Q00/ouroboros is an Agent OS for running coding agents through interviews, staged evaluation, and repeated improvement cycles. It helps developers turn vague requests into tested code across multiple agent runtimes. Its catalogue add-ons provide workflows, agents, hooks, instructions, and integrations for operating those processes.
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 Q00/ouroboros --skill statusgit 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/status)<a href="https://agentmods.dev/skills/q00/ouroboros/status"><img src="https://agentmods.dev/badge/skills/q00/ouroboros/status/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/q00/ouroboros/status"><img src="https://agentmods.dev/badge/skills/q00/ouroboros/status.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 | $0.00012 | $0.00591 |
| Opus 5.5 | $0.00005 | $0.00236 |
| Sonnet 5.5 | $0.00002 | $0.00118 |
| Haiku 4.5 | $0.00001 | $0.00059 |
Grade A, and why
ouroboros-status 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 2d 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.
/ouroboros:ouroboros-status
Check an execution session's status and, on request, measure drift from the Seed goal.
/ouroboros:ouroboros-status [session_id]
Instructions
Loading MCP tools (deferred-schema guard)
Ouroboros tools may be deferred, and a schema loaded on one turn can unload by the next. Immediately before each ouroboros_* call, load it with the active runtime's tool-discovery capability: "+ouroboros session status" for ouroboros_session_status and ouroboros_measure_drift. A call whose schema is not loaded fails with "Invalid tool parameters". If the tool is already callable, discovery is a no-op and an empty result is expected. Use the fallback only when the tool is genuinely absent.
Steps
-
Session: use the given
session_id, else the most recent one in the conversation, else ask the user. -
Call
ouroboros_session_statusMCP tool:Tool: ouroboros_session_status Arguments: session_id: <session ID> -
If the user asks about drift (or says "am I drifting?"), also call
ouroboros_measure_drift:Tool: ouroboros_measure_drift Arguments: session_id: <session ID> current_output: <current execution output or file contents> seed_content: <original seed YAML> constraint_violations: [] (any known violations) current_concepts: [] (concepts in current output) -
Show the status and progress, and the drift report as the tool renders it (weights, threshold, breakdown, suggestions). When combined drift exceeds 0.3 (status
EXCEEDED), warn and suggestooo interviewto re-clarify orooo evolveto course-correct; otherwise suggest continuing withooo runorooo evaluate.
Fallback (no MCP server)
Tell the user session tracking needs the Ouroboros MCP server (ooo setup), and that without it they can compare the implementation against the Seed by hand.
RFC #1392 State Breadcrumb Footer
End the final response with exactly one line ◆ <current state> → next: <recommended action>. Derive the state from live session state via ouroboros_session_status when available, otherwise from this skill's actual outcome. Never use a linear Step N of M footer; when the next step is a real choice, list 2-3 options.
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.
- 2d ago Changed · -78 lines 121d7af9aa55
- 1mo ago Changed · +10 lines fc6631532997
- 1mo ago First seen · 123 lines · 12 tokens per session scan A ef19e086db8a
ouroboros-status is a skill published in the GitHub repository Q00/ouroboros (6,243 stars, last pushed today), licensed MIT. It adds 12 tokens to every session and 591 once invoked, about $0.0000 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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