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 skills/haabe/mycelium/diamond-rendernpx skills add haabe/mycelium --skill diamond-rendergit clone --depth 1 https://github.com/haabe/myceliumWrote 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/haabe/mycelium/diamond-render)<a href="https://agentmods.dev/skills/haabe/mycelium/diamond-render"><img src="https://agentmods.dev/badge/skills/haabe/mycelium/diamond-render.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 | $0.00075 | $0.03695 |
| Opus 5 | $0.00037 | $0.01847 |
| Sonnet 5 | $0.00015 | $0.00739 |
| Haiku 4.5 | $0.00007 | $0.00369 |
Grade A, and why
diamond-render 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 4d 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 — 266 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Diamond Render
Read-only render of .claude/diamonds/active.yml as a state diagram. First specialist of the render fleet. Other specialists (/mycelium:ost-render, /mycelium:cycle-render) and the dispatcher (/mycelium:render) ship in subsequent patches.
When NOT to use
- To advance a diamond (Discover → Define etc.) →
/mycelium:diamond-progress. - To score gates against current evidence →
/mycelium:diamond-assess. - To start a new diamond →
/mycelium:start.
Identifier exposure
Declared: NONE
Scope (canvas surfaces touched)
| Canvas file | Identifier-bearing fields | Frequency |
|---|---|---|
.claude/diamonds/active.yml |
none in current schema (v1) | n/a |
${CLAUDE_PLUGIN_ROOT}/engine/diamond-rules.md |
none (canonical phase list) | n/a |
Rationale
diamonds/active.yml is phase-state shape: scale (L0–L5), phase (Discover/Define/Develop/Deliver), confidence value, gate-history timestamps. No contributor names, no participant fields, no identifier-bearing prose. Zero identifier exposure as of v0.40.0.
Future-schema-change caveat: if a future schema adds an identifier field (e.g., per-team diamond ownership for multi-team Mycelium per the deferred Team Topologies adoption), this declaration becomes false. The skill must then be re-declared YES or MIXED, consult the registry per engine/render-conventions.md#hard-rule-consent--privacy-gate, and ship redaction fixtures. The schema-versioning rule surfaces the schema_version mismatch at runtime as a forcing function for the re-audit.
Anon-label convention
Not applicable (NONE).
Worked example
Render of diamonds/active.yml with no identifier content present:
L0 Purpose: [Discover]→[Define]→[Develop*]→[Deliver]
conf=0.612
No identifiers anywhere in the output, regardless of audience.
Fixture pointer
Not applicable. Check 43 forbids redaction fixtures on NONE-declared specialists (avoids the "declares NONE but acts YES" drift). Other fixtures (see § Test fixtures below) exercise actual behavior.
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.
- 4d ago First seen · 266 lines · 75 tokens per session scan A 395c3b749efe
diamond-render is a skill published in the GitHub repository haabe/mycelium (45 stars, last pushed today), licensed MIT. It adds 75 tokens to every session and 3,695 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 2026-08-30.
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