diff --git a/backend/src/apis/app_api/admin/roles/routes.py b/backend/src/apis/app_api/admin/roles/routes.py
index 907740b4e..e2ae786f0 100644
--- a/backend/src/apis/app_api/admin/roles/routes.py
+++ b/backend/src/apis/app_api/admin/roles/routes.py
@@ -13,7 +13,10 @@
 from fastapi import APIRouter, Depends, HTTPException, status, Query
 
 from apis.shared.auth import User, require_admin
+from apis.shared.rbac.admin_scopes import ADMIN_SCOPES
 from apis.shared.rbac.models import (
+    AdminScopeListResponse,
+    AdminScopeResponse,
     AppRoleCreate,
     AppRoleUpdate,
     AppRoleResponse,
@@ -58,6 +61,43 @@ async def list_roles(
     )
 
 
+# ⚠️ Must stay ABOVE `/{role_id}`. FastAPI matches in declaration order, and
+# `/{role_id}` is a single-segment catch-all — declared first, it would swallow
+# `/admin-scopes` and return a 404 for a role literally named "admin-scopes".
+# (`/cache/stats` below is safe only because it has two segments.)
+@router.get("/admin-scopes", response_model=AdminScopeListResponse)
+async def list_admin_scopes(
+    admin: User = Depends(require_admin),
+):
+    """
+    List the delegated admin scope registry.
+
+    Feeds the role form's scope picker. The registry is closed and defined in
+    code (`apis/shared/rbac/admin_scopes.py`) rather than derived from a
+    catalog — the roles UI has no free-text entry, so a grantable id that
+    isn't served here cannot be granted at all.
+
+    Non-delegable scopes are included with `delegable: false` so the picker can
+    show them as unavailable rather than silently omitting them.
+
+    Requires full admin: granting admin scopes is a `system_admin`-only act,
+    and this router is non-delegable for exactly that reason.
+    """
+    return AdminScopeListResponse(
+        scopes=[
+            AdminScopeResponse(
+                id=scope.id,
+                label=scope.label,
+                group=scope.group,
+                description=scope.description,
+                delegable=scope.delegable,
+            )
+            for scope in ADMIN_SCOPES
+        ],
+        total=len(ADMIN_SCOPES),
+    )
+
+
 @router.get("/{role_id}", response_model=AppRoleResponse)
 async def get_role(
     role_id: str,
diff --git a/backend/src/apis/app_api/users/models.py b/backend/src/apis/app_api/users/models.py
index 7051a0f19..6e4188ef2 100644
--- a/backend/src/apis/app_api/users/models.py
+++ b/backend/src/apis/app_api/users/models.py
@@ -30,6 +30,16 @@ class UserPermissionsResponse(BaseModel):
     app_roles: List[str] = Field(..., alias="appRoles", description="Resolved application roles")
     tools: List[str] = Field(..., description="Accessible tool IDs")
     models: List[str] = Field(..., description="Accessible model IDs")
+    # `skills` predates admin scopes and was carried by UserEffectivePermissions
+    # for months without ever reaching this response — the field-added-to-model,
+    # forgotten-in-the-response-shape bug. Both default to [] so a client on an
+    # older build is unaffected.
+    skills: List[str] = Field(default_factory=list, description="Accessible skill IDs")
+    admin_scopes: List[str] = Field(
+        default_factory=list,
+        alias="adminScopes",
+        description="Delegated admin feature areas granted to this user",
+    )
     quota_tier: Optional[str] = Field(None, alias="quotaTier", description="Assigned quota tier")
     resolved_at: str = Field(..., alias="resolvedAt", description="ISO timestamp of resolution")
 
diff --git a/backend/src/apis/app_api/users/routes.py b/backend/src/apis/app_api/users/routes.py
index 35d87fafd..6d2698b73 100644
--- a/backend/src/apis/app_api/users/routes.py
+++ b/backend/src/apis/app_api/users/routes.py
@@ -39,6 +39,8 @@ async def get_my_permissions(
             app_roles=permissions.app_roles,
             tools=permissions.tools,
             models=permissions.models,
+            skills=permissions.skills,
+            admin_scopes=permissions.admin_scopes,
             quota_tier=permissions.quota_tier,
             resolved_at=permissions.resolved_at,
         )
diff --git a/backend/src/apis/shared/rbac/models.py b/backend/src/apis/shared/rbac/models.py
index 7abd291e2..e7ff6f972 100644
--- a/backend/src/apis/shared/rbac/models.py
+++ b/backend/src/apis/shared/rbac/models.py
@@ -288,6 +288,32 @@ class AppRoleListResponse(BaseModel):
     total: int
 
