diff --git a/internal/tui/CLAUDE.md b/internal/tui/CLAUDE.md
index 014298d..631118e 100644
--- a/internal/tui/CLAUDE.md
+++ b/internal/tui/CLAUDE.md
@@ -9,7 +9,7 @@ Implements the two-pane plugin manager interface using Bubble Tea's Elm Architec
 ## Contracts
 
 - **Exposes**: `NewModel(client, workingDir) -> *Model`, implements `tea.Model` interface
-- **Guarantees**: Pending operations (install/uninstall/enable/disable/scope-change) tracked until explicit Apply. Filter preserves selection when possible. Only project/local plugins for current workingDir are shown (plus user-scoped plugins).
+- **Guarantees**: Pending operations (install/uninstall/enable/disable/scope-change) tracked until explicit Apply. Filter preserves selection when possible. All plugins (available + installed) are shown; installed state (scopes, enabled/disabled) reflects only the current workingDir. Plugins installed elsewhere appear without install state.
 - **Expects**: Valid `claude.Client` implementation. Terminal with reasonable size (handles resize).
 
 ## Dependencies
diff --git a/internal/tui/model.go b/internal/tui/model.go
index 699beb7..15b63c0 100644
--- a/internal/tui/model.go
+++ b/internal/tui/model.go
@@ -398,7 +398,7 @@ func (m *Model) loadPlugins() tea.Msg {
 }
 
 // mergePlugins combines installed and available plugins, grouped by marketplace.
-// Only installed plugins relevant to workingDir are included.
+// All plugins are shown; installed state reflects the current workingDir only.
 func mergePlugins(list *claude.PluginList, workingDir string) []PluginState {
 	allScopes := claude.GetAllEnabledPlugins(workingDir)
 	installedByID := buildInstalledByID(list.Installed)
@@ -407,13 +407,14 @@ func mergePlugins(list *claude.PluginList, workingDir string) []PluginState {
 
 	// Process available plugins
 	for _, p := range list.Available {
-		state := processAvailablePlugin(p, installedByID, allScopes, seenInstalled)
+		state := processAvailablePlugin(p, installedByID, allScopes, seenInstalled, workingDir)
 		byMarketplace[state.Marketplace] = append(byMarketplace[state.Marketplace], state)
 	}
 
-	// Process installed plugins not in available list
+	// Process installed plugins not in available list (includes plugins the CLI
+	// hides from the available array because they're installed somewhere).
 	for _, p := range list.Installed {
-		state, ok := processInstalledPlugin(p, allScopes, seenInstalled)
+		state, ok := processInstalledPlugin(p, allScopes, seenInstalled, workingDir)
 		if ok {
 			byMarketplace[state.Marketplace] = append(byMarketplace[state.Marketplace], state)
 		}
@@ -422,6 +423,20 @@ func mergePlugins(list *claude.PluginList, workingDir string) []PluginState {
 	return sortAndGroupByMarketplace(byMarketplace)
 }
 
+// isInstalledInProject reports whether an installed plugin belongs to the
+// current project context: user-scoped (global), matching projectPath, or
+// present in the project's settings files.
+func isInstalledInProject(p claude.InstalledPlugin, workingDir string, allScopes claude.ScopeState) bool {
+	if p.Scope == claude.ScopeUser {
+		return true
+	}
+	if p.ProjectPath == workingDir {
+		return true
+	}
+	_, inSettings := allScopes[p.ID]
+	return inSettings
+}
+
 // buildInstalledByID creates a map of installed plugins by ID.
 func buildInstalledByID(installed []claude.InstalledPlugin) map[string]claude.InstalledPlugin {
 	result := make(map[string]claude.InstalledPlugin)
@@ -431,14 +446,17 @@ func buildInstalledByID(installed []claude.InstalledPlugin) map[string]claude.In
 	return result
 }
 
-// processAvailablePlugin processes an available plugin and merges with installed data.
-func processAvailablePlugin(p claude.AvailablePlugin, installedByID map[string]claude.InstalledPlugin, allScopes claude.ScopeState, seenInstalled map[string]bool) PluginState {
+// processAvailablePlugin processes an available plugin and merges with installed data
+// only if the plugin is installed in the current project.
+func processAvailablePlugin(p claude.AvailablePlugin, installedByID map[string]claude.InstalledPlugin, allScopes claude.ScopeState, seenInstalled map[string]bool, workingDir string) PluginState {
 	state := PluginStateFromAvailable(p)
 	state.AvailableVersion = p.Version
 
 	if installed, ok := installedByID[p.PluginID]; ok {
-		mergeInstalledInfo(&state, installed, p.Version)
 		seenInstalled[p.PluginID] = true
+		if isInstalledInProject(installed, workingDir, allScopes) {
+			mergeInstalledInfo(&state, installed, p.Version)
+		}
 	}
 
