---
phase: 03-container-actions
plan: 01
subsystem: api
tags: [docker-api, telegram, n8n, container-lifecycle, fuzzy-matching]

# Dependency graph
requires:
  - phase: 02-docker-integration
    provides: Docker socket access, container list API, fuzzy matching logic
provides:
  - Container start/stop/restart via Telegram commands
  - Action command routing in n8n workflow
  - Single-match immediate execution flow
  - Multiple-match placeholder for confirmation (Plan 03-02)
affects: [03-02-confirmation-flow, 04-logs]

# Tech tracking
tech-stack:
  added: []
  patterns:
    - "Docker API POST calls with curl -X POST"
    - "HTTP status code extraction with curl -w '%{http_code}'"
    - "Graceful shutdown timeout with ?t=10 parameter"
    - "Switch node routing by match count"

key-files:
  created: []
  modified:
    - n8n-workflow.json

key-decisions:
  - "Treat HTTP 304 (already in state) as success"
  - "Use 10-second graceful timeout for stop/restart"
  - "Route by match count: 0, 1, >1, error"

patterns-established:
  - "Action command pattern: start/stop/restart <name>"
  - "Build curl command in Code node, execute in Execute Command node"
  - "Parse HTTP status in separate Code node for error handling"

# Metrics
duration: 12min
completed: 2026-01-30
---

# Phase 03 Plan 01: Basic Container Actions Summary

**Single-match container actions (start/stop/restart) execute immediately via Docker API POST calls with graceful timeout**

## Performance

- **Duration:** 12 min
- **Started:** 2026-01-30T10:00:00Z
- **Completed:** 2026-01-30T10:12:00Z
- **Tasks:** 3
- **Files modified:** 1

## Accomplishments
- Action command routing for start/stop/restart patterns
- Fuzzy container matching with case-insensitive substring search
- Docker API POST calls for container lifecycle actions
- HTTP status code handling (204 success, 304 already-in-state, error codes)
- Error handling for Docker connection failures and action errors

## Task Commits

Each task was committed atomically:

1. **Task 1: Add action command routing to workflow** - `4848e7d` (feat)
2. **Task 2: Implement container matching and action execution** - `f466a29` (feat)
3. **Task 3: Handle action errors gracefully** - `2bd90c8` (feat)

## Files Created/Modified
- `n8n-workflow.json` - Extended with action branch: Parse Action, Docker List for Action, Match Container, Check Match Count, Build Action Command, Execute Action, Parse Action Result, Send Action Result, error handlers

## Decisions Made
- Treat HTTP 304 (container already in desired state) as success - user doesn't need to know it was already stopped/started
- Use 10-second timeout (?t=10) for stop/restart to allow graceful shutdown
- Route by matchCount with explicit error check (matchCount < 0) for Docker connection failures
- Multiple match placeholder returns message indicating confirmation will come in next update

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered
None

## User Setup Required
None - no external service configuration required.

## Next Phase Readiness
- Single-match actions fully functional
- Ready for Plan 03-02: Confirmation flow for multiple matches
- Inline keyboard buttons will use HTTP Request node (not native Telegram node) per RESEARCH.md

---
*Phase: 03-container-actions*
*Completed: 2026-01-30*