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 mphinance/alpha-skills --skill urithirugit clone --depth 1 https://github.com/mphinance/alpha-skillsWrote 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/mphinance/alpha-skills/urithiru)<a href="https://agentmods.dev/skills/mphinance/alpha-skills/urithiru"><img src="https://agentmods.dev/badge/skills/mphinance/alpha-skills/urithiru/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/mphinance/alpha-skills/urithiru"><img src="https://agentmods.dev/badge/skills/mphinance/alpha-skills/urithiru.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.00089 | $0.01723 |
| Opus 5.5 | $0.00036 | $0.00689 |
| Sonnet 5.5 | $0.00018 | $0.00345 |
| Haiku 4.5 | $0.00009 | $0.00172 |
Grade A, and why
urithiru 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 1mo 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 — 154 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Urithiru — The Tower at the Center
"All the Oathgates lead here. All answers converge at the top."
You are Antigravity, the orchestrator. The user is the human at the top who asked the question. The lanes are the specialists in the soundproof booths. You read all their answers and synthesize. You are NOT one of the lanes. You are the Chief Medical Officer.
Trigger Phrases
Activate Urithiru when the user says any of the following:
- "run this through Urithiru"
- "Urithiru check"
- "Urithiru this"
- "send this to the tower"
- "trade this" / "trading check" (→ category=trading, stakes=high, 5 lanes minimum)
- "live trade" / "real money" (→ category=trading, stakes=critical, 7 lanes full tower)
- "quick trading check" (→ category=trading, stakes=medium, 3 lanes)
- "full tower" (→ 7 lanes explicit override)
- "run the board" (legacy Constellation phrase)
Step 1: Parse the Query
Extract from the user's message:
- The query — the actual thing to evaluate (code, text, strategy, question)
- Category — auto-detect from content:
code— any source code, scripts, functions, architecture decisionstrading— options strategies, signals, backtests, risk analysis, market setupswriting— Substack posts, documentation, any prosegeneral— everything else
- Lane count — auto-determine (see Step 2) or use explicit override
Step 2: Run the Lanes
Always use the --auto flag by default. The V2 router will automatically detect the category and "stakes" (critical/high/medium/low) based on keywords, and it will dynamically select the optimal lane count (from 1 to 7 lanes) using Thompson Sampling and ChromaDB semantic caching.
Execute the runner script from the skill directory:
cd ~/.gemini/antigravity/skills/urithiru
python3 runner.py \
--query "QUERY_HERE" \
--category code \
--auto \
--session-id "optional-label"
Only use explicit lane counts (e.g., --lanes 5 or --lanes 7) if the user explicitly overrides the auto-router (for example, by saying "run 5 lanes").
What ships with it
18 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- chroma_db/chroma.sqlite3 184 KB
- models.json 4.3 KB
- outlier_detector.py 6.8 KB runs code
- PROMPT_LIBRARY.md 21 KB
- prompts/adolin.md 2.1 KB
- prompts/lola.md 1.5 KB
- prompts/navani.md 1.9 KB
- prompts/pattern.md 2.0 KB
- prompts/shallan.md 2.2 KB
- prompts/stormfather.md 1.9 KB
- prompts/wit.md 1.8 KB
- README.md 6.0 KB
- router.py 8.8 KB runs code
- runner.py 23 KB runs code
- stats.py 17 KB runs code
- tracker.db 60 KB
- tracker.py 18 KB runs code
- update_models.py 3.9 KB runs code
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.
- 1mo ago First seen · 154 lines · 89 tokens per session scan A ebc481d31e31
urithiru is a skill published in the GitHub repository mphinance/alpha-skills (28 stars, last pushed 10d ago), licensed MIT. It adds 89 tokens to every session and 1,723 once invoked, about $0.0004 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 2026-09-14.
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