diff --git a/memory-update.md b/memory-update.md
index e2f6a6b1..49815951 100644
--- a/memory-update.md
+++ b/memory-update.md
@@ -1060,3 +1060,69 @@
 - Updated control-center priorities:
   - keep Phase 5 TUI refresh completion ahead of semantic Phase A implementation
   - semantic index Phase A now explicit next-track deliverable after current UI slice.
+
+# Memory Update (2026-03-02)
+
+## TUI v2 Phase 5 tree navigation parity landed
+- Added explicit left-profile-tree keyboard navigation in `src/seedpass/tui_v2/app.py`:
+  - `Up` / `Down` for tree cursor movement
+  - `Ctrl+O` to open/switch the selected profile
+- Added palette command parity/discoverability:
+  - `profile-tree-next`, `profile-tree-prev`, `profile-tree-open`
+- Updated left panel rendering with cursor + active profile markers and refreshed tree state after profile add/remove/rename/switch.
+- Extended Textual interaction + matrix tests:
+  - `src/tests/test_tui_v2_textual_interactions.py`
+  - `src/tests/test_tui_v2_action_matrix.py`
+
+## Semantic index implementation started (Phase A/B baseline)
+- Added local derived semantic index core:
+  - `src/seedpass/core/semantic_index.py`
+  - profile-local `semantic_index/manifest.json` + `records.json`
+  - token-overlap retrieval baseline, with high-risk kinds excluded by default (e.g., `seed`, `managed_account`).
+- Added profile config flag and service wrappers:
+  - `semantic_index_enabled` default `false`
+  - `ConfigManager` + `ConfigService` getters/setters
+  - new `SemanticIndexService` in `src/seedpass/core/api.py`
+- Added CLI command group:
+  - `seedpass semantic status|enable|disable|build|rebuild|search`
+- Added API endpoints:
+  - `GET /api/v1/semantic/status`
+  - `POST /api/v1/semantic/build`
+  - `POST /api/v1/semantic/rebuild`
+  - `POST /api/v1/semantic/search`
+  - `POST /api/v1/semantic/config`
+- Updated capabilities discovery for semantic CLI/API surfaces.
+
+## Tests executed and passing
+- `poetry run pytest -q src/tests/test_tui_v2_textual_interactions.py src/tests/test_tui_v2_action_matrix.py src/tests/test_semantic_index.py src/tests/test_cli_semantic.py src/tests/test_api_new_endpoints.py` => `95 passed`
+- Expanded target including CLI capability coverage:
+  - `poetry run pytest -q src/tests/test_cli_semantic.py src/tests/test_api_new_endpoints.py src/tests/test_semantic_index.py src/tests/test_tui_v2_textual_interactions.py src/tests/test_tui_v2_action_matrix.py src/tests/test_typer_cli.py` => `149 passed`
+
+## Docs/control-plane updates
+- Updated semantic roadmap status/progress and phase checkboxes:
+  - `docs/semantic_vector_index_plan.md`
+- Updated unified prioritization doc with current state and next queue:
+  - `docs/dev_control_center.md`
+- Updated UI refresh plan to mark Phase 5 tree-navigation completion:
+  - `docs/tui_v2_ui_refresh_plan.md`
+
+## Committed + pushed
+- Branch: `beta`
+- Commit: `165e2db`
+- Message: `feat: add semantic index scaffolding, cli/api surfaces, and tui tree nav polish`
+
+## Recommended immediate next slice
+1. Implement semantic Phase C in both TUIs (status/build/search commands + visible semantic-state indicator in ribbon/settings).
+2. Add incremental semantic index updates on entry/tag/link mutation paths (avoid rebuild-only behavior).
+3. Add hybrid ranking mode contract (`keyword|hybrid|semantic`) across CLI/API/TUI with tests.
+
+## Memory Update (2026-03-02, semantic Phase C slice)
+- Wired semantic controls into TUI v2 palette and top ribbon semantic state (`SEM: off/stale/ready(n)/err/n/a`).
