diff --git a/tests/conftest.py b/tests/conftest.py
index bca2322af..643193f27 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -380,6 +380,14 @@ async def client(app, tmp_data_dir):
     if device_store._db is not None:
         await device_store.close()
     await device_store.init()
+    council_roles = app.state.council_roles
+    if council_roles._db is not None:
+        await council_roles.close()
+    await council_roles.init()
+    council_members = app.state.council_members
+    if council_members._db is not None:
+        await council_members.close()
+    await council_members.init()
     # BrowserApp v2 stores
     from tinyagentos.routes.desktop_browser.store import BrowserStore, BrowserCookieStore
     _browser_store = BrowserStore(tmp_data_dir / "browser.sqlite3")
@@ -445,6 +453,8 @@ async def client(app, tmp_data_dir):
     await app.state.http_client.aclose()
     await _browser_store.close()
     await _browser_cookie_store.close()
+    await app.state.council_roles.close()
+    await app.state.council_members.close()
 
 
 def create_test_qmd_db(db_path):
diff --git a/tests/test_council_routes.py b/tests/test_council_routes.py
new file mode 100644
index 000000000..c7eafe6de
--- /dev/null
+++ b/tests/test_council_routes.py
@@ -0,0 +1,52 @@
+import pytest
+
+
+@pytest.mark.asyncio
+class TestCouncilRoutes:
+    async def test_list_roles_returns_seeded_roles(self, client, app):
+        roles_resp = await client.get("/api/council/roles")
+        assert roles_resp.status_code == 200
+        roles = roles_resp.json()
+        assert len(roles) == 10
+        slugs = {r["slug"] for r in roles}
+        expected = {
+            "coder", "reviewer", "writer", "editor", "summarizer",
+            "translator", "researcher", "planner", "critic", "data_analyst",
+        }
+        assert slugs == expected
+
+    async def test_list_roles_has_expected_fields(self, client, app):
+        roles_resp = await client.get("/api/council/roles")
+        assert roles_resp.status_code == 200
+        roles = roles_resp.json()
+        for role in roles:
+            assert "slug" in role
+            assert "display_name" in role
+            assert "description" in role
+            assert "gauge_status" in role
+            assert "builtin" in role
+
+    async def test_list_members_returns_empty_when_none(self, client, app):
+        members_resp = await client.get("/api/council/members")
+        assert members_resp.status_code == 200
+        assert members_resp.json() == []
+
+    async def test_list_members_returns_added_members(self, client, app):
+        store = app.state.council_members
+        if store._db is not None:
+            await store.close()
+        await store.init()
+        await store.add_member(
+            canonical_id="agent-route-1",
+            model_id="kilo-auto/free",
+            provider="kilocode",
+            roles=[{"role": "coder", "score": 90, "source": "local"}],
+            autonomy={"coder": "propose"},
+        )
+
+        members_resp = await client.get("/api/council/members")
+        assert members_resp.status_code == 200
+        members = members_resp.json()
+        assert len(members) == 1
+        assert members[0]["canonical_id"] == "agent-route-1"
+        assert members[0]["roles"] == [{"role": "coder", "score": 90, "source": "local"}]
diff --git a/tests/test_council_stores.py b/tests/test_council_stores.py
new file mode 100644
index 000000000..0b24f6e2e
--- /dev/null
+++ b/tests/test_council_stores.py
@@ -0,0 +1,130 @@
+import pytest
+import pytest_asyncio
+from pathlib import Path
+
+from tinyagentos.council.member_store import MemberStore
+from tinyagentos.council.role_registry import RoleRegistry
+
+
+@pytest_asyncio.fixture
+async def role_registry(tmp_path):
+    store = RoleRegistry(tmp_path / "council_roles.db")
+    await store.init()
+    yield store
+    await store.close()
+
+
+@pytest_asyncio.fixture
+async def member_store(tmp_path):
+    store = MemberStore(tmp_path / "council_members.db")
+    await store.init()
+    yield store
+    await store.close()
+
+
+@pytest.mark.asyncio
+class TestRoleRegistry:
+    async def test_seeds_ten_roles(self, role_registry):
+        roles = await role_registry.list_roles()
+        assert len(roles) == 10
+        slugs = {r["slug"] for r in roles}
+        expected = {
+            "coder", "reviewer", "writer", "editor", "summarizer",
+            "translator", "researcher", "planner", "critic", "data_analyst",
+        }
+        assert slugs == expected
+
+    async def test_get_existing_role(self, role_registry):
+        role = await role_registry.get_role("coder")
+        assert role is not None
+        assert role["display_name"] == "Coder"
+        assert role["gauge_status"] == "proven"
+        assert role["builtin"] is True
+
+    async def test_get_missing_role_returns_none(self, role_registry):
+        role = await role_registry.get_role("nonexistent")
+        assert role is None
+
+    async def test_roles_sorted_by_slug(self, role_registry):
+        roles = await role_registry.list_roles()
+        slugs = [r["slug"] for r in roles]
+        assert slugs == sorted(slugs)
+
+    async def test_proven_roles_have_suite_version(self, role_registry):
