For manual prompting, I use a "macro"-like system where I can just add `[@mymacro]` in the prompt itself and Claude will know to `./lookup.sh mymacro` to load its definition. Can easily chain multiple together. `[@code-review:3][@pycode]` -> 3x parallel code review, initialize subagents with python-code-guide.md or something. ...Also wrote a parser so it gets reminded by additionalContext in hooks.

Interestingly, I've seen Claude do `./lookup.sh relevant-macro` without any prompting by me. Probably due it being mentioned in the compaction summary.