kandev/docs/plans/task-create-workflow-memory/task-01-backend-workflow-memory.md

id, title, status, wave, depends_on, plan, spec

id	title	status	wave	depends_on	plan	spec
01-backend-workflow-memory	Persist per-workspace workflow memory	done	1		plan.md	../../specs/tasks/task-create-workflow-memory.md

Task 01: Persist Per-Workspace Workflow Memory

Intent

Extend the backend-owned task-create preference so every successful HTTP or WebSocket task creation records its effective workflow under the task's workspace without clobbering another workspace's history.

Acceptance

• task_create_last_used.workflow_ids_by_workspace round-trips through the model, user-settings response/event, and boot payload; missing maps remain backward compatible.
• SQLite and PostgreSQL patch builders update individual workspace entries and preserve other workspace entries plus repository, branch, agent, and executor preferences.
• Successful HTTP and WebSocket task creation record the request's workspace and effective workflow, while preference-write failure remains non-fatal to task creation.

TDD sequence

1. Extend handler recorder tests for HTTP and WebSocket creation and confirm RED because workflow history is absent.
2. Add SQLite repository and PostgreSQL query-builder regressions that preserve two workspace entries across partial updates; confirm RED before store changes.
3. Add the model, service emptiness rule, targeted JSON patches, transport wiring, event mapping, and boot mapping.
4. Run the focused backend packages and keep every existing last-used field regression green.

Files likely touched

• apps/backend/internal/user/models/models.go
• apps/backend/internal/user/service/service.go
• apps/backend/internal/user/service/service_test.go
• apps/backend/internal/user/store/sqlite.go
• apps/backend/internal/user/store/sqlite_test.go
• apps/backend/internal/task/handlers/task_http_handlers.go
• apps/backend/internal/task/handlers/task_http_handlers_test.go
• apps/backend/internal/task/handlers/task_ws_handlers.go
• apps/backend/internal/backendapp/boot_state_routes.go
• apps/backend/internal/backendapp/boot_state_routes_test.go

Dependencies

None.

Parallelism

sequential — this task owns the shared persisted JSON contract consumed by all later tasks.

Inputs

• Spec sections Data model, Persistence guarantees, and the HTTP/WebSocket recording scenarios.
• ADR 0028, ADR 0041, and ADR-2026-08-08-workspace-scoped-task-create-workflow-memory.
• Existing makeTaskCreateLastUsedJSONSetArgs, applyPostgresTaskCreateLastUsedPatch, buildTaskCreateLastUsedPatch, and mapTaskCreateLastUsed patterns.

Verification

• cd apps/backend && go test ./internal/user/store ./internal/user/service ./internal/task/handlers ./internal/backendapp

Risks

• Workspace IDs must be represented through safe JSON paths rather than raw SQL interpolation.
• A whole-map replacement would pass a one-workspace test while losing history during alternating workspace writes; the regression must assert two keys.

Output contract

Report RED evidence, changed files, focused Go test results/counts, SQLite and PostgreSQL path coverage, blockers, risks, and synchronize this task plus plan.md status/results in the primary conversation.

Results

Implemented the workspace-scoped workflow map in the existing user-settings JSON contract. HTTP and WebSocket task creation now record the effective workspace/workflow pair after successful creation; SQLite and PostgreSQL updates patch individual map entries while preserving existing preferences and other workspace history. Boot-state and service/event mappings normalize missing maps for backwards compatibility.

TDD RED evidence included handler recorder assertions failing with a missing workflow map before transport wiring, followed by the store/service compile adjustments required by the new map field. Final verification:

cd apps/backend && go test ./internal/user/store ./internal/user/service ./internal/task/handlers ./internal/backendapp

All four packages passed, including real SQLite preservation coverage and parameterized PostgreSQL query-builder coverage.