teknium1 a82ce60294 fix: add missing Responses API parameters for Codex provider ...

Adds tool_choice, parallel_tool_calls, and prompt_cache_key to the
Codex Responses API request kwargs — matching what the official Codex
CLI sends.

- tool_choice: 'auto' — enables the model to proactively call tools.
  Without this, the model may default to not using tools, which explains
  reports of the agent claiming it lacks shell access (#747).
- parallel_tool_calls: True — allows the model to issue multiple tool
  calls in a single turn for efficiency.
- prompt_cache_key: session_id — enables server-side prompt caching
  across turns in the same session, reducing latency and cost.

Refs #747

2026-03-11 04:28:31 -07:00

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