Episode 11: Skill 6 — Timeline Report
This episode's scenario: The blog project has been in development for 3 months. Your boss/partner asks: "What did you actually accomplish these past 3 months?" You need a clear technical retrospective.
11.1 What Does Timeline Report Solve?
Imagine answering these questions:
- "How many features were built?"
- "Which bugs keep recurring?"
- "What major architecture decisions were made?"
- "Which module took the longest to develop?"
Remembering from memory? Impossible. Scrolling through chat logs? Painful.
Timeline Report extracts data from Observations and auto-generates a structured project retrospective.
11.2 What's in the Report?
📅 Timeline Overview
2026-04 Blog Project Development
────────────────────────────────
04-01 ■■■ Project init + DB design (3 sessions)
04-05 ■■ Article CRUD API (2 sessions)
04-08 ■ Tagging system (1 session)
04-10 ■■■■ Comments + bug fixes (4 sessions)
04-15 ■■ Auth system (2 sessions)
04-18 ■ Comment notifications (1 session)
04-20 ■■ Frontend + deploy (2 sessions)
🏗️ Architecture Decision Log
| # | Decision | Date | Rationale |
|---|---|---|---|
| 1 | Prisma as ORM | 04-01 | Type safety + migration management |
| 2 | Implicit many-to-many for tags | 04-08 | No extra fields needed |
| 3 | JWT + refresh token auth | 04-15 | Stateless + secure |
| 4 | Vercel deployment | 04-20 | Zero-config + auto CI/CD |
🐛 Bug Fix Record
| # | Bug | Occurrences | Final Fix |
|---|---|---|---|
| 1 | Prisma FK constraint error | 3 times | Added cascade delete |
| 2 | JWT token not refreshing | 2 times | Fixed refresh endpoint |
| 3 | Comment API 422 error | 1 time | Added zod input validation |
11.3 Practical Uses
| Use Case | Description |
|---|---|
| Tech retrospective | Review project evolution, find improvements |
| Team handoff | New devs quickly understand project history |
| Bug pattern detection | Spot recurring issues, fix root causes |
| Efficiency analysis | Token trends reflect productivity changes |
| Weekly/monthly reports | Auto-generated, no recall needed |
Hands-On Exercise
- After 5+ sessions on the blog project
- Ask Claude to generate a Timeline Report
- Check the architecture decision list — is it complete?
- Review bug fix records — any recurring patterns?
Coming Up Next
One Skill left: Plugin Release. It manages Claude-Mem's own version updates, including stable/beta channel switching.