{"version":"0.199.0","date":"2026-08-18","dateFormatted":"August 18, 2026","url":"https://docs.factory.ai/changelog/release-notes#v0.199.0","jsonUrl":"https://docs.factory.ai/changelog/releases/0.199.0.json","summary":"The explorer droid can use every read-only tool, agent questions are easier to answer from the keyboard, and diagrams and long sessions render better in the app","surfaces":["cli","app","api","enterprise"],"changes":[{"type":"improvement","surface":"cli","title":"Explorer tool access"},{"type":"improvement","surface":"cli","title":"Question prompt keyboard controls"},{"type":"fix","surface":"cli","title":"Agent question context"},{"type":"feature","surface":"api","title":"SDK custom system prompts"},{"type":"improvement","surface":"app","title":"Mermaid diagram rendering"},{"type":"improvement","surface":"app","title":"Faster session rendering"},{"type":"improvement","surface":"app","title":"Mission model settings"},{"type":"feature","surface":"enterprise","title":"Managed BYOK model defaults"},{"type":"feature","surface":"enterprise","title":"Service account model policies"}],"security":[],"deprecations":[],"contentText":"New features\n\n- SDK custom system prompts - The TypeScript SDK can now set a custom system prompt for a session, and it is kept when the session resumes\n- Managed BYOK model defaults - Org admins can now pick BYOK custom models as managed defaults for sessions and subagents in Enterprise Controls\n- Service account model policies - Service accounts now appear in Enterprise Controls model policies, so admins can set which models each one may use\n\nImprovements\n\n- Explorer tool access - The built-in explorer droid can now use every read-only tool, including command execution, web search, and MCP tools, while file edits stay blocked\n- Question prompt keyboard controls - You can now pick answers with Space or the number keys, move between questions with Tab, and go back to edit an answer you already gave\n- Mermaid diagram rendering - Diagrams in a session now render with the official Mermaid engine, so more diagram types display correctly (app)\n- Faster session rendering - Long sessions and streaming command output now render with less lag, so scrolling and typing stay responsive while the agent runs (app)\n- Mission model settings - You can now choose the models and reasoning defaults a mission uses from its settings (app)\n\nBug fixes\n\n- Agent question context - The context the agent includes with a question now stays visible while you answer it"}