ImpTune/.planning/phases/01-foundation/01-02-SUMMARY.md

phase, plan, subsystem, tags, requires, provides, affects, tech-stack, key-files, key-decisions, patterns-established, requirements-completed, duration, completed

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	requirements-completed	duration	completed
01-foundation	02	database	peewee sqlite wal orm content-addressed-storage sha256	phase provides 01-01 FastAPI app shell with lifespan, config.py with DATA_DIR/DB_PATH/DRIVERS_DIR	Peewee SqliteDatabase instance with WAL mode + foreign_keys pragma (imptune/db/database.py) Full ORM schema: Client, Driver, Printer, Icon models for phases 1-5 (imptune/db/models.py) SHA256 content-addressed DriverStore with deduplication (imptune/storage/driver_store.py) Auto-initializing database via FastAPI lifespan startup	phase-02-clients phase-03-drivers phase-04-printers phase-05-export	added patterns peewee==3.17.9 Deferred SqliteDatabase init (db.init() at runtime so tests can override DB_PATH) safe=True on create_tables() for idempotent schema creation SHA256 content-addressed file storage for deduplication	created modified imptune/db/__init__.py imptune/db/database.py imptune/db/models.py imptune/storage/__init__.py imptune/storage/driver_store.py tests/test_db.py imptune/main.py	Deferred SqliteDatabase pattern (SqliteDatabase(None)) so tests can patch imptune.config.DB_PATH without module reload Full schema created upfront in phase 1 per locked user decision — later phases only add routes/logic, no schema changes init_db() placed in lifespan (not @app.on_event) consistent with 01-01 decision — plan text was outdated	TDD: RED (failing tests) then GREEN (implementation) for all db/storage modules ORM: All models extend BaseModel which references shared db instance via Meta.database = db Storage: DriverStore encapsulates all filesystem operations for driver packages	INFRA-01 INFRA-02	3min	2026-04-10

Phase 1 Plan 2: Database Schema and Driver Storage Summary

Peewee ORM with deferred SQLiteDatabase, full 4-table schema (Client/Driver/Printer/Icon) for all phases, and SHA256-deduplicating DriverStore — wired into FastAPI lifespan

Performance

• Duration: ~3 min
• Started: 2026-04-10T09:29:54Z
• Completed: 2026-04-10T09:32:07Z
• Tasks: 2 (Task 1 with TDD + Task 2)
• Files modified: 7

Accomplishments

• Full Peewee ORM schema with 4 tables covering all phases 1-5 (locked-in upfront design decision)
• WAL journal mode and foreign_keys pragma enforced via init_db() on every startup
• Deferred database pattern allows tests to safely redirect DB_PATH to tmp dirs without module reloads
• DriverStore provides SHA256 content-addressed storage with automatic deduplication on write
• init_db() integrated into FastAPI lifespan — database auto-creates at DATA_DIR/imptune.db on startup

Task Commits

Each task was committed atomically:

1. Task 1: Peewee models, database init, and driver storage - dea4148 (feat — TDD GREEN)
2. Task 2: Wire database init into FastAPI startup - 88d9c5f (feat)

Plan metadata: (docs commit follows)

Note: TDD — tests written first (RED), then implementation (GREEN). No separate refactor pass needed.

Files Created/Modified

• imptune/db/__init__.py - Package marker
• imptune/db/database.py - Deferred SqliteDatabase instance + init_db() with WAL/FK pragmas
• imptune/db/models.py - BaseModel, Client, Driver, Printer, Icon ORM models
• imptune/storage/__init__.py - Package marker
• imptune/storage/driver_store.py - SHA256 content-addressed DriverStore class
• tests/test_db.py - 7 TDD tests (table creation, WAL, FK, idempotency, save, dedup, get_path)
• imptune/main.py - Added import and call to init_db() in lifespan

Decisions Made

• Deferred database pattern: Used SqliteDatabase(None) + db.init() at runtime so pytest's monkeypatch on imptune.config.DB_PATH works without module reload side effects.
• Lifespan over @app.on_event: Plan text referenced @app.on_event("startup") but 01-01 established the lifespan pattern. Followed existing code — no deviation registered as this was alignment with an existing decision.
• Full schema upfront: All 4 tables created in phase 1 per user's locked decision, so phases 2-5 only add application logic.

Deviations from Plan

Auto-fixed Issues

1. [Rule 3 - Blocking] Installed missing peewee package

• Found during: Task 1 setup
• Issue: peewee was in requirements.txt but not installed in the active Python environment
• Fix: Ran python -m pip install peewee==3.17.*
• Files modified: None (environment only)
• Verification: import peewee succeeds, all 7 tests pass
• Committed in: Not committed (environment dependency install)

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Total deviations: 1 auto-fixed (1 blocking — missing dependency) Impact on plan: No scope creep. peewee install was a prerequisite, not new scope.

Issues Encountered

• Plan Task 2 referenced @app.on_event("startup") but the existing main.py from plan 01-01 already uses asynccontextmanager lifespan (per a decision recorded in STATE.md). Added init_db() to the lifespan function instead — no regression.

User Setup Required

None - no external service configuration required.

Next Phase Readiness

• Database layer complete — all ORM models importable and tested
• init_db() wired in — first app startup creates the database automatically in DATA_DIR
• DriverStore ready for driver upload routes (phase 3)
• All 24 tests pass (7 new + 17 existing), zero regressions

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Phase: 01-foundation Completed: 2026-04-10