docs(10.1-08): complete container action status code handling plan

.planning/STATE.md

@@ -4,9 +4,9 @@
 
 - **Milestone:** v1.2 -- Modularization & Polish
 - **Phase:** 10.1 of 13 (Aggressive Workflow Modularization)
-- **Plan:** 7 of 7 complete
+- **Plan:** 8 of 9 complete (UAT gap closure in progress)
-- **Status:** Phase 10.1 COMPLETE
+- **Status:** In progress
-- **Last activity:** 2026-02-08 -- Completed 10.1-07 documentation (Code classification + contracts)
+- **Last activity:** 2026-02-08 -- Completed 10.1-08 (Container action status code handling)
 
 ## Progress
 
@@ -17,7 +17,7 @@ v1.1: [**********] 100% SHIPPED
 v1.2: [*******___] 70%
 
 Phase 10:   Workflow Modularization         [**********] 100% COMPLETE (+ 10-07 UAT fixes)
-Phase 10.1: Aggressive Modularization       [**********] 100% COMPLETE (7/7 plans)
+Phase 10.1: Aggressive Modularization       [*********_] 89% (8/9 plans)
 Phase 10.2: Better Logging & Log Management [          ] Pending (INSERTED)
 Phase 11:   Update All & Callback Limits    [          ] Pending
 Phase 12:   Polish & Audit                  [          ] Pending
@@ -111,6 +111,8 @@ Phase 13:   Documentation Overhaul          [          ] Pending
 | 10.1-07 | No further Code node extraction viable | 2 candidates yield net-negative extraction (-50% efficiency) |
 | 10.1-07 | 168 nodes is near-minimal (structural minimum: 166) | Evidence-based analysis of all 168 nodes by category |
 | 10.1-07 | 115-125 target was unrealistic | Based on incomplete extraction overhead analysis |
+| 10.1-08 | Status code checks before message-based fallback | Explicit HTTP response handling before message parsing |
+| 10.1-08 | HTTP 304 treated as success | Docker API returns 304 for already-in-state, better UX than error |
 
 ## Phase 10.1 Progress
 
@@ -123,6 +125,8 @@ Phase 13:   Documentation Overhaul          [          ] Pending
 | 10.1-05 | Integration Verification | Complete |
 | 10.1-06 | Matching Sub-workflow Extraction | Complete |
 | 10.1-07 | Code Classification + Contract Documentation | Complete |
+| 10.1-08 | UAT Gap Closure: Container Action Status Codes | Complete |
+| 10.1-09 | UAT Gap Closure: Pending | Pending |
 
 **Node count progress:**
 - Start: 192 nodes
@@ -152,13 +156,13 @@ All 7 sub-workflows deployed and operational:
 
 ## Next Step
 
-Phase 10.1 complete. Proceed to Phase 10.2 (Better Logging & Log Management) or Phase 11 (Update All & Callback Limits).
+Complete Plan 10.1-09 (final UAT gap closure) to finish Phase 10.1. Then proceed to Phase 10.2 (Better Logging & Log Management) or Phase 11 (Update All & Callback Limits).
 
 ## Session Continuity
 
 Last session: 2026-02-08
-Stopped at: Completed Phase 10.1 (all 7 plans)
+Stopped at: Completed 10.1-08 (Container action status code handling)
-Resume file: None
+Resume file: .planning/phases/10.1-aggressive-workflow-modularization/10.1-09-PLAN.md
 
