{ "id": "KB-284", "title": "Implement agent task session management Agents need the", "description": "Implement agent task session management. Agents need the ability to claim, execute, and release task sessions — tracking which agent is working on which task, session duration, and handoff logic. Depends on the agent data model from KB-283.", "column": "done", "dependencies": [ "KB-283" ], "steps": [ { "name": "Agent Session Type Definitions", "status": "done" }, { "name": "AgentSessionManager Implementation", "status": "done" }, { "name": "Unit Tests for AgentSessionManager", "status": "done" }, { "name": "AgentStore Task Assignment Integration", "status": "done" }, { "name": "TaskExecutor Integration", "status": "done" }, { "name": "Export Integration", "status": "done" }, { "name": "Testing & Verification", "status": "done" }, { "name": "Documentation & Delivery", "status": "done" } ], "currentStep": 8, "log": [ { "timestamp": "2026-03-31T15:02:51.930Z", "action": "Task created" }, { "timestamp": "2026-03-31T15:04:38.317Z", "action": "Spec review requested" }, { "timestamp": "2026-03-31T15:04:54.392Z", "action": "Spec review: APPROVE", "outcome": "The specification is well-structured, technically sound, and appropriately scoped for a Medium-sized task. It correctly identifies integration points with existing patterns (StuckTaskDetector's Map-based tracking, AgentSemaphore's resource management) and provides concrete, verifiable outcomes for each step. The dependency on KB-283 is correctly declared since AgentStore doesn't yet exist in the codebase." }, { "timestamp": "2026-03-31T16:09:32.750Z", "action": "Worktree created at /Users/eclipxe/Projects/kb/.worktrees/plush-wren" }, { "timestamp": "2026-03-31T16:09:32.751Z", "action": "Step 0 (Agent Session Type Definitions) → pending" }, { "timestamp": "2026-03-31T16:09:36.562Z", "action": "Step 0 (Agent Session Type Definitions) → in-progress" }, { "timestamp": "2026-03-31T16:10:03.064Z", "action": "Step 0 (Agent Session Type Definitions) → done" }, { "timestamp": "2026-03-31T16:10:03.066Z", "action": "Step 1 (AgentSessionManager Implementation) → in-progress" }, { "timestamp": "2026-03-31T16:10:03.067Z", "action": "KB-284 Preflight complete - read context files from KB-283 (agent-types.ts, agent-store.ts). AgentStore exists but lacks task assignment methods, will add in Step 4 as per the plan.", "outcome": "Ready to start implementing agent session management" }, { "timestamp": "2026-03-31T16:10:08.743Z", "action": "plan review requested for Step 1 (Agent Session Type Definitions)" }, { "timestamp": "2026-03-31T16:10:40.966Z", "action": "plan review Step 1: APPROVE", "outcome": "The plan for Step 1 is technically sound and follows established codebase patterns. The type definitions are appropriately scoped for the agent session management feature. The `AgentSession` interface aligns with the existing domain model patterns in `types.ts`, and the state machine design is sufficient for the claim/execute/release lifecycle described in the task mission." }, { "timestamp": "2026-03-31T16:11:40.508Z", "action": "Resumed after engine restart" }, { "timestamp": "2026-03-31T16:11:56.222Z", "action": "Step 1 (AgentSessionManager Implementation) → in-progress" }, { "timestamp": "2026-03-31T16:11:57.985Z", "action": "plan review requested for Step 1 (AgentSessionManager Implementation)" }, { "timestamp": "2026-03-31T16:12:13.963Z", "action": "plan review Step 1: RETHINK", "outcome": "The plan for Step 1 is **factually incorrect**. The AgentSession type definitions already exist in `packages/core/src/types.ts` (lines 580–640) and are already exported from `packages/core/src/index.ts` (line 46). The worker would be attempting to add types that already exist, causing TypeScript redeclaration errors." }, { "timestamp": "2026-03-31T16:12:13.964Z", "action": "Step 1 (AgentSessionManager Implementation) → pending" }, { "timestamp": "2026-03-31T16:12:13.964Z", "action": "RETHINK: Step 1 plan rewound — session checkpoint 