+        roles = await role_registry.list_roles()
+        proven = [r for r in roles if r["gauge_status"] == "proven"]
+        for r in proven:
+            assert r["suite_version"] is not None
+
+    async def test_provisional_roles_have_null_suite_version(self, role_registry):
+        roles = await role_registry.list_roles()
+        provisional = [r for r in roles if r["gauge_status"] == "provisional"]
+        for r in provisional:
+            assert r["suite_version"] is None
+
+
+@pytest.mark.asyncio
+class TestMemberStore:
+    async def test_add_and_list_member(self, member_store):
+        member = await member_store.add_member(
+            canonical_id="agent-001",
+            model_id="kilo-auto/free",
+            provider="kilocode",
+            roles=[{"role": "coder", "score": 85, "source": "local"}],
+            autonomy={"coder": "propose"},
+        )
+        assert member["status"] == "active"
+        assert member["id"] is not None
+
+        members = await member_store.list_members()
+        assert len(members) == 1
+        assert members[0]["canonical_id"] == "agent-001"
+        assert members[0]["model_id"] == "kilo-auto/free"
+        assert members[0]["roles"] == [{"role": "coder", "score": 85, "source": "local"}]
+        assert members[0]["autonomy"] == {"coder": "propose"}
+
+    async def test_get_member(self, member_store):
+        created = await member_store.add_member(
+            canonical_id="agent-002",
+            model_id="stepflash:free",
+            provider="kilocode",
+            roles=[],
+            autonomy={},
+        )
+        fetched = await member_store.get_member(created["id"])
+        assert fetched is not None
+        assert fetched["canonical_id"] == "agent-002"
+        assert fetched["provider"] == "kilocode"
+
+    async def test_get_missing_returns_none(self, member_store):
+        assert await member_store.get_member("does-not-exist") is None
+
+    async def test_list_empty(self, member_store):
+        assert await member_store.list_members() == []
+
+    async def test_duplicate_canonical_id_rejected(self, member_store):
+        await member_store.add_member(
+            canonical_id="agent-dup",
+            model_id="m1",
+            provider="p",
+            roles=[],
+            autonomy={},
+        )
+        with pytest.raises(Exception):
+            await member_store.add_member(
+                canonical_id="agent-dup",
+                model_id="m2",
+                provider="p",
+                roles=[],
+                autonomy={},
+            )
+
+    async def test_default_status_is_active(self, member_store):
+        member = await member_store.add_member(
+            canonical_id="agent-003",
+            model_id="hy3:free",
+            provider="kilocode",
+            roles=[],
+            autonomy={},
+        )
+        assert member["status"] == "active"
diff --git a/tinyagentos/app.py b/tinyagentos/app.py
index 68d76e7d6..a7ebbf0f1 100644
--- a/tinyagentos/app.py
+++ b/tinyagentos/app.py
@@ -295,6 +295,11 @@ def create_app(data_dir: Path | None = None, catalog_dir: Path | None = None) ->
     score_cache = ScoreCache(benchmark_store, poll_interval_seconds=15.0)
     scheduler_history_store = HistoryStore(data_dir / "scheduler_history.db")
 
+    from tinyagentos.council.role_registry import RoleRegistry
+    from tinyagentos.council.member_store import MemberStore
+    council_role_registry = RoleRegistry(data_dir / "council.db")
+    council_member_store = MemberStore(data_dir / "council.db")
+
     async def _probe_backend(backend: dict) -> dict:
         return await check_backend_health(http_client, backend)
 
@@ -631,6 +636,8 @@ async def lifespan(app: FastAPI):
 
         await benchmark_store.init()
         await scheduler_history_store.init()
+        await council_role_registry.init()
+        await council_member_store.init()
         app.state.config = config
         app.state.config_path = config_path
         app.state.data_dir = data_dir
@@ -867,6 +874,8 @@ async def _browser_reap_loop(app: FastAPI) -> None:
         app.state.benchmark_store = benchmark_store
         app.state.score_cache = score_cache
         app.state.scheduler_history_store = scheduler_history_store
+        app.state.council_roles = council_role_registry
+        app.state.council_members = council_member_store
         orchestrator = RestartOrchestrator(app.state)
         app.state.orchestrator = orchestrator
         # Boot-time: check if a pending restart was applied successfully
@@ -1637,6 +1646,8 @@ async def dispatch(self, request, call_next):
     app.state.license_acceptances = license_acceptances_store
     app.state.cluster_pairing = cluster_pairing_store
     app.state.capability_map = capability_map_store
+    app.state.council_roles = council_role_registry
+    app.state.council_members = council_member_store
 
     # Detect and set container runtime (eager, so tests work without lifespan)
     try:
diff --git a/tinyagentos/council/__init__.py b/tinyagentos/council/__init__.py
new file mode 100644
index 000000000..9f4d2348e
--- /dev/null
+++ b/tinyagentos/council/__init__.py
@@ -0,0 +1 @@
+"""taOS Council slice S1: role registry + member store."""
