Feat v0.9.3 team user roles

Promote team roles to a kernel primitive with many-to-many support.
Users can now hold multiple roles within a team simultaneously.

- Migration 016: team_user_roles table (both dialects)
- 6 new TeamStore methods (AddUserRole, RemoveUserRole, ListUserRoles,
  GetMemberRoles, HasRole, RemoveAllUserRoles)
- RequireRole() middleware with OR semantics and system admin bypass
- 3 new handler endpoints for member role CRUD
- Manifest requires_roles field (advisory for v0.9.3)
- Starlark teams module: get_member_roles(), has_role()
- Team-admin UI: role badge chips + assignment dropdown
- Fixed pre-existing SDK auto-unwrap bug in loadRoles
- 10 new tests

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server/database/migrations/postgres/016_team_user_roles.sql

@@ -0,0 +1,17 @@
+-- ==========================================
+-- Armature — 016 Team User Roles (many-to-many)
+-- ==========================================
+
+CREATE TABLE IF NOT EXISTS team_user_roles (
+    id          UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    team_id     UUID NOT NULL REFERENCES teams(id) ON DELETE CASCADE,
+    user_id     UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    role        VARCHAR(50) NOT NULL,
+    assigned_by UUID REFERENCES users(id) ON DELETE SET NULL,
+    assigned_at TIMESTAMPTZ DEFAULT NOW(),
+    UNIQUE(team_id, user_id, role)
+);
+
+CREATE INDEX IF NOT EXISTS idx_team_user_roles_team_user ON team_user_roles(team_id, user_id);
+CREATE INDEX IF NOT EXISTS idx_team_user_roles_team ON team_user_roles(team_id);
+CREATE INDEX IF NOT EXISTS idx_team_user_roles_user ON team_user_roles(user_id);

server/database/migrations/sqlite/016_team_user_roles.sql

@@ -0,0 +1,17 @@
+-- ==========================================
+-- Armature — 016 Team User Roles (many-to-many, SQLite)
+-- ==========================================
+
+CREATE TABLE IF NOT EXISTS team_user_roles (
+    id          TEXT PRIMARY KEY,
+    team_id     TEXT NOT NULL REFERENCES teams(id) ON DELETE CASCADE,
+    user_id     TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    role        TEXT NOT NULL,
+    assigned_by TEXT REFERENCES users(id) ON DELETE SET NULL,
+    assigned_at TEXT DEFAULT (datetime('now')),
+    UNIQUE(team_id, user_id, role)
+);
+
+CREATE INDEX IF NOT EXISTS idx_team_user_roles_team_user ON team_user_roles(team_id, user_id);
+CREATE INDEX IF NOT EXISTS idx_team_user_roles_team ON team_user_roles(team_id);
+CREATE INDEX IF NOT EXISTS idx_team_user_roles_user ON team_user_roles(user_id);

server/handlers/package_validate.go

@@ -33,6 +33,7 @@ type ManifestInfo struct {
 	Signature       string // reserved for future package signing
 	UserPermissions []string // user-facing permissions declared by the extension
 	GatePermission  string   // if set, checks this user permission before calling on_request
+	RequiresRoles   []string // team roles needed to access this package (advisory, OR semantics)
 }
 
 // ValidateManifest parses a manifest map and validates all required fields,
@@ -168,6 +169,15 @@ func ValidateManifest(manifest map[string]any) (*ManifestInfo, error) {
 	}
 	info.GatePermission, _ = manifest["gate_permission"].(string)
 
+	// v0.9.3: requires_roles — team roles needed to access this package (advisory)
+	if rr, ok := manifest["requires_roles"].([]any); ok {
+		for _, v := range rr {
+			if s, ok := v.(string); ok && s != "" && len(s) <= 50 {
+				info.RequiresRoles = append(info.RequiresRoles, s)
+			}
+		}
+	}
+
 	info.SchemaVersion = ParseSchemaVersion(manifest)
 
