Convert key Slack channel updates into summary PDFs
Capture decisions and next steps before they disappear in the chat stream.
Trigger
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
Action
Convert HTML to PDF
Tool to convert HTML to a PDF document. Use when you need to generate a PDF from raw HTML. Returns raw PDF bytes suitable for download or storage.
Why this helps
Busy channels move quickly, making it hard to retain decisions and commitments.
- Preserves decisions in a portable format
- Highlights owners and follow-ups
- Makes async review easier
Setup
Build it in a few focused steps.
- 1Connect Slackbot and Customjs in Notis.
- 2Create an automation called Channel Update Summary.
- 3In one instruction, ask Notis to summarize each channel message into decisions, risks, and actions, then create a PDF.
- 4Choose Channel Message Received as the trigger and select a report channel.
- 5Send one real message to verify the output.
Questions about this workflow
Does it process direct messages?
No. This workflow uses the channel message event, which excludes direct messages.
Can it summarize only messages with enough context?
Yes. Tell Notis to skip messages that do not contain a meaningful update.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Slackbot to Customjs. A trigger fires from one place; an action lands in another.
Slackbot triggers
Customjs actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Authenticate CustomJS API Key
Tool to authenticate a CustomJS API key. Use when verifying a user's API key before making further requests.
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Convert HTML to PDF
Tool to convert HTML to a PDF document. Use when you need to generate a PDF from raw HTML. Returns raw PDF bytes suitable for download or storage.
New Channel Created Trigger
Triggered when a new channel is created in Slack.
Convert HTML to PNG
Tool to convert HTML string to PNG image. Use when you need a PNG from HTML after preparing your markup.
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
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Direct Message Received
Triggered when a new direct message (DM) is sent to a user in Slack. Catches all DMs across all DM channels.
Merge multiple PDFs into one
Tool to merge multiple PDF files into a single PDF. Use when you have multiple PDF URLs and want one combined PDF.
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Run Puppeteer Script
Tool to run a Puppeteer script and capture a screenshot. Use when automating headless browser tasks and needing a PNG output. Use after confirming the script logic.
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
Reaction Added Trigger
DEPRECATED: use `SLACK_MESSAGE_REACTION_ADDED` instead. Triggered when a reaction is added to a message in Slack.
Connect any two apps with Notis in the middle.
Slackbot and Customjs, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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