 
+class AdminScopeResponse(BaseModel):
+    """One entry from the delegated admin scope registry."""
+
+    id: str
+    label: str
+    group: str
+    description: str
+    delegable: bool
+
+    model_config = {"populate_by_name": True}
+
+
+class AdminScopeListResponse(BaseModel):
+    """The admin scope registry, for building the role form's scope picker.
+
+    Non-delegable scopes are included rather than filtered out: the picker
+    should *show* that `admin.roles` and `admin.auth_providers` exist and
+    explain that they cannot be granted, instead of leaving an admin wondering
+    why those two areas are missing. The client renders them disabled; the
+    server rejects them regardless (`validate_admin_scopes`).
+    """
+
+    scopes: List[AdminScopeResponse]
+    total: int
+
+
 class CacheStatsResponse(BaseModel):
     """Cache statistics response."""
 
diff --git a/backend/tests/rbac/test_admin_scopes_api.py b/backend/tests/rbac/test_admin_scopes_api.py
new file mode 100644
index 000000000..0d8a3ac6b
--- /dev/null
+++ b/backend/tests/rbac/test_admin_scopes_api.py
@@ -0,0 +1,187 @@
+"""API surface for delegated admin scopes.
+
+PR-3 of ``docs/specs/granular-admin-permissions.md``: the registry endpoint that
+feeds the role form's scope picker, and ``adminScopes`` on the permissions
+endpoint the SPA already calls.
+"""
+
+from __future__ import annotations
+
+from unittest.mock import AsyncMock, patch
+
+import pytest
+from fastapi import FastAPI
+from fastapi.testclient import TestClient
+
+from apis.app_api.admin.roles.routes import router as roles_router
+from apis.app_api.users.routes import router as users_router
+from apis.shared.auth import require_admin
+from apis.shared.auth.dependencies import get_current_user_from_session
+from apis.shared.auth.models import User
+from apis.shared.rbac.admin_scopes import (
+    ADMIN_SCOPES,
+    NON_DELEGABLE_SCOPES,
+)
+from apis.shared.rbac.models import UserEffectivePermissions
+from tests.conftest import override_admin_auth
+
+
+def _user() -> User:
+    return User(
+        email="admin@example.com",
+        user_id="admin-1",
+        name="Admin",
+        roles=["system_admin"],
+    )
+
+
+# ---------------------------------------------------------------------------
+# GET /admin/roles/admin-scopes
+# ---------------------------------------------------------------------------
+
+
+@pytest.fixture
+def roles_client() -> TestClient:
+    app = FastAPI()
+    app.include_router(roles_router, prefix="/admin")
+    override_admin_auth(app, _user)
+    return TestClient(app)
+
+
+def test_registry_lists_every_scope(roles_client) -> None:
+    resp = roles_client.get("/admin/roles/admin-scopes")
+
+    assert resp.status_code == 200
+    body = resp.json()
+    assert body["total"] == len(ADMIN_SCOPES)
+    assert {s["id"] for s in body["scopes"]} == {s.id for s in ADMIN_SCOPES}
+
+
+def test_registry_marks_non_delegable_scopes(roles_client) -> None:
+    """The picker needs to *show* these as unavailable, not omit them."""
+    body = roles_client.get("/admin/roles/admin-scopes").json()
+
+    not_delegable = {s["id"] for s in body["scopes"] if not s["delegable"]}
+    assert not_delegable == set(NON_DELEGABLE_SCOPES)
+
+
+def test_registry_entries_carry_display_metadata(roles_client) -> None:
+    body = roles_client.get("/admin/roles/admin-scopes").json()
+
+    for scope in body["scopes"]:
+        assert scope["label"].strip(), scope["id"]
+        assert scope["group"].strip(), scope["id"]
+        assert scope["description"].strip(), scope["id"]
+
+
+def test_registry_route_is_not_shadowed_by_the_role_id_route() -> None:
+    """`/admin-scopes` must be declared before `/{role_id}`.
+
+    Single-segment literal paths lose to a single-segment path parameter
+    whenever the parameter is declared first, and the symptom is a confusing
+    404 (or a lookup for a role named "admin-scopes") rather than an error at
+    import time. Asserted on the router's declaration order so a future edit
+    that moves the handler fails here instead of in production.
+    """
+    paths = [getattr(r, "path", "") for r in roles_router.routes]
+
+    assert "/roles/admin-scopes" in paths
+    assert paths.index("/roles/admin-scopes") < paths.index("/roles/{role_id}")