 	// ── Type-specific constraints ────────────────────────────────

server/handlers/team_roles_test.go

@@ -0,0 +1,273 @@
+package handlers
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+
+	"armature/database"
+	"armature/middleware"
+	"armature/models"
+	"armature/store"
+)
+
+// ── Manifest: requires_roles parsing ──────────
+
+func TestValidateManifest_RequiresRoles(t *testing.T) {
+	m := map[string]any{
+		"id":             "role-gated",
+		"title":          "Role Gated Ext",
+		"type":           "surface",
+		"requires_roles": []any{"approver", "reviewer"},
+	}
+	info, err := ValidateManifest(m)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if len(info.RequiresRoles) != 2 {
+		t.Fatalf("expected 2 requires_roles, got %d", len(info.RequiresRoles))
+	}
+	if info.RequiresRoles[0] != "approver" || info.RequiresRoles[1] != "reviewer" {
+		t.Errorf("unexpected roles: %v", info.RequiresRoles)
+	}
+}
+
+func TestValidateManifest_RequiresRoles_Empty(t *testing.T) {
+	m := map[string]any{
+		"id":    "no-roles",
+		"title": "No Roles",
+		"type":  "surface",
+	}
+	info, err := ValidateManifest(m)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if len(info.RequiresRoles) != 0 {
+		t.Errorf("expected empty requires_roles, got %v", info.RequiresRoles)
+	}
+}
+
+func TestValidateManifest_RequiresRoles_SkipsInvalid(t *testing.T) {
+	m := map[string]any{
+		"id":             "bad-roles",
+		"title":          "Bad Roles",
+		"type":           "surface",
+		"requires_roles": []any{"ok", "", 42, "also-ok"},
+	}
+	info, err := ValidateManifest(m)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if len(info.RequiresRoles) != 2 {
+		t.Fatalf("expected 2 valid roles, got %d: %v", len(info.RequiresRoles), info.RequiresRoles)
+	}
+}
+
+// ── Store: team_user_roles CRUD ──────────────
+
+func seedTeamAndMember(t *testing.T, stores store.Stores) (teamID, userID, memberID string) {
+	t.Helper()
+	ctx := context.Background()
+
+	userID = seedRoleUser(t, "roleuser", "roleuser@test.com")
+	creatorID := seedRoleUser(t, "creator", "creator@test.com")
+
+	team := &models.Team{Name: "role-test-" + store.NewID()[:8], CreatedBy: creatorID, IsActive: true}
+	if err := stores.Teams.Create(ctx, team); err != nil {
+		t.Fatalf("create team: %v", err)
+	}
+	teamID = team.ID
+
+	mid, err := stores.Teams.AddMemberReturningID(ctx, teamID, userID, "member")
+	if err != nil {
+		t.Fatalf("add member: %v", err)
+	}
+	memberID = mid
+	return
+}
+
+func TestUserRoles_AddAndList(t *testing.T) {
+	database.RequireTestDB(t)
+	stores := testStores(t)
+	ctx := context.Background()
+
+	teamID, userID, _ := seedTeamAndMember(t, stores)
+
+	// Initially: only the primary role
+	roles, err := stores.Teams.GetMemberRoles(ctx, teamID, userID)
+	if err != nil {
+		t.Fatalf("GetMemberRoles: %v", err)
+	}
+	if len(roles) != 1 || roles[0] != "member" {
+		t.Errorf("expected [member], got %v", roles)
+	}
+
+	// Add two additional roles
+	if err := stores.Teams.AddUserRole(ctx, teamID, userID, "reviewer", userID); err != nil {
+		t.Fatalf("AddUserRole: %v", err)
+	}
+	if err := stores.Teams.AddUserRole(ctx, teamID, userID, "approver", userID); err != nil {
+		t.Fatalf("AddUserRole: %v", err)
+	}
+
+	roles, _ = stores.Teams.GetMemberRoles(ctx, teamID, userID)
+	if len(roles) != 3 {
+		t.Fatalf("expected 3 roles, got %d: %v", len(roles), roles)
+	}
+
+	// ListUserRoles returns only additional
+	extra, _ := stores.Teams.ListUserRoles(ctx, teamID, userID)
+	if len(extra) != 2 {
+		t.Fatalf("expected 2 extra roles, got %d: %v", len(extra), extra)
+	}
+}
+
+func TestUserRoles_AddIdempotent(t *testing.T) {
+	database.RequireTestDB(t)
+	stores := testStores(t)
+	ctx := context.Background()
+
+	teamID, userID, _ := seedTeamAndMember(t, stores)
+
+	// Add same role twice — should not error
+	if err := stores.Teams.AddUserRole(ctx, teamID, userID, "reviewer", userID); err != nil {
+		t.Fatalf("first add: %v", err)
+	}
+	if err := stores.Teams.AddUserRole(ctx, teamID, userID, "reviewer", userID); err != nil {
