Writing rules

One list, one copy, synced from the hub — rules update here, never in a consumer. Enforcement varies per repo; the rules do not.

The rules live in sidecar files, one per style, so only what applies gets injected:

• rules/all.md — every file: audience, words and links, the never list, where a statement lives
• rules/plain.md — a person reads it: README, docs, code comments
• rules/dense.md — only an agent reads it: CLAUDE.md, AGENTS.md, skill files, agent docs; where both could apply, dense wins
• rules/git.md — commits, PRs, issues; the format is enforced by setup-repo's commit gate

Reviewing or writing prose by hand? Read the sidecars above — this file holds no rule.

Injection on write actions

scripts/inject-writing-rules.mjs is a PreToolUse hook: on every file-writing tool call it prints the matching rules (all + plain|dense by path) as additional context, so the writer sees them without loading this skill. /setup-repo wires it into .claude/settings.json. Markdown files only; node_modules, .temp/ and the synced .claude/skills/.claude/rules trees are skipped.