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 agentmods add skills/jordangunn/nunchuck/plan-execnpx skills add JordanGunn/nunchuck --skill plan-execgit clone --depth 1 https://github.com/JordanGunn/nunchuckWrote 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/jordangunn/nunchuck/plan-exec)<a href="https://agentmods.dev/skills/jordangunn/nunchuck/plan-exec"><img src="https://agentmods.dev/badge/skills/jordangunn/nunchuck/plan-exec.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00033 | $0.00250 |
| Opus 5 | $0.00016 | $0.00125 |
| Sonnet 5 | $0.00007 | $0.00050 |
| Haiku 4.5 | $0.00003 | $0.00025 |
Grade A, and why
plan-exec 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 4d 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.
What it actually says
INSTRUCTIONS
- Refer to
metadata.references.
What ships with it
18 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- assets/plan-archive-receipt-schema.json 1.1 KB
- assets/plan-root-schema.json 1.8 KB
- assets/plan-subplan-schema.json 1.4 KB
- assets/plan-task-schema.json 3.0 KB
- references/00_ROUTER.md 528 B
- references/01_SUMMARY.md 476 B
- references/02_TRIGGERS.md 543 B
- references/03_ALWAYS.md 393 B
- references/04_NEVER.md 268 B
- references/05_PROCEDURE.md 989 B
- references/06_FAILURES.md 506 B
- references/07_INSTRUCTIONS.md 1.4 KB
- references/08_PROCEDURE.md 185 B
- references/09_PROCEDURE.md 1.8 KB
- scripts/include/plan_exec_cli.py 2.8 KB runs code
- scripts/include/plan_exec_parse.py 15 KB runs code
- scripts/skill.ps1 1.7 KB runs code
- scripts/skill.sh 1.5 KB runs code
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.
- 4d ago First seen · 40 lines · 33 tokens per session scan A 6fed022a3d36
plan-exec is a skill published in the GitHub repository JordanGunn/nunchuck (9 stars, last pushed 7mo ago), licensed MIT. It adds 33 tokens to every session and 250 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 2026-08-31.
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