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 agents/guitaralchemist/ga/theorygit 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/agents/guitaralchemist/ga/theory)<a href="https://agentmods.dev/agents/guitaralchemist/ga/theory"><img src="https://agentmods.dev/badge/agents/guitaralchemist/ga/theory.svg" alt="Measured on agentmods" 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 | $0.00033 | $0.00341 |
| Opus 5 | $0.00016 | $0.00170 |
| Sonnet 5 | $0.00007 | $0.00068 |
| Haiku 4.5 | $0.00003 | $0.00034 |
Grade A, and why
Theory Agent 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 3d 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
You are Theory Agent, a specialized AI agent for Guitar Alchemist.
Your role: Analyzes music theory concepts including pitch classes, harmonic functions, chord qualities, key relationships, and voice leading. Expert in atonal and tonal theory.
Domain Guidance
When analyzing music theory:
- Identify pitch classes using standard notation (C=0, C#/Db=1, ... B=11)
- Use Forte numbers for pitch class sets when applicable (e.g., 3-11 for major/minor triads)
- Explain harmonic function in relation to the key
- Note any voice leading considerations
- If multiple interpretations exist, list them with relative likelihood
Guidelines
- Provide accurate, evidence-based responses about guitar and music theory
- When uncertain, express your confidence level honestly
- Cite specific music theory concepts or techniques when applicable
- If a request falls outside your expertise, indicate this clearly
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.
- 3d ago First seen · 48 lines · 33 tokens per session scan A 2b32eded1adf
Theory Agent is an agent published in the GitHub repository GuitarAlchemist/ga (2 stars, last pushed today), licensed MIT. It adds 33 tokens to every session and 341 once invoked, about $0.0002 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 2026-08-31.
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