+- Added TUI v2 commands: `semantic-status`, `semantic-enable`, `semantic-disable`, `semantic-build`, `semantic-rebuild`, `semantic-search <query>`.
+- Wired semantic service bootstrap into CLI TUI launch path (`_prime_tui2_service` + `launch_tui2` factories).
+- Added legacy TUI Settings option `18. Semantic Index` with submenu for status/enable/disable/build/rebuild/search.
+- Added tests:
+  - `test_settings_menu.py` semantic submenu dispatch/search flow
+  - `test_tui_v2_textual_interactions.py` semantic command success/validation paths
+  - `test_tui_v2_action_matrix.py` semantic command matrix coverage
+- Validation run: `102 passed` across targeted settings/TUI/semantic/CLI suites.
diff --git a/src/main.py b/src/main.py
index 7a00430c..a737f6ba 100644
--- a/src/main.py
+++ b/src/main.py
@@ -21,6 +21,7 @@ from utils.color_scheme import color_text
 import importlib
 
 from seedpass.core.manager import PasswordManager, restore_backup_index
+from seedpass.core.api import SemanticIndexService
 from seedpass.core.errors import SeedPassError
 from nostr.client import NostrClient
 from seedpass.core.entry_types import EntryType
@@ -1112,6 +1113,121 @@ def handle_nostr_menu(password_manager: PasswordManager) -> None:
             pause()
 
 
+def handle_semantic_index_menu(password_manager: PasswordManager) -> None:
+    """Submenu for semantic index status/build/search controls."""
+    service = SemanticIndexService(password_manager)
+    while True:
+        fp, parent_fp, child_fp = getattr(
+            password_manager,
+            "header_fingerprint_args",
+            (getattr(password_manager, "current_fingerprint", None), None, None),
+        )
+        clear_header_with_notification(
+            password_manager,
+            fp,
+            "Main Menu > Settings > Semantic Index",
+            parent_fingerprint=parent_fp,
+            child_fingerprint=child_fp,
+        )
+        print(color_text("\nSemantic Index:", "menu"))
+        print(color_text("1. Show status", "menu"))
+        print(color_text("2. Enable", "menu"))
+        print(color_text("3. Disable", "menu"))
+        print(color_text("4. Build", "menu"))
+        print(color_text("5. Rebuild", "menu"))
+        print(color_text("6. Search", "menu"))
+        choice = input("Select an option or press Enter to go back: ").strip()
+        try:
+            if choice == "1":
+                payload = service.status()
+                print(
+                    colored(
+                        "Status: "
+                        f"enabled={bool(payload.get('enabled', False))}, "
+                        f"built={bool(payload.get('built', False))}, "
+                        f"records={int(payload.get('records', 0))}",
+                        "green",
+                    )
+                )
+                pause()
+            elif choice == "2":
+                payload = service.set_enabled(True)
+                print(
+                    colored(
+                        f"Semantic index enabled (records={int(payload.get('records', 0))}).",
+                        "green",
+                    )
+                )
+                pause()
+            elif choice == "3":
+                payload = service.set_enabled(False)
+                print(
+                    colored(
+                        f"Semantic index disabled (records={int(payload.get('records', 0))}).",
+                        "yellow",
+                    )
+                )
+                pause()
+            elif choice == "4":
+                payload = service.build()
+                print(
+                    colored(
+                        f"Semantic index built with {int(payload.get('records', 0))} records.",
+                        "green",
+                    )
+                )
+                pause()
+            elif choice == "5":
+                payload = service.rebuild()
+                print(
+                    colored(
+                        f"Semantic index rebuilt with {int(payload.get('records', 0))} records.",
+                        "green",
+                    )
+                )
+                pause()
+            elif choice == "6":
+                query = input("Enter semantic search query: ").strip()
+                if not query:
+                    print(colored("Search query required.", "yellow"))
+                    pause()
+                    continue
+                results = service.search(query, k=10, kind=None)
