meta-validate-context

meta-validate-context is a skill for Claude Code, Codex from grimoire-rs/grimoire. It costs 38 tokens per session (523 once invoked), scanned A, original, Apache-2.0.

A checker for keeping subsystem rule files in `.claude/rules/` aligned with the code they describe.

In plain words
What is it for?
Use it to audit named types, modules, functions, errors, commands, storage details, and test fixtures against the current `src/` and test files.
Why use it?
It finds references to removed code and code additions missing from the documentation, reducing the risk of agents following outdated project guidance.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/grimoire-rs/grimoire/meta-validate-context
Any agent
npx skills add grimoire-rs/grimoire --skill meta-validate-context
Clone the repo
git clone --depth 1 https://github.com/grimoire-rs/grimoire

Made for: Claude Code, Codex.

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 meta-validate-context

README.md
[![agentmods](https://agentmods.dev/badge/skills/grimoire-rs/grimoire/meta-validate-context.svg)](https://agentmods.dev/skills/grimoire-rs/grimoire/meta-validate-context)
Your own site
<a href="https://agentmods.dev/skills/grimoire-rs/grimoire/meta-validate-context"><img src="https://agentmods.dev/badge/skills/grimoire-rs/grimoire/meta-validate-context.svg" alt="Measured on agentmods" height="20"></a>
Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 523 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00038 $0.00523
Opus 5 $0.00019 $0.00262
Sonnet 5 $0.00008 $0.00105
Haiku 4.5 $0.00004 $0.00052

Measured 5d ago against content hash d20f6ac677ac, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

meta-validate-context 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 5d 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.

.claude/skills/meta-validate-context/SKILL.md · 72 lines

What it actually says

Validate Context Rules

Check .claude/rules/subsystem-*.md files match current codebase.

Workflow

For each subsystem-*.md rule file:

  1. Read the rule — Extract type names, module paths, function names, error variants
  2. Grep the codebase — Verify each reference exists
  3. Check for new additions — Find new public types/modules not in rule
  4. Report — List stale references + missing additions

Subsystem Rules to Check

Rule Key References to Verify
subsystem-cli.md CLI context struct, command enum variants, output trait
subsystem-cli-api.md Report data types, output trait conventions
subsystem-cli-commands.md Documented command surface vs implemented commands
subsystem-file-structure.md Storage layout, data-root constraints
subsystem-tests.md Fixture names in conftest.py, test file names, runner methods, helper params

Subsystem rules are provisional placeholders while the implementation is scaffolded — verify against current src/ as code lands.

Verification Commands

# Check if a type still exists
grep -r "pub struct TypeName" src/
grep -r "pub enum TypeName" src/

# Check if a module still exists
ls src/module_name/

# Check for new public types not in the rule
grep -rn "^pub struct\|^pub enum\|^pub trait" src/ | grep -v test

Output Format

## Context Validation Report

### subsystem-cli.md
- OK: [type] still present
- STALE: [type] — renamed to [new_name] or removed
- MISSING: [new_type] — not documented in rule

### subsystem-file-structure.md
...

When to Run

  • After big refactors
  • Before major feature branches
  • Part of /code-check audits
  • Monthly
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. 5d ago First seen · 72 lines · 38 tokens per session scan A d20f6ac677ac

Subscribe to this mod's changes

meta-validate-context is a skill published in the GitHub repository grimoire-rs/grimoire (8 stars, last pushed today), licensed Apache-2.0. It adds 38 tokens to every session and 523 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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