diff --git a/tinyagentos/council/member_store.py b/tinyagentos/council/member_store.py
new file mode 100644
index 000000000..1515b5c8b
--- /dev/null
+++ b/tinyagentos/council/member_store.py
@@ -0,0 +1,105 @@
+from __future__ import annotations
+
+import json
+import logging
+import time
+import uuid
+from pathlib import Path
+
+from tinyagentos.base_store import BaseStore
+
+logger = logging.getLogger(__name__)
+
+MEMBER_STORE_SCHEMA = """
+CREATE TABLE IF NOT EXISTS council_members (
+    id              TEXT PRIMARY KEY,
+    canonical_id    TEXT NOT NULL UNIQUE,
+    model_id        TEXT NOT NULL,
+    provider        TEXT NOT NULL,
+    roles           TEXT NOT NULL,
+    autonomy        TEXT NOT NULL,
+    status          TEXT NOT NULL,
+    added_at        TEXT NOT NULL
+);
+"""
+
+
+class MemberStore(BaseStore):
+    SCHEMA = MEMBER_STORE_SCHEMA
+
+    async def add_member(
+        self,
+        canonical_id: str,
+        model_id: str,
+        provider: str,
+        roles: list[dict],
+        autonomy: dict,
+        status: str = "active",
+    ) -> dict:
+        member_id = uuid.uuid4().hex
+        now = time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime())
+        await self._db.execute(
+            """
+            INSERT INTO council_members (id, canonical_id, model_id, provider, roles, autonomy, status, added_at)
+            VALUES (?, ?, ?, ?, ?, ?, ?, ?)
+            """,
+            (
+                member_id,
+                canonical_id,
+                model_id,
+                provider,
+                json.dumps(roles),
+                json.dumps(autonomy),
+                status,
+                now,
+            ),
+        )
+        await self._db.commit()
+        return {
+            "id": member_id,
+            "canonical_id": canonical_id,
+            "model_id": model_id,
+            "provider": provider,
+            "roles": roles,
+            "autonomy": autonomy,
+            "status": status,
+            "added_at": now,
+        }
+
+    async def list_members(self) -> list[dict]:
+        async with self._db.execute(
+            "SELECT id, canonical_id, model_id, provider, roles, autonomy, status, added_at FROM council_members ORDER BY added_at"
+        ) as cursor:
+            rows = await cursor.fetchall()
+        return [
+            {
+                "id": r[0],
+                "canonical_id": r[1],
+                "model_id": r[2],
+                "provider": r[3],
+                "roles": json.loads(r[4]),
+                "autonomy": json.loads(r[5]),
+                "status": r[6],
+                "added_at": r[7],
+            }
+            for r in rows
+        ]
+
+    async def get_member(self, member_id: str) -> dict | None:
+        async with self._db.execute(
+            "SELECT id, canonical_id, model_id, provider, roles, autonomy, status, added_at FROM council_members WHERE id = ?",
+            (member_id,),
+        ) as cursor:
+            row = await cursor.fetchone()
+        if row is None:
+            return None
+        return {
+            "id": row[0],
+            "canonical_id": row[1],
+            "model_id": row[2],
+            "provider": row[3],
+            "roles": json.loads(row[4]),
+            "autonomy": json.loads(row[5]),
+            "status": row[6],
+            "added_at": row[7],
+        }
diff --git a/tinyagentos/council/role_registry.py b/tinyagentos/council/role_registry.py
new file mode 100644
index 000000000..311437fd1
--- /dev/null
+++ b/tinyagentos/council/role_registry.py
@@ -0,0 +1,84 @@
+from __future__ import annotations
+
+import logging
+from pathlib import Path
+
+from tinyagentos.base_store import BaseStore
+
+logger = logging.getLogger(__name__)
+
+ROLE_REGISTRY_SCHEMA = """
+CREATE TABLE IF NOT EXISTS council_roles (
+    slug            TEXT PRIMARY KEY,
+    display_name    TEXT NOT NULL,
+    description     TEXT NOT NULL DEFAULT '',
+    gauge_status    TEXT NOT NULL,
+    suite_version   TEXT,
+    builtin         INTEGER NOT NULL DEFAULT 1
+);
+"""
+
+SEED_ROLES = [
