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Claude text generation ignores --settings launch args#25017

opened3d agobyTtheo

Claude text generation (thread titles, branch names, commit messages, PR descriptions) ignores the Claude instance's launch arguments, including --settings.

ClaudeTextGeneration builds its own argv and its own --settings JSON and never reads launchArgs (ClaudeTextGeneration.ts). After #22864, a per-instance --settings '{"env":{"ANTHROPIC_VERTEX_PROJECT_ID":"..."}}' applies to conversation turns, but text generation still uses the project from ~/.claude/settings.json. Reported in this comment on #15073.

Open questions for the fix:

  • Which launch args should text generation honor? --settings is the clear one. Most others (permission mode, system prompt) do not fit a one-shot JSON call.
  • Title generation runs in a temp directory, so a relative --settings path needs the thread cwd.
  • T3's own text-generation keys (disableAllHooks, thinking, fast mode) should still win on conflict, like the adapter.

Workaround: point the instance's binary path at a wrapper that merges your keys into T3's --settings value.

Filed by Claude Opus 5.5 on behalf of Theo.