bighead

bighead is a skill for Claude Code from fortunto2/rust-code. It costs 74 tokens per session (468 once invoked), scanned A, original, MIT.

An autonomous task workflow that repeatedly assesses, plans, changes, tests, and commits software work until the task is finished. It also tracks progress in task files.

In plain words
What is it for?
Running longer coding tasks, testing each change, committing progress, and stopping when the work is complete or a control file requests a stop.
Why use it?
It lets a coding task continue through multiple implementation and verification steps with saved progress between iterations.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit Running longer coding tasks, testing each change, committing progress, and stopping when the work is complete or a control file requests a stop.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/fortunto2/rust-code/bighead
Install

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.

Any agent
npx skills add fortunto2/rust-code --skill bighead
Clone the repo
git clone --depth 1 https://github.com/fortunto2/rust-code

Made for: Claude Code.

Wrote 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.

agentmods badge for bighead

README.md
[![agentmods](https://agentmods.dev/badge/skills/fortunto2/rust-code/bighead/github.svg)](https://agentmods.dev/skills/fortunto2/rust-code/bighead)
Your own site
<a href="https://agentmods.dev/skills/fortunto2/rust-code/bighead"><img src="https://agentmods.dev/badge/skills/fortunto2/rust-code/bighead/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.

agentmods 80×15 button for bighead

Your own site · 80×15
<a href="https://agentmods.dev/skills/fortunto2/rust-code/bighead"><img src="https://agentmods.dev/badge/skills/fortunto2/rust-code/bighead.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 74 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 468 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, 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 Rogue Agent · line 3
    Skill modifies its own code, configuration, or behavior at runtime. Self-modification enables an agent to escalate privileges, disable safety constraints, or install persistent backdoors.
    Fix: Prevent the skill from modifying its own code, SKILL.md, or configuration files. Treat skill files as read-only at runtime.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00074 $0.00468
Opus 5.5 $0.00030 $0.00187
Sonnet 5.5 $0.00015 $0.00094
Haiku 4.5 $0.00007 $0.00047

Measured 1mo ago against content hash 18a2183c6917, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

bighead 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.

skills/bighead/SKILL.md · 35 lines

What it actually says

BigHead — Autonomous Task Loop

Named after Nelson Bighetti from Silicon Valley. You run autonomously until the task is done. The human may be asleep.

Core Loop

Each iteration: assess → plan → execute → test → commit → continue or stop.

Use .tasks/ for tracking progress across iterations. Read Makefile for available commands.

Signals

  • Task complete → include <solo:done/> in finish summary
  • Needs retry → include <solo:redo/>
  • Control file: echo stop > .rust-code/loop-control

Gotchas

  1. Commit before you forget — if you accumulate a large diff and the next step fails, you lose everything. Commit after every meaningful change, even if incomplete.
  2. Pre-commit hooks will bite you — make check runs tests + clippy + fmt. If you skip it and commit directly, the hook will reject. Always make fmt before committing.
  3. Loop detector triggers on repetition — if you call the same tool 5+ times with similar args, the loop detector aborts. Vary your approach — don't retry the same failing command.
  4. Don't ask the human — you are autonomous. If stuck, try a different approach, read more code, check git log. Never call ask_user.
  5. Test command varies by project — don't assume cargo test. Read Makefile or package.json first. make help shows all targets.

When to Stop

Include <solo:done/> when: all tasks done + tests pass + code committed + result verified.

Changes

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.

  1. 1mo ago First seen · 35 lines · 74 tokens per session scan A 18a2183c6917

Subscribe to this mod's changes

bighead is a skill published in the GitHub repository fortunto2/rust-code (45 stars, last pushed 1mo ago), licensed MIT. It adds 74 tokens to every session and 468 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.

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