The final artifact: your personal prompt library. Collect the prompts you actually used, generalize them, and store them where your next feature starts.
- Generalize: replace project specifics with [placeholders].
- Name each prompt by the artifact it produces, not by cleverness.
- Store them in a doc/Notion: or a CLAUDE.md if you use Claude Projects.
Tip: Next feature, you start at Step 2. That compounding speed is the whole point.