Mark it once, get a compact summary
A familiar reaction can signal that a message deserves a summary, without adding another tracking step.
Trigger
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Action
Generate Chat Completion
Tool to generate a response given a list of messages in a conversational context. Supports both conversational Language Models (LLMs) and Vision-Language Models (VLMs). Compatible with OpenAI SDK.
Why this helps
Important messages are easy to mean to revisit and easy to forget among ongoing conversations.
- Use an existing reaction as a low-effort capture signal.
- Turn a long thread entry into something easier to scan.
- Create a consistent review point for messages worth keeping.
Setup
Build it in a few focused steps.
- 1Connect Slack and Hugging Face to Notis once in the portal.
- 2Create a named automation with a plain-language instruction in Notis.
- 3Ask Notis to summarize a message when the selected reaction is added, using Hugging Face.
- 4Choose Message Reaction Added as the trigger and choose where run reports should go.
- 5Test by adding the chosen reaction to one real message.
Questions about this workflow
Can a reaction filter the trigger?
The Slack reaction trigger supports optional channel and emoji filtering. Describe the intended reaction in the automation setup.
Does the summary replace the original message?
No. It creates a summary for review while leaving the source Slack message as context.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Slack to Hugging Face. A trigger fires from one place; an action lands in another.
Slack triggers
Hugging Face actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Change Discussion Status
Tool to change the status of a Hugging Face repository discussion. Use when you need to open or close discussions on models, datasets, or spaces.
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Check Dataset Validity
Tool to check whether a specific dataset is valid on Hugging Face Hub. Use when you need to determine what features (preview, viewer, search, filter, statistics) are available for a dataset.
New Channel Created Trigger
Triggered when a new channel is created in Slack.
Check Models Upload Method
Tool to check if files should be uploaded through the Large File mechanism or directly. Use when preparing to upload files to a Hugging Face model repository to determine the appropriate upload method for each file.
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
Check Spaces Upload Method
Tool to check if files should be uploaded through the Large File mechanism or directly to Hugging Face Spaces. Use when preparing to upload files to a Hugging Face Space repository to determine the appropriate upload method for each file.
Direct Message Received
Triggered when a new direct message (DM) is sent to a user in Slack. Catches all DMs across all DM channels.
Claim Paper Authorship
Tool to claim authorship of a paper on Hugging Face. Use when you need to associate yourself or another user with an ArXiv paper.
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Request Repository Access
Tool to request access to a gated repository on Hugging Face Hub. Use when you need to submit an access request for models, datasets, or Spaces that require approval. The fields required vary by repository.
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
Create Collection
Tool to create a new collection on Hugging Face. Use when you need to organize and curate models, datasets, spaces, papers, or other collections into a named collection.
Reaction Added Trigger
DEPRECATED: use `SLACK_MESSAGE_REACTION_ADDED` instead. Triggered when a reaction is added to a message in Slack.
Create Datasets Branch
Tool to create a new branch in a Hugging Face dataset repository. Use when you need to create a branch for versioning or experimentation with dataset changes.
Connect any two apps with Notis in the middle.
Slack and Hugging Face, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
Save your first hour today.
7-day trial of any paid plan, with 20$ of usage included.
No card. Works with personal or business Hugging Face.