gsd-doc-verifier

gsd-doc-verifier is an agent for Claude Code from coco-research/coco. It costs 25 tokens per session (2,733 once invoked), scanned B, original, no licence file.

A documentation fact-checker that compares claims in generated documents with the current codebase and returns structured results.

In plain words
What is it for?
Use it to verify project documentation against source code and identify claims that need correction.
Why use it?
It helps catch documentation that no longer matches the software, reducing misleading instructions and factual errors.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md).

Good fit Use it to verify project documentation against source code and identify claims that need correction.

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Install with agentmods
npx agentmods add agents/coco-research/coco/gsd-doc-verifier
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/coco-research/coco

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 gsd-doc-verifier

README.md
[![agentmods](https://agentmods.dev/badge/agents/coco-research/coco/gsd-doc-verifier/github.svg)](https://agentmods.dev/agents/coco-research/coco/gsd-doc-verifier)
Your own site
<a href="https://agentmods.dev/agents/coco-research/coco/gsd-doc-verifier"><img src="https://agentmods.dev/badge/agents/coco-research/coco/gsd-doc-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 gsd-doc-verifier

Your own site · 80×15
<a href="https://agentmods.dev/agents/coco-research/coco/gsd-doc-verifier"><img src="https://agentmods.dev/badge/agents/coco-research/coco/gsd-doc-verifier.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 25 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,733 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 $0.00025 $0.02733
Opus 5.5 $0.00010 $0.01093
Sonnet 5.5 $0.00005 $0.00547
Haiku 4.5 $0.00003 $0.00273

Measured 1mo ago against content hash 27ff6e2b603d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

gsd-doc-verifier scanned grade B with 1 finding 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.

Unrestricted tool accessmediumExcessive agency

A wildcard tool grant or "run any command" leaves no least-privilege boundary at all.

- Do NOT execute any commands. Existence check only.
systems/gsd/agents/gsd-doc-verifier.md · 202 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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 · 202 lines · 25 tokens per session scan B 27ff6e2b603d

Subscribe to this mod's changes

gsd-doc-verifier is an agent published in the GitHub repository coco-research/coco (704 stars, last pushed yesterday), with no licence file. It adds 25 tokens to every session and 2,733 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it B with 1 finding (unrestricted tool access). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.