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fix: Fix default configs always being disabled #965

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merged 2 commits into from
Oct 24, 2025
Merged

fix: Fix default configs always being disabled #965

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9329790
fix: Fix default configs always being disabled
jsonbailey Oct 24, 2025
4be19fa
make method static
jsonbailey Oct 24, 2025
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26 changes: 20 additions & 6 deletions packages/sdk/server-ai/__tests__/LDAIClientImpl.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -127,7 +127,14 @@ it('passes the default value to the underlying client', async () => {
enabled: true,
};

mockLdClient.variation.mockResolvedValue(defaultValue);
const expectedLDFlagValue = {
_ldMeta: { enabled: true },
model: defaultValue.model,
messages: defaultValue.messages,
provider: defaultValue.provider,
};

mockLdClient.variation.mockResolvedValue(expectedLDFlagValue);

const result = await client.config(key, testContext, defaultValue);

Expand All @@ -136,11 +143,11 @@ it('passes the default value to the underlying client', async () => {
messages: defaultValue.messages,
provider: defaultValue.provider,
tracker: expect.any(Object),
enabled: false,
enabled: defaultValue.enabled,
toVercelAISDK: expect.any(Function),
});

expect(mockLdClient.variation).toHaveBeenCalledWith(key, testContext, defaultValue);
expect(mockLdClient.variation).toHaveBeenCalledWith(key, testContext, expectedLDFlagValue);
});

// New agent-related tests
Expand Down Expand Up @@ -253,7 +260,14 @@ it('passes the default value to the underlying client for single agent', async (
enabled: true,
};

mockLdClient.variation.mockResolvedValue(defaultValue);
const expectedLDFlagValue = {
_ldMeta: { enabled: defaultValue.enabled },
model: defaultValue.model,
provider: defaultValue.provider,
instructions: defaultValue.instructions,
};

mockLdClient.variation.mockResolvedValue(expectedLDFlagValue);

const result = await client.agent(key, testContext, defaultValue);

Expand All @@ -262,10 +276,10 @@ it('passes the default value to the underlying client for single agent', async (
instructions: defaultValue.instructions,
provider: defaultValue.provider,
tracker: expect.any(Object),
enabled: false,
enabled: defaultValue.enabled,
});

expect(mockLdClient.variation).toHaveBeenCalledWith(key, testContext, defaultValue);
expect(mockLdClient.variation).toHaveBeenCalledWith(key, testContext, expectedLDFlagValue);
});

it('returns multiple agents config with interpolated instructions', async () => {
Expand Down
37 changes: 29 additions & 8 deletions packages/sdk/server-ai/src/LDAIClientImpl.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -69,12 +69,31 @@ export class LDAIClientImpl implements LDAIClient {
return Mustache.render(template, variables, undefined, { escape: (item: any) => item });
}

private _toLDFlagValue(defaultValue: LDAIDefaults | LDAIAgentDefaults): {
_ldMeta: { enabled: boolean };
model?: LDModelConfig;
messages?: LDMessage[];
provider?: LDProviderConfig;
instructions?: string;
} {
return {
_ldMeta: { enabled: defaultValue.enabled ?? false },
model: defaultValue.model,
messages: 'messages' in defaultValue ? defaultValue.messages : undefined,
provider: defaultValue.provider,
instructions: 'instructions' in defaultValue ? defaultValue.instructions : undefined,
};
}
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@tanderson-ld tanderson-ld Oct 24, 2025

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This could be static. Does it need to be defined on LDAIClientImpl?

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@jsonbailey jsonbailey Oct 24, 2025

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Ideally this would be defined in api/config as a utility method but this could create a circular dependency. I wanted to avoid any breaking changes to the SDK for this.

Current flow:

  • api/agents → imports from api/config (line 1 in LDAIAgent.ts)
  • api/config → would need to import from api/agents (for LDAIAgentDefaults)

This creates a cycle:

  • api/agents → api/config → api/agents ❌


private async _evaluate(
key: string,
context: LDContext,
defaultValue: LDAIDefaults,
): Promise<EvaluationResult> {
const value: VariationContent = await this._ldClient.variation(key, context, defaultValue);
// Convert default value to LDFlagValue format
const ldFlagValue = this._toLDFlagValue(defaultValue);

const value: VariationContent = await this._ldClient.variation(key, context, ldFlagValue);

const tracker = new LDAIConfigTrackerImpl(
this._ldClient,
Expand Down Expand Up @@ -109,11 +128,13 @@ export class LDAIClientImpl implements LDAIClient {
defaultValue: LDAIAgentDefaults,
variables?: Record<string, unknown>,
): Promise<LDAIAgent> {
const { tracker, enabled, model, provider, instructions } = await this._evaluate(
key,
context,
defaultValue,
);
const {
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@jsonbailey jsonbailey Oct 24, 2025

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this is just a consistency formatting change to align with how we format in the config method.

tracker,
enabled,
model,
provider: configProvider,
instructions,
} = await this._evaluate(key, context, defaultValue);

const agent: LDAIAgent = {
tracker,
Expand All @@ -126,8 +147,8 @@ export class LDAIClientImpl implements LDAIClient {
agent.model = { ...model };
}

if (provider) {
agent.provider = { ...provider };
if (configProvider) {
agent.provider = { ...configProvider };
}

const allVariables = { ...variables, ldctx: context };
Expand Down