atomic-verify

atomic-verify is a skill for Claude Code, Codex from damusix/atomic-claude. It costs 79 tokens per session (791 once invoked), scanned A, original, MIT.

A rule that requires fresh command output before claiming that coding work is complete or successful. It checks that the evidence actually supports the claim.

In plain words
What is it for?
Use it to enforce checks for tests, builds, linting, type checking, bug reproductions, changed specifications, and other completion claims.
Why use it?
It prevents unsupported statements such as “the tests pass” or “the bug is fixed” when no current verification was run.

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/damusix/atomic-claude/atomic-verify
Any agent
npx skills add damusix/atomic-claude --skill atomic-verify
Clone the repo
git clone --depth 1 https://github.com/damusix/atomic-claude

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 atomic-verify

README.md
[![agentmods](https://agentmods.dev/badge/skills/damusix/atomic-claude/atomic-verify.svg)](https://agentmods.dev/skills/damusix/atomic-claude/atomic-verify)
Your own site
<a href="https://agentmods.dev/skills/damusix/atomic-claude/atomic-verify"><img src="https://agentmods.dev/badge/skills/damusix/atomic-claude/atomic-verify.svg" alt="Measured on agentmods" height="20"></a>
Per session 79 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 791 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 $0.00079 $0.00791
Opus 5 $0.00039 $0.00396
Sonnet 5 $0.00016 $0.00158
Haiku 4.5 $0.00008 $0.00079

Measured 4d ago against content hash 5668ada68772, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

atomic-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 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.

context/skills/atomic-verify/SKILL.md · 77 lines

How it starts

The opening of the file, as written. The whole thing — 77 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Verify before claim. No claim without fresh evidence in this turn.

  • "done", "fixed", "passing", "complete", "ready to merge", "looks good"
  • "should work", "should pass", "this works"
  • "tests pass", "build green", "lint clean", "typecheck green"
  • "bug fixed", "regression resolved"
  • Any phrase implying success not preceded by verification output IN THIS TURN.

The gate

  1. IDENTIFY — what command proves this claim?
  2. RUN — execute it fresh in this turn.
  3. READ — full output, check exit code.
  4. VERIFY — output matches the claim?
  5. ONLY THEN — state the claim, WITH evidence.

Skip any step = lying, not verifying.

Claim → required check

Claim Required verification
tests pass run test command, see 0 failures
build green run build, exit 0
lint clean run lint, 0 errors
typecheck green run typecheck (tsc/mypy/etc), 0 errors
bug fixed run repro that failed before, see it pass now
agent task complete check VCS diff for actual changes
regression test works red → fix → green sequence verified
spec/artifact changed run atomic validate spec + atomic validate config + atomic validate artifacts, 0 FAIL (skip if atomic binary absent)

Verification discipline

Every completion claim needs a fresh command run in this turn. Watch for these moments:

  • Before saying "done" or "fixed" — run the proof command first
  • Before committing or pushing — verify all signals are green
  • After a subagent reports success — check the artifacts yourself
  • Partial checks (one test out of N) are not verification — run the full suite
  • When the change touched docs/spec/**, docs/design/**, or bundled artifacts (agents/, commands/, skills/, output-styles/, rules/, CLAUDE.md), run atomic validate spec (when a spec changed), atomic validate config, and atomic validate artifacts. A FAIL is a gate failure with the same standing as a failing test. Graceful degradation: if the atomic binary is not on PATH or no matching files exist, skip silently — never fail the gate on absence. (This skill ships to user repos that may not have the binary installed.)

Read the full file on GitHub · 77 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. 4d ago First seen · 77 lines · 79 tokens per session scan A 5668ada68772

Subscribe to this mod's changes

atomic-verify is a skill published in the GitHub repository damusix/atomic-claude (84 stars, last pushed yesterday), licensed MIT. It adds 79 tokens to every session and 791 once invoked, about $0.0004 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 2026-08-30.

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