truthmark CLAUDE.md

truthmark CLAUDE.md is an instructions file for coding agents from merlinhu1/truthmark. It costs 1,708 tokens per session, scanned A, a copy of truthmark AGENTS.md, MIT.

A set of instructions for an AI coding agent working in a repository. It defines which project documents are authoritative and how the agent should use repository rules and documentation.

In plain words
What is it for?
Use it to guide repository work such as choosing the right documentation, following project policies, and deciding which files control a change.
Why use it?
It reduces confusion when a project has several instruction files or when code and documentation disagree.

Instructions file

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 instructions/merlinhu1/truthmark/claude-md
Clone the repo
git clone --depth 1 https://github.com/merlinhu1/truthmark

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 truthmark CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/merlinhu1/truthmark/claude-md.svg)](https://agentmods.dev/instructions/merlinhu1/truthmark/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/merlinhu1/truthmark/claude-md"><img src="https://agentmods.dev/badge/instructions/merlinhu1/truthmark/claude-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 1,708 This file is loaded in full into every session.
When invoked 1,708 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod 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 $0.01708 $0.01708
Opus 5 $0.00854 $0.00854
Sonnet 5 $0.00342 $0.00342
Haiku 4.5 $0.00171 $0.00171

Measured yesterday against content hash a653f5e4cfc4, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

truthmark CLAUDE.md 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 yesterday.

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.

Origin

This is a copy

100% identical to truthmark AGENTS.md — 15 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

CLAUDE.md · 77 lines

How it starts

The opening of the file, as written. The whole thing — 77 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Repository rule source of truth: docs/repo/ai/repo-rules.md. Follow repository instruction files that are present in this checkout; do not assume optional policy docs exist.

Use explicitly configured repository policy docs only when they exist in this checkout.

Agent-specific:

  • Read the configured Truthmark routing files when choosing or updating canonical docs.
  • Use repository onboarding or docs-map files only when present and needed for unclear or cross-area routing.

Authority

Conflict order:

  1. this file (docs/repo/ai/repo-rules.md)
  2. .truthmark/config.yml
  3. docs/truthmark/routes/areas.md and docs/truthmark/routes/areas/**/*.md
  4. docs/repo/standards/**/*.md
  5. docs/repo/architecture/**/*.md
  6. docs/truthmark/product/**/*.md and docs/truthmark/engineering/**/*.md

Authoritative context is the current checkout plus user-provided session context; chat, external notes, and off-repo memory are non-authoritative unless committed or supplied now.

Code is the implementation. On code/doc conflict, inspect code, decide whether code is intentional or docs are stale, update stale docs for intentional behavior, and change code to match docs only when requested or required.

Documentation Scope

Everything under docs/repo/** is repo-local policy for developing Truthmark itself. It ships to nobody, src/** never references it, and it is not a downstream scaffold, generated surface, or required artifact for repositories that install Truthmark. Repo-local docs declare scope: repo-local and use doc_type, never truth_kind.

Everything else under docs/** describes the installed product. docs/truthmark/** is this repository dogfooding the same truth schema truthmark init scaffolds downstream, so it is evidence about the product; docs/repo/** is not.

Read the full file on GitHub · 77 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. yesterday Changed · -15 lines · -318 tokens per session a653f5e4cfc4
  2. 5d ago First seen · 92 lines · 2,026 tokens per session scan A 8a13713ff019

Subscribe to this mod's changes

truthmark CLAUDE.md is an instructions file published in the GitHub repository merlinhu1/truthmark (88 stars, last pushed 2d ago), licensed MIT. It adds 1,708 tokens to every session, about $0.0085 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to truthmark AGENTS.md, differing in 15 lines, and is treated as a copy.