chore: import upstream snapshot with attribution

extension/platform/example_test.go

@@ -0,0 +1,63 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
+package platform_test
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/larksuite/cli/extension/platform"
+)
+
+// ExampleNewPlugin_observer registers an audit Observer that fires
+// after every command, regardless of success or failure.
+func ExampleNewPlugin_observer() {
+	p, _ := platform.NewPlugin("audit", "0.1.0").
+		Observer(platform.After, "log", platform.All(),
+			func(ctx context.Context, inv platform.Invocation) {
+				_ = inv.Cmd().Path() // do something useful with the command
+			}).
+		FailOpen().
+		Build()
+	fmt.Println(p.Name(), p.Version())
+	// Output: audit 0.1.0
+}
+
+// ExampleNewPlugin_wrapper registers a Wrap that short-circuits any
+// write-class command. The framework converts the returned
+// *AbortError into a structured "hook" envelope; observers still
+// fire on the After stage so audit sees the attempt.
+func ExampleNewPlugin_wrapper() {
+	p, _ := platform.NewPlugin("policy-plugin", "0.1.0").
+		Wrap("block-writes", platform.ByWrite(),
+			func(next platform.Handler) platform.Handler {
+				return func(ctx context.Context, inv platform.Invocation) error {
+					return &platform.AbortError{
+						HookName: "block-writes",
+						Reason:   "writes are disabled for this session",
+					}
+				}
+			}).
+		FailOpen().
+		Build()
+	fmt.Println(p.Capabilities().FailurePolicy == platform.FailOpen)
+	// Output: true
+}
+
+// ExampleNewPlugin_restrict registers a policy plugin that allows
+// only docs/* read commands. Note that Restrict() implicitly sets
+// FailClosed — a policy plugin must abort the binary if it fails to
+// install, not silently disappear.
+func ExampleNewPlugin_restrict() {
+	p, _ := platform.NewPlugin("readonly-docs", "0.1.0").
+		Restrict(&platform.Rule{
+			Name:    "docs-only",
+			Allow:   []string{"docs/**"},
+			MaxRisk: platform.RiskRead,
+		}).
+		Build()
+	caps := p.Capabilities()
+	fmt.Println(caps.Restricts, caps.FailurePolicy == platform.FailClosed)
+	// Output: true true
+}