+                if not results:
+                    print(colored("No semantic matches found.", "yellow"))
+                    pause()
+                    continue
+                print(color_text("\nSemantic Matches:", "menu"))
+                for row in results:
+                    entry_id = int(row.get("entry_id", 0))
+                    kind = str(row.get("kind", ""))
+                    label = str(row.get("label", ""))
+                    score = float(row.get("score", 0.0))
+                    print(
+                        colored(
+                            f"- #{entry_id} [{kind}] {label} (score={score:.3f})",
+                            "cyan",
+                        )
+                    )
+                pause()
+            elif not choice:
+                break
+            else:
+                print(colored("Invalid choice.", "red"))
+        except PasswordPromptError as exc:
+            logging.warning("Semantic submenu action cancelled: %s", exc)
+            print(colored(f"Action cancelled: {exc}", "yellow"))
+            pause()
+        except SeedPassError as exc:
+            logging.error("Semantic submenu action failed: %s", exc, exc_info=True)
+            print(colored(f"Action failed: {exc}", "red"))
+            pause()
+        except Exception as exc:
+            logging.error("Semantic submenu action failed: %s", exc, exc_info=True)
+            print(colored(f"Semantic action failed: {exc}", "red"))
+            pause()
+
+
 def handle_settings(password_manager: PasswordManager) -> None:
     """Interactive settings menu with submenus for profiles and Nostr."""
     while True:
@@ -1145,6 +1261,7 @@ def handle_settings(password_manager: PasswordManager) -> None:
         print(color_text("15. Toggle Secret Mode", "menu"))
         print(color_text("16. Toggle Offline Mode (default ON)", "menu"))
         print(color_text("17. Toggle Quick Unlock", "menu"))
+        print(color_text("18. Semantic Index", "menu"))
         choice = input("Select an option or press Enter to go back: ").strip()
         try:
             if choice == "1":
@@ -1248,6 +1365,8 @@ def handle_settings(password_manager: PasswordManager) -> None:
             elif choice == "17":
                 handle_toggle_quick_unlock(password_manager)
                 pause()
+            elif choice == "18":
+                handle_semantic_index_menu(password_manager)
             elif not choice:
                 break
             else:
diff --git a/src/seedpass/cli/__init__.py b/src/seedpass/cli/__init__.py
index f783bdf0..9aaa81f6 100644
--- a/src/seedpass/cli/__init__.py
+++ b/src/seedpass/cli/__init__.py
@@ -96,6 +96,7 @@ def _prime_tui2_service(
             ProfileService,
             ConfigService,
             NostrService,
+            SemanticIndexService,
             SyncService,
             UtilityService,
             VaultService,
@@ -111,6 +112,7 @@ def _prime_tui2_service(
             "sync": SyncService(pm) if pm is not None else None,
             "utility": UtilityService(pm) if pm is not None else None,
             "vault": VaultService(pm) if pm is not None else None,
+            "semantic": SemanticIndexService(pm) if pm is not None else None,
         }, None
     except Exception as exc:  # pragma: no cover - defensive runtime path
         return None, exc
@@ -163,6 +165,7 @@ def main(
             sync_service_factory=lambda: services["sync"],
             utility_service_factory=lambda: services["utility"],
             vault_service_factory=lambda: services["vault"],
+            semantic_service_factory=lambda: services["semantic"],
         )
         if launched:
             return
@@ -225,6 +228,7 @@ def tui2(
         sync_service_factory=lambda: services["sync"],
         utility_service_factory=lambda: services["utility"],
         vault_service_factory=lambda: services["vault"],
+        semantic_service_factory=lambda: services["semantic"],
     )
     if launched:
         return
diff --git a/src/seedpass/tui_v2/app.py b/src/seedpass/tui_v2/app.py
index b163cbf1..6277a23c 100644
--- a/src/seedpass/tui_v2/app.py
+++ b/src/seedpass/tui_v2/app.py
@@ -95,6 +95,7 @@ def launch_tui2(
     sync_service_factory: Any | None = None,
     utility_service_factory: Any | None = None,
     vault_service_factory: Any | None = None,
+    semantic_service_factory: Any | None = None,
     app_hook: Any | None = None,
 ) -> bool:
     """Launch TUI v2 when runtime dependencies are available.
