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/runnpx skills add Q00/ouroboros --skill rungit clone --depth 1 https://github.com/Q00/ouroborosWrote 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/q00/ouroboros/run)<a href="https://agentmods.dev/skills/q00/ouroboros/run"><img src="https://agentmods.dev/badge/skills/q00/ouroboros/run.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 | $0.00013 | $0.06221 |
| Opus 5 | $0.00006 | $0.03111 |
| Sonnet 5 | $0.00003 | $0.01244 |
| Haiku 4.5 | $0.00001 | $0.00622 |
Grade A, and why
ouroboros-run 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 — 562 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/ouroboros:ouroboros-run
Execute a Seed specification through the Ouroboros workflow engine.
Usage
/ouroboros:ouroboros-run [seed_file_or_content]
Trigger keywords: "ouroboros run", "execute seed"
How It Works
- Input: Provide seed YAML content directly or a path to a
.yamlfile - Validation: Seed is parsed and validated (goal, constraints, acceptance criteria, ontology)
- Execution: The orchestrator runs the workflow with PAL routing
- Progress: Real-time progress updates via session tracking
- Result: Execution summary with pass/fail status
- Convergence: completed runs enqueue formal evaluation by default. An explicit rejection continues through a bounded Ralph loop until approved or the configured evolution budget/stop condition is reached.
Instructions
When the user invokes this skill:
Load MCP Tools (Required first)
The Ouroboros MCP tools are often registered as deferred tools that must be explicitly loaded before use. You MUST perform this step before proceeding.
- Use the active runtime's tool-discovery capability to find and load the execution MCP tools:
tool discovery query: "+ouroboros execute" - The tools will typically be named with prefix
mcp__plugin_ouroboros_ouroboros__(e.g.,ouroboros_execute_seed,ouroboros_session_status). After runtime tool discovery returns, the tools become callable. - If the tools are callable — already exposed, or loaded by discovery — proceed with the steps below. An empty discovery result for already-exposed tools is expected, not a failure. Skip to the Fallback section 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 execution 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 execution ouroboros_*
MCP tool while its schema is not loaded in the current turn, the runtime
rejects the call with "Invalid tool parameters" before it reaches the server.
Therefore: immediately before EVERY execution MCP call in this skill, re-run
tool discovery query: "+ouroboros execute" to reload the execution tool family,
including ouroboros_start_execute_seed, ouroboros_job_wait,
ouroboros_ac_tree_hud, and ouroboros_job_result (idempotent — a no-op when
already loaded). If the 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 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 Changed · +162 lines 936bb2699d81
- 4d ago First seen · 400 lines · 13 tokens per session scan A 6647958c3eab
ouroboros-run is a skill published in the GitHub repository Q00/ouroboros (5,765 stars, last pushed today), licensed MIT. It adds 13 tokens to every session and 6,221 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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