Week of August 4, 2026

Updates

GPT-5 reasoning effort matches model version — Reasoning effort tiers (including none and xhigh) are now offered only for the GPT-5 variants that support them, so --variant no longer surfaces options a given model would reject. See Controlling reasoning effort.
Diff annotation polish — The session UI diff view tightens up comment indicators, gutter behavior, and light/dark syntax colors for better readability.

Toggle file selections off — Clicking a file selection a second time now clears it, so you can undo a selection without picking a different one first.
Cleaner draft comment interactions — Starting or dismissing a draft comment now clears the underlying selection consistently and no longer competes with hover state.
Animated reasoning header restored — The reasoning header in the TUI shows an animated spinner again while thinking, and its gradient dims when expanded so the collapsed and open states are easier to tell apart.
Background process and test tools restored — bash_background, process_output, list_processes, kill_process, and test_run are available to agents again after being dropped in an earlier merge. Agents can start long-running commands like dev servers and watchers, read their output, and run the project’s tests with structured pass/fail results. See Built-in tools.