hunch CLAUDE.md

hunch CLAUDE.md is an instructions file for coding agents from davesheffer/hunch. It costs 2,899 tokens per session, scanned A, original, Apache-2.0.

A project guide for Hunch, a command-line tool and MCP server that records engineering decisions and links them to code and documentation in a Git-based graph.

In plain words
What is it for?
Use it when adding or reviewing decisions, bugs, constraints, components, documentation links, or checks for architectural drift.
Why use it?
It helps coding agents check whether changes still follow recorded architectural decisions and whether documentation matches those decisions.

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/davesheffer/hunch/claude-md
Clone the repo
git clone --depth 1 https://github.com/davesheffer/hunch

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 hunch CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/davesheffer/hunch/claude-md.svg)](https://agentmods.dev/instructions/davesheffer/hunch/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/davesheffer/hunch/claude-md"><img src="https://agentmods.dev/badge/instructions/davesheffer/hunch/claude-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 2,899 This file is loaded in full into every session.
When invoked 2,899 The same file — it is already loaded in full.
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 $0.02899 $0.02899
Opus 5 $0.01450 $0.01450
Sonnet 5 $0.00580 $0.00580
Haiku 4.5 $0.00290 $0.00290

Measured today against content hash 335ae056b2ad, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

hunch 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 today.

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.md · 90 lines

How it starts

The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

What this is

Hunch is an engineering-memory and architectural-conformance layer: a CLI + MCP server that builds a persistent, git-native reasoning graph (decisions, bugs, constraints, components), delivers the relevant evidence to coding assistants, and checks their changes deterministically. Published as @davesheffer/hunch (hunch binary). Pure TypeScript ESM, Node ≥22.13, no build step at dev time (run via tsx).

Hunch keeps memory true along two spokes: graph≠code (Architectural Conformance / intent-conformance — does the code still satisfy recorded intent?) and, as of v0.39.0, doc≠graph (decision-grounding — does the prose still match the live decision?). The doc≠graph spoke extends to markdown itself (src/core/docanchors.ts): a <!-- hunch:topic <topic> [dec_id] --> marker in AGENTS.md/CLAUDE.md/docs grounds the pre-edit hook with that topic's current decision, and a pinned marker whose decision gets superseded fires deterministic doc-anchor-stale drift (CI-gated in hunch drift, healed via hunch heal). A decision can carry an optional topic anchor (drift-detection key; defaults null, no schema bump, existing graphs load unchanged) with a current/history/rejected query contract. Read-time grounding surfaces a file's topic-anchored decisions on the pre-edit hook (doc-precedence framing: follow the graph, not a stale doc — including what each decision rejected), and the deterministic anchor-stale drift kind fires when a file is still anchored to a SUPERSEDED decision while a current one exists for its topic.

Commands

npm run dev -- <args>        # run the CLI from source via tsx (e.g. npm run dev -- doctor)
npm run hunch -- <args>      # alias for the above
npm run build                # clean + tsc -> dist/ (the published artifact; bin = dist/cli/index.js)
npm run typecheck            # tsc --noEmit
npm test                     # tsx --test over test/*.test.ts
tsx --test test/check.test.ts   # run a single test file

Read the full file on GitHub · 90 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. today Changed · -11 tokens per session 335ae056b2ad
  2. 4d ago First seen · 90 lines · 2,910 tokens per session scan A 70011247b571

Subscribe to this mod's changes

hunch CLAUDE.md is an instructions file published in the GitHub repository davesheffer/hunch (9 stars, last pushed today), licensed Apache-2.0. It adds 2,899 tokens to every session, about $0.0145 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.