feat: separate default and additional Coder Agents system prompts (#23616)

Admins can now control whether the built-in Coder Agents default system
prompt is prepended to their custom instructions, rather than having the
custom prompt silently replace the default.

**Changes:**
- New `include_default_system_prompt` boolean toggle (defaults to `true`
for existing deployments) stored as a site config key — no migration
needed.
- GET `/api/experimental/chats/config/system-prompt` returns the toggle
state, the custom prompt, and a preview of the built-in default.
- PUT persists both the toggle and custom prompt atomically in a single
transaction.
- `resolvedChatSystemPrompt()` composes `[default?, custom?]` joined by
`\n\n`, falling back to the built-in default on DB errors.
- Settings UI adds a Switch toggle with conditional helper text and a
"Preview" button that shows the built-in default prompt via the existing
`TextPreviewDialog`.
- Comprehensive test coverage: 15 subtests covering toggle behavior,
prompt composition matrix, auth boundaries, and integration with chat
creation.

coderd/database/dbauthz/dbauthz.go

@@ -2578,6 +2578,18 @@ func (q *querier) GetChatFilesByIDs(ctx context.Context, ids []uuid.UUID) ([]dat
 	return files, nil
 }
 
+func (q *querier) GetChatIncludeDefaultSystemPrompt(ctx context.Context) (bool, error) {
+	// The include-default-system-prompt flag is a deployment-wide setting read
+	// during chat creation by every authenticated user, so no RBAC policy
+	// check is needed. We still verify that a valid actor exists in the
+	// context to ensure this is never callable by an unauthenticated or
+	// system-internal path without an explicit actor.
+	if _, ok := ActorFromContext(ctx); !ok {
+		return false, ErrNoActor
+	}
+	return q.db.GetChatIncludeDefaultSystemPrompt(ctx)
+}
+
 func (q *querier) GetChatMessageByID(ctx context.Context, id int64) (database.ChatMessage, error) {
 	// ChatMessages are authorized through their parent Chat.
 	// We need to fetch the message first to get its chat_id.
@@ -2674,6 +2686,18 @@ func (q *querier) GetChatSystemPrompt(ctx context.Context) (string, error) {
 	return q.db.GetChatSystemPrompt(ctx)
 }
 
+func (q *querier) GetChatSystemPromptConfig(ctx context.Context) (database.GetChatSystemPromptConfigRow, error) {
+	// The system prompt configuration is a deployment-wide setting read during
+	// chat creation by every authenticated user, so no RBAC policy check is
+	// needed. We still verify that a valid actor exists in the context to
+	// ensure this is never callable by an unauthenticated or system-internal
+	// path without an explicit actor.
+	if _, ok := ActorFromContext(ctx); !ok {
+		return database.GetChatSystemPromptConfigRow{}, ErrNoActor
+	}
+	return q.db.GetChatSystemPromptConfig(ctx)
+}
+
 // GetChatTemplateAllowlist requires deployment-config read permission,
 // unlike the peer getters (GetChatDesktopEnabled, etc.) which only
 // check actor presence. The allowlist is admin-configuration that
@@ -6842,6 +6866,13 @@ func (q *querier) UpsertChatDiffStatusReference(ctx context.Context, arg databas
 	return q.db.UpsertChatDiffStatusReference(ctx, arg)
 }
 
+func (q *querier) UpsertChatIncludeDefaultSystemPrompt(ctx context.Context, includeDefaultSystemPrompt bool) error {
+	if err := q.authorizeContext(ctx, policy.ActionUpdate, rbac.ResourceDeploymentConfig); err != nil {
+		return err
+	}
+	return q.db.UpsertChatIncludeDefaultSystemPrompt(ctx, includeDefaultSystemPrompt)
+}
+
 func (q *querier) UpsertChatSystemPrompt(ctx context.Context, value string) error {
 	if err := q.authorizeContext(ctx, policy.ActionUpdate, rbac.ResourceDeploymentConfig); err != nil {
 		return err

