diff --git a/internal/interfacesnapshot/command_migrations.go b/internal/interfacesnapshot/command_migrations.go
index 62205fba..19aed105 100644
--- a/internal/interfacesnapshot/command_migrations.go
+++ b/internal/interfacesnapshot/command_migrations.go
@@ -21,6 +21,7 @@ const (
 
 	CommandMigrationMove           = "command_move"
 	CommandMigrationFlagExtraction = "flag_extraction"
+	CommandMigrationAvailability   = "schema_availability_hardening"
 )
 
 // CommandMigrationManifest governs compatibility-preserving surface moves that
@@ -64,6 +65,12 @@ type CommandMigrationSchema struct {
 	SourceToolID      string                      `json:"source_tool_id"`
 	ReplacementToolID string                      `json:"replacement_tool_id"`
 	Parameters        []CommandParameterMigration `json:"parameters"`
+	Availability      *CommandAvailabilityChange  `json:"availability,omitempty"`
+}
+
+type CommandAvailabilityChange struct {
+	Before string `json:"before"`
+	After  string `json:"after"`
 }
 
 type CommandParameterMigration struct {
@@ -126,14 +133,23 @@ func (m CommandMigrationManifest) Validate() error {
 }
 
 func (m CommandMigration) validate() error {
-	if m.Kind != CommandMigrationMove && m.Kind != CommandMigrationFlagExtraction {
+	if m.Kind != CommandMigrationMove && m.Kind != CommandMigrationFlagExtraction && m.Kind != CommandMigrationAvailability {
 		return fmt.Errorf("invalid kind %q", m.Kind)
 	}
-	if !isExactCommandPath(m.Legacy.Command) || !isExactCommandPath(m.Replacement.Command) {
-		return fmt.Errorf("legacy and replacement must be exact command paths rooted at dws")
-	}
-	if m.Legacy.Command == m.Replacement.Command {
-		return fmt.Errorf("legacy and replacement command paths must differ")
+	if m.Kind == CommandMigrationAvailability {
+		if !isExactCommandPath(m.Legacy.Command) {
+			return fmt.Errorf("legacy must be an exact command path rooted at dws")
+		}
+		if m.Replacement != (CommandMigrationSide{}) {
+			return fmt.Errorf("schema_availability_hardening must not declare replacement")
+		}
+	} else {
+		if !isExactCommandPath(m.Legacy.Command) || !isExactCommandPath(m.Replacement.Command) {
+			return fmt.Errorf("legacy and replacement must be exact command paths rooted at dws")
+		}
+		if m.Legacy.Command == m.Replacement.Command {
+			return fmt.Errorf("legacy and replacement command paths must differ")
+		}
 	}
 	if strings.TrimSpace(m.Reason) == "" || m.Reason != strings.TrimSpace(m.Reason) {
 		return fmt.Errorf("migration must include a non-empty trimmed reason")
@@ -141,12 +157,15 @@ func (m CommandMigration) validate() error {
 	if m.State != CommandMigrationPending && m.State != CommandMigrationConsumed {
 		return fmt.Errorf("invalid state %q", m.State)
 	}
-	for label, state := range map[string]CommandMigrationState{
-		"legacy before":      m.Legacy.Before,
-		"legacy after":       m.Legacy.After,
-		"replacement before": m.Replacement.Before,
-		"replacement after":  m.Replacement.After,
-	} {
+	states := map[string]CommandMigrationState{
+		"legacy before": m.Legacy.Before,
+		"legacy after":  m.Legacy.After,
+	}
+	if m.Kind != CommandMigrationAvailability {
+		states["replacement before"] = m.Replacement.Before
+		states["replacement after"] = m.Replacement.After
+	}
+	for label, state := range states {
 		if err := state.validate(label); err != nil {
 			return err
 		}
@@ -155,7 +174,8 @@ func (m CommandMigration) validate() error {
 		!m.Legacy.After.Present || !m.Legacy.After.Runnable {
 		return fmt.Errorf("legacy command must remain runnable and start visible")
 	}
-	if m.Replacement.Before.Present || !m.Replacement.After.Present || !m.Replacement.After.Runnable || m.Replacement.After.Hidden {
+	if m.Kind != CommandMigrationAvailability &&
+		(m.Replacement.Before.Present || !m.Replacement.After.Present || !m.Replacement.After.Runnable || m.Replacement.After.Hidden) {
 		return fmt.Errorf("replacement command must migrate exactly from absent to visible runnable")
 	}
 	if err := m.Schema.validate(m.Kind); err != nil {
@@ -214,6 +234,13 @@ func (m CommandMigration) validate() error {
 		if m.LegacyFlag.Before.NoOpt != wantNoOpt || m.LegacyFlag.After.NoOpt != wantNoOpt {
 			return fmt.Errorf("flag_extraction legacy_flag no_opt must equal replacement constant %q", wantNoOpt)
 		}
+	case CommandMigrationAvailability:
+		if !m.Legacy.After.Hidden {
+			return fmt.Errorf("schema_availability_hardening legacy command must migrate exactly from visible to hidden")
+		}
+		if m.LegacyFlag != (CommandMigrationFlag{}) {
+			return fmt.Errorf("schema_availability_hardening must not declare legacy_flag")
+		}
 	}
 	return nil
 }
@@ -259,9 +286,8 @@ func (f CommandMigrationFlag) validate() error {
 
