Visual Studio Code 1.105 (code.visualstudio.com)

Visual Studio Code 1.105 (September 2025 release) centers on deeper AI agent integration, model support, and developer workflow improvements. The release ships richer chat/agent tooling (agent sessions view, delegate-to-agent flow, nested AGENTS.md support) and adds GPT-5-Codex and Anthropic’s Claude Sonnet 4.5 to the model picker—models aimed at agentic coding and real‑world automation. Key UX updates include OS notifications for chat responses, keyboard shortcuts for navigating chat messages, and experimental chain-of-thought “thinking” tokens (configurable via chat.agent.thinkingStyle) that surface model reasoning for debugging and transparency. Technically significant changes improve reliability and extensibility for AI workflows. Prompt files and chat modes now support fully qualified tool names (e.g., search/codebase or github/github-mcp-server/list_issues) to avoid naming conflicts and ease discovery. BYOK/custom-models get improved edit tools plus a learning mechanism (github.copilot.chat.customOAIModels) to choose optimal toolsets. The new MCP marketplace (preview) and autostart behavior simplify discovering and running MCP servers from the Extensions view, while MCP spec updates add server icons and default elicitation values. Terminal automation features—chat-specific terminal profiles and experimental autoReplyToPrompts—make background agents more practical. Overall, 1.105 tightens editor–agent integration, boosts reproducibility and discoverability of tools, and adds transparency and accessibility features for teams building agent-driven development workflows.