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SKILL.md

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+---
+name: n8n-workflow-automation
+description: "设计并输出n8n工作流JSON，具有强大的触发器、幂等性、错误处理。"
+---
+
+# n8n workflow automation with retries, logging, and review queues
+
+## PURPOSE
+Designs and outputs n8n workflow JSON with robust triggers, idempotency, error handling, logging, retries, and human-in-the-loop review queues.
+
+## WHEN TO USE
+- TRIGGERS:
+  - Build an n8n workflow that runs every Monday and emails the compliance summary.
+  - Add error handling and retries to this workflow, plus a review queue for failures.
+  - Create a webhook workflow that logs every run and writes a status row to a tracker.
+  - Make this n8n flow idempotent so it does not duplicate records when it reruns.
+  - Instrument this workflow with audit logs and a human approval step.
+- DO NOT USE WHEN…
+  - You need code-only automation without n8n (use a scripting/CI skill).
+  - You need to bypass security controls or hide audit trails.
+  - You need to purchase or recommend prohibited items/services.
+
+## INPUTS
+- REQUIRED:
+  - Workflow intent: trigger type + schedule/timezone + success criteria.
+  - Targets: where to write results (email/Drive/Sheet/DB) and required fields.
+- OPTIONAL:
+  - Existing n8n workflow JSON to modify.
+  - Sample payloads / example records.
+  - Definition of dedup keys (what makes a record unique).
+- EXAMPLES:
+  - Cron: Monday 08:00 Europe/London; send summary email + Drive upload
+  - Webhook: receive JSON; route to folders
+
+## OUTPUTS
+- Default (read-only): a workflow design spec (nodes, data contracts, failure modes).
+- If explicitly requested: `workflow.json` (n8n importable JSON) + `runbook.md` (from template).
+Success = workflow is idempotent, logs every run, retries safely, and routes failures to a review queue.
+
+
+## WORKFLOW
+1. Clarify trigger:
+   - Cron/webhook/manual; schedule/timezone; concurrency expectations.
+2. Define data contract:
+   - input schema, required fields, and validation rules.
+3. Design idempotency:
+   - choose dedup key(s) and storage (DB/Sheet) to prevent duplicates on retries.
+4. Add observability:
+   - generate `run_id`, log start/end, store status row and error details.
+5. Implement error handling:
+   - per-node error branches, retry with backoff, and final failure notification.
+6. Add human-in-the-loop (HITL) review queue:
+   - write failed items to a queue (Sheet/DB) and require approval to reprocess.
+7. “No silent failure” gates:
+   - if counts/thresholds fail, stop workflow and alert.
+8. Output:
+   - If asked for JSON: produce importable n8n workflow JSON + runbook.
+9. STOP AND ASK THE USER if:
+   - destination systems are unknown,
+   - no dedup key exists,
+   - credential strategy (env vars) is not specified,
+   - the workflow needs privileged access not yet approved.
+
+
+## OUTPUT FORMAT
+If outputting **n8n workflow JSON**, conform to:
+
+```json
+{
+  "name": "<workflow name>",
+  "nodes": [ { "name": "Trigger", "type": "n8n-nodes-base.cron", "parameters": {}, "position": [0,0] } ],
+  "connections": {},
+  "settings": {},
+  "active": false
+}
+```
+
+Also output `runbook.md` using `assets/runbook-template.md`.
+
+
+## SAFETY & EDGE CASES
+- Read-only by default; only emit workflow JSON when explicitly requested.
+- Do not include secrets in JSON; reference env vars/credential names only.
+- Include audit logging + failure notifications; avoid workflows that can silently drop data.
+- Prefer least privilege: call only required APIs and minimize scopes.
+
+
+## EXAMPLES
+- Input: “Cron every Monday, email compliance summary, retry failures.”  
+  Output: Node map + `workflow.json` with Cron → Fetch → Aggregate → Email, plus error branches to review queue.
+
+- Input: “Webhook that logs runs and writes status row.”  
+  Output: Webhook → Validate → Process → Append status row; on error → log + notify + queue.
+

_meta.json

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+{
+  "ownerId": "kn7crzxy2455jgg7b1swy21gtn7zd7c2",
+  "slug": "n8n-workflow-automation",
+  "version": "1.0.0",
+  "publishedAt": 1768664321187
+}

assets/runbook-template.md

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+# n8n Workflow Runbook Template
+
+## Purpose
+- What the workflow does and why it exists.
+
+## Triggers
+- Cron / Webhook / Manual
+- Schedule, timezone, and expected frequency.
+
+## Inputs
+- Source systems and credentials (reference env vars only).
+
+## Outputs
+- Where results go (email, Google Sheet/Drive, database), including file naming.
+
+## Idempotency
+- Dedup key:
+- Safe re-run behavior:
+
+## Error handling
+- Retry policy:
+- Failure notifications:
+- Review queue link/location:
+
+## Logging & audit
+- Run ID:
+- What is logged per run:
+- Where logs are stored:
+
+## Operational checks
+- Expected counts/thresholds:
+- “Stop the line” conditions: