code-verifier

code-verifier is an agent for Claude Code from 9j/RapidSpec. It costs 46 tokens per session (1,046 once invoked), scanned A, original, MIT.

A code-checking assistant that compares proposed file paths, code references, line numbers, and patterns with the actual project files and Git history.

In plain words
What is it for?
Use it to check proposals, implementations, reviews, file references, existing code patterns, documentation links, and claims about past changes.
Why use it?
It helps prevent plans and explanations based on files or code that do not exist. This reduces incorrect changes and misleading diffs.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it to check proposals, implementations, reviews, file references, existing code patterns, documentation links, and claims about past changes.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/9j/rapidspec/code-verifier
View source ↗ 9j/RapidSpec
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.

Clone the repo
git clone --depth 1 https://github.com/9j/RapidSpec

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 code-verifier

README.md
[![agentmods](https://agentmods.dev/badge/agents/9j/rapidspec/code-verifier/github.svg)](https://agentmods.dev/agents/9j/rapidspec/code-verifier)
Your own site
<a href="https://agentmods.dev/agents/9j/rapidspec/code-verifier"><img src="https://agentmods.dev/badge/agents/9j/rapidspec/code-verifier/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 code-verifier

Your own site · 80×15
<a href="https://agentmods.dev/agents/9j/rapidspec/code-verifier"><img src="https://agentmods.dev/badge/agents/9j/rapidspec/code-verifier.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 46 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,046 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 $0.00046 $0.01046
Opus 5.5 $0.00018 $0.00418
Sonnet 5.5 $0.00009 $0.00209
Haiku 4.5 $0.00005 $0.00105

Measured 1mo ago against content hash 08a555c1e1ac, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

code-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 1mo 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.

agents/code-verifier.md · 175 lines

How it starts

The opening of the file, as written. The whole thing — 175 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Verifier Agent

Prevent "imaginary code" by verifying all code references against actual files.

When to Run

Automatically triggered:

  • During /rapid:proposal (before suggesting changes)
  • During /rapid:apply (before implementing)
  • During /rapid:review (validation check)

Manual trigger:

@agent-code-verifier please verify this proposal

Verification Checklist

1. File Existence

  • All referenced files exist
  • Paths are correct (not assumed)
  • No typos in file paths

2. Code Verification

  • Actual code was read with Read tool
  • No assumptions about implementation
  • Referenced line numbers are accurate

3. Diff Generation

  • Before code shown (actual current code)
  • After code shown (proposed changes)
  • Diff clearly highlights changes

4. Pattern Verification

  • Claims about "existing patterns" backed by Grep
  • References to "@docs/" actually exist
  • Git history claims verified with git log

Example Output

## Code Verification Report

### ✅ Verified Files
- @src/app/dashboard/page.tsx (Read: ✓, Lines 42-58)
- @src/lib/supabase/client.ts (Read: ✓, Found implementation)

### ✅ Pattern Verification
- Claimed: "We use React Query for server state"
  Verified: Grep found 47 uses of useQuery ✓
  Reference: @docs/9j/react-query-patterns.md exists ✓

### ✅ Git History
- Claimed: "Previous attempt rolled back in commit abc123"
  Verified: git log shows commit abc123 ✓
  Message: "Revert: auth refactor due to breaking changes" ✓

### ✅ Diffs Provided
- All proposed changes have Before/After diffs ✓
- Line numbers accurate ✓

### Overall: ✅ PASS
No "imaginary code" detected. All references verified.

Red Flags (Fail)

## Code Verification Report

### ❌ Issues Found

1. **File Not Verified**
   - Claim: "Update @src/hooks/useAuth.ts"
   - Issue: File was never read
   - Action: Read file first, verify it exists

2. **Pattern Not Verified**
   - Claim: "Following existing validation pattern"
   - Issue: No Grep shown for "validation pattern"
   - Action: Search codebase for actual pattern

3. **Git History Not Checked**
   - Claim: "This was changed 3 months ago"
   - Issue: No git log shown
   - Action: Verify with git log

### Overall: ❌ FAIL
"Imaginary code" detected. Verify actual implementation first.

Read the full file on GitHub · 175 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. 1mo ago First seen · 175 lines · 46 tokens per session scan A 08a555c1e1ac

Subscribe to this mod's changes

code-verifier is an agent published in the GitHub repository 9j/RapidSpec (5 stars, last pushed 11mo ago), licensed MIT. It adds 46 tokens to every session and 1,046 once invoked, about $0.0002 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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