trails/openspec/changes/wahoo-route-push/tasks.md

1. FIT Course encoder package

• 1.1 Scaffold packages/fit/ (package.json, tsconfig, vitest config) following the pattern of packages/gpx/
• 1.2 Add the package to pnpm-workspace.yaml and reference it from apps/journal/package.json
• 1.3 Add @garmin/fitsdk dependency to packages/fit/package.json and a small ambient src/fitsdk.d.ts declaring the Encoder, Stream, and Profile.MesgNum shapes we use (the SDK ships no types)
• 1.4 Wrap the SDK Encoder to emit the Course message stream Wahoo needs: file_id (type=course), file_creator, course (name, sport, capabilities), lap (start/end position, distance, elapsed time = 0), event (timer start at first record, timer stop at last), and record (position_lat, position_long, altitude, distance)
• 1.5 Implement gpxToFitCourse({ gpx, name, description?, sport? }): parse GPX via @trails-cool/gpx, compute distance and ascent, drive the SDK encoder, return Uint8Array
• 1.6 Add fixtures in packages/fit/__fixtures__/ covering: short flat route, alpine route with elevation, multi-day route, route with single track point (should still encode), zero-track-point route (should throw)
• 1.7 Write round-trip tests: encode each fixture, decode with fit-file-parser, assert track-point count and lat/lon/elevation parity within tolerance (1e-5 deg, 0.5 m)
• 1.8 Add the package to pnpm test and pnpm typecheck runs (should be automatic via Turborepo)

2. Database schema for push tracking

• 2.1 Add sync_pushes table to packages/db/src/schema/journal.ts with columns from design.md §3 and a unique index on (user_id, route_id, route_version, provider)
• 2.2 Add a granted_scopes text[] column to sync_connections in the same schema file, defaulting to an empty array, and backfill existing rows with the legacy scopes (workouts_read, user_read, offline_data)
• 2.3 Generate the Drizzle migration via pnpm --filter @trails-cool/db db:generate (migration files land in packages/db/migrations/)
• 2.4 Apply locally via pnpm db:push and verify with pnpm db:studio

3. Wahoo provider scope upgrade

• 3.1 Add routes_write to the Wahoo scopes array in apps/journal/app/lib/sync/providers/wahoo.ts:14
• 3.2 Persist granted_scopes on the sync_connections row at exchangeCode time. Wahoo's token endpoint does not return a scope field and grants scopes all-or-nothing, so record the requested scope set as granted. The scope-mismatch detection in §5.2 is therefore a comparison against our own constant, not against provider-reported state — that's intentional and only needs to flag pre-routes_write connections.
• 3.3 Implement pushRoute(connection, { gpx, name, description, externalId }) on the Wahoo provider: base64-encode the FIT, build the form-encoded body, POST /v1/routes, return { remoteId } on success or throw a typed error on failure (token expired, scope missing, validation error, rate limit, generic)
• 3.4 Wire token-refresh-on-401 through the new push call (reuse the existing withFreshToken helper or equivalent)

4. Sync provider interface extension

• 4.1 Add an optional pushRoute?: (connection, payload) => Promise<{ remoteId: string }> method to the SyncProvider interface in apps/journal/app/lib/sync/types.ts
• 4.2 Define the PushRoutePayload and PushRouteResult types alongside it
• 4.3 Add a providerSupportsPush(provider) helper for use in loaders/UI

5. Push action route and idempotency layer

• 5.1 Add an action route at /api/sync/push/wahoo/:routeId that resolves the route, verifies the requesting user is the owner, looks up the user's Wahoo connection, and runs the push
• 5.2 Before calling Wahoo, check sync_connections.granted_scopes for routes_write; if missing, redirect to getAuthUrl with state { return_to, push_after }
• 5.3 Look up an existing sync_pushes row for (user_id, route_id, route_version, 'wahoo') — if pushed_at is set, return the existing remote_id without calling Wahoo
• 5.4 On a fresh push, build the payload (external_id = "route:<routeId>:v<version>", current timestamp, route name/description, start lat/lng, computed distance and ascent), call provider.pushRoute, and write the result to sync_pushes (insert on success, update existing row on retry of a failed attempt)
• 5.5 Map error types to user-facing copy: scope missing → re-auth redirect; token expired after refresh → reconnect prompt; 422 validation → "We couldn't send this route — try editing the name or description"; 5xx / network → generic retry

6. OAuth callback resumes pending push

• 6.1 Extend the OAuth callback handler at /api/sync/callback/wahoo to parse state.push_after and state.return_to
• 6.2 If push_after, after persisting the new tokens and scopes, run the push pipeline server-side and redirect to return_to with a success or failure flash message
• 6.3 If the user denied the new scope (callback arrives with ?error=access_denied), redirect to return_to with the "needs route permission" notice

7. Route detail page UI

• 7.1 In the route detail loader, include the latest sync_pushes row for the current version and the user's Wahoo connection presence + scopes
• 7.2 Render the "Send to Wahoo" button next to the existing Export GPX action when conditions in spec §1 are met
• 7.3 Render the post-push status: "Sent to Wahoo on " replacing the button when a successful push exists
• 7.4 Render the failed-push state: "Last attempt failed: " with the button still active
• 7.5 Add the button copy "This sends your route to Wahoo" as a tooltip or helper text near the button (privacy disclosure at the action point)
• 7.6 Add i18n strings for all new UI copy (English + German) per the i18n convention in CLAUDE.md

8. Privacy manifest

• 8.1 Update docs/privacy.md (or whichever file holds the privacy manifest) to declare that route geometry, name, and description are sent to Wahoo when the user clicks "Send to Wahoo"
• 8.2 Cross-link the privacy entry from the proposal and from this change's README in openspec/changes/wahoo-route-push/

9. Tests

• 9.1 Unit tests for gpxToFitCourse — already covered in §1.7
• 9.2 Unit tests for the action route's idempotency logic (mock Wahoo HTTP layer): fresh push, re-push of pushed version, retry of failed push, push of new version after edit
• 9.3 Unit tests for the scope-mismatch redirect flow
• 9.4 E2E test in e2e/: log in as a user with a (mocked) Wahoo connection, open a route detail page, click "Send to Wahoo", assert the success toast and the "Sent to Wahoo on …" status appear
• 9.5 E2E test for the re-auth flow: user without routes_write clicks Send to Wahoo, redirects to OAuth (mocked), returns, push completes, status renders

10. Manual verification before merge

• 10.1 Smoke test against Wahoo's real API in a dev sandbox: push a real route, confirm it appears in the Wahoo App and on a physical ELEMNT/BOLT/ROAM
• 10.2 Verify provider_updated_at and external_id semantics: push v1, edit and push v2, confirm both appear as separate routes on Wahoo
• 10.3 Verify error path: revoke routes_write from the dev account in Wahoo's UI, click Send to Wahoo, confirm the re-auth flow runs and completes the push
• 10.4 Verify the privacy manifest entry is reachable from the in-app privacy disclosure

11. Release

• 11.1 Run pnpm typecheck && pnpm lint && pnpm test && pnpm test:e2e
• 11.2 Open PR with the change summary linking to openspec/changes/wahoo-route-push/proposal.md
• 11.3 After merge, monitor sync_pushes.error for the first week; if a recurring failure mode shows up, file a follow-up
• 11.4 Run /opsx:archive wahoo-route-push once the change is live and confirmed