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

phase, plan, subsystem, tags, requires, provides, affects, tech-stack, key-files, key-decisions, patterns-established, duration, completed

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	duration	completed
10.1-aggressive-workflow-modularization	08	workflows	n8n docker-api error-handling status-codes	phase provides 10.1-01 Container Actions sub-workflow (n8n-actions.json)	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	UAT-gap-closure Phase-11-updates	added patterns HTTP status code handling before message-based fallback Docker API 304 = already in desired state	created modified n8n-actions.json	Status code checks run before existing message-based checks (fail-fast pattern) HTTP 304 treated as success with helpful 'already {state}' message	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	1min 34sec	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.

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Phase: 10.1-aggressive-workflow-modularization Completed: 2026-02-08