verify

verify is a skill for Claude Code from shawnclybor/clybor-claude-tooling. It costs 94 tokens per session (1,888 once invoked), scanned A, original, MIT.

A verification gate that checks a product requirements document's success criteria with deterministic tests. A PRD is a document describing what a product should do and how success is measured.

In plain words
What is it for?
Running checks against a PRD after implementation and confirming whether each requirement has passed or failed.
Why use it?
It shows a clear pass or fail result for every stated success criterion instead of relying on an informal review.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is | 1 | P95 latency < 200ms | `pytest tests/perf/test_latency.py -k p95` | PASS | [run-001.log](../.verify/<slug>/run-001.log) |.

Good fit Running checks against a PRD after implementation and confirming whether each requirement has passed or failed.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/shawnclybor/clybor-claude-tooling
agentmods
npx agentmods add skills/shawnclybor/clybor-claude-tooling/verify

Made for: Claude Code.

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 verify

README.md
[![agentmods](https://agentmods.dev/badge/skills/shawnclybor/clybor-claude-tooling/verify/github.svg)](https://agentmods.dev/skills/shawnclybor/clybor-claude-tooling/verify)
Your own site
<a href="https://agentmods.dev/skills/shawnclybor/clybor-claude-tooling/verify"><img src="https://agentmods.dev/badge/skills/shawnclybor/clybor-claude-tooling/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 verify

Your own site · 80×15
<a href="https://agentmods.dev/skills/shawnclybor/clybor-claude-tooling/verify"><img src="https://agentmods.dev/badge/skills/shawnclybor/clybor-claude-tooling/verify.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 94 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,888 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 $0.00094 $0.01888
Opus 5.5 $0.00038 $0.00755
Sonnet 5.5 $0.00019 $0.00378
Haiku 4.5 $0.00009 $0.00189

Measured 4d ago against content hash 48d59c688142, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

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.

.claude/skills/verify/SKILL.md · 150 lines

How it starts

The opening of the file, as written. The whole thing — 150 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Verify

Bridge between "code is written" and "feature is done." Every PRD success criterion must have a corresponding automated or scripted check that returns green. If a criterion can't be verified by a check, either the criterion is wrong (move to open questions) or a check needs to be written.

When to use

  • After ralph-implement completes its loop
  • Before quality-review runs the Stage 6 evaluation
  • Any time you need to answer "are the PRD criteria actually met?"

When NOT to use

  • Mid-implementation (run task-level checks via ralph-implement instead)
  • For non-deterministic criteria — those belong in the evaluation stage, not verification

Inputs

  • prd_path — path to the PRD with the success criteria
  • check_map — mapping of criterion to verification command. Format: <criterion_text>: <command>. Example: P95 latency < 200ms: pytest tests/perf/test_latency.py -k p95.
  • (optional) evidence_dir — where to write per-criterion evidence (default .verify/<feature_slug>/)

Output

docs/PRDs/<feature_slug>-verification.md:

# <Feature title> — Verification

**PRD:** [<feature_slug>](./<feature_slug>.md)
**Run at:** <iso8601>
**Verdict:** PASS | FAIL | PARTIAL

## Criteria

| # | Criterion | Check | Result | Evidence |
|---|---|---|---|---|
| 1 | P95 latency < 200ms | `pytest tests/perf/test_latency.py -k p95` | PASS | [run-001.log](../.verify/<slug>/run-001.log) |
| 2 | Returns 400 on invalid email | `pytest tests/api/test_validation.py::test_invalid_email` | PASS | [run-002.log](../.verify/<slug>/run-002.log) |
| 3 | Cyclomatic complexity ≤ 8 in auth/ | `radon cc auth/ -a -nc` | FAIL | [run-003.log](../.verify/<slug>/run-003.log) |

## Failures (if any)

### Criterion 3 — Cyclomatic complexity ≤ 8 in auth/

`auth/token.py:refresh_token` has complexity 11. Top offender: nested conditional in `if not token.valid and not token.expired:`.

**Recommendation:** Extract token validity check into a single boolean predicate.

Read the full file on GitHub · 150 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 Changed 48d59c688142
  2. 1mo ago Changed · +38 lines 0ffcc31164b9
  3. 1mo ago First seen · 112 lines · 94 tokens per session scan A 194951e7c11e

Subscribe to this mod's changes

verify is a skill published in the GitHub repository shawnclybor/clybor-claude-tooling (6 stars, last pushed 5d ago), licensed MIT. It adds 94 tokens to every session and 1,888 once invoked, about $0.0004 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 2026-08-31.

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