@@ -343,6 +344,7 @@ def launch_tui2(
                     "setting-secret <on|off> [delay] | setting-offline <on|off> | "
                     "setting-quick-unlock <on|off> | setting-timeout <seconds> | "
                     "setting-kdf-iterations <n> | setting-kdf-mode <mode> | "
+                    "semantic-status | semantic-enable | semantic-disable | semantic-build | semantic-rebuild | semantic-search <query> | "
                     "relay-list | relay-add <url> | relay-rm <index> | "
                     "relay-reset | npub | nostr-reset-sync-state | nostr-fresh-namespace | "
                     "sync-now | sync-bg | "
@@ -413,6 +415,8 @@ def launch_tui2(
             self._sync_service = None
             self._utility_service = None
             self._vault_service = None
+            self._semantic_service = None
+            self._semantic_state = "n/a"
             self._selected_entry_id: int | None = None
             self._selected_entry: dict[str, Any] | None = None
             self._last_query = ""
@@ -500,6 +504,16 @@ def launch_tui2(
             except Exception as exc:
                 self._vault_service = None
                 self._log_activity(f"Vault service unavailable: {exc}")
+            try:
+                self._semantic_service = (
+                    semantic_service_factory()
+                    if callable(semantic_service_factory)
+                    else None
+                )
+            except Exception as exc:
+                self._semantic_service = None
+                self._log_activity(f"Semantic service unavailable: {exc}")
+            self._refresh_semantic_state()
             self._update_filters_panel()
             self._update_help_overlay()
             self._update_activity_panel()
@@ -563,10 +577,33 @@ def launch_tui2(
                 f" | Archive: {self.archive_scope}"
                 f" | Session: {lock_state}"
                 f" | Density: {self._density_mode}"
+                f" | SEM: {self._semantic_state}"
                 f" | Last Sync: {self._last_sync_text}"
             )
             self.query_one("#top-ribbon", Static).update(text)
 
+        def _refresh_semantic_state(self) -> None:
+            if self._semantic_service is None:
+                self._semantic_state = "n/a"
+                return
+            status = getattr(self._semantic_service, "status", None)
+            if not callable(status):
+                self._semantic_state = "n/a"
+                return
+            try:
+                payload = status() or {}
+                enabled = bool(payload.get("enabled", False))
+                built = bool(payload.get("built", False))
+                records = int(payload.get("records", 0))
+                if not enabled:
+                    self._semantic_state = "off"
+                elif built:
+                    self._semantic_state = f"ready({records})"
+                else:
+                    self._semantic_state = "stale"
+            except Exception:
+                self._semantic_state = "err"
+
         def _refresh_profile_tree(self) -> None:
             profiles: list[str] = []
             if self._profile_service is not None:
@@ -668,6 +705,7 @@ def launch_tui2(
                 "Palette commands: help, help-commands, open, search, filter, "
                 "onboarding, quickstart, stats, session-status, lock/unlock, "
                 "density, profile-tree-next/prev/open, "
+                "semantic-status/build/rebuild/search, "
                 "archive, restore, archive-filter, edit-doc/save-doc/cancel-edit, "
                 "link-add/link-rm/link-filter/link-next/link-prev/link-open, "
                 "add-*, notes/tags/fields, 2fa-*, profile-*, setting-*, relay-*, "
@@ -698,6 +736,7 @@ def launch_tui2(
                     "2FA: 2fa-board | 2fa-hide | 2fa-refresh | 2fa-copy <entry_id>",
                     "Profiles: profiles-list | profile-switch | profile-add | profile-remove | profile-rename | profile-tree-next | profile-tree-prev | profile-tree-open",
                     "Settings: setting-secret | setting-offline | setting-quick-unlock | setting-timeout | setting-kdf-iterations | setting-kdf-mode",
+                    "Semantic: semantic-status | semantic-enable | semantic-disable | semantic-build | semantic-rebuild | semantic-search <query>",
                     "Nostr: relay-list | relay-add | relay-rm | relay-reset | npub | nostr-reset-sync-state | nostr-fresh-namespace",
                     "Sync/Utility: sync-now | sync-bg | checksum-verify | checksum-update | db-export | db-import | totp-export | parent-seed-backup",
                     "Sessions: managed-load [entry_id] | managed-exit | session-status | lock | unlock <password>",
@@ -3309,6 +3348,155 @@ def launch_tui2(
                     )
                 return
 
+            if cmd == "semantic-status":
+                if self._semantic_service is None:
+                    self._set_status("Semantic service unavailable")
+                    return
+                if args:
+                    self._set_status("Usage: semantic-status")
+                    return