 ---
 *Auto-maintained by GSD workflow*

.planning/phases/10.1-aggressive-workflow-modularization/10.1-08-SUMMARY.md

@@ -0,0 +1,122 @@
+---
+phase: 10.1-aggressive-workflow-modularization
+plan: 08
+subsystem: workflows
+tags: [n8n, docker-api, error-handling, status-codes]
+
+# Dependency graph
+requires:
+  - phase: 10.1-01
+    provides: "Container Actions sub-workflow (n8n-actions.json)"
+provides:
+  - "HTTP status code detection in container action formatters (304, 404, 500+)"
+  - "User-friendly messages for already-stopped/started containers"
+  - "Clear error messages for not-found and server errors"
+affects: [UAT-gap-closure, Phase-11-updates]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns: ["HTTP status code handling before message-based fallback", "Docker API 304 = already in desired state"]
+
+key-files:
+  created: []
+  modified: ["n8n-actions.json"]
+
+key-decisions:
+  - "Status code checks run before existing message-based checks (fail-fast pattern)"
+  - "HTTP 304 treated as success with helpful 'already {state}' message"
+
+patterns-established:
+  - "Docker API status code interpretation: 304=already-in-state, 404=not-found, 500+=server-error, 204=success"
+  - "onError:continueRegularOutput allows Format nodes to inspect statusCode field"
+
+# Metrics
+duration: 1min 34sec
+completed: 2026-02-08
+---
+
+# Phase 10.1 Plan 08: Container Action Status Code Handling Summary
+
+**Docker API HTTP status code detection (304, 404, 500+) added to Stop/Start/Restart result formatters, providing clear user feedback for edge cases**
+
+## Performance
+
+- **Duration:** 1 min 34 sec
+- **Started:** 2026-02-08T14:53:11Z
+- **Completed:** 2026-02-08T14:54:45Z
+- **Tasks:** 2
+- **Files modified:** 1
+
+## Accomplishments
+- Added statusCode handling to all three Format Result nodes (Stop, Start, Restart)
+- HTTP 304 now returns success with "already stopped/started" message instead of failure
+- HTTP 404 returns clear "Container not found" error message
+- HTTP 500+ returns descriptive "Server error {action}" message
+- Deployed updated sub-workflow to n8n instance successfully
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Add statusCode checks to Format Stop/Start/Restart Result nodes** - `684feb1` (feat)
+2. **Task 2: Deploy updated sub-workflow via n8n API** - *(API operation, no file changes)*
+
+## Files Created/Modified
+- `n8n-actions.json` - Added HTTP status code handling to Format Stop/Start/Restart Result Code nodes
+
+## Decisions Made
+
+**Status code checks before message-based fallback:** Implemented statusCode checks first, then fall through to existing message/error field checks. This ensures Docker API HTTP responses are handled explicitly before relying on message parsing.
+
+**HTTP 304 as success:** Docker API returns 304 when container is already in desired state (e.g., stopping an already-stopped container). Treating this as `success: true` with helpful message instead of error provides better UX.
+
+**Per-action messaging:** Each formatter uses action-appropriate text:
+- Stop: "already stopped"
+- Start: "already started"
+- Restart: "already started" (Docker restart endpoint returns 304 for running containers)
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+
+None - implementation was straightforward.
+
+## User Setup Required
+
+None - no external service configuration required.
+
+## Next Phase Readiness
+
+UAT gap "Stopping an already-stopped container shows failure message" is now closed. The fix is deployed and ready for UAT verification.
+
+All gap closure plans (08-09) will be complete after Plan 09 execution.
+
+## Self-Check: PASSED
+
+**Created files verification:**
+- SUMMARY.md: Created in this execution
+
+**Modified files verification:**
+```
+[ -f "/home/luc/Projects/unraid-docker-manager/n8n-actions.json" ] && echo "FOUND: n8n-actions.json" || echo "MISSING: n8n-actions.json"
+FOUND: n8n-actions.json
+```
+
+**Commits verification:**
+```
+git log --oneline | head -5
+684feb1 feat(10.1-08): add statusCode handling to container action result formatters
+0fc429f docs(10.1): create UAT gap closure plans (08-09)
+a1705e0 test(10.1): diagnose 4 UAT issues with root causes
+e369fe5 test(10.1): complete UAT - 11 passed, 4 issues
+b8ae532 docs(10.1): mark Phase 10.1 complete in roadmap (7/7 plans)
+```
+
+All commits present. All files exist.
+
+---
+*Phase: 10.1-aggressive-workflow-modularization*
+*Completed: 2026-02-08*