 func (s CommandMigrationSchema) validate(kind string) error {
 	for label, value := range map[string]string{
-		"product_id":          s.ProductID,
-		"source_tool_id":      s.SourceToolID,
-		"replacement_tool_id": s.ReplacementToolID,
+		"product_id":     s.ProductID,
+		"source_tool_id": s.SourceToolID,
 	} {
 		if !isExactSchemaIdentifier(value) {
 			return fmt.Errorf("schema %s must be an exact identifier", label)
@@ -270,6 +296,21 @@ func (s CommandMigrationSchema) validate(kind string) error {
 	if s.Parameters == nil {
 		return fmt.Errorf("schema parameters must be an array")
 	}
+	if kind == CommandMigrationAvailability {
+		if s.ReplacementToolID != "" || len(s.Parameters) != 0 {
+			return fmt.Errorf("schema_availability_hardening must not declare a replacement tool or parameter mappings")
+		}
+		if s.Availability == nil || s.Availability.Before != "available" || s.Availability.After != "unavailable" {
+			return fmt.Errorf("schema_availability_hardening requires availability available to unavailable")
+		}
+		return nil
+	}
+	if !isExactSchemaIdentifier(s.ReplacementToolID) {
+		return fmt.Errorf("schema replacement_tool_id must be an exact identifier")
+	}
+	if s.Availability != nil {
+		return fmt.Errorf("%s must not declare schema availability", kind)
+	}
 	seenFrom := map[string]bool{}
 	seenTo := map[string]bool{}
 	seenConstantProperty := map[string]bool{}
@@ -344,6 +385,9 @@ func (m CommandMigration) key() string {
 }
 
 func (m CommandMigration) displayKey() string {
+	if m.Kind == CommandMigrationAvailability {
+		return fmt.Sprintf("%s %q", m.Kind, m.Legacy.Command)
+	}
 	return fmt.Sprintf("%s %q -> %q", m.Kind, m.Legacy.Command, m.Replacement.Command)
 }
 