coderd/database/dbauthz/dbauthz_test.go

@@ -655,6 +655,17 @@ func (s *MethodTestSuite) TestChats() {
 		dbm.EXPECT().GetChatQueuedMessages(gomock.Any(), chat.ID).Return(qms, nil).AnyTimes()
 		check.Args(chat.ID).Asserts(chat, policy.ActionRead).Returns(qms)
 	}))
+	s.Run("GetChatIncludeDefaultSystemPrompt", s.Mocked(func(dbm *dbmock.MockStore, _ *gofakeit.Faker, check *expects) {
+		dbm.EXPECT().GetChatIncludeDefaultSystemPrompt(gomock.Any()).Return(true, nil).AnyTimes()
+		check.Args().Asserts()
+	}))
+	s.Run("GetChatSystemPromptConfig", s.Mocked(func(dbm *dbmock.MockStore, _ *gofakeit.Faker, check *expects) {
+		dbm.EXPECT().GetChatSystemPromptConfig(gomock.Any()).Return(database.GetChatSystemPromptConfigRow{
+			ChatSystemPrompt:           "prompt",
+			IncludeDefaultSystemPrompt: true,
+		}, nil).AnyTimes()
+		check.Args().Asserts()
+	}))
 	s.Run("GetChatSystemPrompt", s.Mocked(func(dbm *dbmock.MockStore, _ *gofakeit.Faker, check *expects) {
 		dbm.EXPECT().GetChatSystemPrompt(gomock.Any()).Return("prompt", nil).AnyTimes()
 		check.Args().Asserts()
@@ -900,6 +911,10 @@ func (s *MethodTestSuite) TestChats() {
 		dbm.EXPECT().BackoffChatDiffStatus(gomock.Any(), arg).Return(nil).AnyTimes()
 		check.Args(arg).Asserts(rbac.ResourceChat, policy.ActionUpdate).Returns()
 	}))
+	s.Run("UpsertChatIncludeDefaultSystemPrompt", s.Mocked(func(dbm *dbmock.MockStore, _ *gofakeit.Faker, check *expects) {
+		dbm.EXPECT().UpsertChatIncludeDefaultSystemPrompt(gomock.Any(), false).Return(nil).AnyTimes()
+		check.Args(false).Asserts(rbac.ResourceDeploymentConfig, policy.ActionUpdate)
+	}))
 	s.Run("UpsertChatSystemPrompt", s.Mocked(func(dbm *dbmock.MockStore, _ *gofakeit.Faker, check *expects) {
 		dbm.EXPECT().UpsertChatSystemPrompt(gomock.Any(), "").Return(nil).AnyTimes()
 		check.Args("").Asserts(rbac.ResourceDeploymentConfig, policy.ActionUpdate)

coderd/database/dbmetrics/querymetrics.go

@@ -1120,6 +1120,14 @@ func (m queryMetricsStore) GetChatFilesByIDs(ctx context.Context, ids []uuid.UUI
 	return r0, r1
 }
 
+func (m queryMetricsStore) GetChatIncludeDefaultSystemPrompt(ctx context.Context) (bool, error) {
+	start := time.Now()
+	r0, r1 := m.s.GetChatIncludeDefaultSystemPrompt(ctx)
+	m.queryLatencies.WithLabelValues("GetChatIncludeDefaultSystemPrompt").Observe(time.Since(start).Seconds())
+	m.queryCounts.WithLabelValues(httpmw.ExtractHTTPRoute(ctx), httpmw.ExtractHTTPMethod(ctx), "GetChatIncludeDefaultSystemPrompt").Inc()
+	return r0, r1
+}
+
 func (m queryMetricsStore) GetChatMessageByID(ctx context.Context, id int64) (database.ChatMessage, error) {
 	start := time.Now()
 	r0, r1 := m.s.GetChatMessageByID(ctx, id)
@@ -1208,6 +1216,14 @@ func (m queryMetricsStore) GetChatSystemPrompt(ctx context.Context) (string, err
 	return r0, r1
 }
 
