docs(05-02): complete open mode plan

Tasks completed: 3/3
- Create orchestrator module with parallel query function
- Implement /open command handler with database persistence
- Update help text for discussion commands

SUMMARY: .planning/phases/05-multi-model-discussions/05-02-SUMMARY.md

.planning/ROADMAP.md

@@ -76,5 +76,5 @@ Phases execute in numeric order: 1 → 2 → 3 → 4 → 5 → 6
 | 2. Bot Core | 2/2 | Complete | 2026-01-16 |
 | 3. Project CRUD | 3/3 | Complete | 2026-01-16 |
 | 4. Single Model Q&A | 2/2 | Complete | 2026-01-16 |
-| 5. Multi-Model Discussions | 1/4 | In progress | - |
+| 5. Multi-Model Discussions | 2/4 | In progress | - |
 | 6. Consensus & Export | 0/TBD | Not started | - |

.planning/STATE.md

@@ -10,18 +10,18 @@ See: .planning/PROJECT.md (updated 2026-01-16)
 ## Current Position
 
 Phase: 5 of 6 (Multi-Model Discussions)
-Plan: 1 of 4 in current phase
+Plan: 2 of 4 in current phase
 Status: In progress
-Last activity: 2026-01-16 — Completed 05-01-PLAN.md (discussion service)
+Last activity: 2026-01-16 — Completed 05-02-PLAN.md (open mode)
 
-Progress: ███████░░░ ~70%
+Progress: ████████░░ ~75%
 
 ## Performance Metrics
 
 **Velocity:**
-- Total plans completed: 11
+- Total plans completed: 12
 - Average duration: 4 min
-- Total execution time: 0.7 hours
+- Total execution time: 0.75 hours
 
 **By Phase:**
 
@@ -31,10 +31,10 @@ Progress: ███████░░░ ~70%
 | 02-bot-core | 2 | 4 min | 2 min |
 | 03-project-crud | 3 | 11 min | 4 min |
 | 04-single-model-qa | 2 | 10 min | 5 min |
-| 05-multi-model | 1 | 2 min | 2 min |
+| 05-multi-model | 2 | 5 min | 2.5 min |
 
 **Recent Trend:**
-- Last 5 plans: 03-03 (5 min), 04-01 (5 min), 04-02 (5 min), 05-01 (2 min)
+- Last 5 plans: 04-01 (5 min), 04-02 (5 min), 05-01 (2 min), 05-02 (3 min)
 - Trend: Fast
 
 ## Accumulated Context
@@ -64,6 +64,8 @@ Recent decisions affecting current work:
 - **04-01:** Module-level singleton for AI client (matches database pattern)
 - **04-02:** AI client initialized in post_init alongside database
 - **04-02:** Typing indicator shown while waiting for AI response
+- **05-02:** asyncio.gather for parallel model queries with graceful per-model error handling
+- **05-02:** SYSTEM_PROMPT includes participant list and topic for roundtable context
 
 ### Deferred Issues
 
@@ -75,6 +77,6 @@ None yet.
 
 ## Session Continuity
 
-Last session: 2026-01-16T19:26:56Z
-Stopped at: Completed 05-01-PLAN.md (discussion service)
+Last session: 2026-01-16T19:37:57Z
+Stopped at: Completed 05-02-PLAN.md (open mode)
 Resume file: None

.planning/phases/05-multi-model-discussions/05-02-SUMMARY.md

@@ -0,0 +1,101 @@
+---
+phase: 05-multi-model-discussions
+plan: 02
+subsystem: api
+tags: [asyncio, telegram, ai-orchestration, parallel-queries]
+
+# Dependency graph
+requires:
+  - phase: 05-multi-model-discussions/01
+    provides: Discussion service CRUD operations
+  - phase: 04-single-model-qa/02
+    provides: AIClient.complete() and typing indicator pattern
+provides:
+  - orchestrator module with query_models_parallel()
+  - /open command for parallel multi-model queries
+  - Discussion/Round/Message persistence for open mode
+affects: [05-03-discuss-mode, 05-04-mentions, 06-consensus]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns: [asyncio.gather for parallel AI calls, per-model error handling]
+
+key-files:
+  created: [src/moai/core/orchestrator.py]
+  modified: [src/moai/bot/handlers/discussion.py, src/moai/bot/handlers/__init__.py, src/moai/bot/handlers/commands.py]
+
+key-decisions:
+  - "asyncio.gather for parallel model queries with graceful per-model error handling"
+  - "SYSTEM_PROMPT includes participant list and topic for roundtable context"
+
+patterns-established:
+  - "query_models_parallel returns dict[str, str] mapping model → response"
+  - "Individual model failures don't block other model responses"
+
+issues-created: []
+
+# Metrics
+duration: 3min
+completed: 2026-01-16
+---
+
+# Phase 5 Plan 2: Open Mode Summary
+
+**Parallel multi-model queries via /open command with asyncio.gather orchestration and database persistence**
+
+## Performance
+
+- **Duration:** 3 min
+- **Started:** 2026-01-16T19:34:44Z
+- **Completed:** 2026-01-16T19:37:57Z
+- **Tasks:** 3
+- **Files modified:** 4
+
+## Accomplishments
+
+- Created orchestrator module with SYSTEM_PROMPT and query_models_parallel() using asyncio.gather
+- Implemented /open command that queries all project models simultaneously
+- Persists Discussion/Round/Message records for each open query
+- Updated HELP_TEXT with full Discussion section (commands for current and future plans)
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Create orchestrator module** - `81b5bff` (feat)
+2. **Task 2: Implement /open command handler** - `cef1898` (feat)
+3. **Task 3: Update help text** - `7f46170` (docs)
+
+**Plan metadata:** (pending)
+
+## Files Created/Modified
+
+- `src/moai/core/orchestrator.py` - SYSTEM_PROMPT constant and query_models_parallel() function
+- `src/moai/bot/handlers/discussion.py` - Added open_command handler with DB persistence
+- `src/moai/bot/handlers/__init__.py` - Registered /open CommandHandler
+- `src/moai/bot/handlers/commands.py` - Added Discussion section to HELP_TEXT
+
+## Decisions Made
+
+- Used asyncio.gather for parallel execution with individual try/except for per-model error handling
+- SYSTEM_PROMPT provides roundtable context with "Other participants: {models}" and "Topic: {project_name}"
+- Error responses returned as "[Error: {e}]" strings to keep response dict complete
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+
+None
+
+## Next Phase Readiness
+
+- /open command complete (M4 milestone - Open mode parallel)
+- Ready for 05-03-PLAN.md (discuss mode with sequential rounds)
+- orchestrator.py ready for discuss mode additions
+
+---
+*Phase: 05-multi-model-discussions*
+*Completed: 2026-01-16*