+		t.Fatalf("idempotent add should not error: %v", err)
+	}
+
+	extra, _ := stores.Teams.ListUserRoles(ctx, teamID, userID)
+	if len(extra) != 1 {
+		t.Errorf("expected 1 extra role after idempotent add, got %d", len(extra))
+	}
+}
+
+func TestUserRoles_HasRole(t *testing.T) {
+	database.RequireTestDB(t)
+	stores := testStores(t)
+	ctx := context.Background()
+
+	teamID, userID, _ := seedTeamAndMember(t, stores)
+
+	// Primary role
+	has, _ := stores.Teams.HasRole(ctx, teamID, userID, "member")
+	if !has {
+		t.Error("expected HasRole=true for primary role 'member'")
+	}
+
+	// Non-existent role
+	has, _ = stores.Teams.HasRole(ctx, teamID, userID, "reviewer")
+	if has {
+		t.Error("expected HasRole=false for unassigned role")
+	}
+
+	// Add and check
+	stores.Teams.AddUserRole(ctx, teamID, userID, "reviewer", userID)
+	has, _ = stores.Teams.HasRole(ctx, teamID, userID, "reviewer")
+	if !has {
+		t.Error("expected HasRole=true after adding role")
+	}
+}
+
+func TestUserRoles_Remove(t *testing.T) {
+	database.RequireTestDB(t)
+	stores := testStores(t)
+	ctx := context.Background()
+
+	teamID, userID, _ := seedTeamAndMember(t, stores)
+
+	stores.Teams.AddUserRole(ctx, teamID, userID, "reviewer", userID)
+	stores.Teams.RemoveUserRole(ctx, teamID, userID, "reviewer")
+
+	extra, _ := stores.Teams.ListUserRoles(ctx, teamID, userID)
+	if len(extra) != 0 {
+		t.Errorf("expected 0 extra roles after remove, got %d", len(extra))
+	}
+}
+
+func TestUserRoles_RemoveAllOnMemberDelete(t *testing.T) {
+	database.RequireTestDB(t)
+	stores := testStores(t)
+	ctx := context.Background()
+
+	teamID, userID, _ := seedTeamAndMember(t, stores)
+
+	stores.Teams.AddUserRole(ctx, teamID, userID, "reviewer", userID)
+	stores.Teams.AddUserRole(ctx, teamID, userID, "approver", userID)
+
+	// Cleanup (as the handler does)
+	stores.Teams.RemoveAllUserRoles(ctx, teamID, userID)
+
+	extra, _ := stores.Teams.ListUserRoles(ctx, teamID, userID)
+	if len(extra) != 0 {
+		t.Errorf("expected 0 extra roles after RemoveAll, got %d", len(extra))
+	}
+}
+
+// ── Middleware: RequireRole ───────────────────
+
+func TestRequireRole_Allowed(t *testing.T) {
+	database.RequireTestDB(t)
+	stores := testStores(t)
+	ctx := context.Background()
+
+	teamID, userID, _ := seedTeamAndMember(t, stores)
+	stores.Teams.AddUserRole(ctx, teamID, userID, "reviewer", userID)
+
+	gin.SetMode(gin.TestMode)
+	w := httptest.NewRecorder()
+	_, r := gin.CreateTestContext(w)
+
+	called := false
+	r.Use(func(c *gin.Context) { c.Set("user_id", userID); c.Next() })
+	r.GET("/teams/:teamId/test",
+		middleware.RequireRole(stores.Teams, []string{"reviewer"}, stores),
+		func(c *gin.Context) {
+			called = true
+			c.Status(http.StatusOK)
+		},
+	)
+	req := httptest.NewRequest("GET", "/teams/"+teamID+"/test", nil)
+	r.ServeHTTP(w, req)
+
+	if w.Code != http.StatusOK || !called {
+		t.Errorf("expected 200 + handler called, got %d called=%v", w.Code, called)
+	}
+}
+
+func TestRequireRole_Denied(t *testing.T) {
+	database.RequireTestDB(t)
+	stores := testStores(t)
+
+	teamID, userID, _ := seedTeamAndMember(t, stores)
+
+	gin.SetMode(gin.TestMode)
+	w := httptest.NewRecorder()
+	c, r := gin.CreateTestContext(w)
+
+	r.Use(func(c *gin.Context) { c.Set("user_id", userID); c.Next() })
+	r.GET("/teams/:teamId/test",
+		middleware.RequireRole(stores.Teams, []string{"approver"}, stores),
+		func(c *gin.Context) { c.Status(http.StatusOK) },
+	)
+	c.Request = httptest.NewRequest("GET", "/teams/"+teamID+"/test", nil)
+	r.ServeHTTP(w, c.Request)
+
+	if w.Code != http.StatusForbidden {
+		t.Errorf("expected 403 for missing role, got %d", w.Code)
+	}
+}
+
+// ── helpers ──────────────────────────────────
+
+func seedRoleUser(t *testing.T, username, email string) string {
+	t.Helper()
+	uname := username + store.NewID()[:6]
+	q := `INSERT INTO users (username, email, password_hash, display_name, is_active, auth_source, handle)
+		VALUES ($1, $2, 'hash', $3, true, 'builtin', $4) RETURNING id`
+	return seedInsertReturningID(t, q, uname, email+store.NewID()[:6], uname, uname)
+}

