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 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/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/run"><img src="https://agentmods.dev/badge/skills/q00/ouroboros/run.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 3 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Rogue Agent · line 69 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
- medium Excessive Agency · line 378 Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
- medium Excessive Agency · line 476 Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
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 | $0.00073 | $0.03341 |
| Opus 5.5 | $0.00029 | $0.01336 |
| Sonnet 5.5 | $0.00015 | $0.00668 |
| Haiku 4.5 | $0.00007 | $0.00334 |
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 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 — 236 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 as a background job. A completed run enqueues formal evaluation by default, and a rejection continues through a bounded Ralph loop.
Usage
/ouroboros:ouroboros-run [seed_file_or_content]
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 execute" for ouroboros_start_execute_seed, ouroboros_job_wait, ouroboros_job_result, and ouroboros_ac_tree_hud; "+ouroboros session signal" for ouroboros_session_signal_targets and ouroboros_session_signal. 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 (No MCP Server) section only when the tools are genuinely absent.
Execution Steps
-
Do not create or switch branches yourself. For a background execution job,
use_worktreedefaults to true: the server runs the task in its own worktree and reportsworktree_path/worktree_branchin the job result. Tell the user the task was isolated only when those fields are present. Adispatch_mode="plugin"response delegates to a child session and carries no worktree. -
Get the Seed. Read a given file path with the active runtime's
inspect_codecapability, use inline YAML directly, or otherwise take the most recently generated Seed in the conversation.Before a fresh start, do not ask about an efficiency policy unless the user raised it or
execution.default_policyin~/.ouroboros/config.yamlis explicitlyask. Otherwise omit both arguments: the server applies the configured default (quality-first when nothing is configured), and its start receipt names the running policy and the change command. If the user did choose, or the config saysask, map the choice in outcome language:
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 · -326 lines · +60 tokens per session 5e65778dfc35
- 1mo ago Changed · +162 lines 936bb2699d81
- 1mo ago First seen · 400 lines · 13 tokens per session scan A 6647958c3eab
ouroboros-run is a skill published in the GitHub repository Q00/ouroboros (6,243 stars, last pushed today), licensed MIT. It adds 73 tokens to every session and 3,341 once invoked, about $0.0003 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.
Other skills, from other repositories
animate
Build a web animation: whether it should animate at all, the purpose, the tool, the properties, the easing curve, the duration, interruption and exit. Writes the CSS or Motion code for dropdowns, modals, toasts, tooltips, accordions, press feedback, stagger and scroll reveals. Use to animate something or make a…
building-agents
Use when building or restructuring an LLM agent — provider adapter, tool calling, structured output, RAG, agent loop, eval gate, cost routing, tracing, MCP server — model-agnostic across OpenAI/Anthropic/Gemini/OSS so a model swap is a config change. NOT vector-store SQL alone (that is postgresdb) or service…
marketing
Use when the words span a marketing surface — value proposition, section copy, microcopy, launch and email sequences, channel adaptation, SEO-aware structure — grounded in the brand study, which it stops and builds if missing. NOT one conversion page (that is landing-copy), NOT tone rules (that is brand-voice), NOT…
postgresdb
Use when PostgreSQL engine behaviour decides the answer — schema and type design, index choice, reading EXPLAIN on a slow query, zero-downtime DDL and backfills, or ops (roles, RLS, pooling, vacuum, partitioning, PITR). PG16, ORM-agnostic. NOT portable query logic (that is sql), NOT a managed provider's platform…
brand-voice
Use when defining how a brand SOUNDS as a reusable system: adjectives turned into linguistic rules, four tone dimensions as ratios, a use/avoid word bank, an AI voice-DNA block — so content stops sounding like five different writers. NOT the finished copy written against it (that is landing-copy / marketing), NOT the…
community
Use when building or running a persistent two-way community space — Discord, Telegram, Circle: platform choice, structure, onboarding, native→bot→human moderation, rituals, growth loops, health metrics. NOT churn of paying product customers (that is retention), NOT broadcast email (that is newsletter), NOT one live…