@@ -401,7 +445,7 @@ func AuthorizeCommandMigrations(
 func validateCommandMoveLegacyLeaves(snapshot Snapshot, manifest CommandMigrationManifest) error {
 	commands := commandIndex(snapshot)
 	for _, migration := range manifest.Migrations {
-		if migration.Kind != CommandMigrationMove {
+		if migration.Kind != CommandMigrationMove && migration.Kind != CommandMigrationAvailability {
 			continue
 		}
 		if _, present := commands[migration.Legacy.Command]; !present {
@@ -409,7 +453,7 @@ func validateCommandMoveLegacyLeaves(snapshot Snapshot, manifest CommandMigratio
 		}
 		for _, command := range snapshot.Commands {
 			if strings.HasPrefix(command.Path, migration.Legacy.Command+" ") {
-				return fmt.Errorf("command_move legacy command %q must be a leaf", migration.Legacy.Command)
+				return fmt.Errorf("%s legacy command %q must be a leaf", migration.Kind, migration.Legacy.Command)
 			}
 		}
 	}
@@ -524,6 +568,15 @@ func sameCommandMigrationApproval(left, right CommandMigration) bool {
 func matchCommandMigrationPhase(snapshot Snapshot, migration CommandMigration) commandMigrationPhase {
 	commands := commandIndex(snapshot)
 	legacy := commandMigrationStateForCommand(commands, migration.Legacy.Command)
+	if migration.Kind == CommandMigrationAvailability {
+		if legacy == migration.Legacy.Before {
+			return commandMigrationBefore
+		}
+		if legacy == migration.Legacy.After {
+			return commandMigrationAfter
+		}
+		return commandMigrationPartial
+	}
 	replacement := commandMigrationStateForCommand(commands, migration.Replacement.Command)
 	before := legacy == migration.Legacy.Before && replacement == migration.Replacement.Before
 	after := legacy == migration.Legacy.After && replacement == migration.Replacement.After
@@ -629,6 +682,10 @@ func commandMigrationAuthorizesChange(current, reference Snapshot, change Change
 			if change.Kind == "command_became_hidden" && change.Flag == "" {
 				return true
 			}
+		case CommandMigrationAvailability:
+			if change.Kind == "command_became_hidden" && change.Flag == "" {
+				return true
+			}
 		case CommandMigrationFlagExtraction:
 			if change.Kind == "flag_became_hidden" && change.Flag == migration.LegacyFlag.Name {
 				return true
diff --git a/internal/interfacesnapshot/command_migrations_test.go b/internal/interfacesnapshot/command_migrations_test.go
index a7d5965e..77f382c6 100644
--- a/internal/interfacesnapshot/command_migrations_test.go
+++ b/internal/interfacesnapshot/command_migrations_test.go
@@ -186,6 +186,7 @@ func TestCrossPlatformCoverageCommandMigrationValidationEdges(t *testing.T) {
 		want   string
 	}{
 		{"identifier", CommandMigrationMove, func(s *CommandMigrationSchema) { s.ProductID = "bad/id" }, "exact identifier"},
+		{"replacement identifier", CommandMigrationMove, func(s *CommandMigrationSchema) { s.ReplacementToolID = "bad/id" }, "replacement_tool_id"},
 		{"nil parameters", CommandMigrationMove, func(s *CommandMigrationSchema) { s.Parameters = nil }, "must be an array"},
 		{"bad from", CommandMigrationMove, func(s *CommandMigrationSchema) { s.Parameters[0].From = "bad name" }, "exact parameter"},
 		{"duplicate from", CommandMigrationMove, func(s *CommandMigrationSchema) { s.Parameters = append(s.Parameters, s.Parameters[0]) }, "duplicates from"},
@@ -241,6 +242,96 @@ func TestCrossPlatformCoverageCommandMigrationValidationEdges(t *testing.T) {
 	}
 }
 