+func (m queryMetricsStore) GetChatSystemPromptConfig(ctx context.Context) (database.GetChatSystemPromptConfigRow, error) {
+	start := time.Now()
+	r0, r1 := m.s.GetChatSystemPromptConfig(ctx)
+	m.queryLatencies.WithLabelValues("GetChatSystemPromptConfig").Observe(time.Since(start).Seconds())
+	m.queryCounts.WithLabelValues(httpmw.ExtractHTTPRoute(ctx), httpmw.ExtractHTTPMethod(ctx), "GetChatSystemPromptConfig").Inc()
+	return r0, r1
+}
+
 func (m queryMetricsStore) GetChatTemplateAllowlist(ctx context.Context) (string, error) {
 	start := time.Now()
 	r0, r1 := m.s.GetChatTemplateAllowlist(ctx)
@@ -4840,6 +4856,14 @@ func (m queryMetricsStore) UpsertChatDiffStatusReference(ctx context.Context, ar
 	return r0, r1
 }
 
+func (m queryMetricsStore) UpsertChatIncludeDefaultSystemPrompt(ctx context.Context, includeDefaultSystemPrompt bool) error {
+	start := time.Now()
+	r0 := m.s.UpsertChatIncludeDefaultSystemPrompt(ctx, includeDefaultSystemPrompt)
+	m.queryLatencies.WithLabelValues("UpsertChatIncludeDefaultSystemPrompt").Observe(time.Since(start).Seconds())
+	m.queryCounts.WithLabelValues(httpmw.ExtractHTTPRoute(ctx), httpmw.ExtractHTTPMethod(ctx), "UpsertChatIncludeDefaultSystemPrompt").Inc()
+	return r0
+}
+
 func (m queryMetricsStore) UpsertChatSystemPrompt(ctx context.Context, value string) error {
 	start := time.Now()
 	r0 := m.s.UpsertChatSystemPrompt(ctx, value)

coderd/database/dbmock/dbmock.go

@@ -2058,6 +2058,21 @@ func (mr *MockStoreMockRecorder) GetChatFilesByIDs(ctx, ids any) *gomock.Call {
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetChatFilesByIDs", reflect.TypeOf((*MockStore)(nil).GetChatFilesByIDs), ctx, ids)
 }
 
+// GetChatIncludeDefaultSystemPrompt mocks base method.
+func (m *MockStore) GetChatIncludeDefaultSystemPrompt(ctx context.Context) (bool, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "GetChatIncludeDefaultSystemPrompt", ctx)
+	ret0, _ := ret[0].(bool)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// GetChatIncludeDefaultSystemPrompt indicates an expected call of GetChatIncludeDefaultSystemPrompt.
+func (mr *MockStoreMockRecorder) GetChatIncludeDefaultSystemPrompt(ctx any) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetChatIncludeDefaultSystemPrompt", reflect.TypeOf((*MockStore)(nil).GetChatIncludeDefaultSystemPrompt), ctx)
+}
+
 // GetChatMessageByID mocks base method.
 func (m *MockStore) GetChatMessageByID(ctx context.Context, id int64) (database.ChatMessage, error) {
 	m.ctrl.T.Helper()
@@ -2223,6 +2238,21 @@ func (mr *MockStoreMockRecorder) GetChatSystemPrompt(ctx any) *gomock.Call {
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetChatSystemPrompt", reflect.TypeOf((*MockStore)(nil).GetChatSystemPrompt), ctx)
 }
 
+// GetChatSystemPromptConfig mocks base method.
+func (m *MockStore) GetChatSystemPromptConfig(ctx context.Context) (database.GetChatSystemPromptConfigRow, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "GetChatSystemPromptConfig", ctx)
+	ret0, _ := ret[0].(database.GetChatSystemPromptConfigRow)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// GetChatSystemPromptConfig indicates an expected call of GetChatSystemPromptConfig.
+func (mr *MockStoreMockRecorder) GetChatSystemPromptConfig(ctx any) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetChatSystemPromptConfig", reflect.TypeOf((*MockStore)(nil).GetChatSystemPromptConfig), ctx)
+}
+
 // GetChatTemplateAllowlist mocks base method.
 func (m *MockStore) GetChatTemplateAllowlist(ctx context.Context) (string, error) {
 	m.ctrl.T.Helper()
@@ -9074,6 +9104,20 @@ func (mr *MockStoreMockRecorder) UpsertChatDiffStatusReference(ctx, arg any) *go
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "UpsertChatDiffStatusReference", reflect.TypeOf((*MockStore)(nil).UpsertChatDiffStatusReference), ctx, arg)
 }
 
