Session listing is up to 560× faster, large stores resume in under a second, and GitHub-flavored Markdown now renders better throughout the terminal.

Breaking Changes

• libfx now uses LIBFX_MODEL_UNSUPPORTED_EFFORT and LIBFX_MODEL_UNSUPPORTED_FAST for unsupported model settings. Callers checking the old error codes must update.

New Features

• libfx accepts model: { id, effort, fast } and supports Blob or File images directly.
• Detached processes such as tmux, ssh-agent, and browser drivers now stay alive between shell calls.
• /mcp list now opens the interactive Servers menu.

Improvements

• In a 14,600-session benchmark, fx sessions dropped from 95 seconds to 0.17 seconds and fx --resume last from 33 seconds to 0.5 seconds.
• /new, /clear, and /reset now preserve the previous conversation in terminal scrollback.
• Oversized PNGs shrink before being sent without changing the original file. fx tells you when another image cannot be sent.
• Structured replies now use GitHub-flavored Markdown. Wide tables wrap inside their cells, and long URLs stay clickable.
• Steering stays intact through compaction and session recovery.
• MCP startup errors now explain whether the server exited, timed out, or returned invalid output.

Bug Fixes

• Prompt-too-long errors now trigger compaction and one retry.
• Numpad keys now work in the composer, including digits, operators, Enter, and navigation.
• Codex, Grok, and custom connections now start with --model or FX_MODEL even when no model is saved.
• /model now identifies models from custom connection settings without suggesting a Gateway sign-in.
• Clearing the terminal with Cmd+K or Ctrl+L no longer crashes conversations containing tool calls.
• tmux's session switcher and copy mode now stay open during terminal resizing.
• fx pr --create and fx issue --create now publish the final response instead of earlier progress text.
• Messages sent after interrupting a response now wait for the previous turn to close.
• Malformed tool arguments no longer break the next model request.

Security

• Slack MCP sign-in now requests only approved fx scopes and rejects unexpected OAuth resources or scope changes.
• Symlinked skills outside fx's usual directories can now be allowed through skill_symlink_authorities in profile settings. Project settings cannot grant that access.