+                status = getattr(self._semantic_service, "status", None)
+                if not callable(status):
+                    self._set_status("Semantic service does not support status")
+                    return
+                try:
+                    payload = status() or {}
+                    self._refresh_semantic_state()
+                    self._update_top_ribbon()
+                    self.query_one("#entry-detail", Static).update(
+                        "Semantic Index Status\n---------------------\n\n"
+                        + json.dumps(payload, indent=2, sort_keys=True)
+                    )
+                    self._clear_failure()
+                    self._set_status("Displayed semantic index status")
+                except Exception as exc:
+                    self._record_failure(
+                        "semantic-status failed",
+                        exc,
+                        retry=lambda: self._run_palette_command(raw),
+                        hint="Press 'x' to retry.",
+                    )
+                return
+
+            if cmd in {"semantic-enable", "semantic-disable"}:
+                if self._semantic_service is None:
+                    self._set_status("Semantic service unavailable")
+                    return
+                if args:
+                    self._set_status(f"Usage: {cmd}")
+                    return
+                setter = getattr(self._semantic_service, "set_enabled", None)
+                if not callable(setter):
+                    self._set_status("Semantic service does not support enable/disable")
+                    return
+                try:
+                    enabled = cmd == "semantic-enable"
+                    payload = setter(enabled) or {}
+                    self._refresh_semantic_state()
+                    self._update_top_ribbon()
+                    self._clear_failure()
+                    self._set_status(
+                        "Semantic index "
+                        + ("enabled" if enabled else "disabled")
+                        + f" (records={int(payload.get('records', 0))})"
+                    )
+                except Exception as exc:
+                    self._record_failure(
+                        f"{cmd} failed",
+                        exc,
+                        retry=lambda: self._run_palette_command(raw),
+                        hint="Press 'x' to retry.",
+                    )
+                return
+
+            if cmd in {"semantic-build", "semantic-rebuild"}:
+                if self._semantic_service is None:
+                    self._set_status("Semantic service unavailable")
+                    return
+                if args:
+                    self._set_status(f"Usage: {cmd}")
+                    return
+                runner = getattr(
+                    self._semantic_service,
+                    "rebuild" if cmd == "semantic-rebuild" else "build",
+                    None,
+                )
+                if not callable(runner):
+                    self._set_status("Semantic service does not support build/rebuild")
+                    return
+                try:
+                    payload = runner() or {}
+                    self._refresh_semantic_state()
+                    self._update_top_ribbon()
+                    self._clear_failure()
+                    verb = "rebuilt" if cmd == "semantic-rebuild" else "built"
+                    self._set_status(
+                        f"Semantic index {verb} (records={int(payload.get('records', 0))})"
+                    )
+                except Exception as exc:
+                    self._record_failure(
+                        f"{cmd} failed",
+                        exc,
+                        retry=lambda: self._run_palette_command(raw),
+                        hint="Press 'x' to retry.",
+                    )
+                return
+
+            if cmd == "semantic-search":
+                if self._semantic_service is None:
+                    self._set_status("Semantic service unavailable")
+                    return
+                if not args:
+                    self._set_status("Usage: semantic-search <query>")
+                    return
+                searcher = getattr(self._semantic_service, "search", None)
+                if not callable(searcher):
+                    self._set_status("Semantic service does not support search")
+                    return
+                query = " ".join(args).strip()
+                if not query:
+                    self._set_status("Usage: semantic-search <query>")
+                    return
+                try:
+                    results = list(searcher(query, k=10, kind=None) or [])
+                    self._refresh_semantic_state()
+                    self._update_top_ribbon()
+                    lines = [
+                        f"Semantic Search: {query}",
+                        "---------------------------",
+                        "",
+                    ]
+                    if not results:
+                        lines.append("No semantic matches.")
