Custom vsc model prompt

[AbdelrahmanAbouelenin]

Changes

We want to extend custom system prompt and preamble instructions for experimental VSC model family using hash-based detection.

Vsc Custom Prompt

1- System Prompt (vscModelPrompts.tsx):

• Planning guidelines for manage_todo_list tool (trivial vs non-trivial tasks)
• Markdown formatting rules for structured responses

2- Preamble Instructions:

• Injected into every user message after reminder instructions
• Concise status updates between tool calls (1-2 sentences)
• Varied openings, focus on findings and next steps

Implementation

• Used isHiddenModelByModelId to check if the model id it's one of the hidden models
• Used special reminder to emphasis on preamble instructions

[Copilot]

Pull Request Overview

This PR extends custom system prompts and preamble instructions specifically for experimental VSC model family members using hash-based detection. The changes introduce specialized prompting behavior for hidden models while maintaining backward compatibility with existing model-specific prompts.

Key Changes

• Added hash-based detection for hidden model IDs to enable VSC-specific prompt routing
• Created comprehensive VSC model prompt with planning guidelines, markdown formatting rules, and preamble instructions
• Integrated preamble reminders into user messages for hidden models to reinforce instruction adherence

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
src/platform/endpoint/common/chatModelCapabilities.ts	Adds isHiddenModelById function and HIDDEN_MODEL_A_ID_HASHES constant for model ID detection
src/extension/prompts/node/agent/vscModelPrompts.tsx	New file defining VSCModelPrompt with planning, formatting, and preamble instructions
src/extension/prompts/node/agent/allAgentPrompts.ts	Imports the new VSC model prompts module
src/extension/prompts/node/agent/agentPrompt.tsx	Updates prompt resolution logic to use VSC prompts for hidden models and adds preamble reminders

[bhavyaus]

this will get called for all models. regardless of vsc models. I'd rather we have a special handling for just the hashes.

[AbdelrahmanAbouelenin]

I don't follow; this needs to be called for all models to check if they belong to vsc models.

[AbdelrahmanAbouelenin]

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