docs(01-01): complete telegram echo bot plan

Tasks completed: 2/2 - Task 1: Create Telegram Bot and Configure n8n (human action) - Task 2: Create n8n Workflow for Telegram Echo SUMMARY: .planning/phases/01-foundation/01-01-SUMMARY.md
2026-01-28 19:48:46 -05:00
parent 9d503bb9a8
commit 216a73e0d0
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+---
+phase: 01-foundation
+plan: 01
+subsystem: messaging
+tags: [n8n, telegram, webhook, bot, auth]
+
+# Dependency graph
+requires: []
+provides:
+  - n8n workflow JSON for Telegram echo bot
+  - User authentication via environment variable
+  - Message round-trip foundation (Telegram -> n8n -> Telegram)
+affects: [02-docker-integration, 03-container-actions]
+
+# Tech tracking
+tech-stack:
+  added: [n8n-nodes-base.telegramTrigger, n8n-nodes-base.if, n8n-nodes-base.code, n8n-nodes-base.telegram]
+  patterns: [env-var-auth, silent-ignore-unauthorized]
+
+key-files:
+  created: [n8n-workflow.json]
+  modified: []
+
+key-decisions:
+  - "Environment variable auth ($env.TELEGRAM_USER_ID) instead of hardcoded"
+  - "Silent ignore on false branch (no unauthorized response)"
+  - "HTML parse mode for future formatting flexibility"
+
+patterns-established:
+  - "Auth pattern: IF node checks user ID from environment variable"
+  - "Echo pattern: Code node formats message with timestamp before sending"
+
+# Metrics
+duration: 5min
+completed: 2026-01-28
+---
+
+# Phase 1 Plan 1: Telegram Echo Bot Summary
+
+**n8n workflow with Telegram trigger, user ID authentication via environment variable, and echo response with timestamp**
+
+## Performance
+
+- **Duration:** 5 min
+- **Started:** 2026-01-28
+- **Completed:** 2026-01-28
+- **Tasks:** 2 (1 human-action, 1 auto)
+- **Files modified:** 1
+
+## Accomplishments
+- Telegram bot created and configured in n8n (user action)
+- n8n workflow JSON created with 4 nodes: Trigger, IF, Code, Send
+- User authentication via $env.TELEGRAM_USER_ID environment variable
+- Silent ignore for unauthorized users (no false branch nodes)
+- Echo response includes original text and ISO timestamp
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Create Telegram Bot and Configure n8n** - (human action, no commit)
+2. **Task 2: Create n8n Workflow for Telegram Echo** - `9d503bb` (feat)
+
+## Files Created/Modified
+- `n8n-workflow.json` - Complete n8n workflow definition for import
+
+## Decisions Made
+- Used environment variable ($env.TELEGRAM_USER_ID) for auth - keeps sensitive data out of workflow JSON
+- HTML parse mode enabled for future formatting (bold, italic, links)
+- Silent ignore (empty false branch) for unauthorized users - no information leak
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+
+None - workflow JSON created and validated successfully.
+
+## User Setup Required
+
+User completed setup during Task 1:
+- Created Telegram bot via @BotFather
+- Configured TELEGRAM_BOT_TOKEN and TELEGRAM_USER_ID as n8n container environment variables
+- Created Telegram API credential in n8n
+
+## Next Phase Readiness
+- Workflow JSON ready for import into n8n
+- User must import workflow and activate it to test echo functionality
+- Foundation ready for Docker integration (Phase 2)
+
+---
+*Phase: 01-foundation*
+*Completed: 2026-01-28*