docs(13-01): complete registry refactor and 18-backend expansion plan

- 13-01-SUMMARY.md: full execution summary with decisions, deviations, and task commits
- STATE.md: updated position to phase 13 plan 01 complete, added key decisions
- ROADMAP.md: 13-01 checked off, phase 13 progress 1/4
- REQUIREMENTS.md: REMOTE-01, REMOTE-02, REMOTE-06 marked complete (3/6 v1.3 requirements)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.planning/REQUIREMENTS.md

@@ -45,12 +45,12 @@
 
 ### Remote Backend Expansion
 
-- [ ] **REMOTE-01**: BACKEND_REGISTRY contains all 17 backends (7 existing + 10 new) with correct rclone field definitions, displayName, description, and category
+- [x] **REMOTE-01**: BACKEND_REGISTRY contains all 18 backends (7 existing + 11 new) with correct rclone field definitions, displayName, description, and category
-- [ ] **REMOTE-02**: BackendType is derived from registry keys (`keyof typeof BACKEND_REGISTRY`) instead of an explicit union literal, eliminating a touch-point when adding backends
+- [x] **REMOTE-02**: BackendType is derived from registry keys (`keyof typeof BACKEND_REGISTRY`) instead of an explicit union literal, eliminating a touch-point when adding backends
 - [ ] **REMOTE-03**: BackendSelectionStep displays backends grouped by category (Cloud Object Storage, Cloud Drives, Protocol-based) with instant search filtering and inline SVG icons
 - [ ] **REMOTE-04**: OAuth-token backends (Google Drive, Dropbox, Box, pCloud, OneDrive) display a collapsible OAuthInstructions component with backend-specific `rclone authorize` command
 - [ ] **REMOTE-05**: RemoteConfigStep renders the correct form fields for every backend, including GdriveAuthToggle for Google Drive's dual-auth (OAuth token vs service account)
-- [ ] **REMOTE-06**: buildRcloneConf produces valid rclone.conf output with correct type strings for all 17 backends
+- [x] **REMOTE-06**: buildRcloneConf produces valid rclone.conf output with correct type strings for all 18 backends
 
 ## Future Requirements
 
@@ -91,16 +91,16 @@
 | DARK-01 | Phase 12 | Complete |
 | DARK-02 | Phase 12 | Complete |
 | DARK-03 | Phase 12 | Complete |
-| REMOTE-01 | Phase 13 | Planned |
+| REMOTE-01 | Phase 13 | Complete |
-| REMOTE-02 | Phase 13 | Planned |
+| REMOTE-02 | Phase 13 | Complete |
 | REMOTE-03 | Phase 13 | Planned |
 | REMOTE-04 | Phase 13 | Planned |
 | REMOTE-05 | Phase 13 | Planned |
-| REMOTE-06 | Phase 13 | Planned |
+| REMOTE-06 | Phase 13 | Complete |
 
 **Coverage:**
 - v1.2 requirements: 18 total (18 complete)
-- v1.3 requirements: 6 total (0 complete)
+- v1.3 requirements: 6 total (3 complete)
 - Mapped to phases: 24
 - Unmapped: 0
 

.planning/ROADMAP.md

@@ -140,7 +140,7 @@ Plans:
 **Plans:** 4 plans
 
 Plans:
-- [ ] 13-01-PLAN.md — Registry refactoring: derive BackendType, add categories, 10 new backend entries, auto-generate schemas
+- [x] 13-01-PLAN.md — Registry refactoring: derive BackendType, add categories, 11 new backend entries (18 total), auto-generate schemas
 - [ ] 13-02-PLAN.md — New components: OAuthInstructions, GdriveAuthToggle, BackendIcons
 - [ ] 13-03-PLAN.md — BackendSelectionStep UX overhaul: categories, search, icons
 - [ ] 13-04-PLAN.md — RemoteConfigStep wiring for all new backends + visual verification
@@ -161,4 +161,4 @@ Plans:
 | 10. Content & Clarity | v1.2 | 3/3 | Complete | 2026-04-01 |
 | 11. Polish & Responsiveness | v1.2 | 2/2 | Complete | 2026-04-01 |
 | 12. Dark mode visibility fixes | v1.2 | 2/2 | Complete | 2026-04-01 |
-| 13. Add remaining RClone remotes | v1.3 | 0/4 | In Progress | — |
+| 13. Add remaining RClone remotes | v1.3 | 1/4 | In Progress | — |

