fix(coding-agent): add OpenRouter attribution headers

closes #3414

packages/coding-agent/src/modes/interactive/interactive-mode.ts

@@ -65,6 +65,7 @@ import { formatMissingSessionCwdPrompt, MissingSessionCwdError } from "../../cor
 import { type SessionContext, SessionManager } from "../../core/session-manager.js";
 import { BUILTIN_SLASH_COMMANDS } from "../../core/slash-commands.js";
 import type { SourceInfo } from "../../core/source-info.js";
+import { isInstallTelemetryEnabled } from "../../core/telemetry.js";
 import type { TruncationResult } from "../../core/tools/truncate.js";
 import { getChangelogPath, getNewEntries, parseChangelog } from "../../utils/changelog.js";
 import { copyToClipboard } from "../../utils/clipboard.js";
@@ -154,11 +155,6 @@ function isAnthropicSubscriptionAuthKey(apiKey: string | undefined): boolean {
 	return typeof apiKey === "string" && apiKey.startsWith("sk-ant-oat");
 }
 
-function isTruthyEnvFlag(value: string | undefined): boolean {
-	if (!value) return false;
-	return value === "1" || value.toLowerCase() === "true" || value.toLowerCase() === "yes";
-}
-
 function isUnknownModel(model: Model<any> | undefined): boolean {
 	return !!model && model.provider === "unknown" && model.id === "unknown" && model.api === "unknown";
 }
@@ -844,10 +840,7 @@ export class InteractiveMode {
 			return;
 		}
 
-		const telemetryEnv = process.env.PI_TELEMETRY;
-		const telemetryEnabled =
-			telemetryEnv !== undefined ? isTruthyEnvFlag(telemetryEnv) : this.settingsManager.getEnableInstallTelemetry();
-		if (!telemetryEnabled) {
+		if (!isInstallTelemetryEnabled(this.settingsManager)) {
 			return;
 		}