---
phase: 06-new-backends
plan: "01"
subsystem: api
tags: [rclone, onedrive, gcs, b2, registry, zod, typescript]

# Dependency graph
requires:
  - phase: 06-00
    provides: "Wave 0 RED test stubs for registry, rclone-conf, and RemoteConfigStep — test infrastructure established"
provides:
  - "BackendType union extended to 7 types: azureblob, s3, s3-compatible, onedrive, sftp, gcs, b2"
  - "BACKEND_REGISTRY entries for onedrive, gcs, b2 with rclone-accurate field keys"
  - "BACKEND_SCHEMAS covers onedrive, gcs, b2 via buildZodSchema"
  - "RCLONE_TYPE_MAP with gcs mapped to 'google cloud storage' (with spaces)"
affects:
  - 06-02
  - 06-03

# Tech tracking
tech-stack:
  added: []
  patterns:
    - "registry-driven schema generation: buildZodSchema(BackendType) derives Zod shapes from BACKEND_REGISTRY automatically"
    - "RCLONE_TYPE_MAP: BackendType key -> rclone internal type string, with space-containing values for gcs"

key-files:
  created: []
  modified:
    - src/schemas/registry.ts
    - src/schemas/index.ts
    - src/generators/rclone-conf.ts

key-decisions:
  - "GCS rclone type = 'google cloud storage' (with spaces) not 'gcs' — verified against rclone docs, test asserts not.toContain('type = gcs')"
  - "OneDrive uses token (OAuth JSON), drive_id, drive_type fields — paste-based token flow (no live OAuth in app)"
  - "B2 uses account (applicationKeyId) and key (application key secret) — matches rclone b2 docs field names exactly"
  - "GCS uses project_number + service_account_credentials (not service_account_file) — paste-based credentials flow"

patterns-established:
  - "All new backends follow pure registry + FieldRenderer pattern: add fields to BACKEND_REGISTRY, BACKEND_SCHEMAS and RCLONE_TYPE_MAP update automatically"

requirements-completed:
  - BACK-01
  - BACK-03
  - BACK-04

# Metrics
duration: 5min
completed: 2026-03-30
---

# Phase 6 Plan 01: OneDrive, GCS, B2 Data Layer Summary

**OneDrive, GCS, and B2 added to BackendType union, BACKEND_REGISTRY, BACKEND_SCHEMAS, and RCLONE_TYPE_MAP — all 55 registry and rclone-conf tests pass with gcs correctly mapped to 'google cloud storage'**

## Performance

- **Duration:** ~5 min
- **Started:** 2026-03-30T16:13:36Z
- **Completed:** 2026-03-30T16:13:36Z
- **Tasks:** 2
- **Files modified:** 3

## Accomplishments
- BackendType union extended from 3 to 7 values (onedrive, sftp, gcs, b2 added)
- BACKEND_REGISTRY populated with onedrive (token/drive_id/drive_type), gcs (project_number/service_account_credentials), b2 (account/key) entries
- BACKEND_SCHEMAS and RCLONE_TYPE_MAP extended — gcs maps to 'google cloud storage' (with spaces per rclone docs)
- All 55 registry and rclone-conf tests GREEN; zero TypeScript errors

## Task Commits

Both plan tasks were implemented together in a single atomic commit:

1. **Task 1: Extend registry.ts — BackendType union + onedrive/gcs/b2 entries** - `c1d61d3` (feat)
2. **Task 2: Extend index.ts and rclone-conf.ts — schemas + type map for onedrive/gcs/b2** - `c1d61d3` (feat)

Note: Tasks 1 and 2 were committed together in commit `c1d61d3 feat(06-02)` which was executed before this plan's formal execution run. The commit message references 06-02 because the agent session that created it ran Plan 02's implementation and included Plan 01's changes in the same commit.

## Files Created/Modified
- `src/schemas/registry.ts` - BackendType union extended to 7 types; onedrive/gcs/b2/sftp BACKEND_REGISTRY entries added
- `src/schemas/index.ts` - BACKEND_SCHEMAS extended with onedrive, sftp, gcs, b2 via buildZodSchema
- `src/generators/rclone-conf.ts` - RCLONE_TYPE_MAP extended with onedrive, sftp, gcs ('google cloud storage'), b2

## Decisions Made
- GCS rclone type string is 'google cloud storage' (with spaces) not 'gcs' — critical: test explicitly asserts not.toContain('type = gcs')
- OneDrive uses paste-based OAuth token (JSON) rather than live OAuth flow — keeps app stateless
- B2 field names 'account' and 'key' match rclone b2 config key names exactly
- GCS field 'service_account_credentials' uses paste-based JSON approach (not file path) for browser environment

## Deviations from Plan

### Implementation Pre-committed by Adjacent Plan Execution

All three files (registry.ts, index.ts, rclone-conf.ts) were already fully implemented when this plan executed. Commit `c1d61d3` (labeled feat(06-02)) included all Plan 01 changes alongside Plan 02's sftp entry because the previous agent session ran Plan 02 implementation first.

The plan's verification criteria are fully met:
- BackendType union has all 7 types: confirmed
- onedrive/gcs/b2 registry entries with correct rclone keys: confirmed
- BACKEND_SCHEMAS covers onedrive/gcs/b2: confirmed
- gcs maps to 'google cloud storage' in RCLONE_TYPE_MAP: confirmed
- rclone-conf tests pass for onedrive/gcs/b2: 55/55 tests GREEN
- Zero TypeScript errors outside sftp-missing-key: confirmed (no TypeScript errors at all — sftp entry is present)

---

**Total deviations:** 0 functional deviations — plan executed correctly. Implementation ordering deviation noted (Plan 02 agent pre-implemented Plan 01 changes).

## Issues Encountered
None — all files were already correctly implemented.

## User Setup Required
None - no external service configuration required.

## Next Phase Readiness
- Data layer complete for onedrive/gcs/b2 — Plan 02 (SFTP) data layer also complete in same commit
- Plan 03 can wire RemoteConfigStep to use BACKEND_REGISTRY for dynamic backend selection
- No blockers

---
*Phase: 06-new-backends*
*Completed: 2026-03-30*