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 seedgit 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/seed)<a href="https://agentmods.dev/skills/q00/ouroboros/seed"><img src="https://agentmods.dev/badge/skills/q00/ouroboros/seed/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/seed"><img src="https://agentmods.dev/badge/skills/q00/ouroboros/seed.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 3 findings, up to high
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 →
- high Prompt Injection · line 45 Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
- medium Agent Snooping · line 200 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Rogue Agent · line 338 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.
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 | $0.00069 | $0.03576 |
| Opus 5.5 | $0.00028 | $0.01430 |
| Sonnet 5.5 | $0.00014 | $0.00715 |
| Haiku 4.5 | $0.00007 | $0.00358 |
Grade A, and why
seed 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 22d 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 — 211 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/ouroboros:seed
Generate a validated Seed specification from an interview or from requirements this conversation already settled.
Required Skill Capabilities
ask_user (the active runtime's user-question surface), inspect_code, call_mcp, orchestrate_subagents (lateral persona payloads), run_shell (audit-trail and prefs writes), refine_answer (confirm free-form decisions), maintain_ledger (QA scores, candidate decisions, rejected proposals).
Usage
ooo seed [session_id]
/ouroboros:seed [session_id]
Instructions
Python Runtime (Required)
Define this resolver in the same shell before running any shell snippet below, and call ouroboros_python with every argument quoted. It accepts only Python 3.12 or newer and falls back to uv.
ouroboros_python() {
if command -v python3 >/dev/null 2>&1 &&
(unset PYTHONHOME PYTHONPATH PYTHONPLATLIBDIR PYTHONEXECUTABLE __PYVENV_LAUNCHER__; command python3 -c 'import sys; raise SystemExit(sys.version_info < (3, 12))') >/dev/null 2>&1
then
(unset PYTHONHOME PYTHONPATH PYTHONPLATLIBDIR PYTHONEXECUTABLE __PYVENV_LAUNCHER__; command python3 "$@")
return
fi
if command -v python >/dev/null 2>&1 &&
(unset PYTHONHOME PYTHONPATH PYTHONPLATLIBDIR PYTHONEXECUTABLE __PYVENV_LAUNCHER__; command python -c 'import sys; raise SystemExit(sys.version_info < (3, 12))') >/dev/null 2>&1
then
(unset PYTHONHOME PYTHONPATH PYTHONPLATLIBDIR PYTHONEXECUTABLE __PYVENV_LAUNCHER__; command python "$@")
return
fi
if command -v uv >/dev/null 2>&1; then
(unset PYTHONHOME PYTHONPATH PYTHONPLATLIBDIR PYTHONEXECUTABLE __PYVENV_LAUNCHER__; command uv run --no-project --quiet --python '>=3.12' python "$@")
return
fi
printf '%s\n' 'Ouroboros skills require Python >= 3.12 or uv on PATH.' >&2
return 127
}
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 seed" for ouroboros_generate_seed; "+ouroboros qa" for ouroboros_qa; "+ouroboros lateral" for ouroboros_lateral_think. 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.
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.
- 22d ago Changed · -299 lines · +60 tokens per session 8993f89b07e9
- 2mo ago Changed · +24 lines 4ebbb3486384
- 2mo ago Changed · +17 lines a101c39525c5
- 2mo ago First seen · 469 lines · 9 tokens per session scan A f1e78a0bbd0d
seed is a skill published in the GitHub repository Q00/ouroboros (6,334 stars, last pushed yesterday), licensed MIT. It adds 69 tokens to every session and 3,576 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.
seed compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| seedQ00/ouroboros | Skill | 6.3k | yesterday | MIT | A | 69 | Claude Code |
| animateericrisco/rsc-harness | Skill | 529 | 4d ago | MIT | A | 75 | Claude Code, Codex |
| building-agentsericrisco/rsc-harness | Skill | 529 | 4d ago | MIT | A | 85 | Claude Code, Codex |
| marketingericrisco/rsc-harness | Skill | 529 | 4d ago | MIT | A | 78 | Claude Code, Codex |
| postgresdbericrisco/rsc-harness | Skill | 529 | 4d ago | MIT | A | 91 | Claude Code, Codex |
| brand-voiceericrisco/rsc-harness | Skill | 529 | 4d ago | MIT | A | 81 | Claude Code, Codex |
| communityericrisco/rsc-harness | Skill | 529 | 4d ago | MIT | A | 77 | Claude Code, Codex |