Add support for OpenAI's gpt-5.2-codex

[PeterDaveHello]

User description

Reference:

• https://openai.com/index/introducing-gpt-5-2-codex/
• https://platform.openai.com/docs/models/gpt-5.2-codex

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PR Type

Enhancement

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Description

• Add gpt-5.2-codex model with 400K token context window

• Mark gpt-5.2-codex as unsupported for temperature parameter

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Diagram Walkthrough

flowchart LR
  A["gpt-5.2-codex Model"] -- "400K context tokens" --> B["Model Configuration"]
  A -- "no temperature support" --> C["NO_SUPPORT_TEMPERATURE_MODELS"]

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File Walkthrough

	Relevant files
Enhancement	__init__.py Register gpt-5.2-codex model configuration                              pr_agent/algo/init.py Added gpt-5.2-codex entry to model context window mapping with 400K tokens Added gpt-5.2-codex to NO_SUPPORT_TEMPERATURE_MODELS list to disable temperature parameter support +2/-0

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[qodo-free-for-open-source-projects]

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🟢	No security concerns identified No security vulnerabilities detected by AI analysis. Human verification advised for critical code.
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🟢	Consistent Naming Conventions Objective: All new variables, functions, and classes must follow the project's established naming standards Status: Passed
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	Robust Error Handling Objective: Ensure potential errors and edge cases are anticipated and handled gracefully throughout the code Status: Passed
	Single Responsibility for Functions Objective: Each function should have a single, well-defined responsibility Status: Passed
	When relevant, utilize early return Objective: In a code snippet containing multiple logic conditions (such as 'if-else'), prefer an early return on edge cases than deep nesting Status: Passed

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[qodo-free-for-open-source-projects]

PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Impact
Possible issue	Verify model token limit is correct Verify the token limit for gpt-5.2-codex against official documentation, as it differs from another variant, gpt-5.2-chat-latest. pr_agent/algo/init.py [43] -'gpt-5.2-codex': 400000, # 400K, but may be limited by config.max_model_tokens +'gpt-5.2-codex': 400000, # 400K, but may be limited by config.max_model_tokens. TODO: Verify token limit from official documentation. Apply / Chat Suggestion importance[1-10]: 5 __ Why: The suggestion correctly points out a potential inconsistency in token limits among related models and reasonably asks for verification, which is a good practice for maintaining correctness.	Low
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• Author self-review: I have reviewed the PR code suggestions, and addressed the relevant ones.

[naorpeled]

LGTM!
Thanks for this 🙏