+                    else:
+                        for row in results[:10]:
+                            entry_id = int(row.get("entry_id", 0))
+                            kind = str(row.get("kind", ""))
+                            label = str(row.get("label", ""))
+                            score = float(row.get("score", 0.0))
+                            excerpt = str(row.get("excerpt", ""))
+                            lines.append(
+                                f"- #{entry_id} [{kind}] {label} (score={score:.3f})"
+                            )
+                            if excerpt:
+                                short = (
+                                    excerpt
+                                    if len(excerpt) <= 120
+                                    else excerpt[:117] + "..."
+                                )
+                                lines.append(f"  {short}")
+                    self.query_one("#entry-detail", Static).update("\n".join(lines))
+                    self._clear_failure()
+                    self._set_status(f"Semantic matches: {len(results)} for '{query}'")
+                except Exception as exc:
+                    self._record_failure(
+                        "semantic-search failed",
+                        exc,
+                        retry=lambda: self._run_palette_command(raw),
+                        hint="Press 'x' to retry.",
+                    )
+                return
+
             if cmd == "relay-list":
                 if self._nostr_service is None:
                     self._set_status("Nostr service unavailable")
diff --git a/src/tests/test_settings_menu.py b/src/tests/test_settings_menu.py
index 482c7cfc..25d3ae90 100644
--- a/src/tests/test_settings_menu.py
+++ b/src/tests/test_settings_menu.py
@@ -358,3 +358,51 @@ def test_nostr_menu_dispatches_fresh_namespace(monkeypatch):
             with patch("builtins.input", side_effect=lambda *_: next(inputs)):
                 main.handle_nostr_menu(pm)
         handler.assert_called_once_with(pm)
+
+
+def test_settings_menu_dispatches_semantic_submenu(monkeypatch):
+    with TemporaryDirectory() as tmpdir:
+        tmp_path = Path(tmpdir)
+        pm, _, _ = setup_pm(tmp_path, monkeypatch)
+        inputs = iter(["18", ""])
+        with patch("main.handle_semantic_index_menu") as handler:
+            with patch("builtins.input", side_effect=lambda *_: next(inputs)):
+                main.handle_settings(pm)
+        handler.assert_called_once_with(pm)
+
+
+def test_semantic_submenu_search_flow(monkeypatch, capsys):
+    class DummySemanticService:
+        def __init__(self, _pm):
+            self.last_query = None
+
+        def status(self):
+            return {"enabled": False, "built": False, "records": 0}
+
+        def set_enabled(self, enabled: bool):
+            return {"enabled": bool(enabled), "records": 0}
+
+        def build(self):
+            return {"enabled": True, "built": True, "records": 2}
+
+        def rebuild(self):
+            return {"enabled": True, "built": True, "records": 2}
+
+        def search(self, query: str, *, k: int = 10, kind: str | None = None):
+            self.last_query = query
+            return [{"entry_id": 1, "kind": "document", "label": "Doc", "score": 0.5}]
+
+    with TemporaryDirectory() as tmpdir:
+        tmp_path = Path(tmpdir)
+        pm, _, _ = setup_pm(tmp_path, monkeypatch)
+        monkeypatch.setattr(main, "SemanticIndexService", DummySemanticService)
+        monkeypatch.setattr(main, "pause", lambda: None)
+        inputs = iter(["1", "2", "4", "6", "relay docs", ""])
+        with patch("builtins.input", side_effect=lambda *_: next(inputs)):
+            main.handle_semantic_index_menu(pm)
+        out = capsys.readouterr().out
+        assert "Status: enabled=False, built=False, records=0" in out
+        assert "Semantic index enabled" in out
+        assert "Semantic index built with 2 records" in out
+        assert "Semantic Matches:" in out
