feat: support 1M-token context for Claude Sonnet 4; raise defaults to 1,000,000

[jacsamell]

PR Type

Enhancement

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Description

• Updated Claude Sonnet 4 context limit to 1M tokens
• Raised default max_model_tokens configuration to 1,000,000
• Updated documentation examples and GitHub Action defaults
• Enhanced model capabilities for processing larger contexts

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Changes walkthrough 📝

	Relevant files
Enhancement	__init__.py Update Claude Sonnet 4 context limit                                          pr_agent/algo/init.py • Increased Claude Sonnet 4 context limit from 200K to 1M tokens • Added explanatory comment about 1M context support +1/-1
Documentation	README.md Update documentation for 1M token defaults                              README.md • Updated GitHub Actions workflow example to use 1M tokens • Changed documentation table default from 100K to 1M tokens • Updated .pr_bot.toml configuration example +3/-3
Configuration changes	action.yaml Update GitHub Action default token limit                                  action.yaml • Changed default max_model_tokens input from 100K to 1M +1/-1      configuration.toml Raise global token limit configuration                                      pr_agent/settings/configuration.toml • Increased global max_model_tokens from 175K to 1M • Updated comment to reference Claude Sonnet 4 long context +1/-1

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[github-actions]

PR Reviewer Guide 🔍

(Review updated until commit e0cfa92)

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 1 🔵⚪⚪⚪⚪

AI Review Score: 90%

🧪 No relevant tests

Confidence score [1-100]: 88

Complexity score [1-10]: 2

Security score [1-10]: 10

Auto approve recommendation: true

Auto approve reasoning: This PR contains only straightforward configuration updates to increase token limits for Claude Sonnet 4. The changes are consistent across all relevant files (documentation, action config, and settings) and don't modify any core logic or introduce security risks. The updates align with Claude Sonnet 4's advertised 1M token context window capability.

🔒 No security concerns identified

⚡ No major issues detected

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🤖 Auto-approved PR

Reason: AI recommends approval with high confidence and security

This PR meets all auto-approval criteria.