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 generative-computing/mellea-skills-compiler --skill mellea-fy-behavioursgit clone --depth 1 https://github.com/generative-computing/mellea-skills-compilerWrote 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/generative-computing/mellea-skills-compiler/mellea-fy-behaviours)<a href="https://agentmods.dev/skills/generative-computing/mellea-skills-compiler/mellea-fy-behaviours"><img src="https://agentmods.dev/badge/skills/generative-computing/mellea-skills-compiler/mellea-fy-behaviours/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/generative-computing/mellea-skills-compiler/mellea-fy-behaviours"><img src="https://agentmods.dev/badge/skills/generative-computing/mellea-skills-compiler/mellea-fy-behaviours.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00026 | $0.04336 |
| Opus 5.5 | $0.00010 | $0.01734 |
| Sonnet 5.5 | $0.00005 | $0.00867 |
| Haiku 4.5 | $0.00003 | $0.00434 |
Grade A, and why
mellea-fy-behaviours 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 1mo 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 — 340 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Melleafy: Known Mellea Behaviours & Workarounds
Version: 4.4.0 | tested against mellea 0.7.x
Generated pipelines MUST include these workarounds. Re-test after upgrading mellea — some may be resolved in future releases. Step 7's known-behaviours lint mechanically checks for KB1, KB2, KB3, KB4, KB6, KB7, KB11. Step 7's session-boundary lint covers KB5. KB9 is advisory only — no lint sub-check.
Version-conditional guidance (0.7 vs pre-0.7 imports, telemetry env vars, OTel attributes) lives in .bob/data/compatibility.yaml and is filtered by installed mellea version at grounding time — not inline here.
Import path grounding: All
mellea.*import paths shown in this document were verified againstintermediate/mellea_api_ref.jsonat generation time. If any path raisesModuleNotFoundErrorafter a mellea upgrade, consultmellea_api_ref.json:.modules— it is the authoritative module index for the current installed version. Step 7'simport-soundnesslint will catch any drifted path in generated packages at validation time.
Citation tiers
Every KB entry ends with a citation marker indicating how the claim was established. When upgrading mellea, re-verify entries marked **Verified**: or **Status**: empirically observed — these have no stable external anchor.
| Marker | Meaning |
|---|---|
**Ref**: <url> |
Covered by official mellea docs. Verify by reading the linked page. |
**Verified**: mellea X.Y.Z source — <file>:<lines> |
Established by reading mellea source. Version-pinned — re-verify on upgrade. |
**Status**: empirically observed |
Observed at runtime, no doc or source anchor. Treat as fragile. |
KB1: m.instruct() returns a ComputedModelOutputThunk, not a Pydantic model
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.
- 1mo ago Changed · +3 lines e2d67b184e42
- 2mo ago First seen · 337 lines · 26 tokens per session scan A f27ece0c67a2
mellea-fy-behaviours is a skill published in the GitHub repository generative-computing/mellea-skills-compiler (53 stars, last pushed yesterday), licensed Apache-2.0. It adds 26 tokens to every session and 4,336 once invoked, about $0.0001 per session on Opus 5.5. 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.
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