Add GPT-5.5 prompt experiment flags#315603
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Pull request overview
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Copilot was unable to run its full agentic suite in this review.
Adds two experiment flags for GPT-5.5 prompt behavior, defaulting to disabled, and wires them into the GPT-5.5 agent prompt to conditionally include additional instruction sections.
Changes:
- Introduces
gpt55EconomicalSearchAndEditandgpt55LargePromptSectionsexperiment-backed config keys (defaultfalse). - Registers the new settings in
package.jsonand adds user-facing descriptions inpackage.nls.json. - Updates the GPT-5.5 prompt to read these flags and conditionally emit larger instruction blocks.
Show a summary per file
| File | Description |
|---|---|
| extensions/copilot/src/platform/configuration/common/configurationService.ts | Adds experiment-based config keys for new GPT-5.5 prompt flags. |
| extensions/copilot/src/extension/prompts/node/agent/openai/gpt55Prompt.tsx | Reads the new flags and gates additional prompt instruction sections. |
| extensions/copilot/package.nls.json | Adds localized descriptions for the new settings. |
| extensions/copilot/package.json | Registers the new github.copilot.chat.* settings with defaults disabled. |
Copilot's findings
- Files reviewed: 4/4 changed files
- Comments generated: 3
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
dmitrivMS
previously approved these changes
May 11, 2026
sandy081
approved these changes
May 11, 2026
dileepyavan
added a commit
that referenced
this pull request
May 12, 2026
…ags (#315906) * Refactor GPT-5.5 prompt variants by experiment flags * Add GPT-5.5 prompt experiment config keys * Add GPT-5.5 prompt experiment flags (#315603) * Add GPT-5.5 prompt experiment flags * Potential fix for pull request finding Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> --------- Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> --------- Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
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Adds the following GPT-5.5 experiment flags:
github.copilot.chat.gpt55EconomicalSearchAndEdit.enabled: gates economical search and edit instructions.github.copilot.chat.gpt55LargePromptSections.enabled: gates additional GPT-5.4 Large prompt sections for GPT-5.5.Both flags default to disabled.