function asProviderConfig(value: unknown): SpeechProviderConfig {

return typeof value === "object" && value !== null && !Array.isArray(value)

? // oxlint-disable-next-line typescript/no-unsafe-type-assertion -- Speech provider configs are open JSON records normalized at the plugin boundary.

(value as SpeechProviderConfig)

? (value as SpeechProviderConfig)

: {};

}

function asProviderConfigMap(value: unknown): Record<string, unknown> {

return typeof value === "object" && value !== null && !Array.isArray(value)

? // oxlint-disable-next-line typescript/no-unsafe-type-assertion -- TTS provider config maps are open JSON records keyed by provider id.

(value as Record<string, unknown>)

? (value as Record<string, unknown>)

: {};

}

if (!existsSync(prefsPath)) {

return {};

}

// oxlint-disable-next-line typescript/no-unsafe-type-assertion -- User prefs are trusted local JSON and unknown keys are ignored by readers.

return JSON.parse(readFileSync(prefsPath, "utf8")) as TtsUserPrefs;

} catch {

return {};

`TTS provider "${selectedProvider}" ignored the requested model or voice overrides.`,

);

}

if (!providerOverrides) {

throw new Error(`TTS provider "${selectedProvider}" did not return talk overrides.`);

}

const overridesRecord = providerOverrides as SpeechProviderOverrides;

return {

provider: selectedProvider,

providerOverrides: {

[provider.id]: providerOverrides,

[provider.id]: overridesRecord,

},

};

}

config,

provider: resolvedProvider.provider,

});

const synthesizeTelephony = resolvedProvider.provider.synthesizeTelephony;

if (!synthesizeTelephony) {

throw new Error(`TTS provider "${resolvedProvider.provider.id}" lost telephony support`);

}

const synthesizeTelephony = resolvedProvider.provider.synthesizeTelephony as NonNullable<

typeof resolvedProvider.provider.synthesizeTelephony

>;

const prepared = await prepareSpeechSynthesis({

provider: resolvedProvider.provider,

text: params.text,

textForAudio = `${textForAudio.slice(0, config.maxTextLength - 3)}...`;

}

} catch (err) {

// oxlint-disable-next-line typescript/no-unsafe-type-assertion -- Only the message is used for verbose diagnostics after a caught summarizer failure.

const error = err as Error;

logVerbose(`TTS: summarization failed, truncating instead: ${error.message}`);

textForAudio = `${textForAudio.slice(0, maxLength - 3)}...`;