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Project	Deployment	Actions	Updated (UTC)
docs	Skipped		Feb 11, 2026 0:26am

Greptile Overview

Greptile Summary

This PR refactors copilot configuration to support enterprise deployments by moving model management from static frontend config to dynamic backend APIs.

Key Changes:

• Deleted 337 lines of complex provider configuration logic (lib/copilot/config.ts)
• Replaced hardcoded model lists with dynamic fetching from backend via new /api/copilot/models endpoint
• Introduced composite model keys (provider/modelId format) to uniquely identify models across different providers
• Moved chat title generation from frontend to backend API call
• Removed COPILOT_PROVIDER and COPILOT_MODEL environment variables
• Simplified provider configuration from complex object to simple string parameter

Architecture Impact:
The refactor centralizes control in the enterprise backend, allowing IT admins to configure available models server-side rather than requiring frontend code changes. This is a significant architectural shift toward enterprise configurability.

Minor Concerns:

• Edge case handling for legacy model IDs without provider prefix could be improved
• The composite model key pattern (provider/modelId) is used inconsistently - some code checks for slash presence while store initialization assumes the format

Confidence Score: 4/5

• This PR is safe to merge with minor edge case considerations
• The refactor successfully removes complex configuration logic and centralizes model management in the backend. The code changes are well-structured with proper type guards and error handling. However, there's a minor concern about legacy model ID migration and composite key format consistency that could cause issues if users have persisted old model selections.
• Pay close attention to apps/sim/stores/panel/copilot/store.ts - verify the composite model key logic handles edge cases correctly, especially for users upgrading from previous versions

Important Files Changed

Sequence Diagram

sequenceDiagram
    participant UI as Copilot UI
    participant Store as Copilot Store
    participant ModelsAPI as /api/copilot/models
    participant ChatAPI as /api/copilot/chat
    participant Backend as SIM Agent Backend
    
    Note over UI,Store: Initialization Flow
    UI->>Store: loadAvailableModels()
    Store->>ModelsAPI: GET /api/copilot/models
    ModelsAPI->>Backend: GET /api/get-available-models
    Backend-->>ModelsAPI: {models: [{id, friendlyName, provider}]}
    ModelsAPI-->>Store: {success: true, models: [...]}
    Store->>Store: Transform to composite keys (provider/modelId)
    Store->>Store: Select default model (anthropic/claude-opus-4-6)
    Store-->>UI: Available models loaded
    
    Note over UI,Backend: Chat Message Flow
    UI->>Store: sendMessage(message)
    Store->>Store: parseModelKey(selectedModel)
    Store->>Store: Extract provider and modelId
    Store->>ChatAPI: POST {message, model: modelId, provider}
    ChatAPI->>Backend: POST /api/chat {model, provider, message}
    Backend-->>ChatAPI: Stream response
    ChatAPI-->>Store: SSE events
    Store-->>UI: Update messages
    
    Note over ChatAPI,Backend: Title Generation (First Message)
    ChatAPI->>Backend: POST /api/generate-chat-title {message, model, provider}
    Backend-->>ChatAPI: {title: "..."}
    ChatAPI->>ChatAPI: Update chat title in DB