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plan-a-change

100 / 100 · Low risk

Fine to try.

By testdouble/han (GitHub) · coding · 341 stars · scanned at commit abba73a

Plans an architecture-driven change to code that already exists: module boundaries, type responsibilities, layering, coupling, and the public surface a revision moves. Produces a buildable change plan that names the types, modules, and methods involved and records the surface delta each change makes. Use when the user wants to plan, scope, or sequence a restructure, extraction, split, consolidation, responsibility shift, or API revision of existing code, including "these responsibilities are wr…

Works with any agent that supports SKILL.md skills.

What this skill can do

We found nothing in the files we read that matches our rules. That does not prove the skill is safe: see the limits of static scanning.

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'plan-a-change' ] || [ -L ~/.agents/skills/'plan-a-change' ]; then echo 'A skill folder named plan-a-change already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/testdouble/han' "$d" && git -C "$d" checkout --quiet 'abba73a773528905a8f3d15956029394746e5c7f' -- 'han-planning/skills/plan-a-change' && mkdir -p ~/.agents/skills && cp -R "$d"/'han-planning/skills/plan-a-change' ~/.agents/skills/'plan-a-change' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'plan-a-change' ~/.claude/skills/'plan-a-change' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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