Split toolsrv/registry.go:
- cmd/toolsrv/registry.go: Registry type with session-scoped tool state
(Load, Unload, Loaded, Lookup, Revision methods)
- toolsrv/registry.go: shared types only (ToolInfo, ToolsPath, DiscoverTools)
The toolsrv/ package is now a pure client SDK:
- Dial, Conn for 9P connection
- ToolInfo, ToolResult, HostInfo types
- DiscoverTools for listing available tools
Server-only code lives in cmd/toolsrv/:
- Registry for session-scoped tool state
- 9P handlers and execution logic
- Sandbox integration
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