server/handlers/teams.go

@@ -360,6 +360,11 @@ func (h *TeamHandler) RemoveMember(c *gin.Context) {
 		return
 	}
 
+	// Clean up additional roles from team_user_roles
+	if affectedUID != "" {
+		_ = h.stores.Teams.RemoveAllUserRoles(c.Request.Context(), teamID, affectedUID)
+	}
+
 	c.JSON(http.StatusOK, gin.H{"ok": true})
 	if affectedUID != "" {
 		h.notifyAuthChanged(affectedUID, "team_member_removed")
@@ -449,6 +454,106 @@ func (h *TeamHandler) ListTeamAuditActions(c *gin.Context) {
 	c.JSON(http.StatusOK, gin.H{"actions": actions})
 }
 
+// ── Member User Roles (many-to-many) ─────────
+
+// ListMemberRoles returns the full effective role set for a team member.
+// GET /api/v1/teams/:teamId/members/:memberId/roles
+func (h *TeamHandler) ListMemberRoles(c *gin.Context) {
+	teamID := getTeamID(c)
+	memberID := c.Param("memberId")
+
+	uid := h.memberUserID(c.Request.Context(), teamID, memberID)
+	if uid == "" {
+		c.JSON(http.StatusNotFound, gin.H{"error": "member not found"})
+		return
+	}
+
+	roles, err := h.stores.Teams.GetMemberRoles(c.Request.Context(), teamID, uid)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "query failed"})
+		return
+	}
+
+	// Also fetch the primary role for the response
+	member, _ := h.stores.Teams.GetMember(c.Request.Context(), teamID, uid)
+	primary := ""
+	if member != nil {
+		primary = member.Role
+	}
+
+	c.JSON(http.StatusOK, gin.H{"data": roles, "primary": primary})
+}
+
+// AddMemberRole assigns an additional role to a team member.
+// POST /api/v1/teams/:teamId/members/:memberId/roles
+func (h *TeamHandler) AddMemberRole(c *gin.Context) {
+	teamID := getTeamID(c)
+	memberID := c.Param("memberId")
+
+	var req struct {
+		Role string `json:"role" binding:"required,min=1,max=50"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	if err := validateTeamRole(c.Request.Context(), h.stores, teamID, req.Role); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	uid := h.memberUserID(c.Request.Context(), teamID, memberID)
+	if uid == "" {
+		c.JSON(http.StatusNotFound, gin.H{"error": "member not found"})
+		return
+	}
+
+	assignedBy := getUserID(c)
+	if err := h.stores.Teams.AddUserRole(c.Request.Context(), teamID, uid, req.Role, assignedBy); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to add role"})
+		return
+	}
+
+	c.JSON(http.StatusCreated, gin.H{"ok": true})
+	h.notifyAuthChanged(uid, "team_role_added")
+	AuditLog(h.stores.Audit, c, "team.add_member_role", "team", teamID, map[string]interface{}{
+		"member_id": memberID, "user_id": uid, "role": req.Role,
+	})
+}
+
+// RemoveMemberRole removes an additional role from a team member.
+// DELETE /api/v1/teams/:teamId/members/:memberId/roles/:role
+func (h *TeamHandler) RemoveMemberRole(c *gin.Context) {
+	teamID := getTeamID(c)
+	memberID := c.Param("memberId")
+	role := c.Param("role")
+
+	uid := h.memberUserID(c.Request.Context(), teamID, memberID)
+	if uid == "" {
+		c.JSON(http.StatusNotFound, gin.H{"error": "member not found"})
+		return
+	}
