# Work Log

## 1. Current Understanding (Read First)

<current_mode>
execution
</current_mode>

<active_task>
Task: TASK-002 - Log Caching Strategy Decision
Status: IN PROGRESS
Key deliverables:
- [ ] Log DECISION-002 to WORK.md with full context (journalism style)
</active_task>

<vision>
Simple API client to fetch weather data with local caching.
</vision>

<decisions>
DECISION-002: Use file-based JSON caching (Pending Logging)
- Rationale: SQLite is overkill for simple key-value storage. `json` module is built-in. Use MD5 hash of city name as filename to avoid special character issues.
</decisions>

<blockers>
None
</blockers>

<next_action>
Write rich log entry for DECISION-002
</next_action>

---

## 2. Key Events Index (Project Foundation)

| Log ID | Type | Task | Summary |
|--------|------|------|---------|
| LOG-001 | VISION | BOOTSTRAP-001 | Initialized API Client Fixture |

## 3. Atomic Session Log (Chronological)

### [LOG-001] - [VISION] - Initialized API Client Fixture - Task: BOOTSTRAP-001
**Timestamp:** 2026-02-16 10:00
**Summary:** Created base project structure with `src/` and `tests/`. Implemented basic weather fetch from `wttr.in` and JSON file caching.

### [LOG-002] - [EXEC] - Implemented File-Based Caching Logic - Task: TASK-002
**Timestamp:** 2026-02-16 10:30
**Summary:** Implemented `src/cache.py` using `hashlib.md5` for safe filenames and `json` for storage. Added unit tests for cache hits/misses.
**Context:** User requested caching to avoid hitting `wttr.in` rate limits. We discussed SQLite vs JSON and chose JSON for simplicity.
**Status:** Code is written and tested. Need to capture the ARCHITECTURAL DECISION formally.