+// UpsertChatIncludeDefaultSystemPrompt mocks base method.
+func (m *MockStore) UpsertChatIncludeDefaultSystemPrompt(ctx context.Context, includeDefaultSystemPrompt bool) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "UpsertChatIncludeDefaultSystemPrompt", ctx, includeDefaultSystemPrompt)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// UpsertChatIncludeDefaultSystemPrompt indicates an expected call of UpsertChatIncludeDefaultSystemPrompt.
+func (mr *MockStoreMockRecorder) UpsertChatIncludeDefaultSystemPrompt(ctx, includeDefaultSystemPrompt any) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "UpsertChatIncludeDefaultSystemPrompt", reflect.TypeOf((*MockStore)(nil).UpsertChatIncludeDefaultSystemPrompt), ctx, includeDefaultSystemPrompt)
+}
+
 // UpsertChatSystemPrompt mocks base method.
 func (m *MockStore) UpsertChatSystemPrompt(ctx context.Context, value string) error {
 	m.ctrl.T.Helper()

coderd/database/querier.go

@@ -243,6 +243,11 @@ type sqlcQuerier interface {
 	GetChatDiffStatusesByChatIDs(ctx context.Context, chatIds []uuid.UUID) ([]ChatDiffStatus, error)
 	GetChatFileByID(ctx context.Context, id uuid.UUID) (ChatFile, error)
 	GetChatFilesByIDs(ctx context.Context, ids []uuid.UUID) ([]ChatFile, error)
+	// GetChatIncludeDefaultSystemPrompt preserves the legacy default
+	// for deployments created before the explicit include-default toggle.
+	// When the toggle is unset, a non-empty custom prompt implies false;
+	// otherwise the setting defaults to true.
+	GetChatIncludeDefaultSystemPrompt(ctx context.Context) (bool, error)
 	GetChatMessageByID(ctx context.Context, id int64) (ChatMessage, error)
 	GetChatMessagesByChatID(ctx context.Context, arg GetChatMessagesByChatIDParams) ([]ChatMessage, error)
 	GetChatMessagesByChatIDDescPaginated(ctx context.Context, arg GetChatMessagesByChatIDDescPaginatedParams) ([]ChatMessage, error)
@@ -254,6 +259,12 @@ type sqlcQuerier interface {
 	GetChatProviders(ctx context.Context) ([]ChatProvider, error)
 	GetChatQueuedMessages(ctx context.Context, chatID uuid.UUID) ([]ChatQueuedMessage, error)
 	GetChatSystemPrompt(ctx context.Context) (string, error)
+	// GetChatSystemPromptConfig returns both chat system prompt settings in a
+	// single read to avoid torn reads between separate site-config lookups.
+	// The include-default fallback preserves the legacy behavior where a
+	// non-empty custom prompt implied opting out before the explicit toggle
+	// existed.
+	GetChatSystemPromptConfig(ctx context.Context) (GetChatSystemPromptConfigRow, error)
 	// GetChatTemplateAllowlist returns the JSON-encoded template allowlist.
 	// Returns an empty string when no allowlist has been configured (all templates allowed).
 	GetChatTemplateAllowlist(ctx context.Context) (string, error)
@@ -942,6 +953,7 @@ type sqlcQuerier interface {
 	UpsertChatDesktopEnabled(ctx context.Context, enableDesktop bool) error
 	UpsertChatDiffStatus(ctx context.Context, arg UpsertChatDiffStatusParams) (ChatDiffStatus, error)
 	UpsertChatDiffStatusReference(ctx context.Context, arg UpsertChatDiffStatusReferenceParams) (ChatDiffStatus, error)
+	UpsertChatIncludeDefaultSystemPrompt(ctx context.Context, includeDefaultSystemPrompt bool) error
 	UpsertChatSystemPrompt(ctx context.Context, value string) error
 	UpsertChatTemplateAllowlist(ctx context.Context, templateAllowlist string) error
 	UpsertChatUsageLimitConfig(ctx context.Context, arg UpsertChatUsageLimitConfigParams) (ChatUsageLimitConfig, error)

coderd/database/queries.sql.go

@@ -17736,6 +17736,30 @@ func (q *sqlQuerier) GetChatDesktopEnabled(ctx context.Context) (bool, error) {
 	return enable_desktop, err
 }
 
