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 skills add fspecii/openfelix --skill ace-musicgit clone --depth 1 https://github.com/fspecii/openfelixWrote 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/fspecii/openfelix/ace-music)<a href="https://agentmods.dev/skills/fspecii/openfelix/ace-music"><img src="https://agentmods.dev/badge/skills/fspecii/openfelix/ace-music/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/fspecii/openfelix/ace-music"><img src="https://agentmods.dev/badge/skills/fspecii/openfelix/ace-music.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 | $0.00064 | $0.00731 |
| Opus 5.5 | $0.00026 | $0.00292 |
| Sonnet 5.5 | $0.00013 | $0.00146 |
| Haiku 4.5 | $0.00006 | $0.00073 |
Grade A, and why
ace-music 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 2mo 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
## Advanced Usage (curl/direct API) The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
What ships with it
2 files 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.
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.
- 2mo ago First seen · 76 lines · 64 tokens per session scan A 99320ff9374e
ace-music is a skill published in the GitHub repository fspecii/openfelix (33 stars, last pushed 8mo ago), with no licence file. It adds 64 tokens to every session and 731 once invoked, about $0.0003 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 2026-08-30.
ace-music compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| ace-musicfspecii/openfelix | Skill | 33 | 8mo ago | none | A | 64 | Claude Code, Codex |
| cai-todaycai-layer/cai | Skill | 59 | 3d ago | MIT | A | 98 | Claude Code, Codex |
| localvoxtral-doctorT0mSIlver/localvoxtral | Skill | 63 | today | MIT | A | 59 | Claude Code |
| pulselinggen/skills | Skill | 3 | yesterday | Apache-2.0 | A | 132 | Claude Code |
| shared-memorylinggen/skills | Skill | 3 | yesterday | Apache-2.0 | A | 64 | Claude Code |
| djlinggen/skills | Skill | 3 | yesterday | Apache-2.0 | A | 101 | Claude Code |
| healthlinggen/skills | Skill | 3 | yesterday | Apache-2.0 | A | 91 | Claude Code |