Show HN: VSCode Inline Comments with MCP

A developer released an open-source VSCode extension that lets users and AI agents (via MCP) attach comments to highlighted text without modifying files. Comments are stored in a workspace JSON file, anchor to quoted text rather than line numbers, and update live in the editor. The tool supports CLI, MCP server, and editor UI, with features like stale detection and reflow re-anchoring.

Highlight text and attach comments to it — without modifying the file. Comments live in .comments.json at the workspace root. Agents Claude, via MCP and you via the editor or CLI write to the same store, and the editor updates live. Comments anchor to the text they quote , not to a line/character offset. Edit above a comment and it follows the prose. Rewrap a paragraph and it still resolves whitespace is normalized away . Reword the quoted text entirely and the comment degrades to ⚠ stale , pinned at its last known line — it is never silently dropped. In the editor: select text → ⌥C , or click the gutter + on any line. Reply, edit, resolve, and delete from the thread UI. From Claude: the MCP server exposes add comment , list comments , reply to comment , update comment , resolve comment , unresolve comment , delete comment . Claude's comments show up labelled Claude and appear in an open editor within ~1s. From a terminal: node dist/cli.mjs --workspace /path/to/project add \ --file Chapter2.tex --quote "the exact text" --body "your comment" node dist/cli.mjs --workspace /path/to/project list --all php src/anchor.ts quote - range resolution pure Node src/store.ts .comments.json read/write pure Node src/extension.ts Comments API, watcher, commands <- the only file importing 'vscode' src/mcp.ts MCP stdio server src/cli.ts CLI anchor.ts and store.ts must never import vscode — that module only exists inside the extension host, and the MCP server and CLI are plain Node processes. npm install npm run build or: npm run watch npm run typecheck npm run package - inline-comments-0.1.0.vsix | Setting | Default | | |---|---|---| inlineComments.file | .comments.json | Store path, relative to workspace root | inlineComments.author | OS username | Name recorded on comments you create | inlineComments.showResolved | false | Show resolved threads in the editor | Reflow re-anchoring collapses whitespace, but not line-comment markers. If you rewrap text that is itself commented out LaTeX % , // , , the rewrap inserts a marker mid-quote and the comment goes stale rather than re-anchoring. Rewrapping ordinary prose is unaffected.