export type OTelExporterType = 'otlp-grpc' | 'otlp-http' | 'console' | 'file';
export type OTelEnabledVia = 'policy' | 'envVar' | 'setting' | 'otlpEndpointEnvVar' | 'dbSpanExporterOnly' | 'disabled';
/** Default OTLP endpoint used when no env var or setting overrides it. */
export declare const DEFAULT_OTLP_ENDPOINT = "http://localhost:4318";
export interface OTelConfig {
    readonly enabled: boolean;
    /** True when OTel was enabled via setting/env var, not just implied by dbSpanExporter. */
    readonly enabledExplicitly: boolean;
    /** How OTel was enabled — used for telemetry to track adoption channels. */
    readonly enabledVia: OTelEnabledVia;
    readonly exporterType: OTelExporterType;
    readonly otlpEndpoint: string;
    readonly otlpProtocol: 'grpc' | 'http/json' | 'http/protobuf';
    readonly captureContent: boolean;
    /**
     * Maximum size (in characters) for free-form content attributes (prompts,
     * tool args, etc.). A value of `0` disables truncation entirely (the
     * default), matching the OTel spec's `AttributeValueLengthLimit` default of
     * `Infinity`. Set to a positive value when targeting backends that cap
     * per-attribute size to keep OTLP batches under the backend limit; consult
     * the backend's documentation for the appropriate value.
     */
    readonly maxAttributeSizeChars: number;
    readonly fileExporterPath?: string;
    readonly dbSpanExporter: boolean;
    readonly logLevel: 'trace' | 'debug' | 'info' | 'warn' | 'error';
    readonly httpInstrumentation: boolean;
    readonly serviceName: string;
    readonly serviceVersion: string;
    readonly sessionId: string;
    readonly resourceAttributes: Record<string, string>;
    /**
     * Extra OTLP request headers (e.g. auth tokens) applied directly to the exporter. Carried
     * out-of-band from process env so secrets never leak into spawned tool subprocesses.
     */
    readonly headers: Record<string, string>;
}
export interface OTelConfigInput {
    env: Record<string, string | undefined>;
    settingEnabled?: boolean;
    settingExporterType?: OTelExporterType;
    settingOtlpEndpoint?: string;
    settingCaptureContent?: boolean;
    settingMaxAttributeSizeChars?: number;
    settingOutfile?: string;
    settingDbSpanExporter?: boolean;
    /** OTLP wire protocol mirroring `OTEL_EXPORTER_OTLP_PROTOCOL` (`http/json`, `http/protobuf`, `grpc`). */
    settingProtocol?: string;
    policyEnabled?: boolean;
    policyExporterType?: OTelExporterType;
    policyOtlpEndpoint?: string;
    policyCaptureContent?: boolean;
    policyOutfile?: string;
    /** Enterprise-managed OTLP wire protocol (raw `telemetry.protocol`). */
    policyProtocol?: string;
    /** Service name from VS Code setting (`github.copilot.chat.otel.serviceName`). */
    settingServiceName?: string;
    /** Enterprise-managed `service.name` (raw `telemetry.serviceName`). */
    policyServiceName?: string;
    /** Resource attributes from VS Code setting (`github.copilot.chat.otel.resourceAttributes`). */
    settingResourceAttributes?: Record<string, string>;
    /** Enterprise-managed resource attributes (raw `telemetry.resourceAttributes`). */
    policyResourceAttributes?: Record<string, string>;
    /** OTLP headers from VS Code setting (`github.copilot.chat.otel.headers`). */
    settingHeaders?: Record<string, string>;
    /** Enterprise-managed OTLP headers (raw `telemetry.headers`). */
    policyHeaders?: Record<string, string>;
    extensionVersion: string;
    sessionId: string;
    vscodeTelemetryLevel?: string;
}
/**
 * Resolve OTel configuration with layered precedence:
 * 1. Enterprise policy values from managed settings (highest)
 * 2. COPILOT_OTEL_* env vars
 * 3. OTEL_EXPORTER_OTLP_* standard env vars
 * 4. VS Code settings
 * 5. Defaults (lowest)
 */
export declare function resolveOTelConfig(input: OTelConfigInput): OTelConfig;
//# sourceMappingURL=otelConfig.d.ts.map