What is harmont-cli CLAUDE.md?

A set of development instructions for Harmont CLI, a Rust command-line tool organized as a Cargo workspace, which is a project containing several related Rust packages.

It guides Rust builds and tests, changes across the CLI's packages, event-stream output, configuration, execution backends, and plugin protocol.

It reduces confusion about where shared code belongs and helps keep the CLI, software development kit, templates, and documentation consistent.

How harmont-dev/harmont-cli configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to harmont-dev/harmont-cli. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/harmont-dev/harmont-cli/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/harmont-dev/harmont-cli

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/harmont-dev/harmont-cli/claude-md/github.svg)](https://agentmods.dev/instructions/harmont-dev/harmont-cli/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/harmont-dev/harmont-cli/claude-md"><img src="https://agentmods.dev/badge/instructions/harmont-dev/harmont-cli/claude-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/harmont-dev/harmont-cli/claude-md"><img src="https://agentmods.dev/badge/instructions/harmont-dev/harmont-cli/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 980 This file is loaded in full into every session.

When invoked 980 The same file — it is already loaded in full.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00980	$0.00980
Opus 5.5	$0.00392	$0.00392
Sonnet 5.5	$0.00196	$0.00196
Haiku 4.5	$0.00098	$0.00098

Measured 2mo ago against content hash b0a1f7242ee9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

harmont-cli 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 2mo 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.

CLAUDE.md · 60 lines

How it starts

The opening of the file, as written. The whole thing — 60 lines — stays where its author put it; the contents beside it link to each section on GitHub.

The cli/ directory is a Cargo workspace.

crates/hm/ — the hm binary (today's CLI body).
crates/hm-core/ — the shared core: config (layered project/user/env config + credential storage), exec (the ExecutionBackend trait + LocalBackend in-process Docker DAG scheduler + CloudBackend submit+watch over the SDK), and sys_runtime (the process-wide git/python/dirs/cwd runtime). The hm binary renders the emitted BuildEvent stream (via hm-render) and owns Ctrl-C; auth is injected (the backends take a built HarmontClient).
crates/hm-render/ — drive_stream: consumes an EventStream and writes terminal/JSON output. No I/O beyond stdout.
crates/hm-pipeline-ir/ — pipeline IR schema (serde structs only, no runtime).
crates/hm-common/ — shared utilities (OS/filesystem, formatting, and other cross-crate helpers). This is the source of truth for common code; prefer adding shared helpers here.
crates/hm-plugin-protocol/ — wire types (serde structs only). Run cargo build from the workspace root.

For cross-cutting doctrine see PRINCIPLES.md.

Testing

When writing or running any Rust test, follow the writing-rust-tests skill: #[rstest] over bare #[test], parametrized #[case] over duplicated test functions and hand-rolled loops, proptest for domain-wide properties. Run with plain cargo test -p <crate> (no nextest/just wrapper).

Documentation

When writing or editing any docblock, doc comment, or module header (///, //!) — including on code you just changed — follow the writing-interface-docblocks skill: a docblock is a contract, not a changelog. Terse, present-tense, no prompt or diff leakage (rather than, now returns, as requested); document the when of errors/panics, not the why; module docs name the domain, not the one item currently inside them.

DSL

The harmont Python package (pipeline DSL) lives inside crates/hm-dsl-engine/harmont-py/ so it ships with the crate.

Read the full file on GitHub · 60 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.

2mo ago First seen · 60 lines · 980 tokens per session scan A b0a1f7242ee9

Subscribe to this mod's changes

harmont-cli CLAUDE.md is an instructions file published in the GitHub repository harmont-dev/harmont-cli (21 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 980 tokens to every session, about $0.0039 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 2026-08-30.

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harmont-cli: Instructions file for Claude Code