+        assert "#1 [document] Doc" in out
diff --git a/src/tests/test_tui_v2_action_matrix.py b/src/tests/test_tui_v2_action_matrix.py
index 9aea85e5..5a2dee6d 100644
--- a/src/tests/test_tui_v2_action_matrix.py
+++ b/src/tests/test_tui_v2_action_matrix.py
@@ -560,6 +560,12 @@ async def test_tui2_matrix_actions_palette_events_and_guards() -> None:
         app._run_palette_command("setting-timeout 300")
         app._run_palette_command("setting-kdf-iterations 100000")
         app._run_palette_command("setting-kdf-mode pbkdf2")
+        app._run_palette_command("semantic-status")
+        app._run_palette_command("semantic-enable now")
+        app._run_palette_command("semantic-disable now")
+        app._run_palette_command("semantic-build now")
+        app._run_palette_command("semantic-rebuild now")
+        app._run_palette_command("semantic-search")
         app._run_palette_command("relay-list")
         app._run_palette_command("npub")
         app._run_palette_command("relay-add wss://relay.example")
@@ -601,6 +607,8 @@ async def test_tui2_matrix_actions_palette_events_and_guards() -> None:
         app._run_palette_command("lock")
         app._run_palette_command("unlock hunter2")
         app._run_palette_command("search Doc")
+        app._run_palette_command("semantic-status")
+        app._run_palette_command("semantic-search notes")
         app.action_focus_left()
         app._run_palette_command("profile-tree-next")
         app._run_palette_command("profile-tree-prev")
diff --git a/src/tests/test_tui_v2_textual_interactions.py b/src/tests/test_tui_v2_textual_interactions.py
index cffdd2ce..29b2e38b 100644
--- a/src/tests/test_tui_v2_textual_interactions.py
+++ b/src/tests/test_tui_v2_textual_interactions.py
@@ -562,6 +562,49 @@ class FakeVaultService:
         return _Resp()
 
 
+class FakeSemanticService:
+    def __init__(self) -> None:
+        self.enabled = False
+        self.built = False
+        self.records = 0
+        self.last_query: str | None = None
+
+    def status(self):
+        return {
+            "enabled": bool(self.enabled),
+            "built": bool(self.built),
+            "records": int(self.records),
+        }
+
+    def set_enabled(self, enabled: bool):
+        self.enabled = bool(enabled)
+        return self.status()
+
+    def build(self):
+        self.built = True
+        self.records = 2
+        return self.status()
+
+    def rebuild(self):
+        self.built = True
+        self.records = 2
+        return self.status()
+
+    def search(self, query: str, *, k: int = 10, kind: str | None = None):
+        self.last_query = str(query)
+        if not query.strip():
+            return []
+        return [
+            {
+                "entry_id": 1,
+                "kind": kind or "document",
+                "label": "Doc",
+                "score": 0.7,
+                "excerpt": f"query={query} k={k}",
+            }
+        ]
+
+
 def _build_app(
     service: FakeEntryService,
     *,
@@ -571,6 +614,7 @@ def _build_app(
     sync_service=None,
     utility_service=None,
     vault_service=None,
+    semantic_service=None,
 ):
     holder: dict[str, object] = {}
 
@@ -597,6 +641,9 @@ def _build_app(
         vault_service_factory=(
             (lambda: vault_service) if vault_service is not None else None
         ),
+        semantic_service_factory=(
+            (lambda: semantic_service) if semantic_service is not None else None
+        ),
         app_hook=_hook,
     )
     assert launched is True
@@ -1547,6 +1594,7 @@ async def test_tui2_textual_profiles_and_settings_palette_commands() -> None:
     sync = FakeSyncService()
     utility = FakeUtilityService()
     vault = FakeVaultService()
+    semantic = FakeSemanticService()
     app = _build_app(
         service,
         profile_service=profiles,
@@ -1555,6 +1603,7 @@ async def test_tui2_textual_profiles_and_settings_palette_commands() -> None:
         sync_service=sync,
