v0.29.0

Added

• Document variants. When repurposing a doc into another format — a thread off a blog post, a LinkedIn cut of a newsletter — create_document({ masterDocId, variantType }) nests the new doc under its master in the sidebar instead of floating off as a disconnected doc. Both entry points are wired: agents pass the params on create_document; users do the same via right-click → "Create variant".
• Prompt Debug Inspector (owner-only, off by default). Set OW_PROMPT_DEBUG=1 on the openwriter MCP server env and every right-click Enhance drops a _prompt-*.md doc — the exact system + user Author's Voice prompt that was sent — into the sidebar.