Pattern packs

Where packs load from, in order

1. hooks/lib/patterns/ (the built-in packs).
2. $XDG_CONFIG_HOME/concise/patterns/, else ~/.config/concise/patterns/ (the user packs, loaded for every project).
3. <cwd>/.claude/concise/patterns/.
4. <cwd>/.codex/concise/patterns/.
5. Each entry in features.aiWriting.packs, in list order. BEC_LOAD_LIB_PATHS is appended to that list.

Each source is walked recursively, sorted by name, and only .json and .mjs files are read. presets.json is skipped. A later source with the same pack id replaces the earlier pack. Two files with the same id inside one source is an error, and so is a pack whose id does not match its file name. An invalid pack is skipped and reported once per session.

An entry in features.aiWriting.packs is a file or a directory, absolute or relative to the project directory.