message

# Message Drafts Bun-based preview server. Fragments are written in Markdown - the build script converts to platform-specific HTML. The plugin's PostToolUse hook (`hooks/auto-serve-fragment.ts`, registered in this file's frontmatter on the `Write|Edit|MultiEdit` matcher) auto-builds, starts the preview server, and opens the browser whenever a `.fragment.md` is written or edited. ## Flow 1. Write the `.fragment.md` directly to `data/writing/email_drafts/` in ONE Write tool call. **Do NOT write the email body inline in your response before the Write call.** Compose the draft mentally and write it straight to the file - the preview server renders it. 2. After the Write tool returns, read the URL the hook wrote: ```bash cat "${CLAUDE_PROJECT_DIR}/.claude/.message-preview-url" 2>/dev/null ``` 3. Reply with only the preview URL and a one-line summary: `Draft ready: email to Sam re invoice follow-up → http://127.0.0.1:XXXX` **The hook has already started the server and opened the browser by the time the Write tool returns.** Do NOT run `bun run serve.ts` yourself. Do NOT call `open <url>`. Do NOT launch a second server. The browser is already open. **Always relay the preview URL to the user.** Read it from `.claude/.message-preview-url`. If that file is empty or missing, the hook did not start a server - run the manual **Fallback** below rather than guessing at a URL. **On revision** ("make it shorter", "change the tone"): use Read to load the fragment, Edit ...