Build phases

ReckonFlow was built in six phases. Each page has a worked example and the failure mode that matters for that phase.

Phase	Focus
0	Package layout, /health, CI, config, logging
1	Decimal money, double-entry tables, Alembic
2	Travel, approvals, expenses, bank CSV
3	Redis Idempotency-Key + cached responses
4	202 upload, Groq/stub extraction, evals
5	Prefilter, RapidFuzz, RRF, FOR UPDATE
6	OpenAPI, seed, Neon/Render/Upstash, auth

Keep the glossary open while you read.