in vscode-extension/src/logging.ts [140:151]
public startNewLog(minimumLogLevel = "Normal"): void {
this.MinimumLogLevel = this.logLevelNameToValue(minimumLogLevel.trim());
this.logSessionPath =
path.resolve(
this.logBasePath,
`${Math.floor(Date.now() / 1000)}-${vscode.env.sessionId}`);
this.logFilePath = this.getLogFilePath("azps-tools");
utils.ensurePathExists(this.logSessionPath);
}