.planning/STATE.md

@@ -1,17 +1,17 @@
 ---
 gsd_state_version: 1.0
-milestone: v1.2
+milestone: v1.3
-milestone_name: UI Polish & Clarity
+milestone_name: Backend Expansion
-status: completed
+status: in-progress
-stopped_at: Phase 13 context gathered
+stopped_at: "Phase 13 plan 01 complete"
-last_updated: "2026-04-01T12:27:37.497Z"
+last_updated: "2026-04-01T16:20:00Z"
-last_activity: 2026-04-01 — Phase 11 plan 02 complete (POLISH-03, POLISH-04 satisfied)
+last_activity: 2026-04-01 — Phase 13 plan 01 complete (REMOTE-01, REMOTE-02, REMOTE-06 satisfied)
 progress:
-  total_phases: 6
+  total_phases: 7
-  completed_phases: 5
+  completed_phases: 6
-  total_plans: 14
+  total_plans: 18
-  completed_plans: 14
+  completed_plans: 15
-  percent: 100
+  percent: 83
 ---
 
 # Project State
@@ -25,12 +25,12 @@ See: .planning/PROJECT.md (updated 2026-03-31)
 
 ## Current Position
 
-Phase: 11 of 11 (Polish & Responsiveness) — Complete
+Phase: 13 of 13 (Add Remaining RClone Remotes) — In Progress
-Plan: 11-02 (complete)
+Plan: 13-01 (complete)
-Status: Phase 11 complete — all plans done (POLISH-01, POLISH-02, POLISH-03, POLISH-04 satisfied)
+Status: Phase 13 plan 01 complete — registry refactor and 18-backend expansion done
-Last activity: 2026-04-01 — Phase 11 plan 02 complete (POLISH-03, POLISH-04 satisfied)
+Last activity: 2026-04-01 — Phase 13 plan 01 complete (REMOTE-01, REMOTE-02, REMOTE-06 satisfied)
 
-Progress: [██████████] 100% (v1.2)
+Progress: [████████░░] 83% (v1.3)
 
 ## Accumulated Context
 
@@ -72,6 +72,10 @@ Recent decisions affecting current work:
 - [Phase 12-dark-mode-visibility-fixes]: bg-surface-container text-on-surface added to FieldRenderer select className — semantic tokens ensure correct rendering in both light and dark themes without dark: prefix
 - [Phase 12-dark-mode-visibility-fixes]: accent-[var(--r2b-warning)] arbitrary value used for ReviewStep security checkbox — accent-warning class not confirmed generated by Tailwind v4
 - [Phase 12-dark-mode-visibility-fixes]: Removed {' '} space-before-text pattern in DeploymentStep labels — replaced with flex gap-2 layout for consistent spacing
+- [Phase 13-01]: BackendType derived from keyof typeof BACKEND_REGISTRY — eliminates manual union maintenance at 18+ backends
+- [Phase 13-01]: Registry uses as const (not Record<BackendType,...> cast) — cast was circular when BackendType derived from registry
+- [Phase 13-01]: BACKEND_SCHEMAS auto-generated via Object.fromEntries over registry keys — no per-backend buildZodSchema call needed
+- [Phase 13-01]: Registry has 18 backends (http and seafile are separate entries; plan's "17" was a counting error)
 
 ### Roadmap Evolution
 
@@ -88,6 +92,6 @@ None yet.
 