+func TestCrossPlatformCoverageSchemaAvailabilityMigrationLifecycle(t *testing.T) {
+	pending := availabilityCommandMigrationManifest(CommandMigrationPending)
+	consumed := availabilityCommandMigrationManifest(CommandMigrationConsumed)
+	empty := CommandMigrationManifest{Version: CommandMigrationManifestVersion, Migrations: []CommandMigration{}}
+	before := testSnapshot(
+		testCommand("dws"),
+		testCommand("dws devapp"),
+		testCommand("dws devapp +event-list"),
+	)
+	after := testSnapshot(
+		testCommand("dws"),
+		testCommand("dws devapp"),
+		Command{Path: "dws devapp +event-list", Runnable: true, Hidden: true},
+	)
+
+	got, err := AuthorizeCommandMigrations(
+		after,
+		map[string]Snapshot{"merge-base": before, "stable": before},
+		pending,
+		consumed,
+	)
+	if err != nil || len(got) != 1 {
+		t.Fatalf("availability lifecycle authorizations=%#v error=%v", got, err)
+	}
+	report, err := CompareAllWithInterfaceMigrations(
+		after,
+		map[string]Snapshot{"merge-base": before, "stable": before},
+		FlagMigrationManifest{Version: FlagMigrationManifestVersion, Migrations: []FlagMigration{}},
+		FlagMigrationManifest{Version: FlagMigrationManifestVersion, Migrations: []FlagMigration{}},
+		pending,
+		consumed,
+	)
+	if err != nil || !report.Compatible {
+		t.Fatalf("availability interface report compatible=%v error=%v report=%#v", report.Compatible, err, report)
+	}
+	if got, err := AuthorizeCommandMigrations(
+		before,
+		map[string]Snapshot{"merge-base": before, "stable": before},
+		empty,
+		pending,
+	); err != nil || len(got) != 0 {
+		t.Fatalf("candidate-added pending migration must remain inert: %#v, %v", got, err)
+	}
+
+	valid := pending.Migrations[0]
+	for _, test := range []struct {
+		name   string
+		mutate func(*CommandMigration)
+		want   string
+	}{
+		{"legacy path", func(m *CommandMigration) { m.Legacy.Command = "dws devapp *" }, "legacy must be an exact"},
+		{"replacement", func(m *CommandMigration) { m.Replacement.Command = "dws devapp other" }, "must not declare replacement"},
+		{"visible after", func(m *CommandMigration) { m.Legacy.After.Hidden = false }, "visible to hidden"},
+		{"legacy flag", func(m *CommandMigration) { m.LegacyFlag.Name = "legacy" }, "must not declare legacy_flag"},
+		{"missing availability", func(m *CommandMigration) { m.Schema.Availability = nil }, "requires availability"},
+		{"wrong availability", func(m *CommandMigration) { m.Schema.Availability.After = "available" }, "requires availability"},
+		{"parameter mapping", func(m *CommandMigration) {
+			m.Schema.Parameters = []CommandParameterMigration{{From: "cursor", To: "next-token"}}
+		}, "must not declare"},
+	} {
+		t.Run(test.name, func(t *testing.T) {
+			migration := cloneCommandMigration(valid)
+			if valid.Schema.Availability != nil {
+				change := *valid.Schema.Availability
+				migration.Schema.Availability = &change
+			}
+			test.mutate(&migration)
+			if err := migration.validate(); err == nil || !strings.Contains(err.Error(), test.want) {
+				t.Fatalf("availability migration validation error=%v, want %q", err, test.want)
+			}
+		})
+	}
+	if got := valid.displayKey(); !strings.Contains(got, CommandMigrationAvailability) {
+		t.Fatalf("availability display key = %q", got)
+	}
+	if got := matchCommandMigrationPhase(testSnapshot(testCommand("dws")), valid); got != commandMigrationPartial {
+		t.Fatalf("missing availability command phase = %q", got)
+	}
+	parent := before
+	parent.Commands = append(append([]Command(nil), before.Commands...), testCommand("dws devapp +event-list detail"))
+	if err := validateCommandMoveLegacyLeaves(parent, pending); err == nil || !strings.Contains(err.Error(), "must be a leaf") {
+		t.Fatalf("availability parent command error = %v", err)
+	}
+	moveSchema := commandMigrationManifest(CommandMigrationPending).Migrations[0].Schema
+	moveSchema.Availability = &CommandAvailabilityChange{Before: "available", After: "unavailable"}
+	if err := moveSchema.validate(CommandMigrationMove); err == nil || !strings.Contains(err.Error(), "must not declare schema availability") {
+		t.Fatalf("ordinary move availability error = %v", err)
+	}
+}
+
 func TestCrossPlatformCoverageFlagExtractionRejectsRequiredLegacyFlag(t *testing.T) {
 	for _, test := range []struct {
 		name   string
@@ -686,7 +777,10 @@ func flagExtractionCommandMigrationManifest(state string) CommandMigrationManife
 