+
+
+def test_registry_requires_full_admin() -> None:
+    """Granting scopes is system_admin-only, so reading the registry is too."""
+    app = FastAPI()
+    app.include_router(roles_router, prefix="/admin")
+
+    def _deny():
+        from fastapi import HTTPException
+
+        raise HTTPException(status_code=403, detail="Access denied.")
+
+    app.dependency_overrides[require_admin] = _deny
+
+    resp = TestClient(app).get("/admin/roles/admin-scopes")
+    assert resp.status_code == 403
+
+
+# ---------------------------------------------------------------------------
+# GET /users/me/permissions
+# ---------------------------------------------------------------------------
+
+
+def _permissions(**kwargs) -> UserEffectivePermissions:
+    defaults = dict(
+        user_id="u-1",
+        app_roles=["content_admin"],
+        tools=["tool_a"],
+        models=["model_a"],
+        quota_tier="standard",
+        resolved_at="2026-07-27T00:00:00Z",
+        skills=["skill_a"],
+        admin_scopes=["admin.skills"],
+    )
+    defaults.update(kwargs)
+    return UserEffectivePermissions(**defaults)
+
+
+def _users_client(permissions: UserEffectivePermissions) -> TestClient:
+    app = FastAPI()
+    app.include_router(users_router)
+    app.dependency_overrides[get_current_user_from_session] = _user
+
+    service = AsyncMock()
+    service.resolve_user_permissions = AsyncMock(return_value=permissions)
+    patcher = patch(
+        "apis.app_api.users.routes.get_app_role_service", return_value=service
+    )
+    patcher.start()
+    client = TestClient(app)
+    client._patcher = patcher  # type: ignore[attr-defined]
+    return client
+
+
+def test_permissions_includes_admin_scopes() -> None:
+    client = _users_client(_permissions())
+    try:
+        body = client.get("/users/me/permissions").json()
+    finally:
+        client._patcher.stop()  # type: ignore[attr-defined]
+
+    assert body["adminScopes"] == ["admin.skills"]
+
+
+def test_permissions_includes_skills() -> None:
+    """Regression: `skills` was on the model for months but never in the response."""
+    client = _users_client(_permissions())
+    try:
+        body = client.get("/users/me/permissions").json()
+    finally:
+        client._patcher.stop()  # type: ignore[attr-defined]
+
+    assert body["skills"] == ["skill_a"]
+
+
+def test_permissions_response_is_camel_cased() -> None:
+    """The SPA reads camelCase; a snake_case key would silently read undefined."""
+    client = _users_client(_permissions())
+    try:
+        body = client.get("/users/me/permissions").json()
+    finally:
+        client._patcher.stop()  # type: ignore[attr-defined]
+
+    assert "adminScopes" in body
+    assert "admin_scopes" not in body
+    assert "appRoles" in body
+    assert "quotaTier" in body
+
+
+def test_permissions_defaults_to_empty_for_a_user_with_no_scopes() -> None:
+    client = _users_client(_permissions(admin_scopes=[], skills=[]))
+    try:
+        body = client.get("/users/me/permissions").json()
+    finally:
+        client._patcher.stop()  # type: ignore[attr-defined]
+
+    assert body["adminScopes"] == []
+    assert body["skills"] == []
diff --git a/docs/specs/granular-admin-permissions.md b/docs/specs/granular-admin-permissions.md
index 1ec42a35c..d3289cc13 100644
--- a/docs/specs/granular-admin-permissions.md
+++ b/docs/specs/granular-admin-permissions.md
@@ -295,13 +295,16 @@ module level and the handlers reference the alias:
 
 ```python
 # apis/app_api/admin/tools/routes.py
-_require = require_admin_scope("admin.tools")
+require_tools_admin = require_admin_scope("admin.tools")
 
 @router.get("")
-async def list_tools(admin: User = Depends(_require)):
+async def list_tools(admin: User = Depends(require_tools_admin)):
 ```
 
-One mechanical substitution per file, 15 files. `admin/roles/routes.py` and
+**As built (PR-2):** one mechanical substitution per file, **13 packages**.
+The dependency is named after its area rather than a private `_require` —
+mirroring the pre-existing `require_marketplace_admin`, and giving tests a
+stable public handle to override. `admin/roles/routes.py` and
 `admin/auth_providers/routes.py` keep bare `require_admin` (I1).
 
