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 AR6420/Hail_Hydra --skill stfu-agentsgit clone --depth 1 https://github.com/AR6420/Hail_HydraWrote 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/ar6420/hail_hydra/stfu-agents)<a href="https://agentmods.dev/skills/ar6420/hail_hydra/stfu-agents"><img src="https://agentmods.dev/badge/skills/ar6420/hail_hydra/stfu-agents/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/ar6420/hail_hydra/stfu-agents"><img src="https://agentmods.dev/badge/skills/ar6420/hail_hydra/stfu-agents.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 | $0.00063 | $0.00605 |
| Opus 5 | $0.00032 | $0.00302 |
| Sonnet 5 | $0.00013 | $0.00121 |
| Haiku 4.5 | $0.00006 | $0.00060 |
Grade A, and why
STFU Agents 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 10d 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 — 60 lines — stays where its author put it; the contents beside it link to each section on GitHub.
STFU-Agents Mode
When this skill is active, the orchestrator (Opus) prepends an internal-thinking compression directive to EVERY Task tool dispatch — regardless of which agent.
Behavior — Orchestrator (Opus)
When dispatching any subagent via the Task tool, prepend this directive to the prompt argument:
[INTERNAL-COMPRESSION DIRECTIVE — STFU-Agents mode active]
Your internal reasoning is billed but never read — only your final summary returns to the orchestrator. Therefore:
1. Skip preambles ("Let me…", "I'll examine…", "First I need to…")
2. Skip step announcements ("Step 1:", "Now let me…")
3. Skip transition prose between tool calls
4. Skip restatements of tool outputs (they're already in your context)
5. Act first, summarize at the end
Maintain whatever output format your role requires. Just keep the path from task → output terse internally.
Activation
/hydra:stfu/skills stfu-agentsor/skills STFU Agents- Natural language: "STFU agents", "shut up agents", "quiet agents", "compress all agents"
Scope
- Hydra's own subagents (already have Tier 3 — harmless reinforcement)
- Third-party subagents installed by the user
- Claude Code's built-in subagents (Explore, etc.)
- User-defined custom subagents
Does NOT apply to:
- The main orchestrator (Opus) — orchestrator follows SKILL.md's own response rules
- Direct user-facing responses
Deactivation
/skills(clear active skills)- Natural language: "verbose agents", "stop STFU"
When NOT to use
- Debugging a subagent's behavior (you want to see its reasoning)
- Teaching the user how subagents work
- User explicitly asked for verbose mode
Compatibility
Purely additive at runtime. No agent files modified. If a subagent ignores the directive, no harm done — falls back to baseline. Coexists with any other skill or framework.
Risk Disclosure
STFU-Agents adds a directive to subagents Hydra does not own. While the directive is additive and harmless in principle, it has not been tested against every possible subagent definition. Activate explicitly; deactivate if anything looks off.
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.
- 10d ago First seen · 60 lines · 63 tokens per session scan A 0c462b702504
STFU Agents is a skill published in the GitHub repository AR6420/Hail_Hydra (47 stars, last pushed 1mo ago), licensed MIT. It adds 63 tokens to every session and 605 once invoked, about $0.0003 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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