Copilot Chat v0.42.2026032501: Debug & Cache Fixes
Copilot Chat v0.42.2026032501 reverts cache TTL support, adds debug logging for inline edits, and fixes hook execution. Three breaking changes to review.
TL;DR
- Reverted extended prompt cache TTL support — cache behavior back to baseline
- Live debug logging for NES inline edit requests now available
- Fixed stop and subagent stop hooks; removed legacy GPT-4.1 summarization setting
New
- Live debug log entries for NES inline edits — Better visibility into inline edit request flow for troubleshooting.
- Session refresh command — New command to refresh changes within active sessions.
- Permissive hook names — Subagent and top-level hooks now accept more flexible naming conventions.
Fixed
- Stop and subagent stop hooks — Corrected hook execution logic for proper cleanup.
- NES URI handling — No longer includes URI when target document matches active document, reducing redundant data.
- Anthropic cache control config — Updated configuration handling for cache control parameters.
Breaking Changes
- Extended prompt cache TTL reverted — Cache time-to-live support has been rolled back; use standard TTL values.
- AgentHistorySummarizationForceGpt41 setting removed — This legacy setting is no longer available; remove from your configuration if present.
- Local index concept removed — Indexing behavior has changed; verify your agent configurations.
Update via VS Code extensions marketplace or run code --install-extension ms-github.copilot-chat.
Source: Copilot Chat
