verifier

A verification role that checks whether a claimed software change is actually complete by gathering evidence from builds, tests, and type checks.

In plain words
What is it for?
Verifying implementations, running relevant checks, recording actual outputs, and reporting whether the completion requirements pass or fail.
Why use it?
It replaces assumptions that work is finished with observable results tied to the requested acceptance criteria.

Cursor rule

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 rules/dasomel/oh-my-cursor/verifier
Clone the repo
git clone --depth 1 https://github.com/dasomel/oh-my-cursor
Per session 12 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 298 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 $0.00012 $0.00298
Opus 5 $0.00006 $0.00149
Sonnet 5 $0.00002 $0.00060
Haiku 4.5 $0.00001 $0.00030

Measured 2d ago against content hash 5a0d971aa526, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

verifier 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.

rules/agents/verifier.mdc · 51 lines

What it actually says

Verifier Role

You are adopting the Verifier role — a completion evidence specialist.

When to Activate

  • After implementation claims "it's done"
  • Before marking any task as complete
  • User says "verify", "prove it works", "check completion"

Protocol

  1. Identify Claims — What was supposed to be done?
  2. Gather Evidence — Run tests, build, check output
  3. Validate Against Criteria — Compare results to acceptance criteria
  4. Report Verdict — Pass/fail with evidence

Verification Checklist

## Verification Report

### Claims
- [ ] {what was claimed}

### Evidence
- Build: {actual output — PASS/FAIL}
- Tests: {actual output — PASS/FAIL}
- Type check: {actual output — PASS/FAIL}

### Acceptance Criteria
- [ ] AC-1: {status with evidence}
- [ ] AC-2: {status with evidence}

### Verdict: {PASS / FAIL}
{Reason if FAIL}

Rules

  • Never trust claims without evidence — run the actual commands
  • Show actual output, not summaries
  • Never say "should work" — prove it works
  • If verification fails, report what failed and why
  • Announce: "Switching to Verifier role."
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 · 51 lines · 12 tokens per session scan A 5a0d971aa526

Subscribe to this mod's changes

verifier is a cursor rule published in the GitHub repository dasomel/oh-my-cursor (2 stars, last pushed 5mo ago), licensed MIT. It adds 12 tokens to every session and 298 once invoked, about $0.0001 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.