docs(08.1-01): complete agent output schema plan

Tasks completed: 3/3
- Define agent output schema with Zod
- Update ClaudeAgentManager to use schema and handle question flow
- Update AgentWaitingEvent to include structured question data

SUMMARY: .planning/phases/08.1-agent-output-schema/08.1-01-SUMMARY.md

.planning/STATE.md

@@ -9,19 +9,19 @@ See: .planning/PROJECT.md (updated 2026-01-30)
 
 ## Current Position
 
-Phase: 8 of 9 (E2E Scenario Tests)
-Plan: 2 of 2 in current phase
+Phase: 8.1 of 9 (Agent Output Schema)
+Plan: 1 of 1 in current phase
 Status: Phase complete
-Last activity: 2026-01-31 — Completed 08-02-PLAN.md
+Last activity: 2026-01-31 — Completed 08.1-01-PLAN.md
 
-Progress: ████████░░ 80%
+Progress: █████████░ 85%
 
 ## Performance Metrics
 
 **Velocity:**
-- Total plans completed: 31
+- Total plans completed: 32
 - Average duration: 3 min
-- Total execution time: 96 min
+- Total execution time: 101 min
 
 **By Phase (v1.0):**
 
@@ -36,7 +36,7 @@ Progress: ████████░░ 80%
 | 6 | 3/3 | 9 min | 3 min |
 
 **Recent Trend:**
-- Last 5 plans: 08-02 (3 min), 08-01 (3 min), 07-02 (4 min), 07-01 (2 min), 06-03 (3 min)
+- Last 5 plans: 08.1-01 (5 min), 08-02 (3 min), 08-01 (3 min), 07-02 (4 min), 07-01 (2 min)
 - Trend: Steady
 
 ## Accumulated Context
@@ -110,6 +110,9 @@ Recent decisions affecting current work:
 - 08-02: Agent crash tests verify task stays in_progress (not completed)
 - 08-02: Merge conflict tests require manual agentRepository seeding
 - 08-02: MockWorktreeManager setMergeResult for conflict scenarios
+- 08.1-01: Discriminated union with done/question/unrecoverable_error for agent output
+- 08.1-01: JSON schema passed to Claude CLI for validated output
+- 08.1-01: Options and multiSelect fields for structured question choices
 
 ### Pending Todos
 
@@ -129,5 +132,5 @@ None yet.
 ## Session Continuity
 
 Last session: 2026-01-31
-Stopped at: Completed 08-02-PLAN.md (Phase 8 complete)
+Stopped at: Completed 08.1-01-PLAN.md (Phase 8.1 complete)
 Resume file: None