+const getChatIncludeDefaultSystemPrompt = `-- name: GetChatIncludeDefaultSystemPrompt :one
+SELECT
+    COALESCE(
+        (SELECT value = 'true' FROM site_configs WHERE key = 'agents_chat_include_default_system_prompt'),
+        NOT EXISTS (
+            SELECT 1
+            FROM site_configs
+            WHERE key = 'agents_chat_system_prompt'
+                AND value != ''
+        )
+    ) :: boolean AS include_default_system_prompt
+`
+
+// GetChatIncludeDefaultSystemPrompt preserves the legacy default
+// for deployments created before the explicit include-default toggle.
+// When the toggle is unset, a non-empty custom prompt implies false;
+// otherwise the setting defaults to true.
+func (q *sqlQuerier) GetChatIncludeDefaultSystemPrompt(ctx context.Context) (bool, error) {
+	row := q.db.QueryRowContext(ctx, getChatIncludeDefaultSystemPrompt)
+	var include_default_system_prompt bool
+	err := row.Scan(&include_default_system_prompt)
+	return include_default_system_prompt, err
+}
+
 const getChatSystemPrompt = `-- name: GetChatSystemPrompt :one
 SELECT
 	COALESCE((SELECT value FROM site_configs WHERE key = 'agents_chat_system_prompt'), '') :: text AS chat_system_prompt
@@ -17748,6 +17772,37 @@ func (q *sqlQuerier) GetChatSystemPrompt(ctx context.Context) (string, error) {
 	return chat_system_prompt, err
 }
 
+const getChatSystemPromptConfig = `-- name: GetChatSystemPromptConfig :one
+SELECT
+    COALESCE((SELECT value FROM site_configs WHERE key = 'agents_chat_system_prompt'), '') :: text AS chat_system_prompt,
+    COALESCE(
+        (SELECT value = 'true' FROM site_configs WHERE key = 'agents_chat_include_default_system_prompt'),
+        NOT EXISTS (
+            SELECT 1
+            FROM site_configs
+            WHERE key = 'agents_chat_system_prompt'
+                AND value != ''
+        )
+    ) :: boolean AS include_default_system_prompt
+`
+
+type GetChatSystemPromptConfigRow struct {
+	ChatSystemPrompt           string `db:"chat_system_prompt" json:"chat_system_prompt"`
+	IncludeDefaultSystemPrompt bool   `db:"include_default_system_prompt" json:"include_default_system_prompt"`
+}
+
+// GetChatSystemPromptConfig returns both chat system prompt settings in a
+// single read to avoid torn reads between separate site-config lookups.
+// The include-default fallback preserves the legacy behavior where a
+// non-empty custom prompt implied opting out before the explicit toggle
+// existed.
+func (q *sqlQuerier) GetChatSystemPromptConfig(ctx context.Context) (GetChatSystemPromptConfigRow, error) {
+	row := q.db.QueryRowContext(ctx, getChatSystemPromptConfig)
+	var i GetChatSystemPromptConfigRow
+	err := row.Scan(&i.ChatSystemPrompt, &i.IncludeDefaultSystemPrompt)
+	return i, err
+}
+
 const getChatTemplateAllowlist = `-- name: GetChatTemplateAllowlist :one
 SELECT
 	COALESCE((SELECT value FROM site_configs WHERE key = 'agents_template_allowlist'), '') :: text AS template_allowlist
@@ -17983,6 +18038,28 @@ func (q *sqlQuerier) UpsertChatDesktopEnabled(ctx context.Context, enableDesktop
 	return err
 }
 
