Epic: Complete Chutes API Integration (Umbrella PR)

[echobt]

Epic: Complete Chutes API Integration

Overview

This is the umbrella PR that coordinates the complete migration from OpenRouter/litellm to the Chutes API with Kimi K2.5-TEE model support.

Child PRs (Do NOT merge this PR directly)

PR	Feature	Status	Dependency
#7	feat: Integrate Chutes API with Kimi K2.5-TEE model	Open	None
#8	docs: Comprehensive documentation with Mermaid diagrams	Open	#7
#9	feat: Remove OpenRouter support, replace litellm with Chutes API	Open	#7, #8

Merge Strategy

Following git best practices for stacked PRs:

1. Merge feat: Integrate Chutes API with Kimi K2.5-TEE model #7 first - Base Chutes API integration (independent feature)
2. Rebase docs: Comprehensive documentation with Mermaid diagrams #8 on main - Update docs after API changes land
3. Merge docs: Comprehensive documentation with Mermaid diagrams #8 - Documentation updates
4. Rebase feat: Remove OpenRouter support, replace litellm with Chutes API #9 on main - Final cleanup PR rebased on latest
5. Merge feat: Remove OpenRouter support, replace litellm with Chutes API #9 - Complete the migration
6. Close this umbrella PR - Do NOT merge this PR, just close after children are merged

Goals

• Integrate Chutes API with Kimi K2.5-TEE model support
• Add comprehensive documentation with Mermaid diagrams
• Remove OpenRouter dependency
• Replace litellm with native httpx client
• Security hardening (environment variables, path traversal)

Security Improvements

• Shell tool: Allowlist-based environment variable passing
• Path traversal protection in resolve_path()
• API key handling improvements

Instructions for Reviewers

1. Review child PRs individually (feat: Integrate Chutes API with Kimi K2.5-TEE model #7, docs: Comprehensive documentation with Mermaid diagrams #8, feat: Remove OpenRouter support, replace litellm with Chutes API #9)
2. Approve and merge in order (respecting dependencies listed above)
3. Do NOT merge this umbrella PR - Close it after all children are merged

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Related PRs:

• feat: Integrate Chutes API with Kimi K2.5-TEE model #7 - Chutes API integration (base feature)
• docs: Comprehensive documentation with Mermaid diagrams #8 - Documentation (depends on feat: Integrate Chutes API with Kimi K2.5-TEE model #7)
• feat: Remove OpenRouter support, replace litellm with Chutes API #9 - OpenRouter removal (depends on feat: Integrate Chutes API with Kimi K2.5-TEE model #7, docs: Comprehensive documentation with Mermaid diagrams #8)

This PR follows the stacked PRs pattern for managing related changes with clear dependencies.

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch umbrella/chutes-api-complete-integration

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