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Grok Build Src

xAI · Web

Grok Build Src 6e386420825b

69f0ba880aa9→6e386420825b·July 24, 2026 at 5:04 PM UTC

Tree sync for 0.2.111: plugin subagents inherit parent MCP servers, and the default web-search model is now grok-4.5.

Changelog

  • [fix] Plugin subagents inherit the parent session’s connected MCP servers (default mcpInheritance: all), so search_tool / use_tool behave like they do for local agents. Plugin agents still cannot declare their own MCP servers, hooks, or elevated permission modes.
  • [changed] Default web_search model is grok-4.5 (replacing grok-4.20-multi-agent).
  • [removed] Model grok-4.20-multi-agent is no longer in the default model list.
  • [changed] Docs and config examples use grok-4.5 as the default session model (replacing older grok-build / multi-agent examples where those appeared).

Agent & tools

  • Subagent frontmatter supports mcpInheritance: all (default), none, named: […], or except: […].
  • Plugin-sourced agents get the same parent MCP inheritance rules; they still cannot add private mcpServers, hooks, or permissionMode: bypassPermissions in agent frontmatter.
  • Plugin-bundled MCP (plugin .mcp.json) continues to attach at the parent/session after the plugin is trusted.

Docs

  • Plugins guide rewritten around marketplaces: add/install flow, trust, authoring, pinned versions, and organization distribution controls.
  • Subagents and MCP servers document MCP inheritance and how to debug an empty search_tool / use_tool catalog on a child.
  • Permissions and safety, agent mode, and headless mode reorganized around always-approve / automation (--always-approve, --yolo, bypassPermissions, session _meta.yoloMode) with clearer mode tables and SDK examples.
  • Skills points at marketplace packaging for team-wide distribution.
  • /copy and terminal clipboard notes: confirmed copies toast briefly; unverified OSC 52 / unreachable clipboard paths name the backup file.
  • User-guide index blurbs updated for plugins and permissions.

Under the hood

  • Product/changelog version remains 0.2.111.
  • Default model map: web_search → grok-4.5; grok-4.20-multi-agent dropped from the shipped model list.

Upgrade notes

  • If you pinned GROK_WEB_SEARCH_MODEL or [models].web_search to grok-4.20-multi-agent, switch that value to grok-4.5 (or another model you still ship).
  • Plugin authors relying on subagents + MCP should confirm parent session servers are connected and review mcpInheritance if a child should see a narrower set.
Older release← 69f0ba880aa9Newer release→ 47348d13ec45
All Grok Build Src releases →