v4.2.0

Feature release: GPT 5.2 Codex support and prompt alignment with latest Codex CLI.

Added

• GPT 5.2 Codex model family: Full support for gpt-5.2-codex with presets:
  • gpt-5.2-codex-low - Fast GPT 5.2 Codex responses
  • gpt-5.2-codex-medium - Balanced GPT 5.2 Codex tasks
  • gpt-5.2-codex-high - Complex GPT 5.2 Codex reasoning & tools
  • gpt-5.2-codex-xhigh - Deep GPT 5.2 Codex long-horizon work
• New model family prompt: gpt-5.2-codex_prompt.md fetched from the latest Codex CLI release with its own cache file.
• Test coverage: Added unit tests for GPT 5.2 Codex normalization, family selection, and reasoning behavior.

Changed

• Prompt selection alignment: GPT 5.2 general now uses gpt_5_2_prompt.md (Codex CLI parity).
• Reasoning configuration: GPT 5.2 Codex supports xhigh but does not support "none"; "none" auto-upgrades to "low" and "minimal" normalizes to "low".
• Config presets: config/full-opencode.json now includes 22 pre-configured variants (adds GPT 5.2 Codex).
• Docs: Updated README/AGENTS/config docs to include GPT 5.2 Codex and new model family behavior.