 ## Session Continuity
 
-Last session: 2026-04-01T12:27:37.494Z
+Last session: 2026-04-01T16:20:00Z
-Stopped at: Phase 13 context gathered
+Stopped at: Completed 13-01-PLAN.md
-Resume file: .planning/phases/13-add-remaining-rclone-remotes/13-CONTEXT.md
+Resume file: .planning/phases/13-add-remaining-rclone-remotes/13-01-SUMMARY.md

.planning/phases/13-add-remaining-rclone-remotes/13-01-SUMMARY.md

@@ -0,0 +1,141 @@
+---
+phase: 13-add-remaining-rclone-remotes
+plan: 01
+subsystem: api
+tags: [rclone, typescript, zod, registry, backend-expansion]
+
+requires:
+  - phase: 09-md3-components
+    provides: FieldDef interface and TextFieldMD3 rendering contract used for field helpText guidance
+  - phase: 06-rclone-generator
+    provides: buildRcloneConf, RCLONE_TYPE_MAP, BACKEND_SCHEMAS patterns used throughout
+
+provides:
+  - "18-backend BACKEND_REGISTRY with category field as single source of truth"
+  - "BackendType derived from keyof typeof BACKEND_REGISTRY (no manual union)"
+  - "BackendCategory type with 3 valid values"
+  - "BACKEND_SCHEMAS auto-generated from registry keys via Object.fromEntries"
+  - "RCLONE_TYPE_MAP covering all 18 backends with verified rclone type strings"
+
+affects:
+  - 13-02 (UI - BackendSelectionStep overhaul, categories, search)
+  - 13-03 (RemoteConfigStep - new backend config forms)
+  - any future phase adding rclone backends
+
+tech-stack:
+  added: []
+  patterns:
+    - "BackendType derived from keyof typeof BACKEND_REGISTRY — no manual union maintenance"
+    - "BACKEND_SCHEMAS auto-generated via Object.fromEntries over registry keys — zero per-backend boilerplate"
+    - "BackendMeta interface types individual entries; registry uses as const for keyof narrowing"
+    - "RCLONE_TYPE_MAP exported for direct test coverage"
+
+key-files:
+  created: []
+  modified:
+    - src/schemas/registry.ts
+    - src/schemas/registry.test.ts
+    - src/schemas/index.ts
+    - src/schemas/index.test.ts
+    - src/generators/rclone-conf.ts
+    - src/generators/rclone-conf.test.ts
+    - src/components/wizard/BackendSelectionStep.test.tsx
+
+key-decisions:
+  - "BackendType is derived from keyof typeof BACKEND_REGISTRY — eliminates manual union maintenance at 18+ backends"
+  - "Registry uses as const (not a Record<BackendType,...> cast) — the cast was circular when BackendType derived from registry"
+  - "BACKEND_SCHEMAS auto-generated from Object.keys(BACKEND_REGISTRY) — no per-backend buildZodSchema call needed"
+  - "Google Drive supports both OAuth token and service account paths via two optional fields — GdriveAuthToggle deferred to 13-03"
+  - "Registry has 18 backends (not 17 as plan stated) — research doc listed http and seafile as separate items making count 18"
+  - "RCLONE_TYPE_MAP exported for exhaustiveness testing"
+
+patterns-established:
+  - "Registry-driven type derivation: add backend once in BACKEND_REGISTRY, all downstream (BackendType, BACKEND_SCHEMAS) auto-update"
+  - "BackendCategory field in registry entry — single source of truth for UI grouping (no separate category map)"
+
+requirements-completed: [REMOTE-01, REMOTE-02, REMOTE-06]
+
+duration: 10min
+completed: 2026-04-01
+---
+
+# Phase 13 Plan 01: Registry Refactor and 18-Backend Expansion Summary
+
+**BACKEND_REGISTRY expanded from 7 to 18 backends with derived BackendType, BackendCategory, and auto-generated BACKEND_SCHEMAS — zero per-backend boilerplate for future additions**
+
+## Performance
+
+- **Duration:** ~10 min
+- **Started:** 2026-04-01T16:13:00Z
+- **Completed:** 2026-04-01T16:20:00Z
+- **Tasks:** 2
+- **Files modified:** 7
+
+## Accomplishments
+
+- Registry expanded with 11 new backends: azure-files, swift, gdrive, dropbox, box, pcloud, ftp, webdav, smb, http, seafile
+- BackendType now derived from `keyof typeof BACKEND_REGISTRY` — adding a backend no longer requires touching a manual union type
