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pact-check

pact-check is a skill for Claude Code from jonathanmr22/pact. It costs 9 tokens per session (284 once invoked), scanned A, original, MIT.

A checklist-based review of recent code changes against a project's architecture, documentation, caches, package knowledge, and app lifecycle.

In plain words
What is it for?
Use it after making changes to classify findings as passed, stale, unchecked, or a rule violation.
Why use it?
It catches stale documentation, missed dependencies, unverified packages, and other problems that may be overlooked during implementation.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter.

Part of the pact plugin — 5 skills, 3 agents shipped together

not rated 16repo +1 4mo ago A scan 9 tokens original MIT

Good fit Use it after making changes to classify findings as passed, stale, unchecked, or a rule violation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jonathanmr22/pact/pact-check
View source ↗ jonathanmr22/pact
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 jonathanmr22/pact --skill pact-check
Clone the repo
git clone --depth 1 https://github.com/jonathanmr22/pact

Made for: Claude Code.

Or install pact, the plugin that ships this one along with the rest of its 5 skills, 3 agents.

Wrote 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.

agentmods badge for pact-check

README.md
[![agentmods](https://agentmods.dev/badge/skills/jonathanmr22/pact/pact-check/github.svg)](https://agentmods.dev/skills/jonathanmr22/pact/pact-check)
Your own site
<a href="https://agentmods.dev/skills/jonathanmr22/pact/pact-check"><img src="https://agentmods.dev/badge/skills/jonathanmr22/pact/pact-check/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.

agentmods 80×15 button for pact-check

Your own site · 80×15
<a href="https://agentmods.dev/skills/jonathanmr22/pact/pact-check"><img src="https://agentmods.dev/badge/skills/jonathanmr22/pact/pact-check.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 9 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 284 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.
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 $0.00009 $0.00284
Opus 5.5 $0.00004 $0.00114
Sonnet 5.5 $0.00002 $0.00057
Haiku 4.5 $0.00001 $0.00028

Measured 2mo ago against content hash bf6a03fded31, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

pact-check 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 2mo 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.

plugins/pact/skills/pact-check/SKILL.md · 27 lines

What it actually says

Review the changes made in this session against PACT's cognitive redirections. For each question, evaluate honestly:

1. Dependency trace: For every file edited this session, what depends on it and what does it depend on? Were all downstream consumers updated?

2. Staleness audit: What did the changes make stale? Check:

  • Architecture map (SYSTEM_MAP.yaml) — does it still reflect reality?
  • Feature flow docs — do they still describe the correct behavior?
  • Package knowledge files — any new packages used without research?
  • Pending work tracker — updated with current status?

3. Cache consistency: If any provider/state management was modified, were ALL caches updated (both list and map caches)?

4. Package verification: Were any packages used based on assumption rather than verified documentation? Check knowledge/packages/ for knowledge files.

5. Lifecycle impact: Do the changes survive all app states? Fresh install, normal open, background, force close, backup restore?

Report findings as:

  • PASS — checked and correct
  • STALE — needs updating (specify what)
  • UNCHECKED — couldn't verify (explain why)
  • VIOLATION — cognitive redirection was not followed (specify which)
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. 2mo ago First seen · 27 lines · 9 tokens per session scan A bf6a03fded31

Subscribe to this mod's changes

pact-check is a skill published in the GitHub repository jonathanmr22/pact (16 stars, last pushed 4mo ago), licensed MIT. It adds 9 tokens to every session and 284 once invoked, about $0.0000 per session on Opus 5.5. 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.

AI SafetyClaude CodeCode reviewai-agentai-coding-assistantai-governanceanthropic
Related

pact-check compared with skills from other repositories

pact-check next to 6 skills from other repositories
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pact-checkjonathanmr22/pactSkill164mo agoMITA9Claude Code
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code-reviewQBall-Inc/the-bulwarkSkill8yesterdayMITA61Claude Code
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adversarial-reviewertmj-90/gafferSkill22d agoApache-2.0A115Claude Code, Codex
card-reviewtmj-90/gafferSkill22d agoApache-2.0A125Claude Code, Codex
review-tickettmj-90/gafferSkill22d agoApache-2.0A143Claude Code, Codex