 func cloneCommandMigration(source CommandMigration) CommandMigration {
 	cloned := source
-	cloned.Schema.Parameters = append([]CommandParameterMigration(nil), source.Schema.Parameters...)
+	if source.Schema.Parameters != nil {
+		cloned.Schema.Parameters = make([]CommandParameterMigration, len(source.Schema.Parameters))
+		copy(cloned.Schema.Parameters, source.Schema.Parameters)
+	}
 	for index, parameter := range source.Schema.Parameters {
 		if parameter.ReplacementConstant == nil {
 			continue
@@ -703,6 +797,28 @@ func singleCommandMigrationManifest(state string) CommandMigrationManifest {
 	return manifest
 }
 
+func availabilityCommandMigrationManifest(state string) CommandMigrationManifest {
+	return CommandMigrationManifest{
+		Version: CommandMigrationManifestVersion,
+		Migrations: []CommandMigration{{
+			Kind: CommandMigrationAvailability,
+			Legacy: CommandMigrationSide{
+				Command: "dws devapp +event-list",
+				Before:  CommandMigrationState{Present: true, Runnable: true},
+				After:   CommandMigrationState{Present: true, Runnable: true, Hidden: true},
+			},
+			Schema: CommandMigrationSchema{
+				ProductID:    "devapp",
+				SourceToolID: "devapp.shortcut_event_list",
+				Parameters:   []CommandParameterMigration{},
+				Availability: &CommandAvailabilityChange{Before: "available", After: "unavailable"},
+			},
+			State:  state,
+			Reason: "Fail closed until terminal pagination evidence is available.",
+		}},
+	}
+}
+
 func modifiedCommandManifest(source CommandMigrationManifest) CommandMigrationManifest {
 	modified := source
 	modified.Migrations = append([]CommandMigration(nil), source.Migrations...)
diff --git a/scripts/policy/schema-compat/command_migrations_test.go b/scripts/policy/schema-compat/command_migrations_test.go
index 613d449d..c87c9672 100644
--- a/scripts/policy/schema-compat/command_migrations_test.go
+++ b/scripts/policy/schema-compat/command_migrations_test.go
@@ -13,6 +13,69 @@ import (
 	"github.com/DingTalk-Real-AI/dingtalk-workspace-cli/internal/interfacesnapshot"
 )
 
