v0.9.51

Fixed

• Reasoning off really is off on Claude 5 models. Sonnet 5 kept
  thinking with effort off because the request left thinking out, and
  Claude 5 models think by default. Off now follows what Anthropic's
  /v1/models says each model accepts (disabled, between_tools on
  Sonnet 5.5), with rules matching Anthropic's per-model table as the
  fallback. A rejected thinking mode is retried and remembered. Models that
  always think (Opus 5.5, Fable, Mythos) no longer offer off at all. Smart
  Mode's routed off is sent explicitly too.
• Switching providers keeps the right model. The saved model per
  provider was looked up under the name you typed (codex) but saved under
  the canonical one (openai), so switching back fell to the default. A
  local server (Ollama, LM Studio) that doesn't have the saved model now
  picks one it has and says so.
• Effort survives switching models. It used to be rewritten on every
  switch, so off became low on a model that always thinks and stayed low
  after switching back.
• agentty run -m no longer changes the TUI's saved model, and neither
  does a headless --provider.

Changed

• The tool output pane (^O) is readable and searchable. It uses the
  terminal's height and never runs past it, wraps long lines and the full
  command instead of cutting them off, and shows the output as you'd want
  to read it: no description echo, ``` fences or notes meant for the model,
  in normal text with tokens coloured. A cut is shown as a ⋯ line. `/`
  finds as you type, `n`/`N` step through matches, PgUp/PgDn page, and `y`
  copies the clean text. The list never cuts off a row's status.
• The diff review panel was redone. It says up front that the edits
  are saved and you keep or undo each one, shows files as tabs, lists each
  change with real old and new line numbers, and counts kept and undone.
• Tool output reads in the normal text colour with paths, numbers, strings
  and flags coloured, instead of a dull grey. Cards drop notes the tool
  wrote for the model, read opens at the top of the file, and git status shows just the changed files.
• The status bar shows the whole thread title when there's room.

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Full history: CHANGELOG.md