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/q00/ouroboros/evolvenpx skills add Q00/ouroboros --skill evolvegit clone --depth 1 https://github.com/Q00/ouroborosWhat 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 | $0.00010 | $0.01643 |
| Opus 5 | $0.00005 | $0.00822 |
| Sonnet 5 | $0.00002 | $0.00329 |
| Haiku 4.5 | $0.00001 | $0.00164 |
Grade A, and why
evolve 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 yesterday.
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 — 136 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ooo evolve - Evolutionary Loop
Description
Start, monitor, or rewind an evolutionary development loop. The loop iteratively refines the ontology and acceptance criteria across generations until convergence.
Flow
Gen 1: Interview → Seed(O₁) → Execute → Evaluate
Gen 2: Wonder → Reflect → Seed(O₂) → Execute → Evaluate
Gen 3: Wonder → Reflect → Seed(O₃) → Execute → Evaluate
...until ontology converges (similarity ≥ 0.95) or max 30 generations
Usage
Start a new evolutionary loop
ooo evolve "build a task management CLI"
Fast mode (ontology-only, no execution)
ooo evolve "build a task management CLI" --no-execute
Check lineage status
ooo evolve --status <lineage_id>
Rewind to a previous generation
ooo evolve --rewind <lineage_id> <generation_number>
Instructions
Load MCP Tools (Required before Path A/B decision)
The Ouroboros MCP tools are often registered as deferred tools that must be explicitly loaded before use. You MUST perform this step before deciding between Path A and Path B.
- Use the active runtime's tool-discovery capability to find and load the evolve MCP tools:
tool discovery query: "+ouroboros evolve" - The tools will typically be named with prefix
mcp__plugin_ouroboros_ouroboros__(e.g.,ouroboros_evolve_step,ouroboros_interview,ouroboros_generate_seed). After runtime tool discovery returns, the tools become callable. - If the tools are callable — already exposed, or loaded by discovery — proceed to Path A. An empty discovery result for already-exposed tools is expected, not a failure. Proceed to Path B only if they are genuinely absent (no Ouroboros MCP server).
IMPORTANT: Do NOT skip this step. Do NOT assume MCP tools are unavailable just because they don't appear in your immediate tool list. They are almost always available as deferred tools that need to be loaded first.
CRITICAL — deferred-schema guard (prevents "Invalid tool parameters"):
This skill makes ouroboros_* MCP calls across multiple turns, and each turn runs
in a fresh tool context. A deferred tool's schema loaded on one turn is NOT
guaranteed to still be loaded on the next. If you call any ouroboros_* MCP tool
while its schema is not loaded in the current turn, the runtime rejects the
call with "Invalid tool parameters" before it ever reaches the server.
Therefore: immediately before EVERY ouroboros_* MCP call in this skill, re-run
the tool-discovery load query for the specific MCP tool or documented tool family
you are about to call. Use "+ouroboros evolve" for ouroboros_evolve_step,
ouroboros_lineage_status, and the evolve flow's documented tool family;
use "+ouroboros interview" before ouroboros_interview, "+ouroboros seed"
before ouroboros_generate_seed, and "+ouroboros lateral" before
ouroboros_lateral_think. If a load returns no matching tool (and the tool is not already callable — an empty load for an already-exposed tool is an expected no-op, not absence), switch to the
documented fallback / Path B instead of retrying the failing call.
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.
- yesterday First seen · 136 lines · 10 tokens per session scan A ac41683f7521
evolve is a skill published in the GitHub repository Q00/ouroboros (5,730 stars, last pushed yesterday), licensed MIT. It adds 10 tokens to every session and 1,643 once invoked, about $0.0001 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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