init

A setup command that adds rules to a project's CLAUDE.md file, which is a set of instructions for the coding agent working in that project.

In plain words
What is it for?
Use it when enabling codemunch in a project so the agent uses symbol search, focused source fetching, project exploration, and reference lookup during code exploration.
Why use it?
It tells the agent to use codemunch for finding and understanding code, helping avoid unnecessary full-file reads and manual searches.

Command

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 commands/benmarte/codemunch/init
Clone the repo
git clone --depth 1 https://github.com/benmarte/codemunch
Per session 17 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 483 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 $0.00017 $0.00483
Opus 5 $0.00009 $0.00242
Sonnet 5 $0.00003 $0.00097
Haiku 4.5 $0.00002 $0.00048

Measured yesterday against content hash ed418fd99b8d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

init 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.

commands/init.md · 39 lines

What it actually says

Add the following block to the project's CLAUDE.md file (create it if it doesn't exist). Place it near the top so it takes priority:

## Code Exploration — MANDATORY (codemunch)

<CRITICAL>
You MUST use codemunch for ALL code exploration. This is NON-NEGOTIABLE. Do NOT ignore this rule.
Reading full files when a codemunch command exists for the task is a violation of your instructions.
</CRITICAL>

### Rules (enforced, no exceptions)

1. **NEVER read a full source file to understand what a function/class does.** Use `/codemunch:fetch <name>` instead. It reads ~35 tokens instead of ~8,000.
2. **NEVER use Grep or Glob to find functions, classes, or types.** Use `/codemunch:search <query>` instead. Supports filters: `kind:class`, `file:auth`, `in:ClassName`, `sig:ReturnType`.
3. **NEVER read multiple files to understand project structure.** Use `/codemunch:explore [path]` instead.
4. **NEVER use Grep to find symbol usages.** Use `/codemunch:refs <name>` instead.
5. **The ONLY exception**: Use Read when you need to Edit a file, since Edit requires file content in context.

### Decision tree

- Need to find a symbol? → `/codemunch:search`
- Need to read a symbol's code? → `/codemunch:fetch`
- Need to understand structure? → `/codemunch:explore`
- Need to find references? → `/codemunch:refs`
- Need to edit a file? → Read first, then Edit (this is the ONLY valid use of Read for source files)

The index auto-updates — no manual indexing needed.

After adding the block:

  1. Verify the CLAUDE.md file contains the codemunch section
  2. Report: "codemunch instructions added to CLAUDE.md — Claude will now automatically use token-efficient exploration."

If CLAUDE.md already contains a codemunch section, say so and skip.

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 First seen · 39 lines · 17 tokens per session scan A ed418fd99b8d

Subscribe to this mod's changes

init is a command published in the GitHub repository benmarte/codemunch (7 stars, last pushed 5mo ago), licensed MIT. It adds 17 tokens to every session and 483 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.