Preflight checks
Problem
Workspace profiles are persisted, but the core has no platform-neutral controller for coordinating workspace, tab, and terminal-session lifecycle across create, select, update, close, restart, and process recovery. Without durable lifecycle intent, retries after session or persistence failures can orphan sessions, double-close them, lose tab identity, or incorrectly report success.
Proposed solution
Add an injected session-lifecycle port and a WorkspaceController in splice-core. Persist the minimum start/close intent needed to make lifecycle operations idempotent across controller reconstruction; expose stable four-field error contracts (code, message, platform, retryable); preserve workspace isolation; attempt all profiles during recovery while returning the first structured failure. Keep this slice platform-neutral with no Tauri command registration or desktop UI.
The implementation is PR11a of the 17-PR stacked-to-master delivery chain and completes SDD task 4.2a. PR11/task 4.2b is the next slice. The maintainer-approved size:exception covers 1,062 additions across exactly four files because the lifecycle controller and its failure-semantics tests form one rollback-safe work unit; splitting code from these tests would make the review and rollback boundary unsafe.
Affected area
Desktop backend (Rust)
Alternatives considered
Keeping lifecycle state only in memory fails across process/controller reconstruction. Splitting tests from implementation violates the work-unit boundary. Tauri/UI wiring is intentionally deferred to task 4.2b.
Additional context
Approved native review: review-669bd35827f792b8 (candidate97b59f...). SDD verification passed with warnings: the unchanged Linux desktop differential baseline remains 23/24 because the Windows-only command returns UnsupportedPlatform; no Tauri/UI behavior is changed here. Rollback is the exact four-file projection: remove workspace_lifecycle.rs and its integration test, then revert the exports and profile lifecycle persistence fields/store listing additions.
Preflight checks
status:approvedbefore work begins or a pull request is opened.Problem
Workspace profiles are persisted, but the core has no platform-neutral controller for coordinating workspace, tab, and terminal-session lifecycle across create, select, update, close, restart, and process recovery. Without durable lifecycle intent, retries after session or persistence failures can orphan sessions, double-close them, lose tab identity, or incorrectly report success.
Proposed solution
Add an injected session-lifecycle port and a
WorkspaceControllerinsplice-core. Persist the minimum start/close intent needed to make lifecycle operations idempotent across controller reconstruction; expose stable four-field error contracts (code,message,platform,retryable); preserve workspace isolation; attempt all profiles during recovery while returning the first structured failure. Keep this slice platform-neutral with no Tauri command registration or desktop UI.The implementation is PR11a of the 17-PR stacked-to-master delivery chain and completes SDD task 4.2a. PR11/task 4.2b is the next slice. The maintainer-approved
size:exceptioncovers 1,062 additions across exactly four files because the lifecycle controller and its failure-semantics tests form one rollback-safe work unit; splitting code from these tests would make the review and rollback boundary unsafe.Affected area
Desktop backend (Rust)
Alternatives considered
Keeping lifecycle state only in memory fails across process/controller reconstruction. Splitting tests from implementation violates the work-unit boundary. Tauri/UI wiring is intentionally deferred to task 4.2b.
Additional context
Approved native review:
review-669bd35827f792b8(candidate97b59f...). SDD verification passed with warnings: the unchanged Linux desktop differential baseline remains 23/24 because the Windows-only command returnsUnsupportedPlatform; no Tauri/UI behavior is changed here. Rollback is the exact four-file projection: removeworkspace_lifecycle.rsand its integration test, then revert the exports and profile lifecycle persistence fields/store listing additions.