As a PM, I never write specs or stories anymore. AI generates, I review/provide feedback, AI updates, then I handover to devs (human or agents) to implement. But the feedback loop is clunky: difficult to read raw markdown files, annotate, and iterate.

md-redline lets you open a markdown file, highlight rendered text, and leave inline comments. The comments are stored as HTML markers directly in the .md file. They're invisible in GitHub and VS Code preview but agents can read them with a plain file read.

The workflow: open a spec, leave feedback, copy the hand-off prompt, paste it into your agent. The agent edits the file, addresses the comments, and removes the markers. You review in diff view.

Runs locally. No account, no cloud, no database. The markdown file stays the source of truth.

npx md-redline /path/to/spec.md

https://github.com/dejuknow/md-redline