+- BACKEND_SCHEMAS auto-generated from registry keys — no per-backend `buildZodSchema()` call needed
+- RCLONE_TYPE_MAP covers all 18 backends with verified rclone type strings
+- Test count grew from 63 to 266 (all green, no regressions)
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Refactor registry types and add all 10 new backend entries** - `b8c6493` (feat)
+2. **Task 2: Auto-generate BACKEND_SCHEMAS, update RCLONE_TYPE_MAP, update tests** - `3010cdb` (feat)
+
+## Files Created/Modified
+
+- `src/schemas/registry.ts` - Added BackendCategory type, BackendMeta interface, category field on all entries, 11 new backends, BackendType derived from keyof
+- `src/schemas/registry.test.ts` - Expanded from 24 to 48 tests; covers all 18 backends, category assertions, new backend field validation
+- `src/schemas/index.ts` - Replaced explicit BACKEND_SCHEMAS object with Object.fromEntries auto-generation
+- `src/schemas/index.test.ts` - Added 3 auto-generation tests + 4 new backend schema smoke tests (ftp, smb, seafile, dropbox)
+- `src/generators/rclone-conf.ts` - RCLONE_TYPE_MAP expanded to 18 entries, exported for test access
+- `src/generators/rclone-conf.test.ts` - Added RCLONE_TYPE_MAP exhaustiveness test + gdrive/ftp/smb conf output tests
+- `src/components/wizard/BackendSelectionStep.test.tsx` - Fixed /next/i button selector ambiguity (Rule 1 bug fix)
+
+## Decisions Made
+
+- BackendType is derived from `keyof typeof BACKEND_REGISTRY` — eliminates manual union maintenance at 18+ backends
+- The `as Record<BackendType,...>` cast at the bottom of the registry was circular when BackendType derived from registry keys — removed it; `as const` provides full inference
+- Google Drive supports both OAuth token and service account auth paths via two optional fields (`token` and `service_account_credentials`) — GdriveAuthToggle component deferred to plan 13-03 (UI work)
+- Registry ended up with 18 backends (plan said 17) — research doc listed `http` and `seafile` as separate entries making the correct count 18; test assertions updated to match reality
+- RCLONE_TYPE_MAP exported for direct exhaustiveness testing
+
+## Deviations from Plan
+
+### Auto-fixed Issues
+
+**1. [Rule 1 - Bug] Fixed BackendSelectionStep test broken by WebDAV "NextCloud" description**
+- **Found during:** Task 2 (full test suite run)
+- **Issue:** Test used `getByRole('button', { name: /next/i })` — matched both the WebDAV card (description contains "NextCloud") and the actual Next submit button after new backends were added
+- **Fix:** Changed to `getByRole('button', { name: 'Next' })` (exact match) to target only the submit button
+- **Files modified:** `src/components/wizard/BackendSelectionStep.test.tsx`
+- **Verification:** All 266 tests pass, full suite green
+- **Committed in:** `3010cdb` (Task 2 commit)
+
+---
+
+**Total deviations:** 1 auto-fixed (Rule 1 - bug triggered by new data)
+**Impact on plan:** Minor test fix required by our own data addition. No scope creep.
+
+## Issues Encountered
+
+- Registry backend count was 18 not 17 — research doc included both `http` and `seafile` as separate entries, the "17" in the plan was a counting error. Updated test assertions and SUMMARY to reflect the actual correct count.
+
+## User Setup Required
+
+None - no external service configuration required.
+
+## Next Phase Readiness
+
+- Registry foundation complete — all 18 backends have entries, types are derived, schemas auto-generate
+- Plan 13-02 can now proceed with BackendSelectionStep UI overhaul (category headings, search filter, backend cards for all 18)
+- Plan 13-03 can proceed with RemoteConfigStep new backend config forms
+- BackendType is now available as a union of 18 values wherever `import type { BackendType } from '../schemas/registry'` is used
+
+---
+*Phase: 13-add-remaining-rclone-remotes*
+*Completed: 2026-04-01*