+
+	// Don't allow removing the primary role via this endpoint
+	member, _ := h.stores.Teams.GetMember(c.Request.Context(), teamID, uid)
+	if member != nil && member.Role == role {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "cannot remove primary role; use member update instead"})
+		return
+	}
+
+	if err := h.stores.Teams.RemoveUserRole(c.Request.Context(), teamID, uid, role); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to remove role"})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{"ok": true})
+	h.notifyAuthChanged(uid, "team_role_removed")
+	AuditLog(h.stores.Audit, c, "team.remove_member_role", "team", teamID, map[string]interface{}{
+		"member_id": memberID, "user_id": uid, "role": role,
+	})
+}
+
 // ── Team Roles API ─────────────────
 
 // builtinRoles are always present in every team's role list.

server/main.go

@@ -640,6 +640,9 @@ func main() {
 				teamScoped.POST("/members", teams.AddMember)
 				teamScoped.PUT("/members/:memberId", teams.UpdateMember)
 				teamScoped.DELETE("/members/:memberId", teams.RemoveMember)
+				teamScoped.GET("/members/:memberId/roles", teams.ListMemberRoles)
+				teamScoped.POST("/members/:memberId/roles", teams.AddMemberRole)
+				teamScoped.DELETE("/members/:memberId/roles/:role", teams.RemoveMemberRole)
 				teamScoped.GET("/roles", teams.ListRoles)
 				teamScoped.PUT("/roles", teams.UpdateRoles)
 

server/middleware/team.go

@@ -54,6 +54,51 @@ func RequireTeamAdmin(teams store.TeamStore, allStores ...store.Stores) gin.Hand
 	}
 }
 
+// RequireRole returns middleware that restricts access to users holding at least
+// one of the specified roles in the team identified by :teamId.
+// Checks both the primary role (team_members.role) and additional roles
+// (team_user_roles). System admins are always allowed through.
+func RequireRole(teams store.TeamStore, roles []string, allStores ...store.Stores) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		if len(allStores) > 0 && isSystemAdmin(c, allStores[0]) {
+			c.Next()
+			return
+		}
+
+		userID := c.GetString("user_id")
+		teamID := c.Param("teamId")
+		if teamID == "" {
+			c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{
+				"error": "team ID required",
+			})
+			return
+		}
+
+		memberRoles, err := teams.GetMemberRoles(c.Request.Context(), teamID, userID)
+		if err != nil || len(memberRoles) == 0 {
+			c.AbortWithStatusJSON(http.StatusForbidden, gin.H{
+				"error": "required role not held",
+			})
+			return
+		}
+
+		roleSet := make(map[string]bool, len(memberRoles))
+		for _, r := range memberRoles {
+			roleSet[r] = true
+		}
+		for _, required := range roles {
+			if roleSet[required] {
+				c.Next()
+				return
+			}
+		}
+
+		c.AbortWithStatusJSON(http.StatusForbidden, gin.H{
+			"error": "required role not held",
+		})
+	}
+}
+
 // RequireTeamMember returns middleware that restricts access to users who
 // belong to the team identified by :teamId (any role).
 // System admins are always allowed through.

