Daily Google Tasks briefing in Slack with Ollama-powered summaries

Tasks Briefing

This template posts a clean, Slack-ready morning summary of your Google Tasks due today. It fetches tasks, filters only those due “today” in your timezone, asks a local LLM (via LangChain + Ollama) to produce a short summary (no steps, just a concise brief), strips any hidden <think> blocks, and delivers the message to your chosen Slack channel.

How it works

1. Trigger at Morning (Cron) – runs at 7:00 AM (you can change the hour) to kick things off daily.

2. Get many tasks (Google Tasks node) – pulls tasks from your selected Google Tasklist.

3. Code (Filter Due Today) – normalizes dates to your timezone, keeps only tasks due today, and emits a fallback flag if none exist.

4. If – routes:

   • True (has tasks) → continues to the LLM summary path.
   • False (no tasks) → sends a “No tasks due today” message to Slack.

5. Code (Build LLM Prompt) – builds a compact, Markdown-only prompt for the model (no tool calls).

6. Basic LLM Chain (LangChain) + Ollama Model – generates a short summary for Slack.

7. Code (Cleanup) – removes any <think>…</think> content if the model includes it.

8. Send a message (Slack) – posts the final brief to your Slack channel.

Required credentials

• Google Tasks OAuth2 API – to read tasks from your Google Tasklist.
• Slack API – to post the summary into a channel.
• Ollama – local model endpoint (e.g., qwen3:4b); used by the LangChain LLM nodes.

Setup Instructions

1. Google Tasks credential

   • In Google Cloud Console: enable Google Tasks API, create an OAuth Client (Web), and set the redirect URI shown by n8n.

   • In n8n Credentials, add Google Tasks OAuth2 API with scope:

     • https://www.googleapis.com/auth/tasks (read/write) or
     • https://www.googleapis.com/auth/tasks.readonly (read-only).

   • In the Get many tasks node, select your credential and your Tasklist.

2. Slack credential & channel

   • In n8n Credentials, add Slack API (bot/user token with chat:write).
   • In Send a message nodes, select your Slack credential and set the Channel (e.g., #new-leads).

3. Ollama model (LangChain)

   • Ensure Ollama is running on your host (default http://localhost:11434).
   • Pull a model (e.g., ollama pull qwen3:4b) or use another supported model (llama3:8b, etc.).
   • In Ollama Model node, select your Ollama credential and set the model name to match what you pulled.

4. Timezone & schedule

   • The Cron node is set to 7:00 AM. Adjust as needed.
   • The Code (Filter Due Today) node is configured for Asia/Dhaka; change the TZ constant if you prefer a different timezone.

5. (Optional) Cleanup safety

   • The template includes a Code (Cleanup) node that strips <think>…</think> blocks from model output. Keep this connected before the Slack node.

6. Test the flow

   • Run the workflow once manually:

     • If you have tasks due today, you should see a concise summary posted to your Slack channel.
     • If none are due, you’ll receive a friendly “No tasks due today” message.

7. Activate

   • When everything looks good, toggle the workflow Active to receive the daily summary automatically.