Update GPT-5.5 prompt instructions#322443
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aeschli
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Jun 22, 2026
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Pull request overview
This PR updates the Copilot extension’s GPT‑5.5 agent prompt wiring by removing experiment-driven prompt variants/settings and moving GPT‑5.5 to a single unified prompt that includes tool search guidance.
Changes:
- Removed GPT‑5.5 experiment-based prompt variants and their corresponding configuration keys/settings.
- Updated GPT‑5.5 prompt implementation to a single consolidated instruction set and added tool-search reminder gating on
endpoint.supportsToolSearch. - Deleted the now-obsolete GPT‑5.5 “large prompt sections” and “economical search and edit” prompt modules.
Show a summary per file
| File | Description |
|---|---|
| extensions/copilot/src/platform/endpoint/common/chatModelCapabilities.ts | Removes GPT‑5.5 experiment capability helper functions tied to deprecated configuration. |
| extensions/copilot/src/platform/configuration/common/configurationService.ts | Removes deprecated GPT‑5.5 experiment config keys. |
| extensions/copilot/src/extension/prompts/node/agent/openai/gpt55Prompt.tsx | Implements the unified GPT‑5.5 system prompt and reminder instructions with tool-search guidance. |
| extensions/copilot/src/extension/prompts/node/agent/openai/gpt55LargePrompt.tsx | Deletes obsolete GPT‑5.5 large prompt experiment prompt variant module. |
| extensions/copilot/src/extension/prompts/node/agent/openai/gpt55EconomicalPrompt.tsx | Deletes obsolete GPT‑5.5 economical search/edit experiment prompt variant module. |
| extensions/copilot/src/extension/prompts/node/agent/openai/gpt55BasePrompt.tsx | Refactors/duplicates GPT‑5.5 prompt content into “base” (currently identical to gpt55Prompt.tsx). |
| extensions/copilot/package.nls.json | Removes localized descriptions for deleted GPT‑5.5 experiment settings. |
| extensions/copilot/package.json | Removes the deleted GPT‑5.5 experiment settings contributions. |
Copilot's findings
- Files reviewed: 8/8 changed files
- Comments generated: 1
Comment on lines
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| class Gpt55PromptResolver implements IAgentPrompt { | ||
| static async matchesModel(endpoint: IChatEndpoint): Promise<boolean> { | ||
| return isGpt55(endpoint); | ||
| } | ||
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npm run typecheck