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 OutlineDriven/odin-claude-plugin --skill post-change-check-gategit clone --depth 1 https://github.com/OutlineDriven/odin-claude-pluginWrote 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/outlinedriven/odin-claude-plugin/post-change-check-gate)<a href="https://agentmods.dev/skills/outlinedriven/odin-claude-plugin/post-change-check-gate"><img src="https://agentmods.dev/badge/skills/outlinedriven/odin-claude-plugin/post-change-check-gate/github.svg" alt="Measured on agentmods" height="20"></a>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.
<a href="https://agentmods.dev/skills/outlinedriven/odin-claude-plugin/post-change-check-gate"><img src="https://agentmods.dev/badge/skills/outlinedriven/odin-claude-plugin/post-change-check-gate.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00043 | $0.00670 |
| Opus 5 | $0.00022 | $0.00335 |
| Sonnet 5 | $0.00009 | $0.00134 |
| Haiku 4.5 | $0.00004 | $0.00067 |
Grade A, and why
post-change-check-gate 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.
How it starts
The opening of the file, as written. The whole thing — 38 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Post change check gate
Contract
| Field | Bound contract |
|---|---|
| Trigger | Right after creating or changing an artifact/skill, before calling it done, committing, or handing off |
| Authority | Reversible local: writes only the named artifact; rollback is revert to pre-check state. No remote mutation. |
| Side effect | Applies findings to the artifact, or defers each with a stated reason; never touches git |
| Done | Relevant checks actually ran (not eyeballed); artifact changed or every skipped check has a stated reason |
Inputs
artifact_path(required): path to the changed artifact or skillcheck_results(optional): outputs from any checks already run; if absent, checks are run inline
Procedure
- Run checks inline. Do not accept "looks fine" or "eyeballed" as proof. For each applicable hygiene concern (lint, type, test, format, link, security scan, or domain-specific validation), invoke the check and capture its concrete pass/fail/skip output. Done when: every applicable check is invoked with concrete output captured.
- Log every result. Record pass, fail, or skip with the specific check name and a one-line reason for skip. Done when: every check result is logged with name and outcome.
- Apply fixes only to the artifact. When a check fails, edit the artifact to fix the finding. Do not edit unrelated files. Done when: every failed check's finding is fixed in the artifact or deferred with a reason.
- Record skip reasons. If a check is skipped, write the reason explicitly into the check log before proceeding. Done when: every skipped check has an explicit reason in the log.
- Verify the check set passes. Re-run checks until all relevant checks pass or every skip is documented. If a check cannot be made to pass, stop and leave the artifact in a documented deferred state; do not commit or hand off a dirty artifact. Done when: all relevant checks pass or every skip is documented and the artifact is in a clean or documented-deferred state.
What ships with it
1 file 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.
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 Changed · -10 tokens per session 905b83d0a9f3
- 6d ago First seen · 38 lines · 53 tokens per session scan A f0f93467ba98
post-change-check-gate is a skill published in the GitHub repository OutlineDriven/odin-claude-plugin (35 stars, last pushed yesterday), licensed Apache-2.0. It adds 43 tokens to every session and 670 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 2026-09-04.
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