compose:plan

compose:plan is a skill for Claude Code, Codex from XiaomiMiMo/MiMo-Code. It costs 21 tokens per session (1,845 once invoked), scanned A, original, MIT.

A planning guide for turning a multi-step software requirement into a detailed sequence of implementation tasks.

In plain words
What is it for?
Planning features, breaking large requirements into smaller tasks, and recording implementation plans for later execution.
Why use it?
It gives developers who do not know the codebase a clear map of files, tests, documentation, and checks to consider.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions subagents.

Good fit Planning features, breaking large requirements into smaller tasks, and recording implementation plans for later execution.

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Install with agentmods
npx agentmods add skills/xiaomimimo/mimo-code/plan
About the project

MiMoCode is a terminal-based AI coding assistant that reads and writes code, runs commands, manages Git, and remembers project context across sessions. Developers use it to work with software projects through a command-line interface and connect it to language-model providers; the catalogue includes skills and instructions for it.

XiaomiMiMo/MiMo-Code · 12,997 stars · on GitHub · mimo.xiaomi.com

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.

Any agent
npx skills add XiaomiMiMo/MiMo-Code --skill plan
Clone the repo
git clone --depth 1 https://github.com/XiaomiMiMo/MiMo-Code

Made for: Claude Code, Codex.

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 compose:plan

README.md
[![agentmods](https://agentmods.dev/badge/skills/xiaomimimo/mimo-code/plan/github.svg)](https://agentmods.dev/skills/xiaomimimo/mimo-code/plan)
Your own site
<a href="https://agentmods.dev/skills/xiaomimimo/mimo-code/plan"><img src="https://agentmods.dev/badge/skills/xiaomimimo/mimo-code/plan/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.

agentmods 80×15 button for compose:plan

Your own site · 80×15
<a href="https://agentmods.dev/skills/xiaomimimo/mimo-code/plan"><img src="https://agentmods.dev/badge/skills/xiaomimimo/mimo-code/plan.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,845 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 5.1 $0.00021 $0.01845
Opus 5 $0.00010 $0.00923
Sonnet 5 $0.00004 $0.00369
Haiku 4.5 $0.00002 $0.00185

Measured 6d ago against content hash e274b94c8954, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

compose:plan 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 6d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

packages/opencode/src/skill/compose/.bundle/plan/SKILL.md · 183 lines

How it starts

The opening of the file, as written. The whole thing — 183 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Writing Plans

Overview

Write comprehensive implementation plans assuming the engineer has zero context for our codebase and questionable taste. Document everything they need to know: which files to touch for each task, code, testing, docs they might need to check, how to test it. Give them the whole plan as bite-sized tasks. DRY. YAGNI. TDD. Frequent commits.

Assume they are a skilled developer, but know almost nothing about our toolset or problem domain. Assume they don't know good test design very well.

Announce at start: "I'm using the compose:plan skill to create the implementation plan."

Context: If working in an isolated worktree, it should have been created via the compose:worktree skill at execution time.

Save plans to: the plans/ directory given in the <compose_docs_dir> block of your prompt, as YYYY-MM-DD-<feature-name>.md.

  • (User preferences for plan location override this default)

Scope Check

If the spec covers multiple independent subsystems, it should have been broken into sub-project specs during brainstorming. If it wasn't, suggest breaking this into separate plans — one per subsystem. Each plan should produce working, testable software on its own.

File Structure

Before defining tasks, map out which files will be created or modified and what each one is responsible for. This is where decomposition decisions get locked in.

  • Design units with clear boundaries and well-defined interfaces. Each file should have one clear responsibility.
  • You reason best about code you can hold in context at once, and your edits are more reliable when files are focused. Prefer smaller, focused files over large ones that do too much.
  • Files that change together should live together. Split by responsibility, not by technical layer.
  • In existing codebases, follow established patterns. If the codebase uses large files, don't unilaterally restructure - but if a file you're modifying has grown unwieldy, including a split in the plan is reasonable.

Read the full file on GitHub · 183 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 6d ago First seen · 183 lines · 21 tokens per session scan A e274b94c8954

Subscribe to this mod's changes

compose:plan is a skill published in the GitHub repository XiaomiMiMo/MiMo-Code (12,997 stars, last pushed yesterday), licensed MIT. It adds 21 tokens to every session and 1,845 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 2026-09-03.