homunculus

homunculus is a skill for Claude Code, Codex from JavanC/Homunculus. It costs 13 tokens per session (291 once invoked), scanned A, original, MIT.

A command-and-workflow guide for evolving an AI assistant called Homunculus. It routes requests about goals, system status, evolution, evaluation, and improvement to the relevant procedures and files.

In plain words
What is it for?
Use it to run evolution cycles, define goals, check status, aggregate learned patterns, evaluate skills, or improve a skill.
Why use it?
It gives recurring assistant-maintenance tasks a defined route instead of relying on ad hoc commands. This makes it clearer which workflow to follow for each kind of system change.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to run evolution cycles, define goals, check status, aggregate learned patterns, evaluate skills, or improve a skill.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/javanc/homunculus/homunculus
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 JavanC/Homunculus --skill homunculus
Clone the repo
git clone --depth 1 https://github.com/JavanC/Homunculus

Made for: Claude Code, Codex.

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 homunculus

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/javanc/homunculus/homunculus"><img src="https://agentmods.dev/badge/skills/javanc/homunculus/homunculus.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 13 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 291 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.
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 $0.00013 $0.00291
Opus 5.5 $0.00005 $0.00116
Sonnet 5.5 $0.00003 $0.00058
Haiku 4.5 $0.00001 $0.00029

Measured 11d ago against content hash fb384df73103, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

homunculus 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 11d 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/codex/homunculus-skill.md · 25 lines

What it actually says

Homunculus Evolution Commands

When the user asks about evolution, goals, or system status, use this routing table:

User says Read and follow
"run evolution" / "nightly cycle" / "hm-night" / "evolve the system" homunculus/commands/hm-night.md
"define goals" / "goal tree" / "hm-goal" / "set up architecture" homunculus/commands/hm-goal.md
"system status" / "hm-status" / "show evolution status" homunculus/commands/hm-status.md
"evolve skill" / "aggregate instincts" homunculus/commands/evolve.md
"eval skill" / "test skill" homunculus/commands/eval-skill.md
"improve skill" / "fix skill" homunculus/commands/improve-skill.md

Key Paths

  • architecture.yaml — goal tree
  • evolution-config.yaml — tier/schedule/budget
  • homunculus/instincts/personal/ — behavioral patterns
  • homunculus/evolved/skills/ — tested knowledge
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. 11d ago First seen · 25 lines · 13 tokens per session scan A fb384df73103

Subscribe to this mod's changes

homunculus is a skill published in the GitHub repository JavanC/Homunculus (15 stars, last pushed yesterday), licensed MIT. It adds 13 tokens to every session and 291 once invoked, about $0.0001 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 2026-10-20.

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