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 optic-k-schema-guardiangit 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/optic-k-schema-guardian)<a href="https://agentmods.dev/skills/guitaralchemist/ga/optic-k-schema-guardian"><img src="https://agentmods.dev/badge/skills/guitaralchemist/ga/optic-k-schema-guardian/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/optic-k-schema-guardian"><img src="https://agentmods.dev/badge/skills/guitaralchemist/ga/optic-k-schema-guardian.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 | $0.00034 | $0.00821 |
| Opus 5 | $0.00017 | $0.00411 |
| Sonnet 5 | $0.00007 | $0.00164 |
| Haiku 4.5 | $0.00003 | $0.00082 |
Grade A, and why
OPTIC-K Schema Guardian 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.
How it starts
The opening of the file, as written. The whole thing — 55 lines — stays where its author put it; the contents beside it link to each section on GitHub.
OPTIC-K Schema Guardian
This skill provides the definitive rules for the OPTIC-K Musical Embedding Schema, currently at version 1.6. Use this skill whenever modifying or evaluating the embedding generation pipeline, similarity scoring, or RAG indexing.
1. Schema Overview (v1.6)
The embedding vector consists of 216 dimensions partitioned into semantic subspaces.
| Partition | Range | Weight | Purpose |
|---|---|---|---|
| IDENTITY | 0-5 | N/A | Object type (Voicing, Scale, etc.). Hard filtering only. |
| STRUCTURE | 6-29 | 0.45 | Pitch-class set invariants (O+P+T+I). Core musical identity. |
| MORPHOLOGY | 30-53 | 0.25 | Physical fretboard realization (geometry/fingering). |
| CONTEXT | 54-65 | 0.20 | Temporal motion and harmonic functionality. |
| SYMBOLIC | 66-77 | 0.10 | Manual tags (Drop-2, Hendrix-style, etc.). |
| EXTENSIONS | 78-95 | N/A | Informational textural features (Register, Spread, Density). |
| SPECTRAL | 96-108 | N/A | DFT-based geometry (Phase spheres, Entropy). |
| MODAL | 109-148 | 0.10* | Modal flavors (28 family modes + Pentatonic/Symmetric). |
| HIERARCHY | 149-156 | N/A | Structural complexity and nesting depth. |
| RESERVED | 157-215 | N/A | Future expansion (Symbolic knowledge graphs). |
Note: MODAL weight is typically rolled into SYMBOLIC similarity scoring.
2. Validation Rules
Identity Guard
- Index 0-5 must be a one-hot vector indicating the object type.
- Similarity search MUST NOT include these indices unless filtering.
Structure (The "Pitch Circle" Rules)
- Chroma (6-17): 12-bit vector for pitch class presence.
- ICV (19-24): Interval Class Vector.
- Consonance (29): Calculated via the
IntervalClassVector. High IC5/IC3 increases this value.
Morphology (The "Guitar" Rules)
- Note Count (48): Normalized to a 6-string limit (
total / 6.0). - Span (33): Normalized to 4 octaves (
span / 48.0).
Extension Formulae
If editing MusicalEmbeddingGenerator.cs, ensure these specific formulae are maintained:
- Harmonic Inertia:
Stability * (1.0 - Tension) - Resolution Pressure:
(0.7 * Tension) + (0.3 * (1.0 - Stability))
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 · 55 lines · 34 tokens per session scan A 9d1324712ce5
OPTIC-K Schema Guardian is a skill published in the GitHub repository GuitarAlchemist/ga (2 stars, last pushed today), licensed MIT. It adds 34 tokens to every session and 821 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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