Simple Bluesky multi-image post using native Bluesky API
## Who is this workflow for?
This workflow is the baseline workflow for anyone who needs to automate the process of posting 1-4 images to Bluesky using the Bluesky API. It is ideal for anyone looking to streamline their social media posting process, saving time and ensuring consistent content delivery.
## Use Case / Problem Solved
Manually posting images and captions on Instagram can be time-consuming, especially for businesses and content creators managing multiple accounts. This workflow automates the process from image preparation to publishing, reducing manual effort and increasing efficiency.
## What this workflow does
1. Trigger Initialization: The workflow starts with a manual trigger that can be adapted to other triggers (e.g., HTTP webhook or schedule).
2. Set Parameters: The workflow includes a node that sets essential parameters, such as the Bluesky account ID, image URLs, and caption.
3. Prepare Bluesky Session: A node creates the authenticated session data used by the upload and post operations later in the workflow.
4. Publish Media: Nodes retrieve image files from the specified URLS and uploads them as blobs to Bluesky, a necessary pre-requisite for a Bluesky post to have images attached.
5. Post text caption + images: A node does the final call to the Bluesky API, including the text caption and relevant image references.
## Setup
1. Sign-in to Bluesky and create an [App Password](https://bsky.app/settings/app-passwords)
2. Add your username and App Password to the *Define Credentials* node.
3. Set the caption (text content) of your post in the *Set Caption* node.
4. Set 1-4 image URLs in the *Set Images* node
5. Adapt the initial trigger as needed to fit your workflow's requirements (e.g., schedule, webhook).
6. Adapt the caption and images nodes to accept dynamic parameters.
## Limitations
This workflow assumes a minimum of 1 image URL to function. If you want a text-only post, remove the whole `embed` section from the JSON in last *Post to Bluesky* node, as well as relevant image attachment nodes.
The 300-character limit in Bluesky includes the caption + hashtags + image alt text. Going over 300 will return a `Record/description must not be longer than 300 graphemes` error.