 The migration is fully contained: `require_admin` is *invoked* nowhere outside
@@ -402,8 +405,8 @@ on the scope.
 | PR | Content |
 |---|---|
 | **PR-1** | Data + registry: `granted_admin_scopes` on `AppRole`, `admin_scopes` through `EffectivePermissions`/`UserEffectivePermissions`/`_merge_permissions`, `admin_scopes.py` registry, non-delegable + unknown-scope validation in `role_constraints.py` wired into `admin_service`, `grantedAdminScopes` on the `AppRoleCreate`/`AppRoleUpdate` bodies so the axis round-trips end to end. Unit tests. **Inert** — the value is stored and resolved, but no authorization path reads it. |
-| **PR-2** | Enforcement: `require_admin_scope`, the 15-file alias migration, the I3 write-through guard on `set_roles_for_*`, the §6.3 architecture test. Behavior for `system_admin` unchanged. Also fix the two stale auth docs while the context is loaded — `apis/app_api/admin/README.md` and `apis/shared/auth/RBAC_QUICK_REFERENCE.md` both document helpers that do not exist (`require_roles`, `require_all_roles`, `has_any_role`, `require_faculty`, …) and both describe `require_admin` as "Admin or SuperAdmin". Anyone implementing delegated admin will read them first. |
-| **PR-3** | API surface: `adminScopes` on `/users/me/permissions`, `GET /admin/roles/admin-scopes` registry endpoint. Watch the precedent bug here: `UserPermissionsResponse` (`app_api/users/routes.py:37-43`) still omits `skills` even though `UserEffectivePermissions` has carried it for months — a field added to the model and forgotten in the response shape. Add `skills` while in there. |
+| **PR-2** ✅ #774 | Enforcement: `require_admin_scope`, the 13-package alias migration, the I3 write-through guard on `set_roles_for_*`, the §6.3 architecture test. Behavior for `system_admin` unchanged. Also fix the two stale auth docs while the context is loaded — `apis/app_api/admin/README.md` and `apis/shared/auth/RBAC_QUICK_REFERENCE.md` both document helpers that do not exist (`require_roles`, `require_all_roles`, `has_any_role`, `require_faculty`, …) and both describe `require_admin` as "Admin or SuperAdmin". Anyone implementing delegated admin will read them first. **As built**, two things were added beyond the plan: the write-through guard raises `RoleMutationForbidden` → 403 through a new app-level handler (the resource routes catch `ValueError` → 400, which would misreport a denied escalation as a bad request), and a `override_admin_auth` test helper reads dependencies off the app rather than importing them — `test_skills_feature_flag.py` reloads the admin routes module, which rebuilds every dependency object and silently breaks an import-based override list. |
+| **PR-3** ✅ | API surface: `adminScopes` on `/users/me/permissions`, `GET /admin/roles/admin-scopes` registry endpoint. Watch the precedent bug here: `UserPermissionsResponse` (`app_api/users/routes.py:37-43`) still omits `skills` even though `UserEffectivePermissions` has carried it for months — a field added to the model and forgotten in the response shape. Add `skills` while in there. **As built**, the registry endpoint must be declared *above* `/{role_id}` — a single-segment literal loses to a single-segment path parameter declared first, and the symptom is a 404 rather than an import-time error. Guarded by a declaration-order test. |
 | **PR-4** | SPA: `adminScopes` signal + `hasAdminScope`/`canAccessAdmin`, per-route `adminScopeGuard`, nav filtering, landing resolver, scoped badge refresh, admin-scopes control on the role form. |
 | **PR-5** | Audit log for admin-surface mutations (decided in scope, §8). Promotes the existing structured-log emission points into durable, queryable records with before/after values. |
 
diff --git a/frontend/ai.client/src/app/auth/user.model.ts b/frontend/ai.client/src/app/auth/user.model.ts
index f08b87471..0fdafed46 100644
--- a/frontend/ai.client/src/app/auth/user.model.ts
+++ b/frontend/ai.client/src/app/auth/user.model.ts
@@ -21,6 +21,16 @@ export interface UserPermissions {
   appRoles: string[];
   tools: string[];
   models: string[];
+  skills: string[];
+  /**
+   * Delegated admin feature areas (e.g. `admin.tools`), from the closed
+   * registry served by GET /admin/roles/admin-scopes. Empty for a user who is
+   * not a delegated admin; `system_admin` holds every scope implicitly and so
+   * also carries an empty list here — check `appRoles` for the superuser.
+   *
+   * Not yet consumed: the admin guard and nav still gate on `system_admin`.
+   */
+  adminScopes: string[];
   quotaTier: string | null;
   resolvedAt: string;
 }