Until now life events were stored but ignored by the engine — pure
metadata. Now they actually move portfolios.
Engine:
- simulator.simulate() takes optional cashflow_adjustments: a (n_years,)
real-GBP array applied each year *after* savings + return but
*before* withdrawal. Positive = inflow, negative = outflow.
- New fire_planner/life_events.py with EventInput dataclass +
events_to_cashflow_array(events, horizon). Handles ranged deltas,
one-time amounts, disabled events, year clipping past horizon,
negative year_start (clipped to 0), and summing multiple events.
API:
- /simulate accepts optional life_events list. Server converts each
to EventInput, builds cashflow_adjustments, passes to simulate().
- Frontend Run-now on scenario detail now fetches the scenario's
life events and includes them in the request — projections finally
reflect "retire at 50, kid born at y3, inheritance at y22".
Tests: 11 events helper + 4 end-to-end engine + 1 API integration =
16 new tests. 188 total (was 172). mypy strict + ruff clean.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Adds the read+write endpoints the frontend needs to drive a
ProjectionLab-style UX on top of the existing engine.
- /networth, /networth/history — NW total + per-account from
account_snapshot (frontend chart)
- /scenarios CRUD + projection — list/get/create/patch/delete user
scenarios; cartesian read-only
- /scenarios/{id}/life-events — life event CRUD nested under scenario
- /life-events/{id} — patch + delete by id
- /scenarios/{id}/goals,
/goals/{id} — retirement goal CRUD
- /simulate, /compare — sync, no-DB-write what-if endpoints
Auth: Bearer-token dependency on writes + simulate when API_BEARER_TOKEN
is set; reads always open (lock down via Authentik-fronted ingress in
prod). Existing /recompute keeps its bearer auth.
CORS middleware reads FRONTEND_ORIGINS (comma-separated) for the dev
SPA. Lifespan now provisions the SQLAlchemy engine + session_factory
on app.state and disposes them on shutdown.
40 new tests covering happy paths and validation. 172 tests total.
mypy strict + ruff clean (B008 ignore added — Depends() in defaults
is the canonical FastAPI pattern, not a bug).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