 	// Apply scope data from settings files
@@ -470,28 +488,45 @@ func mergeInstalledInfo(state *PluginState, installed claude.InstalledPlugin, av
 	}
 }
 
-// processInstalledPlugin processes an installed plugin not in the available list.
-// Returns the state and true if it should be included, false otherwise.
-func processInstalledPlugin(p claude.InstalledPlugin, allScopes claude.ScopeState, seenInstalled map[string]bool) (PluginState, bool) {
-	// Include if plugin appears in any settings file OR is user-scoped in CLI output
-	_, inSettings := allScopes[p.ID]
-	isRelevant := p.Scope == claude.ScopeUser || inSettings
-
-	if !isRelevant || seenInstalled[p.ID] {
+// processInstalledPlugin processes an installed plugin not already handled by
+// processAvailablePlugin. Plugins installed in the current project are shown
+// with full state; plugins only installed elsewhere appear without install state
+// (the CLI hides these from the available array, so this is the only way they
+// show up).
+func processInstalledPlugin(p claude.InstalledPlugin, allScopes claude.ScopeState, seenInstalled map[string]bool, workingDir string) (PluginState, bool) {
+	// Skip duplicates (CLI can return the same plugin multiple times)
+	if seenInstalled[p.ID] {
 		return PluginState{}, false
 	}
-
 	seenInstalled[p.ID] = true
-	state := PluginStateFromInstalled(p)
 
-	// Apply scope data from settings files
-	if scopes, ok := allScopes[p.ID]; ok {
-		state.InstalledScopes = scopes
-	} else if p.Scope == claude.ScopeUser {
-		// User-scoped plugin not in settings — CLI is authority
-		state.InstalledScopes = map[claude.Scope]bool{claude.ScopeUser: true}
+	if isInstalledInProject(p, workingDir, allScopes) {
+		state := PluginStateFromInstalled(p)
+		if scopes, ok := allScopes[p.ID]; ok {
+			state.InstalledScopes = scopes
+		} else if p.Scope == claude.ScopeUser {
+			state.InstalledScopes = map[claude.Scope]bool{claude.ScopeUser: true}
+		}
+		return state, true
 	}
 
+	// Installed elsewhere — show without install state so the user can install
+	// it in the current project. Read cached manifest for description/metadata.
+	name, marketplace := parsePluginID(p.ID)
+	state := PluginState{
+		ID:              p.ID,
+		Name:            name,
+		Marketplace:     marketplace,
+		InstalledScopes: map[claude.Scope]bool{},
+	}
+	if p.InstallPath != "" {
+		if manifest, err := claude.ReadPluginManifest(p.InstallPath); err == nil {
+			state.Description = manifest.Description
+			state.AuthorName = manifest.AuthorName
+			state.AuthorEmail = manifest.AuthorEmail
+		}
+		state.Components = claude.ScanPluginComponents(p.InstallPath)
+	}
 	return state, true
 }
 
