compact

compact is a command for Claude Code from Yeachan-Heo/oh-my-claudecode. It costs 14 tokens per session (410 once invoked), scanned A, original, MIT.

A helper command that prepares a Claude Code conversation for manual context compaction, meaning shortening the conversation so work can continue within the available context. It tells you to run Claude Code's built-in `/compact` command.

In plain words
What is it for?
Use it before manually compacting a conversation, especially when you want to pass a specific note into the compaction.
Why use it?
It prevents confusion between OMC's helper and Claude Code's native compaction command while preserving any note you want included.

Command for Claude Code

Written for Claude Code: argument-hint in frontmatter. Also seen: mentions Claude Code.

Part of the oh-my-claudecode plugin — 48 skills, 21 commands, 19 agents, 11 hooks, 1 MCP server shipped together

Good fit Use it before manually compacting a conversation, especially when you want to pass a specific note into the compaction.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/yeachan-heo/oh-my-claudecode/compact
About the project

Oh My Claude Code is a multi-agent orchestration system for Claude Code, coordinating specialized agents, commands, skills, hooks, and workflows. It is designed for developers who want Claude Code to handle coding tasks through coordinated agent roles. Catalogue entries are components of its Claude Code workflow, including agents, commands, skills, hooks, instructions, MCP configuration, and a plugin.

Yeachan-Heo/oh-my-claudecode · 40,209 stars · on GitHub · oh-my-claudecode.dev

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.

Clone the repo
git clone --depth 1 https://github.com/Yeachan-Heo/oh-my-claudecode

Made for: Claude Code.

Or install oh-my-claudecode, the plugin that ships this one along with the rest of its 48 skills, 21 commands, 19 agents, 11 hooks, 1 MCP server.

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 compact

README.md
[![agentmods](https://agentmods.dev/badge/commands/yeachan-heo/oh-my-claudecode/compact/github.svg)](https://agentmods.dev/commands/yeachan-heo/oh-my-claudecode/compact)
Your own site
<a href="https://agentmods.dev/commands/yeachan-heo/oh-my-claudecode/compact"><img src="https://agentmods.dev/badge/commands/yeachan-heo/oh-my-claudecode/compact/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 compact

Your own site · 80×15
<a href="https://agentmods.dev/commands/yeachan-heo/oh-my-claudecode/compact"><img src="https://agentmods.dev/badge/commands/yeachan-heo/oh-my-claudecode/compact.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 14 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 410 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.
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 $0.00014 $0.00410
Opus 5.5 $0.00006 $0.00164
Sonnet 5.5 $0.00003 $0.00082
Haiku 4.5 $0.00001 $0.00041

Measured 1mo ago against content hash 43215472efda, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

compact 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 1mo 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:

  • compact — 97% identical, 2 lines differ
commands/compact.md · 36 lines

What it actually says

OMC Manual Context Compaction Helper

This command intentionally uses the plugin-scoped name /oh-my-claudecode:compact instead of the bare /compact command. Bare /compact is reserved for Claude Code's native compaction command and must not be shadowed by OMC.

OMC cannot invoke Claude Code's built-in /compact from a plugin command: /compact is a native slash command, not a prompt skill, and a prompt-skill call for compact is not a supported handoff. This helper is instruction-only and must not claim that OMC triggers compaction itself.

Dispatch

  1. Treat this as a request to prepare for manual Claude Code conversation compaction. Do not create a separate OMC summarizer and do not replace existing auto-compress behavior.
  2. Preserve any user note for the compaction request:
$ARGUMENTS
  1. Tell the user to run Claude Code's built-in bare /compact command directly. If the note above is non-empty, tell them to include it with /compact.
  2. Before handing off, remind the user that Claude Code's normal PreCompact lifecycle should run OMC's existing pre-compact hooks (pre-compact, project memory, and wiki preservation) when the native compaction occurs.
  3. Do not invoke a compact skill, do not attempt to call /compact on the user's behalf, and do not manually summarize the session.

User-facing handoff

Use this wording, adapting only the note text:

OMC prepared the compaction context, but plugin commands cannot trigger Claude Code's native /compact directly. Run this as a bare Claude Code command now:

/compact $ARGUMENTS

Bare /compact remains Claude Code's native command; OMC does not shadow or invoke it.
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. 1mo ago First seen · 36 lines · 14 tokens per session scan A 43215472efda

Subscribe to this mod's changes

compact is a command published in the GitHub repository Yeachan-Heo/oh-my-claudecode (40,209 stars, last pushed today), licensed MIT. It adds 14 tokens to every session and 410 once invoked, about $0.0001 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.