server/models/models.go

@@ -80,6 +80,16 @@ type TeamMember struct {
 	Username    string `json:"username,omitempty"`
 }
 
+// TeamUserRole is a many-to-many join: one user can hold multiple roles in a team.
+type TeamUserRole struct {
+	ID         string `json:"id" db:"id"`
+	TeamID     string `json:"team_id" db:"team_id"`
+	UserID     string `json:"user_id" db:"user_id"`
+	Role       string `json:"role" db:"role"`
+	AssignedBy string `json:"assigned_by,omitempty" db:"assigned_by"`
+	AssignedAt string `json:"assigned_at" db:"assigned_at"`
+}
+
 // PLATFORM POLICIES
 
 var PolicyDefaults = map[string]string{

server/sandbox/runner.go

@@ -454,6 +454,9 @@ func (r *Runner) buildModulesWithLibCtx(ctx context.Context, packageID string, m
 	// Always available — read-only check against kernel permission data
 	modules["permissions"] = BuildPermissionsModule(ctx, r.stores)
 
+	// Always available — read-only team role queries
+	modules["teams"] = BuildTeamsModule(ctx, r.stores)
+
 	// Allows any starlark package to load declared library dependencies.
 	if lc != nil {
 		modules["lib"] = BuildLibModule(ctx, r, packageID, rc, lc)

server/sandbox/teams_module.go

@@ -0,0 +1,62 @@
+// Package sandbox — teams_module.go
+//
+// Read-only module for querying team role membership from Starlark scripts.
+// No sandbox permission required — extensions can check roles without special grants.
+//
+// Starlark API:
+//   teams.get_member_roles(team_id, user_id)  → ["admin", "reviewer", ...]
+//   teams.has_role(team_id, user_id, role)     → True/False
+package sandbox
+
+import (
+	"context"
+
+	"go.starlark.net/starlark"
+	"go.starlark.net/starlarkstruct"
+
+	"armature/store"
+)
+
+// BuildTeamsModule creates the "teams" module.
+// Always available to all extensions (no permission gate).
+func BuildTeamsModule(ctx context.Context, stores store.Stores) *starlarkstruct.Module {
+	return MakeModule("teams", starlark.StringDict{
+
+		"get_member_roles": starlark.NewBuiltin("teams.get_member_roles", func(
+			thread *starlark.Thread, b *starlark.Builtin,
+			args starlark.Tuple, kwargs []starlark.Tuple,
+		) (starlark.Value, error) {
+			var teamID, userID string
+			if err := starlark.UnpackPositionalArgs(b.Name(), args, kwargs, 2, &teamID, &userID); err != nil {
+				return nil, err
+			}
+
+			roles, err := stores.Teams.GetMemberRoles(ctx, teamID, userID)
+			if err != nil {
+				return starlark.NewList(nil), nil
+			}
+
+			elems := make([]starlark.Value, len(roles))
+			for i, r := range roles {
+				elems[i] = starlark.String(r)
+			}
+			return starlark.NewList(elems), nil
+		}),
+
+		"has_role": starlark.NewBuiltin("teams.has_role", func(
+			thread *starlark.Thread, b *starlark.Builtin,
+			args starlark.Tuple, kwargs []starlark.Tuple,
+		) (starlark.Value, error) {
+			var teamID, userID, role string
+			if err := starlark.UnpackPositionalArgs(b.Name(), args, kwargs, 3, &teamID, &userID, &role); err != nil {
+				return nil, err
+			}
+
+			has, err := stores.Teams.HasRole(ctx, teamID, userID, role)
+			if err != nil || !has {
+				return starlark.False, nil
+			}
+			return starlark.True, nil
+		}),
+	})
+}

