diffdown.com
Diffdown is a real-time collaborative Markdown editor/previewer built on the AT Protocol
diffdown.com
1# Diffdown
2
3Collaborative Markdown editor with real-time preview, version history, and multi-file repository support.
4
5## Running locally
6
7```bash
8# Set env vars (or use defaults for dev)
9export DIFFDOWN_SESSION_SECRET="your-secret-here"
10export BASE_URL="http://127.0.0.1:8080"
11
12# Build and run
13go build -o diffdown ./cmd/server
14./diffdown
15```
16
17Server starts on `:8080`.
18
19## Note on CodeMirror
20
21The editor template references CodeMirror 6 modules at `/static/vendor/codemirror.js` and `/static/vendor/codemirror-lang-markdown.js`. You'll need to bundle these yourself (or use a CDN). A quick way:
22
23```bash
24npm init -y
25npm install @codemirror/state @codemirror/view @codemirror/lang-markdown codemirror
26npx esbuild --bundle --format=esm --outfile=static/vendor/codemirror.js node_modules/codemirror/dist/index.js
27npx esbuild --bundle --format=esm --outfile=static/vendor/codemirror-lang-markdown.js node_modules/@codemirror/lang-markdown/dist/index.js
28```