feat(wasm): outbound TCP for core modules (wippy:sock/tcp)

boot/components/runtime/wasm/engine_test.go

@@ -56,6 +56,9 @@ func TestDefaultHostProfiles(t *testing.T) {
 		"funcs", "wasi1",
 		"wasi:io", "wasi:poll", "wasi:clocks", "wasi:cli",
 		"wasi:filesystem", "wasi:random", "wasi:sockets", "wasi:http",
+		// Core modules cannot import wasi:sockets or wasi:http, both of which are
+		// component-only, so they get outbound TCP through this one instead.
+		"wippy:sock/tcp",
 	}
 	if len(profiles) != len(want) {
 		t.Fatalf("DefaultHostProfiles() len = %d, want %d", len(profiles), len(want))

boot/components/runtime/wasm/hosts.go

@@ -5,9 +5,12 @@ package wasm
 import (
 	"context"
 
+	"github.com/tetratelabs/wazero/api"
+
 	"github.com/wippyai/runtime/api/dispatcher"
 	runtimewasm "github.com/wippyai/runtime/runtime/wasm"
 	wasmcomponent "github.com/wippyai/runtime/runtime/wasm/component"
+	"github.com/wippyai/runtime/runtime/wasm/host/wippy/hosts/coresock"
 	wasmrt "github.com/wippyai/wasm-runtime/runtime"
 	"github.com/wippyai/wasm-runtime/wasi/preview2"
 	"go.uber.org/zap"
@@ -29,6 +32,7 @@ func DefaultHostProfiles(log *zap.Logger, disp dispatcher.Dispatcher) []wasmcomp
 		wasiRandomProfile(log),
 		wasiSocketsProfile(log),
 		wasiHTTPProfile(disp, log),
+		coreSockProfile(log),
 	}
 }
 
@@ -151,3 +155,52 @@ func wasiHTTPProfile(d dispatcher.Dispatcher, log *zap.Logger) wasmcomponent.Hos
 		},
 	}
 }
+
+// coreSockProfile exposes outbound TCP to core modules.
+//
+// Deliberately not ComponentOnly: wasi:sockets and wasi:http both are, so a core
+// module has no way to reach the network at all. The signatures are raw integers
+// because that is what a core import can express, and the calls are async so the
+// guest yields while the host waits on the connection.
+func coreSockProfile(log *zap.Logger) wasmcomponent.HostProfile {
+	return wasmcomponent.HostProfile{
+		Name:    coresock.Namespace,
+		Aliases: []string{coresock.Namespace, "wippy:sock"},
+		Register: func(_ context.Context, rt *wasmrt.Runtime) error {
+			host := coresock.New(log)
+			i32, i64 := api.ValueTypeI32, api.ValueTypeI64
+
+			// Registered synchronous on purpose. Declaring them async makes the
+			// engine asyncify-transform the whole guest, and instrumenting a 10 MB
+			// interpreter pushes wazero's compile past the runtime's 30s entry-load
+			// timeout. The guest call is synchronous anyway, so the host blocking on
+			// the socket is exactly the required behavior.
+			register := func(name string, params, results []api.ValueType, fn api.GoModuleFunc) error {
+				if err := rt.RegisterCoreFunc(coresock.Namespace, name, params, results, fn, false); err != nil {
+					return runtimewasm.NewRegisterHostError(coresock.Namespace, err)
+				}
+				return nil
+			}
+
+			if err := register("connect",
+				[]api.ValueType{i32, i32, i32, i32}, []api.ValueType{i64}, host.Connect); err != nil {
+				return err
+			}
+			if err := register("send",
+				[]api.ValueType{i32, i32, i32}, []api.ValueType{i64}, host.Send); err != nil {
+				return err
+			}
+			if err := register("recv",
+				[]api.ValueType{i32, i32, i32}, []api.ValueType{i64}, host.Recv); err != nil {
+				return err
+			}
+			if err := register("close",
+				[]api.ValueType{i32}, []api.ValueType{i32}, host.Close); err != nil {
+				return err
+			}
+
+			log.Info("wasm host profile registered", zap.String("profile", coresock.Namespace))
+			return nil
+		},
+	}
+}

go.mod

@@ -68,7 +68,7 @@ require (
 	github.com/wippyai/tree-sitter-markdown v0.0.3
 	github.com/wippyai/tree-sitter-sql v0.0.4
 	github.com/wippyai/wapp v0.1.2
-	github.com/wippyai/wasm-runtime v0.0.0-20260719152804-ec6962b31c64
+	github.com/wippyai/wasm-runtime v0.0.0-20260731193643-289ea709d8e8
 	github.com/xuri/excelize/v2 v2.11.0
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.69.0
 	go.opentelemetry.io/otel v1.44.0

go.sum

@@ -562,6 +562,8 @@ github.com/wippyai/wapp v0.1.2 h1:fCoxKr9s3gk+pWx4XcnIQmOVgPiuimXf3QcE9mHbdmw=
 github.com/wippyai/wapp v0.1.2/go.mod h1:ndCkYR80+osLGbd7AFWlP+3DxwooR+R6cxQYPZhksg4=
 github.com/wippyai/wasm-runtime v0.0.0-20260719152804-ec6962b31c64 h1:ETP3ZooZzg4hUZYnfz/ZPdqvpWAduQ9nHK+XqkOBkj8=
 github.com/wippyai/wasm-runtime v0.0.0-20260719152804-ec6962b31c64/go.mod h1:81IhzsGQBNRyLqynOAYK9WLsMx9CoqtwsEf0B6PwL5k=
+github.com/wippyai/wasm-runtime v0.0.0-20260731193643-289ea709d8e8 h1:ELbGKx6QgYh1TUw7rLEv7AqndO9deBbGzmXhBb6Vvpw=
+github.com/wippyai/wasm-runtime v0.0.0-20260731193643-289ea709d8e8/go.mod h1:81IhzsGQBNRyLqynOAYK9WLsMx9CoqtwsEf0B6PwL5k=
 github.com/x448/float16 v0.8.4 h1:qLwI1I70+NjRFUR3zs1JPUCgaCXSh3SW62uAKT1mSBM=
 github.com/x448/float16 v0.8.4/go.mod h1:14CWIYCyZA/cWjXOioeEpHeN/83MdbZDRQHoFcYsOfg=
 github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e h1:JVG44RsyaB9T2KIHavMF/ppJZNG9ZpyihvCd0w101no=