+    ("coder", "Coder", "Writes and modifies code within bounded repo tasks.", "proven", "1.0.0"),
+    ("reviewer", "Reviewer", "Reviews merged PRs against a ground-truth review.", "proven", "1.0.0"),
+    ("writer", "Writer", "Drafts content from briefs with rubric grading.", "designed", "1.0.0"),
+    ("editor", "Editor", "Edits flawed drafts for clarity and correctness.", "designed", "1.0.0"),
+    ("summarizer", "Summarizer", "Summarizes long documents with fact-recall grading.", "designed", "1.0.0"),
+    ("translator", "Translator", "Translates text with round-trip verification.", "designed", "1.0.0"),
+    ("researcher", "Researcher", "Answers questions with verifiable research.", "provisional", None),
+    ("planner", "Planner", "Breaks goals into actionable task plans.", "provisional", None),
+    ("critic", "Critic", "Critiques artifacts against known-flaw lists.", "provisional", None),
+    ("data_analyst", "Data analyst", "Answers questions from CSV datasets.", "provisional", None),
+]
+
+
+class RoleRegistry(BaseStore):
+    SCHEMA = ROLE_REGISTRY_SCHEMA
+
+    async def _post_init(self) -> None:
+        await self._seed()
+
+    async def _seed(self) -> None:
+        for slug, display_name, description, gauge_status, suite_version in SEED_ROLES:
+            await self._db.execute(
+                """
+                INSERT OR IGNORE INTO council_roles (slug, display_name, description, gauge_status, suite_version)
+                VALUES (?, ?, ?, ?, ?)
+                """,
+                (slug, display_name, description, gauge_status, suite_version),
+            )
+        await self._db.commit()
+
+    async def list_roles(self) -> list[dict]:
+        async with self._db.execute(
+            "SELECT slug, display_name, description, gauge_status, suite_version, builtin FROM council_roles ORDER BY slug"
+        ) as cursor:
+            rows = await cursor.fetchall()
+        return [
+            {
+                "slug": r[0],
+                "display_name": r[1],
+                "description": r[2],
+                "gauge_status": r[3],
+                "suite_version": r[4],
+                "builtin": bool(r[5]),
+            }
+            for r in rows
+        ]
+
+    async def get_role(self, slug: str) -> dict | None:
+        async with self._db.execute(
+            "SELECT slug, display_name, description, gauge_status, suite_version, builtin FROM council_roles WHERE slug = ?",
+            (slug,),
+        ) as cursor:
+            row = await cursor.fetchone()
+        if row is None:
+            return None
+        return {
+            "slug": row[0],
+            "display_name": row[1],
+            "description": row[2],
+            "gauge_status": row[3],
+            "suite_version": row[4],
+            "builtin": bool(row[5]),
+        }
diff --git a/tinyagentos/routes/__init__.py b/tinyagentos/routes/__init__.py
index 2322ff856..a73745c51 100644
--- a/tinyagentos/routes/__init__.py
+++ b/tinyagentos/routes/__init__.py
@@ -385,3 +385,6 @@ def register_all_routers(app):
 
     from tinyagentos.routes.receipts import router as receipts_router
     app.include_router(receipts_router)
+
+    from tinyagentos.routes.council import router as council_router
+    app.include_router(council_router)
diff --git a/tinyagentos/routes/council.py b/tinyagentos/routes/council.py
new file mode 100644
index 000000000..582a44e81
--- /dev/null
+++ b/tinyagentos/routes/council.py
@@ -0,0 +1,27 @@
+from __future__ import annotations
+
+import logging
+
+from fastapi import APIRouter, Request
+from fastapi.responses import JSONResponse
+
+from tinyagentos.council.member_store import MemberStore
+from tinyagentos.council.role_registry import RoleRegistry
+
+logger = logging.getLogger(__name__)
+
+router = APIRouter()
+
+
+@router.get("/api/council/roles")
+async def api_list_roles(request: Request):
+    registry = request.app.state.council_roles
+    roles = await registry.list_roles()
+    return roles
+
+
+@router.get("/api/council/members")
+async def api_list_members(request: Request):
+    store = request.app.state.council_members
+    members = await store.list_members()
+    return members