Interface CanvasHandler

go/canvas.go:94–98

CanvasHandler is the provider-side canvas lifecycle handler. A session installs a single CanvasHandler (via SessionConfig.CanvasHandler). The handler receives every inbound `canvas.open` / `canvas.close` / `canvas.action.invoke` JSON-RPC request the runtime issues for this session and decides — typ

// Experimental: CanvasHandler is part of an experimental wire-protocol
// surface and may change or be removed in future SDK or CLI releases.
type CanvasHandler interface {
	OnOpen(ctx context.Context, c rpc.CanvasProviderOpenRequest) (rpc.CanvasProviderOpenResult, error)
	OnClose(ctx context.Context, c rpc.CanvasProviderCloseRequest) error
	OnAction(ctx context.Context, c rpc.CanvasProviderInvokeActionRequest) (any, error)
}

// CanvasHandlerDefaults supplies default OnClose / OnAction implementations
// that consumers can inherit by embedding it in their CanvasHandler.