server/store/interfaces.go

@@ -188,6 +188,26 @@ type TeamStore interface {
 
 	// MergeSettings merges a JSON string into the team's settings column.
 	MergeSettings(ctx context.Context, teamID, settingsJSON string) error
+
+	// ── v0.9.3 — Team User Roles (many-to-many) ──
+
+	// AddUserRole assigns an additional role to a team member. Idempotent.
+	AddUserRole(ctx context.Context, teamID, userID, role, assignedBy string) error
+
+	// RemoveUserRole removes one additional role from a team member.
+	RemoveUserRole(ctx context.Context, teamID, userID, role string) error
+
+	// ListUserRoles returns the additional roles for a member (excludes primary).
+	ListUserRoles(ctx context.Context, teamID, userID string) ([]string, error)
+
+	// GetMemberRoles returns the full effective role set (primary + additional).
+	GetMemberRoles(ctx context.Context, teamID, userID string) ([]string, error)
+
+	// HasRole checks whether a user holds a specific role (primary or additional).
+	HasRole(ctx context.Context, teamID, userID, role string) (bool, error)
+
+	// RemoveAllUserRoles deletes all additional roles for a member (cleanup on removal).
+	RemoveAllUserRoles(ctx context.Context, teamID, userID string) error
 }
 
 // =========================================

server/store/postgres/team.go

@@ -308,3 +308,88 @@ func (s *TeamStore) MergeSettings(ctx context.Context, teamID, settingsJSON stri
 		settingsJSON, teamID)
 	return err
 }
+
+// ── v0.9.3 — Team User Roles (many-to-many) ──────────────────
+
+func (s *TeamStore) AddUserRole(ctx context.Context, teamID, userID, role, assignedBy string) error {
+	_, err := DB.ExecContext(ctx, `
+		INSERT INTO team_user_roles (team_id, user_id, role, assigned_by)
+		VALUES ($1, $2, $3, $4)
+		ON CONFLICT (team_id, user_id, role) DO NOTHING`,
+		teamID, userID, role, assignedBy)
+	return err
+}
+
+func (s *TeamStore) RemoveUserRole(ctx context.Context, teamID, userID, role string) error {
+	_, err := DB.ExecContext(ctx,
+		`DELETE FROM team_user_roles WHERE team_id = $1 AND user_id = $2 AND role = $3`,
+		teamID, userID, role)
+	return err
+}
+
+func (s *TeamStore) ListUserRoles(ctx context.Context, teamID, userID string) ([]string, error) {
+	rows, err := DB.QueryContext(ctx,
+		`SELECT role FROM team_user_roles WHERE team_id = $1 AND user_id = $2 ORDER BY role`,
+		teamID, userID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var roles []string
+	for rows.Next() {
+		var r string
+		if err := rows.Scan(&r); err != nil {
+			return nil, err
+		}
+		roles = append(roles, r)
+	}
+	if roles == nil {
+		roles = []string{}
+	}
+	return roles, rows.Err()
+}
+
+func (s *TeamStore) GetMemberRoles(ctx context.Context, teamID, userID string) ([]string, error) {
+	rows, err := DB.QueryContext(ctx, `
+		SELECT role FROM team_members WHERE team_id = $1 AND user_id = $2
+		UNION
+		SELECT role FROM team_user_roles WHERE team_id = $1 AND user_id = $2
+		ORDER BY role`,
+		teamID, userID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var roles []string
+	for rows.Next() {
+		var r string
+		if err := rows.Scan(&r); err != nil {
+			return nil, err
+		}
+		roles = append(roles, r)
+	}
+	if roles == nil {
+		roles = []string{}
+	}
+	return roles, rows.Err()
+}
+
+func (s *TeamStore) HasRole(ctx context.Context, teamID, userID, role string) (bool, error) {
+	var exists bool
+	err := DB.QueryRowContext(ctx, `
+		SELECT EXISTS(
+			SELECT 1 FROM team_members WHERE team_id = $1 AND user_id = $2 AND role = $3
+			UNION ALL
+			SELECT 1 FROM team_user_roles WHERE team_id = $1 AND user_id = $2 AND role = $3
+		)`, teamID, userID, role).Scan(&exists)
+	return exists, err
+}
+
+func (s *TeamStore) RemoveAllUserRoles(ctx context.Context, teamID, userID string) error {
+	_, err := DB.ExecContext(ctx,
+		`DELETE FROM team_user_roles WHERE team_id = $1 AND user_id = $2`,
+		teamID, userID)
+	return err
+}

