verification

A set of rules for independently checking whether a task really achieved its goal, using validation and evidence such as test results or screenshots. It distinguishes finishing the work from proving that it works.

In plain words
What is it for?
Use it when reviewing completed work, deciding whether to pass a task, or collecting proof from tests, builds, and other validation.
Why use it?
It prevents an unverified claim of success from being treated as a completed task. It also prompts checks for missing implementation, weak error handling, and unfinished code.

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/romiluz13/cc10x/verification
Any agent
npx skills add romiluz13/cc10x --skill verification
Clone the repo
git clone --depth 1 https://github.com/romiluz13/cc10x

Made for: Claude Code, Codex.

Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,455 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 $0.00052 $0.01455
Opus 5 $0.00026 $0.00727
Sonnet 5 $0.00010 $0.00291
Haiku 4.5 $0.00005 $0.00145

Measured 2d ago against content hash b7f601501d13, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

verification 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 2d 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/cc10x/skills/verification/SKILL.md · 127 lines

How it starts

The opening of the file, as written. The whole thing — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Verification

Task completion is not goal achievement. Verify that the phase achieved its goal, not that prior agents said it did. If you cannot independently reproduce a claimed success, return FAIL.

Reference Files

  • references/live-production-testing.md — live/production verification strategy

The Gate Function

COMPLETION → TRUTH → PROOF
  1. Completion: Did the agent finish its task? (contract says PASS)
  2. Truth: Is the work actually correct? (independent verification)
  3. Proof: Can you prove it with evidence? (exit codes, test output, screenshots)

A PASS without proof is a claim.

Self-Critique Gate (BEFORE Verification Commands)

Before running any test, audit your own work:

Code Quality:

  • No TODO/FIXME/stubs in changed files
  • No commented-out code
  • No debug logging left in
  • Error handling covers the failure modes the change introduces
  • Types are correct (not as any or as unknown)

Implementation Completeness:

  • Every acceptance criterion from the plan has corresponding code
  • Every named scenario has a test
  • Every error path in the plan has handling
  • No silent failures (empty catches, discarded errors)
  • Build succeeds, type-check passes

Self-Critique Verdict: If any check fails, fix it BEFORE running verification. Don't run tests you know will fail on code quality issues — a known-failing run produces noise evidence that then has to be explained away.

Validation Levels

Level What Exit Code When
Deterministic Automated test 0/1 Always — the default
Probabilistic Test with known flake rate 0/1 (retry policy) When deterministic impossible (timing, network)
Manual Human verifies with checklist n/a When automation not worth the cost
Live Production-like environment 0/1 When plan requires live proof

Read the full file on GitHub · 127 lines

Files

What ships with it

5 files 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.

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. 2d ago First seen · 127 lines · 52 tokens per session scan A b7f601501d13

Subscribe to this mod's changes

verification is a skill published in the GitHub repository romiluz13/cc10x (164 stars, last pushed 29d ago), licensed MIT. It adds 52 tokens to every session and 1,455 once invoked, about $0.0003 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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