Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add kennethleungty/claude-music/plugin install claude-musicWrote 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.
[](https://agentmods.dev/skills/kennethleungty/claude-music/focus)<a href="https://agentmods.dev/skills/kennethleungty/claude-music/focus"><img src="https://agentmods.dev/badge/skills/kennethleungty/claude-music/focus/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.
<a href="https://agentmods.dev/skills/kennethleungty/claude-music/focus"><img src="https://agentmods.dev/badge/skills/kennethleungty/claude-music/focus.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00015 | $0.00168 |
| Opus 5 | $0.00008 | $0.00084 |
| Sonnet 5 | $0.00003 | $0.00034 |
| Haiku 4.5 | $0.00002 | $0.00017 |
Grade A, and why
focus scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
This skill is part of the claude-music plugin. Only invoke when the user explicitly uses the slash command.
Focus Timer
Start a pomodoro focus session with music. Music fades out when time's up.
Run "${CLAUDE_PLUGIN_ROOT}/scripts/music-controller.sh" pomodoro $ARGUMENTS (args: optional minutes then optional genre, e.g. 30 jazz).
- If
"status": "pomodoro_started": ♪ Focus mode: {duration_minutes} min — {genre} · {station}. Music will fade out when time's up. ♪
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.
- 11d ago First seen · 19 lines · 15 tokens per session scan A a6ae211c5a08
focus is a skill published in the GitHub repository kennethleungty/claude-music (21 stars, last pushed 5mo ago), licensed MIT. It adds 15 tokens to every session and 168 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 skills, from other repositories
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MetaBot's persistent server-side scheduler (cron + one-shot). Optional skill — not installed by default. Use when the user wants tasks that survive Claude session restarts, are visible to other bots, or need to run in MetaBot's PM2 process rather than this Claude session.
skill-dict
Use when the user types /skill-dict, asks about their personal skill library at /skills-library/, asks "what does do" about a library entry, asks to sync the library after installing a plugin, or asks to add a skill to the library.
triggers
Set up, list, or manage triggers — persistent "do Y when X happens" rules. Use when someone asks Archie to do something on a schedule ("every weekday at 9am…", "every morning post…", "remind the channel weekly…"), to react to new messages in a channel ("whenever someone posts X in.
thread-conduct
Use before posting anywhere outside this task's own thread, or when deciding how much to post inside it. Covers keeping one task in one thread, what to do with a finding that belongs to another team, when a cross-channel post is allowed and how small it must be, how much traffic a thread should carry, and how to…
apple-notes
Manage Apple Notes via memo CLI: create, search, edit.
keybindings-help
Use when the user wants to customize keyboard shortcuts, rebind keys, add chord bindings, or modify /.claude/keybindings.json. Examples: "rebind ctrl+s", "add a chord shortcut", "change the submit key", "customize keybindings".