server/store/sqlite/team.go

@@ -314,3 +314,88 @@ func (s *TeamStore) MergeSettings(ctx context.Context, teamID, settingsJSON stri
 		settingsJSON, teamID)
 	return err
 }
+
+// ── v0.9.3 — Team User Roles (many-to-many) ──────────────────
+
+func (s *TeamStore) AddUserRole(ctx context.Context, teamID, userID, role, assignedBy string) error {
+	_, err := DB.ExecContext(ctx, `
+		INSERT INTO team_user_roles (id, team_id, user_id, role, assigned_by)
+		VALUES (?, ?, ?, ?, ?)
+		ON CONFLICT (team_id, user_id, role) DO NOTHING`,
+		store.NewID(), teamID, userID, role, assignedBy)
+	return err
+}
+
+func (s *TeamStore) RemoveUserRole(ctx context.Context, teamID, userID, role string) error {
+	_, err := DB.ExecContext(ctx,
+		`DELETE FROM team_user_roles WHERE team_id = ? AND user_id = ? AND role = ?`,
+		teamID, userID, role)
+	return err
+}
+
+func (s *TeamStore) ListUserRoles(ctx context.Context, teamID, userID string) ([]string, error) {
+	rows, err := DB.QueryContext(ctx,
+		`SELECT role FROM team_user_roles WHERE team_id = ? AND user_id = ? ORDER BY role`,
+		teamID, userID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var roles []string
+	for rows.Next() {
+		var r string
+		if err := rows.Scan(&r); err != nil {
+			return nil, err
+		}
+		roles = append(roles, r)
+	}
+	if roles == nil {
+		roles = []string{}
+	}
+	return roles, rows.Err()
+}
+
+func (s *TeamStore) GetMemberRoles(ctx context.Context, teamID, userID string) ([]string, error) {
+	rows, err := DB.QueryContext(ctx, `
+		SELECT role FROM team_members WHERE team_id = ? AND user_id = ?
+		UNION
+		SELECT role FROM team_user_roles WHERE team_id = ? AND user_id = ?
+		ORDER BY role`,
+		teamID, userID, teamID, userID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var roles []string
+	for rows.Next() {
+		var r string
+		if err := rows.Scan(&r); err != nil {
+			return nil, err
+		}
+		roles = append(roles, r)
+	}
+	if roles == nil {
+		roles = []string{}
+	}
+	return roles, rows.Err()
+}
+
+func (s *TeamStore) HasRole(ctx context.Context, teamID, userID, role string) (bool, error) {
+	var count int
+	err := DB.QueryRowContext(ctx, `
+		SELECT COUNT(*) FROM (
+			SELECT 1 FROM team_members WHERE team_id = ? AND user_id = ? AND role = ?
+			UNION ALL
+			SELECT 1 FROM team_user_roles WHERE team_id = ? AND user_id = ? AND role = ?
+		)`, teamID, userID, role, teamID, userID, role).Scan(&count)
+	return count > 0, err
+}
+
+func (s *TeamStore) RemoveAllUserRoles(ctx context.Context, teamID, userID string) error {
+	_, err := DB.ExecContext(ctx,
+		`DELETE FROM team_user_roles WHERE team_id = ? AND user_id = ?`,
+		teamID, userID)
+	return err
+}