+const upsertChatIncludeDefaultSystemPrompt = `-- name: UpsertChatIncludeDefaultSystemPrompt :exec
+INSERT INTO site_configs (key, value)
+VALUES (
+    'agents_chat_include_default_system_prompt',
+    CASE
+        WHEN $1::bool THEN 'true'
+        ELSE 'false'
+    END
+)
+ON CONFLICT (key) DO UPDATE
+SET value = CASE
+    WHEN $1::bool THEN 'true'
+    ELSE 'false'
+END
+WHERE site_configs.key = 'agents_chat_include_default_system_prompt'
+`
+
+func (q *sqlQuerier) UpsertChatIncludeDefaultSystemPrompt(ctx context.Context, includeDefaultSystemPrompt bool) error {
+	_, err := q.db.ExecContext(ctx, upsertChatIncludeDefaultSystemPrompt, includeDefaultSystemPrompt)
+	return err
+}
+
 const upsertChatSystemPrompt = `-- name: UpsertChatSystemPrompt :exec
 INSERT INTO site_configs (key, value) VALUES ('agents_chat_system_prompt', $1)
 ON CONFLICT (key) DO UPDATE SET value = $1 WHERE site_configs.key = 'agents_chat_system_prompt'

coderd/database/queries/siteconfig.sql

@@ -137,6 +137,24 @@ SELECT
 SELECT
 	COALESCE((SELECT value FROM site_configs WHERE key = 'agents_chat_system_prompt'), '') :: text AS chat_system_prompt;
 
+-- GetChatSystemPromptConfig returns both chat system prompt settings in a
+-- single read to avoid torn reads between separate site-config lookups.
+-- The include-default fallback preserves the legacy behavior where a
+-- non-empty custom prompt implied opting out before the explicit toggle
+-- existed.
+-- name: GetChatSystemPromptConfig :one
+SELECT
+    COALESCE((SELECT value FROM site_configs WHERE key = 'agents_chat_system_prompt'), '') :: text AS chat_system_prompt,
+    COALESCE(
+        (SELECT value = 'true' FROM site_configs WHERE key = 'agents_chat_include_default_system_prompt'),
+        NOT EXISTS (
+            SELECT 1
+            FROM site_configs
+            WHERE key = 'agents_chat_system_prompt'
+                AND value != ''
+        )
+    ) :: boolean AS include_default_system_prompt;
+
 -- name: UpsertChatSystemPrompt :exec
 INSERT INTO site_configs (key, value) VALUES ('agents_chat_system_prompt', $1)
 ON CONFLICT (key) DO UPDATE SET value = $1 WHERE site_configs.key = 'agents_chat_system_prompt';
@@ -167,6 +185,38 @@ WHERE site_configs.key = 'agents_desktop_enabled';
 SELECT
 	COALESCE((SELECT value FROM site_configs WHERE key = 'agents_template_allowlist'), '') :: text AS template_allowlist;
 
+-- GetChatIncludeDefaultSystemPrompt preserves the legacy default
+-- for deployments created before the explicit include-default toggle.
+-- When the toggle is unset, a non-empty custom prompt implies false;
+-- otherwise the setting defaults to true.
+-- name: GetChatIncludeDefaultSystemPrompt :one
+SELECT
+    COALESCE(
+        (SELECT value = 'true' FROM site_configs WHERE key = 'agents_chat_include_default_system_prompt'),
+        NOT EXISTS (
+            SELECT 1
+            FROM site_configs
+            WHERE key = 'agents_chat_system_prompt'
+                AND value != ''
+        )
+    ) :: boolean AS include_default_system_prompt;
+
+-- name: UpsertChatIncludeDefaultSystemPrompt :exec
+INSERT INTO site_configs (key, value)
+VALUES (
+    'agents_chat_include_default_system_prompt',
+    CASE
+        WHEN sqlc.arg(include_default_system_prompt)::bool THEN 'true'
+        ELSE 'false'
+    END
+)
+ON CONFLICT (key) DO UPDATE
+SET value = CASE
+    WHEN sqlc.arg(include_default_system_prompt)::bool THEN 'true'
+    ELSE 'false'
+END
+WHERE site_configs.key = 'agents_chat_include_default_system_prompt';
+
 -- name: GetChatWorkspaceTTL :one
 -- Returns the global TTL for chat workspaces as a Go duration string.
 -- Returns "0s" (disabled) when no value has been configured.