diff --git a/internal/tui/model_test.go b/internal/tui/model_test.go
index d778444..e77633b 100644
--- a/internal/tui/model_test.go
+++ b/internal/tui/model_test.go
@@ -2548,3 +2548,190 @@ func TestRenderPendingIndicator_MultiScopeInstall(t *testing.T) {
 		t.Errorf("renderPendingIndicator(multi-scope install) should contain 'LOCAL': %q", result)
 	}
 }
+
+func TestIsInstalledInProject(t *testing.T) {
+	allScopes := claude.ScopeState{
+		"in-settings@mp": {claude.ScopeProject: true},
+	}
+	workingDir := "/my/project"
+
+	tests := []struct {
+		name string
+		p    claude.InstalledPlugin
+		want bool
+	}{
+		{
+			name: "user scope is always relevant",
+			p:    claude.InstalledPlugin{ID: "foo@mp", Scope: claude.ScopeUser},
+			want: true,
+		},
+		{
+			name: "project scope matching workingDir",
+			p:    claude.InstalledPlugin{ID: "bar@mp", Scope: claude.ScopeProject, ProjectPath: "/my/project"},
+			want: true,
+		},
+		{
+			name: "project scope different workingDir",
+			p:    claude.InstalledPlugin{ID: "baz@mp", Scope: claude.ScopeProject, ProjectPath: "/other/project"},
+			want: false,
+		},
+		{
+			name: "plugin in settings files",
+			p:    claude.InstalledPlugin{ID: "in-settings@mp", Scope: claude.ScopeProject, ProjectPath: "/other/project"},
+			want: true,
+		},
+		{
+			name: "local scope different workingDir",
+			p:    claude.InstalledPlugin{ID: "qux@mp", Scope: claude.ScopeLocal, ProjectPath: "/other/project"},
+			want: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := isInstalledInProject(tt.p, workingDir, allScopes)
+			if got != tt.want {
+				t.Errorf("isInstalledInProject() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestMergePluginsCurrentProjectInstalled(t *testing.T) {
+	// Plugin installed at project scope in the current project should show as installed
+	list := &claude.PluginList{
+		Installed: []claude.InstalledPlugin{
+			{ID: "local-plugin@mp", Version: "1.0.0", Scope: claude.ScopeProject, ProjectPath: "/my/project", Enabled: true},
+		},
+	}
+
+	plugins := mergePlugins(list, "/my/project")
+
+	// Find the plugin (skip group headers)
+	var found *PluginState
+	for i := range plugins {
+		if plugins[i].ID == "local-plugin@mp" {
+			found = &plugins[i]
+			break
+		}
+	}
+	if found == nil {
+		t.Fatal("plugin installed in current project should appear in list")
+	}
+	if !found.IsInstalled() {
+		t.Error("plugin should show as installed in current project")
+	}
+	if !found.Enabled {
+		t.Error("plugin should show as enabled")
+	}
+}
+
+func TestMergePluginsOtherProjectNotInstalled(t *testing.T) {
+	// Plugin installed at project scope in ANOTHER project should show without install state
+	list := &claude.PluginList{
+		Installed: []claude.InstalledPlugin{
+			{ID: "remote-plugin@mp", Version: "2.0.0", Scope: claude.ScopeProject, ProjectPath: "/other/project", Enabled: false},
+		},
+	}
+
+	plugins := mergePlugins(list, "/my/project")
+
+	var found *PluginState
+	for i := range plugins {
+		if plugins[i].ID == "remote-plugin@mp" {
+			found = &plugins[i]
+			break
+		}
+	}
+	if found == nil {
+		t.Fatal("plugin installed elsewhere should still appear in list")
+	}
+	if found.IsInstalled() {
+		t.Error("plugin from another project should NOT show as installed")
+	}
+	if found.Version != "" {
+		t.Errorf("plugin from another project should have no version, got %q", found.Version)
+	}
+}
+
+func TestMergePluginsUserScopeAlwaysInstalled(t *testing.T) {
+	// User-scoped plugins should always show as installed
+	list := &claude.PluginList{
+		Installed: []claude.InstalledPlugin{
+			{ID: "global-plugin@mp", Version: "3.0.0", Scope: claude.ScopeUser, Enabled: true},
+		},
+	}
+
+	plugins := mergePlugins(list, "/any/project")
+
+	var found *PluginState
+	for i := range plugins {
+		if plugins[i].ID == "global-plugin@mp" {
+			found = &plugins[i]
+			break
+		}
+	}
+	if found == nil {
+		t.Fatal("user-scoped plugin should appear in list")
+	}
+	if !found.IsInstalled() {
+		t.Error("user-scoped plugin should show as installed")
+	}
+	if !found.Enabled {
+		t.Error("user-scoped plugin should show as enabled")
+	}
+}
+
+func TestMergePluginsAvailableNotMergedFromOtherProject(t *testing.T) {
+	// An available plugin that's installed in another project should NOT show
+	// as installed in the current project.
+	list := &claude.PluginList{
+		Available: []claude.AvailablePlugin{
+			{PluginID: "shared@mp", Name: "shared", Description: "a shared plugin", MarketplaceName: "mp"},
+		},
+		Installed: []claude.InstalledPlugin{
+			{ID: "shared@mp", Version: "1.0.0", Scope: claude.ScopeProject, ProjectPath: "/other/project", Enabled: false},
+		},
+	}
+
+	plugins := mergePlugins(list, "/my/project")
+
+	var found *PluginState
+	for i := range plugins {
+		if plugins[i].ID == "shared@mp" {
+			found = &plugins[i]
+			break
+		}
+	}
+	if found == nil {
+		t.Fatal("available plugin should appear in list")
+	}
+	if found.IsInstalled() {
+		t.Error("available plugin installed elsewhere should NOT show as installed here")
+	}
+	if found.Description != "a shared plugin" {
+		t.Errorf("available plugin should keep its description, got %q", found.Description)
+	}
+}
+
+func TestMergePluginsDeduplicatesInstalledPlugins(t *testing.T) {
+	// CLI can return the same plugin ID multiple times; should only appear once
+	list := &claude.PluginList{
+		Installed: []claude.InstalledPlugin{
+			{ID: "dup@mp", Version: "1.0.0", Scope: claude.ScopeProject, ProjectPath: "/other/a"},
+			{ID: "dup@mp", Version: "1.0.0", Scope: claude.ScopeProject, ProjectPath: "/other/b"},
+		},
+	}
+
+	plugins := mergePlugins(list, "/my/project")
+
+	count := 0
+	for _, p := range plugins {
+		if p.ID == "dup@mp" {
+			count++
+		}
+	}
+	if count != 1 {
+		t.Errorf("duplicate plugin should appear once, got %d", count)
+	}
+}