yam-motion-planner

yam-motion-planner is a skill for Claude Code, Codex from NVlabs/ASPIRE. It costs 42 tokens per session (591 once invoked), scanned A, original, Apache-2.0.

Guidance for diagnosing and improving YAM robot arm motion plans made with cuRobo, a motion-planning system. It accounts for differences between an ideal simulated start and the robot's actual position and surroundings.

In plain words
What is it for?
Use it for inverse-kinematics or path-planning failures, waypoint robustness tests, no-motion versus real-run mismatches, and recovery after a failed motion plan.
Why use it?
A plan can pass before movement but fail during a real run because the robot pose, gripper load, or scene differs slightly. The guidance tests nearby targets and waypoints for more reliable execution.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

Good fit Use it for inverse-kinematics or path-planning failures, waypoint robustness tests, no-motion versus real-run mismatches, and recovery after a failed motion plan.

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Install with agentmods
npx agentmods add skills/nvlabs/aspire/yam-motion-planner
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add NVlabs/ASPIRE --skill yam-motion-planner
Clone the repo
git clone --depth 1 https://github.com/NVlabs/ASPIRE

Made for: Claude Code, Codex.

Wrote this? Show the measurements

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agentmods badge for yam-motion-planner

README.md
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Your own site
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Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for yam-motion-planner

Your own site · 80×15
<a href="https://agentmods.dev/skills/nvlabs/aspire/yam-motion-planner"><img src="https://agentmods.dev/badge/skills/nvlabs/aspire/yam-motion-planner.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 591 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00042 $0.00591
Opus 5 $0.00021 $0.00296
Sonnet 5 $0.00008 $0.00118
Haiku 4.5 $0.00004 $0.00059

Measured 11d ago against content hash 344f09631981, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

yam-motion-planner scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

aspire/real/.agents/skills/yam-motion-planner/SKILL.md · 53 lines

What it actually says

YAM Motion Planner

cuRobo is sensitive to the real start state. A no-motion/pre-motion plan can pass, then a real run can fail because physical execution replans from the actual EEF pose, joint state, gripper load, or a slightly different scene pose.

When cuRobo fails:

  1. Inspect the current scene, robot state, failed target pose, and failed stage.
  2. Decide whether the target is physically unreasonable or just planner-sensitive.
  3. If the motion is feasible, do not treat one IK/path failure as final.
  4. Try nearby target offsets and extra waypoints that make the same task easier: retreat lanes, lift-before-shift, shift-before-approach, lower/higher staging poses, or less extreme rack/bin/place coordinates.
  5. Preview from the current robot state, not only from an ideal scripted state.
  6. Prefer waypoint sets that pass perturbation sweeps, not just one clean pass.

Robustness sweep pattern:

  • Perturb candidate waypoints and final targets by small XYZ/RPY offsets that represent likely real-world variance.
  • Include start-state sensitivity when possible: preview from the current arm posture, or rerun previews after moving to the actual preceding waypoint.
  • Record pass/fail rate, first failed stage, pose, and planner error in logs/<run>/plans/.
  • Pick the candidate with high pass rate, clear margins from obstacles, and simple task semantics.

Useful sweep examples:

  • legacy_codes/kitkat_trash_waypoint_robustness_sweep.py
  • legacy_codes/kitkat_handover_clearance_waypoint_sweep.py
  • legacy_codes/bottle_rack_waypoint_robustness_sweep.py
  • legacy_codes/bottle_fixed_pour_waypoint_robustness_sweep.py

Typical useful perturbations:

  • placement/drop targets: x,y,z +/- 2-5 cm
  • staging/retreat waypoints: x,y,z +/- 3-8 cm
  • orientation: yaw/roll/pitch variants near the intended gripper axis
  • approach order: split compound moves into one-axis waypoints

If a real run stops after a cuRobo failure while holding an object, first reason from the current scene. If the object is still safely held, plan a held-object recovery from the current EEF pose: preview nearby rack/bin/table targets, add intermediate waypoints, release, retreat, then home/open. Ask the human to reset only if the scene is physically broken or unsafe for the robot to fix.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 11d ago First seen · 53 lines · 42 tokens per session scan A 344f09631981

Subscribe to this mod's changes

yam-motion-planner is a skill published in the GitHub repository NVlabs/ASPIRE (143 stars, last pushed 9d ago), licensed Apache-2.0. It adds 42 tokens to every session and 591 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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