         utility_service=utility,
         vault_service=vault,
+        semantic_service=semantic,
     )
 
     async with app.run_test() as pilot:
@@ -1611,6 +1660,34 @@ async def test_tui2_textual_profiles_and_settings_palette_commands() -> None:
         assert config.kdf_mode == "argon2"
         assert "KDF mode set to argon2" in _status_text(app)
 
+        app._run_palette_command("semantic-status")
+        await pilot.pause()
+        assert "Displayed semantic index status" in _status_text(app)
+
+        app._run_palette_command("semantic-enable")
+        await pilot.pause()
+        assert semantic.enabled is True
+        assert "Semantic index enabled" in _status_text(app)
+
+        app._run_palette_command("semantic-build")
+        await pilot.pause()
+        assert semantic.built is True
+        assert "Semantic index built" in _status_text(app)
+
+        app._run_palette_command("semantic-search relay recovery")
+        await pilot.pause()
+        assert semantic.last_query == "relay recovery"
+        assert "Semantic matches: 1 for 'relay recovery'" in _status_text(app)
+
+        app._run_palette_command("semantic-rebuild")
+        await pilot.pause()
+        assert "Semantic index rebuilt" in _status_text(app)
+
+        app._run_palette_command("semantic-disable")
+        await pilot.pause()
+        assert semantic.enabled is False
+        assert "Semantic index disabled" in _status_text(app)
+
         app._run_palette_command("profile-add")
         await pilot.pause()
         assert "Created profile fp-new-1" in _status_text(app)
@@ -1763,6 +1840,10 @@ async def test_tui2_textual_profiles_and_settings_palette_validation() -> None:
         await pilot.pause()
         assert "Utility service unavailable" in _status_text(app)
 
+        app._run_palette_command("semantic-status")
+        await pilot.pause()
+        assert "Semantic service unavailable" in _status_text(app)
+
         app._run_palette_command("db-export /tmp/x")
         await pilot.pause()
         assert "Vault service unavailable" in _status_text(app)
@@ -1831,6 +1912,14 @@ async def test_tui2_textual_profiles_and_settings_palette_validation() -> None:
         await pilot.pause()
         assert "Nostr service unavailable" in _status_text(app)
 
+        app._run_palette_command("semantic-enable now")
+        await pilot.pause()
+        assert "Semantic service unavailable" in _status_text(app)
+
+        app._run_palette_command("semantic-search")
+        await pilot.pause()
+        assert "Semantic service unavailable" in _status_text(app)
+
         app._run_palette_command("npub")
         await pilot.pause()
         assert "Nostr service unavailable" in _status_text(app)
@@ -1855,6 +1944,7 @@ async def test_tui2_textual_profiles_and_settings_palette_validation() -> None:
     vault = FakeVaultService()
     nostr = FakeNostrService(["wss://r1"])
     sync = FakeSyncService()
+    semantic = FakeSemanticService()
     app = _build_app(
         service,
         profile_service=profiles,
@@ -1863,6 +1953,7 @@ async def test_tui2_textual_profiles_and_settings_palette_validation() -> None:
         vault_service=vault,
         nostr_service=nostr,
         sync_service=sync,
+        semantic_service=semantic,
     )
     async with app.run_test() as pilot:
         await pilot.pause()
@@ -1879,6 +1970,14 @@ async def test_tui2_textual_profiles_and_settings_palette_validation() -> None:
         await pilot.pause()
         assert "Usage: setting-kdf-mode <mode>" in _status_text(app)
 
+        app._run_palette_command("semantic-enable now")
+        await pilot.pause()
+        assert "Usage: semantic-enable" in _status_text(app)
+
+        app._run_palette_command("semantic-search")
+        await pilot.pause()
+        assert "Usage: semantic-search <query>" in _status_text(app)
+
         app._run_palette_command("checksum-update nope")
         await pilot.pause()
         assert "Usage: checksum-update" in _status_text(app)