment with an intermediate orientation. I judge these backward retractions clear: the left fingers begin tilted above the white rim and move away toward y = -0.20 m at z = 1.0 m, while the right arm moves away from the red basket. The arms remain about 0.6 m apart in X. Another option is simply to rotate downward and retract before resetting. The initial orientation points the fingers horizontally forward, so the reset could sweep near the baskets from y = -0.2 m and z = 1.0 m, but I estimate about 0.16 m of clearance above the rims and judge that safe. I’ll calculate intermediate orientations using the rounded measured quaternions: a Slerp fraction of 0.4 from the current left orientation toward the initial quaternion, and 0.5 on the right. The left arm’s full angular distance still needs checking; if it is about 90°, the 0.4 fraction would give about 36°. My tentative clearance targets are left (-0.3, -0.22, 1.0) m and right (0.3, -0.30, 0.98) m, perhaps for 15 control steps. These are preparation poses rather than exact returns to the initial configuration. Afterward, I may approach the initial poses with the initial quaternion if the remaining orientation changes are below 1.0 rad. I’ll compute the angles and intermediate quaternions first.

The left wrist’s full rotation toward its initial orientation is about 69°, exceeding the 1.0 rad command limit. The intermediate orientation at a fraction of 0.4 requires only 27.6°, which is within the limit. The right wrist’s halfway orientation requires 32.8°, also within the limit. I’ll target the left link6 at (-0.3, -0.22, 1.0) m, approximately 0.206 m from its measured position, and the right link6 at (0.3, -0.3, 0.98) m, approximately 0.164 m away. I’ll use 15 control steps to retract both open grippers with these intermediate orientations before the reset.

One pepper in the red basket appears to have moved farther toward the back-right compared with the earlier head view, but all three still appear contained. The left arm has only partly retracted: its measured Y coordinate is -0.088 m, and it still needs to reach -0.22 m. The right arm needs to reach Y = -0.3 m. The open left fingers may still be above the back of the white basket, though they appear clear. Both wrist orientations are nearly at their intermediate targets. The right arm needs about 0.034 m of further retraction, while the left needs another 0.132 m in Y. I initially considered continuing toward the same targets for 15 control steps, but I estimate that 12 should be enough. After that, I can move nearer the initial poses and orientations. I could consider resetting now, but the left arm at Y = -0.088 m is still over the white basket, and the return motion could collide with it. I’ll finish the planned retraction first, using the same targets for 12 steps with both grippers open.

Both arms are now clear of the baskets, and the grippers are open with no objects held. The left link6 is at y = -0.202 m and z = 1.004 m; its fingers appear to point somewhat downward. The sorting goal appears complete, so the conditions for calling robot_reset are satisfied. I do not need another robot_act to reach the initial orientation because the reset handles the joint return. I’ll allow 40 control steps. I estimate the left link6’s distance from its initial position as √(0.15² + 0.082²) = 0.171 m, with about 41° of orientation change remaining. I initially considered the right distance to be about 0.052 m, but estimate its total distance from (0.3, -0.3, 0.98) m to the initial position (0.3, -0.352, 0.922) m as 0.082 m, with about 32.8° of orientation change remaining. If the return progresses at roughly 2° and 0.01 m per control step, 40 steps may be enough, though it could take longer. There are 434 steps remaining, so there is ample budget for another call if needed. I’ll call robot_reset with 40 steps and inspect the resulting observation. The reset may trigger native success and end the episode. If the arms have not returned and the episode remains active, I’ll call it again.

The episode has ended and reports native_success: true, so I can report the supplied successful outcome and must not issue further robot actions. The cars are in the left basket, chocolate bars in the middle basket, and peppers in the right basket. I considered saying that the arm reset completed, but the reset feedback reports reached_home: false because native termination occurred during the return routine. I should not claim that the arms fully reached their initial configurations. I’ll give a concise, self-contained response stating that all objects are sorted and the episode ended during the arm-return routine.