What is decompose CLAUDE.md?

Instructions for Decompose, a local development process manager. It starts and stops native programs from a YAML configuration, similar to Docker Compose but without running containers.

Use it to start, stop, inspect, and view logs for configured local services, including separate named sessions when multiple environments are needed.

It gives developers one way to manage several local services and keep separate development environments apart. Background processes, logs, status, and shutdown can be handled through one command-line interface.

How sciyoshi/decompose configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to sciyoshi/decompose. 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/sciyoshi/decompose/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/sciyoshi/decompose

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/sciyoshi/decompose/claude-md/github.svg)](https://agentmods.dev/instructions/sciyoshi/decompose/claude-md)

Your own site

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

Per session 2,434 This file is loaded in full into every session.

When invoked 2,434 The same file — it is already loaded in full.

Security scan A 1 finding. 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	$0.02434	$0.02434
Opus 5.5	$0.00974	$0.00974
Sonnet 5.5	$0.00487	$0.00487
Haiku 4.5	$0.00243	$0.00243

Measured yesterday against content hash a2c2abd3f8bf, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

decompose CLAUDE.md scanned grade A 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 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

command: "curl -f localhost:8080/health"

CLAUDE.md · 243 lines

How it starts

The opening of the file, as written. The whole thing — 243 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Decompose

A simple process orchestrator for local development. Broadly compatible with Docker Compose CLI and YAML semantics, but runs native processes instead of containers.

Design

Daemon architecture: decompose up spawns a background daemon per project. The daemon manages process lifecycles and communicates via local socket IPC (using the interprocess crate). The CLI is a thin client that sends JSON requests over the socket.
Instance identity: Each environment is identified by a SHA-256 hash of the config directory + file set, or by an explicit --session name (used verbatim as the ID; [A-Za-z0-9_-], max 64 chars). This allows multiple isolated environments and cross-tab targeting.
XDG paths: Sockets go to $XDG_RUNTIME_DIR/decompose/, state (pid, log) goes to $XDG_STATE_HOME/decompose/, with sensible fallbacks.

CLI

Goal: broad compatibility with docker compose commands. The main commands should feel familiar to Docker Compose users.

decompose [--file FILE...] [--session NAME] [-e ENV_FILE...] [--disable-dotenv] <command>

decompose up [-d] [--wait] [--foreground] [--no-deps] [SERVICE...]
decompose down
decompose ps
decompose logs [-f] [-n N] [SERVICE...]
decompose start [SERVICE...]
decompose stop [SERVICE...]
decompose restart [SERVICE...]
decompose kill [SERVICE...]
decompose config
decompose ls

up defaults to background startup with initialization/readiness waiting. Explicit -d skips the readiness wait unless combined with --wait. --foreground streams logs and owns a newly launched environment; it conflicts with -d, --wait, and --tui. --tui opens immediately unless --wait is explicit. --no-start skips the default wait and conflicts with --wait.

Global flags (--file, --session, -e/--env-file, --disable-dotenv) appear before the subcommand, matching docker compose -f FILE <cmd> shape.

Output modes: global --json or --table; text is always the default. Finite JSON results use schema 1.0; streams use JSON Lines. Diagnostics go to stderr through diagnostic.rs. output_model.rs owns public result types; IPC acknowledgments retain typed outcomes and legacy messages. See docs/cli-output.md for the migration and native-output exceptions.

Read the full file on GitHub · 243 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.

yesterday First seen · 243 lines · 2,434 tokens per session scan A a2c2abd3f8bf

Subscribe to this mod's changes

decompose CLAUDE.md is an instructions file published in the GitHub repository sciyoshi/decompose (7 stars, last pushed 12d ago), licensed Apache-2.0. It adds 2,434 tokens to every session, about $0.0097 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-11-07.

DevOps and cloud

decompose CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
decompose CLAUDE.mdsciyoshi/decompose	Instructions file	7	12d ago	Apache-2.0	A	2,434	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,516	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
vscode model-prompts.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	2,022	GitHub Copilot

decompose: Instructions file for Claude Code