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 GuitarAlchemist/ga --skill what-can-you-dogit clone --depth 1 https://github.com/GuitarAlchemist/gaWrote 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/guitaralchemist/ga/what-can-you-do)<a href="https://agentmods.dev/skills/guitaralchemist/ga/what-can-you-do"><img src="https://agentmods.dev/badge/skills/guitaralchemist/ga/what-can-you-do/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/guitaralchemist/ga/what-can-you-do"><img src="https://agentmods.dev/badge/skills/guitaralchemist/ga/what-can-you-do.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 | $0.00084 | $0.01569 |
| Opus 5 | $0.00042 | $0.00785 |
| Sonnet 5 | $0.00017 | $0.00314 |
| Haiku 4.5 | $0.00008 | $0.00157 |
Grade A, and why
what-can-you-do 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 9d 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.
How it starts
The opening of the file, as written. The whole thing — 123 lines — stays where its author put it; the contents beside it link to each section on GitHub.
What the GA Chatbot Can Do
Reproduce this catalog verbatim when a visitor asks what the chatbot can do, what its capabilities are, or how to use it. This is the discoverability skill for the public surface at https://demos.guitaralchemist.com/chatbot/.
One-line answer
Guitar Alchemist's chatbot answers grounded music-theory questions — chord and scale lookup, progression analysis, voice leading, transposition, voicing search, and more. Every answer is computed from the GA symbolic engine, not recalled from training data.
What you can ask today
The chatbot ships exactly the capabilities below. (See "Roadmap" for items being designed but not yet wired — those will return a "feature not yet available" response if asked today.)
🎸 Chord and scale lookup
- "What notes are in Cmaj7?" — chord intervals and tones.
- "Notes in A natural minor" — scale degrees.
- "What are the modes of the major scale?" — modal pedagogy (catalog).
- "Show me beginner chords" — open-position starter catalogue.
🎼 Progressions
- "Identify the key of Em D C G" — key inference.
- "Suggest next chords for Cmaj7 Dm7 Em7" — completion.
- "How do I make this progression sound darker?" — modal mood-shifting (catalog).
- "What are the diatonic chords in G major?" — full I-vii table from
domain.diatonicChords.
🎚️ Fingerings & voicings
- "Compute the fret span of [diagram]" — playability scoring.
- "Drop 2 voicings of Cmaj7" — OPTIC-K voicing search (667k indexed shapes).
- "How do I finger Cmaj9?" — semantic voicing search via natural-language query.
- "Show me beginner chords" — open-position starter catalogue.
🔄 Movement & relationships
- "Compute the interval from C to G" — interval pair-lookup.
- "Transpose Cmaj7 up a perfect fifth" — deterministic chord transposition via
domain.transposeChord. - "What notes do Cmaj7 and Am7 share?" — common-tone identification with role mapping (root/3rd/5th/7th).
- "Substitutes for V7 in C major" — chord substitutions (Grothendieck-ICV).
- "Compare Cmaj7 with Am7" — chord-pair classification.
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.
- 9d ago First seen · 123 lines · 84 tokens per session scan A a3bb533ef1de
what-can-you-do is a skill published in the GitHub repository GuitarAlchemist/ga (2 stars, last pushed today), licensed MIT. It adds 84 tokens to every session and 1,569 once invoked, about $0.0004 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.
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