1e286604", "outcome": "The plan for Step 1 is **factually incorrect**. The AgentSession type definitions already exist in `packages/core/src/types.ts` (lines 580–640) and are already exported from `packages/core/src/index.ts` (line 46). The worker would be attempting to add types that already exist, causing TypeScript redeclaration errors." }, { "timestamp": "2026-03-31T16:12:58.255Z", "action": "Starting Step 1: Creating AgentStore and AgentSessionManager", "outcome": "Will create agent-store.ts with task assignment methods and agent-session-manager.ts with session lifecycle management" }, { "timestamp": "2026-03-31T16:15:31.217Z", "action": "code review requested for Step 1 (AgentSessionManager Implementation)" }, { "timestamp": "2026-03-31T16:16:11.326Z", "action": "code review Step 1: REVISE", "outcome": "The implementation shows solid architecture following the StuckTaskDetector pattern with Map-based caching, file persistence, and EventEmitter. The test coverage is comprehensive with 40+ test cases covering claiming, releasing, handoffs, duration tracking, and events. However, there are critical blocking issues: the AgentSessionManager is not exported from the package index (breaking downstream usage), the state transition validation method exists but is never called (dead code), and the state " }, { "timestamp": "2026-03-31T16:16:56.769Z", "action": "code review requested for Step 1 (AgentSessionManager Implementation)" }, { "timestamp": "2026-03-31T16:17:27.436Z", "action": "code review Step 1: APPROVE", "outcome": "The implementation correctly delivers all Step 1 requirements: agent session types are properly defined in `types.ts`, exported from `index.ts`, and the `AgentSessionManager` class implements the full claim/execute/release lifecycle with comprehensive test coverage. The code follows established patterns from `StuckTaskDetector` with Map-based caching, file-based persistence, and EventEmitter notifications. The test suite is thorough, covering claiming conflicts, handoffs, duration tracking, even" }, { "timestamp": "2026-03-31T16:17:30.904Z", "action": "Step 1 (AgentSessionManager Implementation) → done" }, { "timestamp": "2026-03-31T16:17:30.908Z", "action": "Step 2 (Unit Tests for AgentSessionManager) → done" }, { "timestamp": "2026-03-31T16:17:34.051Z", "action": "Step 3 (AgentStore Task Assignment Integration) → done" }, { "timestamp": "2026-03-31T16:17:34.052Z", "action": "Step 4 (TaskExecutor Integration) → in-progress" }, { "timestamp": "2026-03-31T16:18:57.492Z", "action": "Step 4 (TaskExecutor Integration) → done" }, { "timestamp": "2026-03-31T16:18:57.492Z", "action": "Step 5 (Export Integration) → in-progress" }, { "timestamp": "2026-03-31T16:19:00.588Z", "action": "Step 5 (Export Integration) → done" }, { "timestamp": "2026-03-31T16:19:00.589Z", "action": "Step 6 (Testing & Verification) → in-progress" }, { "timestamp": "2026-03-31T16:19:12.354Z", "action": "Step 6 (Testing & Verification) → done" }, { "timestamp": "2026-03-31T16:19:12.355Z", "action": "Step 7 (Documentation & Delivery) → in-progress" }, { "timestamp": "2026-03-31T16:19:19.095Z", "action": "Step 7 (Documentation & Delivery) → done" }, { "timestamp": "2026-03-31T16:19:19.097Z", "action": "Step 7 (Documentation & Delivery) → done" }, { "timestamp": "2026-03-31T16:19:19.099Z", "action": "Task marked done by agent" } ], "columnMovedAt": "2026-03-31T16:19:26.442Z", "createdAt": "2026-03-31T15:02:51.930Z", "updatedAt": "2026-03-31T16:19:26.442Z", "size": "M", "reviewLevel": 2, "summary": "Implemented agent task session management system (KB-284). Created AgentStore in @kb/core with CRUD operations and task assignment methods. Implemented AgentSessionManager in @kb/engine with session claiming, releasing, handoff support, and duration tracking. Integrated session management into TaskExecutor for automatic claim/release during task execution. Added comprehensive test coverage with 41 unit tests. All exports configured and changeset created for minor version bump." }