mnm-verify

mnm-verify is a skill for Claude Code from momomuchu/make-no-mistakes. It costs 92 tokens per session (1,711 once invoked), scanned A, original, MIT.

An internal verification role for the make-no-mistakes workflow. It independently reruns checks and tries to disprove that a code change meets its frozen requirements.

In plain words
What is it for?
Use it inside make-no-mistakes to rerun verification gates, create adversarial tests, and report whether the change survives attempts to break it.
Why use it?
It prevents the person or agent that made a change from being the only one judging whether it works.

Skill for Claude Code

Written for Claude Code: disallowed-tools in frontmatter. Also seen: agent in frontmatter; names the NotebookEdit tool.

Part of the make-no-mistakes plugin — 5 skills, 6 agents, 2 hooks shipped together

Good fit Use it inside make-no-mistakes to rerun verification gates, create adversarial tests, and report whether the change survives attempts to break it.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/momomuchu/make-no-mistakes/mnm-verify
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 momomuchu/make-no-mistakes --skill mnm-verify
Clone the repo
git clone --depth 1 https://github.com/momomuchu/make-no-mistakes

Made for: Claude Code.

Or install make-no-mistakes, the plugin that ships this one along with the rest of its 5 skills, 6 agents, 2 hooks.

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 mnm-verify

README.md
[![agentmods](https://agentmods.dev/badge/skills/momomuchu/make-no-mistakes/mnm-verify/github.svg)](https://agentmods.dev/skills/momomuchu/make-no-mistakes/mnm-verify)
Your own site
<a href="https://agentmods.dev/skills/momomuchu/make-no-mistakes/mnm-verify"><img src="https://agentmods.dev/badge/skills/momomuchu/make-no-mistakes/mnm-verify/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 mnm-verify

Your own site · 80×15
<a href="https://agentmods.dev/skills/momomuchu/make-no-mistakes/mnm-verify"><img src="https://agentmods.dev/badge/skills/momomuchu/make-no-mistakes/mnm-verify.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 92 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,711 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 $0.00092 $0.01711
Opus 5 $0.00046 $0.00856
Sonnet 5 $0.00018 $0.00342
Haiku 4.5 $0.00009 $0.00171

Measured 11d ago against content hash aa7932e831e8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

mnm-verify 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 11d 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.

skills/mnm-verify/SKILL.md · 136 lines

How it starts

The opening of the file, as written. The whole thing — 136 lines — stays where its author put it; the contents beside it link to each section on GitHub.

mnm-verify — the adversarial verification panel

You are not the author. Law 2: the author never grades the author. Your only job is to try to prove this diff is wrong, and report exactly how far that attempt got. A criterion survives because your panel failed to break it under real attempts — never because it looks plausible.

Verify MECHANICALLY — re-execute, don't trust the log (this is what makes you independent)

Reading verdict.log and seeing green is not verification — the implementer wrote those rows and could have fabricated them. Your independence is worth nothing unless you act on it:

  1. Re-execute the gate stack yourself: run scripts/verify_confirm.sh <task_id> <dod_hash> <iter>. It re-runs the real gates (it does not trust the implementer's rows) and only logs the verify gate — which the DONE guard now requires — if the independent re-run is genuinely green.
  2. Generate your OWN adversarial tests, blind to the implementer's tests: derive property-based invariants and metamorphic relations from the frozen DoD (not from the code), plus — for a bug fix — a reproduction that must fail before the fix. Write them to a scratch file (via Bash) and run them against the diff. A fix that survives your hostile inputs is worth far more than one that passes the author's chosen example.
  3. Only after both hold do you certify. If either fails, the run is STUCK, not DONE — say so.

What you receive — nothing else

$ARGUMENTS = a task_id. Resolve deterministically, from disk, and read only this:

  • .mnm/dod.lock.md, hash-checked against .mnm/anchors.json — mismatch means someone touched the frozen spec; stop and return INTEGRITY-COMPROMISED, that is not yours to silently fix.
  • the diff / worktree ref you were pointed at.
  • the declared tier (T–C).
  • on a retry only: the prior round's rejection reason.

You have no conversation history (structural, via context: fork) and no implementer report. A claim that a check "passes" is not evidence until you have run it yourself, this pass.

Read the full file on GitHub · 136 lines

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. 11d ago First seen · 136 lines · 92 tokens per session scan A aa7932e831e8

Subscribe to this mod's changes

mnm-verify is a skill published in the GitHub repository momomuchu/make-no-mistakes (8 stars, last pushed 2mo ago), licensed MIT. It adds 92 tokens to every session and 1,711 once invoked, about $0.0005 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.

Related

Other skills, from other repositories

repo-audit

Use this skill when the user wants to audit a repository for baseline compliance, check code quality, security posture, CI/CD setup, testing, documentation, and ecosystem configuration. Runs 9 checklist categories and emits a Markdown report plus JSON sidecar at .orchestrator/metrics/repo-audit- .json. Context: User…

Kanevry/session-orchestrator · 184 tokens

test-runner

Use this skill when orchestrating agentic end-to-end tests. Resolves target + profile, dispatches the right driver(s) (playwright for web today, peekaboo for macOS (issue #381)), invokes the ux-evaluator agent (opus, read-only) against driver artifacts, reconciles findings with the open issue tracker via…

Kanevry/session-orchestrator · 124 tokens

peekaboo-driver

Use this skill when driving native-UI AX-tree snapshots and screenshots via steipete/peekaboo (MIT, macOS-only). Dispatched by skills/test-runner/ to capture native-UI AX-tree snapshots + screenshots on macOS 15+ targets, and exits with deterministic JSON output the orchestrator can parse.

Kanevry/session-orchestrator · 73 tokens

playwright-driver

Use this skill when executing web tests via the canonical playwright npm package (Microsoft, Apache-2.0). Dispatched by skills/test-runner/ to execute web tests against a target, captures token-frugal AX-tree snapshots + screenshots + console output under .orchestrator/metrics/test-runs/ /, and exits with…

Kanevry/session-orchestrator · 86 tokens

quality-gates

Use this skill when referencing canonical quality check commands for typecheck, test, and lint. Defines 4 variants (Baseline, Incremental, Full Gate, Per-File) used by session-start, wave-executor, session-end, and session-reviewer. Reference skill — not invoked directly.

Kanevry/session-orchestrator · 63 tokens

dev-tdd

TDD development with Red-Green-Refactor cycle. Use to implement a feature by writing tests BEFORE the code. Trigger automatically when the user asks for TDD, wants to write tests first, mentions "test first", or asks to implement, add, create, fix, correct code, a new feature, a bugfix, or a functionality.

christopherlouet/claude-base · 75 tokens