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.
npx skills add SummerEngine/summer-engine-agent --skill retargetgit clone --depth 1 https://github.com/SummerEngine/summer-engine-agentWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/summerengine/summer-engine-agent/retarget)<a href="https://agentmods.dev/skills/summerengine/summer-engine-agent/retarget"><img src="https://agentmods.dev/badge/skills/summerengine/summer-engine-agent/retarget.svg" alt="Measured on agentmods" height="20"></a>- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00062 | $0.02597 |
| Opus 5 | $0.00031 | $0.01299 |
| Sonnet 5 | $0.00012 | $0.00519 |
| Haiku 4.5 | $0.00006 | $0.00260 |
Grade A, and why
retarget 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 8d 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.
How it starts
The opening of the file, as written. The whole thing — 221 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Retarget Motion — One Library, Many Characters
There is no retarget MCP tool. Read this before promising one.
Summer ships no summer_retarget_motion tool, and no other MCP tool that
re-projects an existing animation asset onto a second rig. Verify it yourself:
grep -rn 'summer_' tools/summer-cli/src/mcp/tools/*.ts lists every registered
tool and there is no retarget entry. Never call one — the MCP server rejects
unknown tool names outright, and inventing a cost table for it ("$0.05 a clip")
is worse than saying nothing.
Two real paths exist. Pick by whether the target rig is Meshy-rigged.
| Situation | Path |
|---|---|
| Target is Meshy-rigged and the clip name is on the curated list | Re-run summer_generate_motion against the target's rigAssetId. Same clip, ~$0.10, ~30s. |
| Target is not Meshy-rigged, or the clip is hand-authored / Mixamo / bought | In-engine retargeting: BoneMap + SkeletonProfileHumanoid + RetargetModifier3D. No credits, no network, but you configure the bone mapping. |
The rest of this skill covers both. The cost math that used to live here assumed a retarget API that does not exist; the honest math is below.
When to use this skill
- "I bought (or generated) one animation library — apply all clips to my five enemies."
- "Goblin and orc have the same combat moves — share the library."
- "I have 30 NPCs with the same idle / walk / talk loop."
- The user generated motion on character A and now needs it on character B.
When NOT to use this skill
- The user wants ONE new clip on ONE character — just call
summer:animation/generate-motion. - The user wants to retime, edit, or layer the animation — that's
summer:animation/animation-treeand thesummer:animation/procedural-animationadditive layers. - Target is a quadruped or non-humanoid (wings-only, mech, blob). The curated Meshy
library is humanoid-only and
SkeletonProfileHumanoidis a humanoid profile. Hand-author instead.
Path A — regenerate on the target rig (Meshy-rigged targets)
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.
- 8d ago First seen · 221 lines · 62 tokens per session scan A 005d10a7afae
retarget is a skill published in the GitHub repository SummerEngine/summer-engine-agent (57 stars, last pushed 4d ago), licensed MIT. It adds 62 tokens to every session and 2,597 once invoked, about $0.0003 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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