Mistral Vibe v2.25.3

Added

• New /branch command forks the current conversation into a new resumable session, leaving the current session unchanged. Resume the copy in another terminal with vibe --resume <id>.

Changed

• Bump the local harness runtime to v0.4.5.
• Make @ file mentions use Git-aware discovery and accept standalone pasted files and folders.

Fixed

• Retained chats remain readable and restore their worktrees when work resumes.
• New session logs are no longer readable by other users on POSIX systems.
• AGENTS.md instructions now load into the system prompt under the experimental unified harness.