[QA] ✅ VERIFICATION COMPLETE All session data models have been verified and pass QA: **Test Results:** 161/161 tests PASSED ✓ **Models Verified:** - SessionStatus enum (6 values) ✓ - SessionConfig (30+ fields) ✓ - SessionInfo ✓ - SessionMessage ✓ - TokenUsage ✓ - ModelUsage (camelCase for CLI compatibility) ✓ - SessionResult ✓ **QA Criteria:** - [x] All models match SPEC.md definitions exactly - [x] SessionConfig validates all CLI flag combinations - [x] SessionStatus enum has all 6 specified values - [x] Models serialize to JSON matching spec examples - [x] Optional fields have correct defaults **Evidence:** - Complete field-by-field comparison against SPEC.md - All type annotations match specification - All defaults match specification - Full test suite passes without errors **Detailed QA report:** /tmp/qa-CLIAPI-7.md **Status:** APPROVED for merge to main

## Implementation Complete **Changes made:** - Implemented all session models in `src/cli_agent_api/models/session.py`: - `SessionStatus` enum with all 6 statuses (pending, running, waiting_permission, completed, failed, cancelled) - `SessionConfig` model with 30+ fields for all CLI flags per SPEC.md - `SessionInfo` model for session metadata and progress tracking - `SessionMessage` model for parsed JSONL messages - `TokenUsage` model for token usage breakdown - `ModelUsage` model for per-model usage statistics (camelCase to match CLI output) - `SessionResult` model for completed session results - Updated `src/cli_agent_api/models/__init__.py` to export all new models **Verification:** - All 161 unit tests pass - Models import correctly and serialize to JSON - New code passes all linting checks **QA Criteria Status:** - [x] All models match SPEC.md definitions exactly - [x] SessionConfig validates all CLI flag combinations - [x] SessionStatus enum has all 6 specified values - [x] Models serialize to JSON matching spec examples - [x] Optional fields have correct defaults

## Feature Triage Complete **Status:** PARTIALLY IMPLEMENTED (empty stub file exists) **Summary:** The session.py model file exists but is empty. All models defined in SPEC.md (SessionConfig, SessionStatus, SessionInfo, SessionResult, TokenUsage, ModelUsage, SessionMessage) need to be implemented. This is a low-complexity transcription task from the detailed SPEC.md definitions. **Implementation Location:** `src/cli_agent_api/models/session.py` **Complexity:** LOW - Straightforward Pydantic model definitions from spec **Dependencies:** None - Pydantic already in project dependencies See attached triage report for full details.