Copilot Chat v0.43: Tool Token & Reasoning Fixes
Copilot Chat fixes tool token counting with Anthropic Tool Search, guards reasoning parameters, and removes problematic window middleware.
copilot
Updates from GitHub Copilot ecosystem
Copilot CLI 1.0.19: MCP Persistence & Telemetry
Copilot CLI 1.0.19 adds persistent MCP settings, OpenTelemetry monitoring improvements, and fixes for macOS plugin execution and custom agent restoration.
GitHub Copilot CLI's Rubber Duck Uses Cross-Model Review
GitHub Copilot CLI's new Rubber Duck feature uses a second AI model family to review agent plans and code. Claude Sonnet + GPT-5.4 closes 74.7% of the performance gap to Opus on difficult multi-file tasks.
Copilot Chat v0.43: Agent Instructions Discovery Fix
Copilot Chat now discovers AGENTS.md and CLAUDE.md files at workspace roots as agent instructions, fixing a gap where only copilot-instructions.md was being found.
Copilot CLI v1.0.19-0: Session & Plugin Fixes
Copilot CLI 1.0.19-0 fixes session conflicts, improves timeline visibility, and resolves macOS plugin permissions and custom agent restoration issues.
Copilot Chat v0.43: Agent Discovery & Tool Fixes
Copilot Chat v0.43 fixes agent discovery, tool handling in summarization, and improves session initialization with better backward compatibility.
Copilot CLI v1.0.18: Critic Agent & Session Resume
Copilot CLI 1.0.18 adds a Critic agent for error detection, improves session organization, and streamlines permission handling with hook updates.