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.
npx agentmods add commands/yeachan-heo/oh-my-claudecode/compactgit clone --depth 1 https://github.com/Yeachan-Heo/oh-my-claudecodeWhat 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 | $0.00014 | $0.00410 |
| Opus 5 | $0.00007 | $0.00205 |
| Sonnet 5 | $0.00003 | $0.00082 |
| Haiku 4.5 | $0.00001 | $0.00041 |
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 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.
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
- 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.
- Preserve any user note for the compaction request:
$ARGUMENTS
- Tell the user to run Claude Code's built-in bare
/compactcommand directly. If the note above is non-empty, tell them to include it with/compact. - Before handing off, remind the user that Claude Code's normal
PreCompactlifecycle should run OMC's existing pre-compact hooks (pre-compact, project memory, and wiki preservation) when the native compaction occurs. - Do not invoke a
compactskill, do not attempt to call/compacton 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.
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 · 36 lines · 14 tokens per session scan A 43215472efda
compact is a command published in the GitHub repository Yeachan-Heo/oh-my-claudecode (38,897 stars, last pushed yesterday), licensed MIT. It adds 14 tokens to every session and 410 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 2026-08-30.
Other commands, from other repositories
models-preset
Show current OMO model assignments in markdown tables.
session-info
Copy project path, session title, and session ID to clipboard (no LLM round-trip).
session-id
Copy the invoking session ID to clipboard (no LLM round-trip).
vscode
Open VS Code in the current project/worktree directory.
project
Generate project documentation (product.md, structure.md, tech.md, codemaps/).
version
Display current guide and Claude Code versions.