+func TestCrossPlatformCoverageSchemaAvailabilityMigrationNormalizesOnlyAvailability(t *testing.T) {
+	baseline := baselineContract()
+	current := cloneContract(baseline)
+	mutateTool(&current, func(tool *toolSchema) { tool.Availability = "unavailable" })
+	migration := interfacesnapshot.CommandMigration{
+		Kind: interfacesnapshot.CommandMigrationAvailability,
+		Legacy: interfacesnapshot.CommandMigrationSide{
+			Command: "dws doc create",
+			Before:  interfacesnapshot.CommandMigrationState{Present: true, Runnable: true},
+			After:   interfacesnapshot.CommandMigrationState{Present: true, Runnable: true, Hidden: true},
+		},
+		Schema: interfacesnapshot.CommandMigrationSchema{
+			ProductID:    "doc",
+			SourceToolID: "doc.create",
+			Parameters:   []interfacesnapshot.CommandParameterMigration{},
+			Availability: &interfacesnapshot.CommandAvailabilityChange{Before: "available", After: "unavailable"},
+		},
+		State:  interfacesnapshot.CommandMigrationPending,
+		Reason: "Reviewed fail-closed availability hardening.",
+	}
+
+	normalized, err := normalizeSchemaCommandMigrations(baseline, current, []interfacesnapshot.CommandMigration{migration})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got := normalized.Products["doc"].Tools["doc.create"].Availability; got != "unavailable" {
+		t.Fatalf("normalized availability = %q", got)
+	}
+	if failures := checkCompatibility(normalized, current); len(failures) != 0 {
+		t.Fatalf("availability hardening failures = %v", failures)
+	}
+
+	unrelated := cloneContract(current)
+	mutateTool(&unrelated, func(tool *toolSchema) { tool.Risk = "high" })
+	normalized, err = normalizeSchemaCommandMigrations(baseline, unrelated, []interfacesnapshot.CommandMigration{migration})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if failures := strings.Join(checkCompatibility(normalized, unrelated), "\n"); !strings.Contains(failures, "changed risk") {
+		t.Fatalf("unrelated risk drift was hidden: %q", failures)
+	}
+
+	alreadyAfter := cloneContract(current)
+	if _, err := normalizeSchemaCommandMigrations(alreadyAfter, current, []interfacesnapshot.CommandMigration{migration}); err != nil {
+		t.Fatalf("consumed merge-base availability should remain inert: %v", err)
+	}
+	wrongPath := cloneContract(current)
+	mutateTool(&wrongPath, func(tool *toolSchema) { tool.PrimaryCLIPath = "doc other" })
+	normalized, err = normalizeSchemaCommandMigrations(baseline, wrongPath, []interfacesnapshot.CommandMigration{migration})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got := normalized.Products["doc"].Tools["doc.create"].Availability; got != "available" {
+		t.Fatalf("wrong-path migration changed availability to %q", got)
+	}
+	wrong := cloneContract(current)
+	mutateTool(&wrong, func(tool *toolSchema) { tool.Availability = "available" })
+	if _, err := normalizeSchemaCommandMigrations(baseline, wrong, []interfacesnapshot.CommandMigration{migration}); err == nil ||
+		!strings.Contains(err.Error(), "does not match Schema availability") {
+		t.Fatalf("wrong availability error = %v", err)
+	}
+}
+
 func TestCrossPlatformCoverageSchemaCommandMigrationsAuthorizeOnlyExactProjection(t *testing.T) {
 	baseline := schemaCommandMigrationContract(false)
 	current := schemaCommandMigrationContract(true)
diff --git a/scripts/policy/schema-compat/main.go b/scripts/policy/schema-compat/main.go
index 5040f626..c7d933ae 100644
--- a/scripts/policy/schema-compat/main.go
+++ b/scripts/policy/schema-compat/main.go
@@ -1875,6 +1875,24 @@ func normalizeSchemaCommandMigrations(
 		normalizedProduct := normalized.Products[migration.Schema.ProductID]
 		normalizedTool := normalizedProduct.Tools[migration.Schema.SourceToolID]
 		switch migration.Kind {
+		case interfacesnapshot.CommandMigrationAvailability:
+			change := migration.Schema.Availability
+			if change != nil && oldTool.Availability == change.After && newSource.Availability == change.After {
+				continue
+			}
+			if change == nil || oldTool.Availability != change.Before || newSource.Availability != change.After {
+				return schemaContract{}, fmt.Errorf(
+					"approved availability hardening %q does not match Schema availability %q -> %q",
+					migration.Legacy.Command,
+					oldTool.Availability,
+					newSource.Availability,
+				)
+			}
+			if newSource.PrimaryCLIPath != legacyPath {
+				continue
+			}
+			normalizedTool.Availability = newSource.Availability
+
 		case interfacesnapshot.CommandMigrationMove:
 			if newSource.PrimaryCLIPath != replacementPath {
 				continue