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guidance

guidance is a skill for Claude Code, Codex from testdouble/han. It costs 160 tokens per session (1,701 once invoked), scanned A, original, MIT.

Authoritative guidance for building Claude Code skills, agents, and plugins, plus init and update steps that install and refresh the plugin-building skills in the current repository. Use when you need the rules or best practices for a skill, agent, hook, or plugin — designing, reviewing, hardening, or checking one…

Skill for Claude CodeCodex

Installs and runs on its own, but its text points at files inside the plugin that ships it — anything it tells you to read at a ${CLAUDE_PLUGIN_ROOT} path is only there once the plugin is installed.

not rated 255 3d ago A scan 160 tokens MIT
View the source file testdouble/han
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.

agentmods
npx agentmods add skills/testdouble/han/guidance
Any agent
npx skills add testdouble/han --skill guidance
Clone the repo
git clone --depth 1 https://github.com/testdouble/han

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 guidance

README.md
[![agentmods](https://agentmods.dev/badge/skills/testdouble/han/guidance.svg)](https://agentmods.dev/skills/testdouble/han/guidance)
Your own site
<a href="https://agentmods.dev/skills/testdouble/han/guidance"><img src="https://agentmods.dev/badge/skills/testdouble/han/guidance.svg" alt="Measured on agentmods" height="20"></a>
Per session 160 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,701 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00160 $0.01701
Opus 5 $0.00080 $0.00851
Sonnet 5 $0.00032 $0.00340
Haiku 4.5 $0.00016 $0.00170

Measured today against content hash 5630bafba414, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

guidance 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 today.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/init-guidance.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

han-plugin-builder/skills/guidance/SKILL.md · 103 lines

How it starts

The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Project Context

  • personal config directory: !bash "${CLAUDE_PLUGIN_ROOT}/scripts/han-config-dir.sh" 2>/dev/null || echo "$HOME/.claude"
  • project .han/config.md: !cat .han/config.md 2>/dev/null || echo ""

As your first action, use the Read tool on .han/config.md inside the personal config directory path above. A read that returns no file is no personal configuration: continue silently. When that file or the project .han/config.md probe supplies content, apply it per config-rule.md, which governs precedence between the two files, relative-path resolution, and what to do with a file that reads but cannot be used.

This skill has three modes. Pick the mode from how it was invoked, then follow only that mode's steps.

  • If the invocation argument is init or initialize (any case), run Initialization Mode.
  • If the invocation argument is update or refresh (any case), run Update Mode.
  • Otherwise, run Guidance Mode.

Guidance Mode

Serve the relevant guidance for what the user is building. Do not read every guidance document — that defeats the purpose. Find the one or two that apply, read them, and apply them.

The guidance documents live in this skill's own references/ directory. Use this map to choose, then read only the specific file(s) you need:

  • Deciding whether something should be a skill, agent, or hook → ${CLAUDE_SKILL_DIR}/references/plugin-entity-taxonomy.md.
  • Authoring or hardening a skill (descriptions, frontmatter, progressive disclosure, allowed-tools, scripts, composition, testing, troubleshooting) → the files under ${CLAUDE_SKILL_DIR}/references/skill-building-guidance/.
  • Authoring an agent (domain focus, self-containment, model selection, multi-agent economics, graceful degradation) → the files under ${CLAUDE_SKILL_DIR}/references/agent-building-guidelines/.
  • Plugin or marketplace configuration files (plugin.json, marketplace.json, monitors.json, themes.json) → the files under ${CLAUDE_SKILL_DIR}/references/claude-marketplace-and-plugin-configuration/.
  • Versioning, README structure, local development, the iterative development process, and specialization-versus-model-tier reasoning → the top-level files in ${CLAUDE_SKILL_DIR}/references/.
  • Writing the instructions for a target model (how Sonnet 5, Opus 5, and Fable 5 differ in following instructions, which instructions to leave out, and how to calibrate length, narration, and scope) → ${CLAUDE_SKILL_DIR}/references/per-model-authoring.md.
  • Copyable starter files → ${CLAUDE_SKILL_DIR}/references/templates/.

Read the full file on GitHub · 103 lines

Files

What ships with it

49 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.

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. today First seen · 103 lines · 160 tokens per session scan A 5630bafba414

Subscribe to this mod's changes

guidance is a skill published in the GitHub repository testdouble/han (255 stars, last pushed 3d ago), licensed MIT. It adds 160 tokens to every session and 1,701 once invoked, about $0.0008 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 2026-09-03.

Code reviewclaudeclaude-codeclaude-code-pluginclaude-skillsdocumentation
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