place-fact

name	place-fact
description	Route a kept fact to its durable home by delivery trigger and most-local-wins — across in-file comment, nested CLAUDE.md, path-scoped rule, root CLAUDE.md, ARCHITECTURE.md, or a skill. TRIGGER when: user asks 'where should this go', 'which file/rule/home does this belong in', 'is this in the right place', 'should this be a pointer'; placing or re-homing a fact already judged worth keeping.

Place Fact

Primitive: PLACE — which durable home does this fact belong in?

Steps

1. Name the delivery trigger — the moment a future agent must already hold the fact. The trigger, not the topic, picks the home.

2. Map trigger → home:

   Trigger — when the agent must already hold the fact	Home
   Every session; must survive /compact	Root CLAUDE.md; unscoped .claude/rules/*.md
   Agent reads or edits a matching file	In-file comment; path-scoped .claude/rules/*.md; nested CLAUDE.md
   Task spans modules: design or cross-module debug	Root ARCHITECTURE.md
   External SDK / platform work	Skill, bundled with procedure

   A skill is a home only for external-platform knowledge fused with procedure (fetch-the-docs → validate steps). Repo-internal facts have no description to match and no procedure to bundle — never a skill.

   Not homes: module architecture.md and *-quirks.md — no auto-load trigger, no write-path, so they drift. Decompose instead: per-file fact → in-file comment; module invariant → path-scoped rule or nested CLAUDE.md; quirk catalog → a path-scoped rule on the affected globs (or the platform skill if SDK-specific).

3. Within "reads or edits a matching file," take the most-local home the feature's shape allows:

   • In-file comment — a constraint, assumption, or coupling visible from that one file. Prefer it; ships with the code, needs no glob.
   • Nested CLAUDE.md — a clean single-folder module where the folder is the feature boundary; covers new-file Write inside it.
   • Path-scoped rule — a feature interleaved across shared folders it doesn't own; a multi-glob rule is the only file-triggered surface that reaches across folders. Does not fire on new-file Write.

4. Confirm a write-path backs the home — route only to homes a workflow maintains, not orphan files.

5. Check loading mechanics against the trigger:

   • Root CLAUDE.md and unscoped rules load eagerly and re-inject after /compact.
   • Nested CLAUDE.md and path-scoped rules are lost on /compact, re-arm on the next matching read.
   • Nothing fires on new-file Write — a convention a not-yet-written file must satisfy needs the directory's CLAUDE.md.
   • ARCHITECTURE.md isn't auto-discovered; an @path import is eager (full-cost every session), not a lazy pointer.
   • Rules need YAML frontmatter with a paths: list of quoted globs ("**/*.md"); unquoted patterns starting with * or { break YAML.

6. Pointer rule — emit a pointer only to a target that won't auto-load on the trigger the reader is already on, and only when it carries a must-know-before-you-touch obligation:

   • Justified: root CLAUDE.md → an ARCHITECTURE.md section or a skill — neither auto-loads.
   • Narrow: CLAUDE.md → a rule, only when the rule's glob is deliberately narrower than the files the obligation touches (a cross-layer audit contract, or the new-file-Write gap):
     • Glob already covers the reader's files → it auto-loads → no pointer.
     • Rule should simply fire on those files → widen the glob, no pointer.
     • Widening would re-arm a heavy rule on edits it shouldn't gate → keep the pointer.
   • Never: CLAUDE.md → CLAUDE.md, or a folder→owner map — those auto-load on touch; the map only rots on rename.

7. One fact, one home; no home restates another. If two homes tempt you, the fact is two facts or you named the wrong trigger.