docs(03-04): complete container update plan

Tasks completed: 3/3 - Update command routing and container matching - Image pull and change detection - Container recreation workflow SUMMARY: .planning/phases/03-container-actions/03-04-SUMMARY.md Phase 3 complete - all container actions implemented
2026-01-30 13:27:43 -05:00
parent 04321c1c9a
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+---
+phase: 03-container-actions
+plan: 04
+subsystem: api
+tags: [docker-api, container-update, telegram, n8n, image-pull, container-recreation]
+
+# Dependency graph
+requires:
+  - phase: 03-01-basic-actions
+    provides: Container lifecycle API patterns, fuzzy matching, action routing structure
+provides:
+  - Container update command (pull new image + recreate)
+  - Image digest comparison for change detection
+  - Silent no-update behavior
+  - Container config preservation during recreation
+affects: [04-logs, 05-polish]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns:
+    - "Image pull via POST /images/create?fromImage=X"
+    - "Image digest comparison for update detection"
+    - "Container config extraction from inspect endpoint"
+    - "NetworkingConfig preservation from NetworkSettings"
+
+key-files:
+  created: []
+  modified:
+    - n8n-workflow.json
+
+key-decisions:
+  - "Silent when no update available - only notify on actual image change"
+  - "Single container match only for update - no batch updates"
+  - "Version detection from OCI labels with ID fallback"
+  - "Preserve Hostname/Domainname removal during container recreation"
+
+patterns-established:
+  - "Multi-step container operations: inspect -> modify -> recreate"
+  - "Image version extraction from org.opencontainers.image.version or version labels"
+  - "Sequential container lifecycle: stop -> remove -> create -> start"
+
+# Metrics
+duration: 8min
+completed: 2026-01-30
+---
+
+# Phase 03 Plan 04: Container Update Action Summary
+
+**Container update workflow with image pull, digest comparison, and config-preserving recreation with version change reporting**
+
+## Performance
+
+- **Duration:** 8 min
+- **Started:** 2026-01-30T18:24:33Z
+- **Completed:** 2026-01-30T18:33:00Z
+- **Tasks:** 3
+- **Files modified:** 1
+
+## Accomplishments
+- Update command routing with single-match-only requirement
+- Image pull and digest comparison for detecting actual updates
+- Container recreation preserving all configuration (Config, HostConfig, Networks)
+- Version change display from image labels or ID substring
+- Silent behavior when image already up-to-date
+
+## Task Commits
+
+All three tasks were implemented together (continuation of interrupted session):
+
+1. **Tasks 1-3: Complete update workflow** - `04321c1` (feat)
+   - Update command routing and container matching
+   - Image pull and change detection
+   - Container recreation workflow
+
+## Files Created/Modified
+- `n8n-workflow.json` - Extended with 29 new nodes for update flow:
+  - Parse Update Command, Docker List for Update, Match Update Container
+  - Check Update Match Count, Handle Update Multiple, Send Update Error/No Match/Multiple
+  - Build Inspect Command, Inspect Container, Parse Container Config
+  - Build Pull Command, Pull Image, Build Image Inspect, Inspect New Image
+  - Compare Digests, Check If Update Needed
+  - Build Stop Command, Stop Container, Verify Stop Build Remove
+  - Remove Container, Build Create Body, Build Create Command
+  - Create Container, Parse Create Response
+  - Build Start Command, Start New Container
+  - Format Update Result, Send Update Result
+
+## Decisions Made
+- **Silent on no-update:** When image digest hasn't changed, send no message (per CONTEXT.md)
+- **Single match only:** Update command requires exact container name; multiple matches show disambiguation message
+- **Version detection hierarchy:** Check org.opencontainers.image.version label, then version label, then use image ID substring
+- **NetworkingConfig preservation:** Extract from NetworkSettings.Networks with IPAMConfig, Links, and Aliases
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+- Session was interrupted during initial execution (rate limit)
+- Nodes were created but connections were missing
+- Connections were added to complete the workflow wiring
+- All work committed as single comprehensive commit
+
+## User Setup Required
+None - no external service configuration required.
+
+## Next Phase Readiness
+- All container actions complete (start, stop, restart, update)
+- Phase 03 fully complete
+- Ready for Phase 04: Logs & Intelligence
+
+---
+*Phase: 03-container-actions*
+*Completed: 2026-01-30*