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

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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.
This commit is contained in:
Michael Suchacz
2026-03-26 13:32:41 +01:00
committed by GitHub
parent d175e799da
commit 4f063cdc47
16 changed files with 895 additions and 68 deletions
Download Patch File Download Diff File Expand all files Collapse all files
coderd/database/dbmock/dbmock.go
+44
View File
@@ -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()