We are trying to track down some build failures that started happening only in our Jenkins CI environment. error: Failed to decode version info for '/Applications/Xcode.app/Contents/Developer/usr/bin/actool': The data couldn’t be read because it is missing. (stdout: '<?xml version="1.0" encoding="UTF-8"?> [2025-07-30T19:21:18.479Z] <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> [2025-07-30T19:21:18.479Z] <plist version="1.0"> [2025-07-30T19:21:18.479Z] <dict> [2025-07-30T19:21:18.479Z] <key>com.apple.ibtool.version</key> [2025-07-30T19:21:18.479Z] <dict> [2025-07-30T19:21:18.479Z] <key>bundle-version</key> [2025-07-30T19:21:18.479Z] <string>24112</string> [2025-07-30T19:21:18.479Z] <key>short-bundle-version</key> [2025-07-30T19:21:18.479Z] <string>26.0</string> [2025-07-30T19:21:18.479Z] </dict> [2025-07-30T19:21:18.479Z] </dict> [2025-07-30T19:21:18.479Z] </plist> [2025-07-30T19:21:18.479Z] ', stderr: '' Key facts we've noted: Locally I cannot reproduce the problem We did not see this problem with previous Xcode 26 betas If I remote into the machine and run build commands from the command line I cannot reproduce the problem The very first build succeeds, every build after that on this machine fails from jenkins actool --version is spitting out the version information for ibtool, but only in the context of running from a jenkins agent. If I run this locally or if I remote into the CI machine and run this from the terminal I cannot reproduce this behavior. Command line tools appear to be installed, xcode-select --install fails if I try to do it from the command line. We've tried to recreate the build agents for this jenkins environment exactly as they were for all previous betas and xcode versions, and still get this behavior.

Until Xcode 16 xcresulttool had a 'formatDescription' subcommand and/or --format flag that output a schema for what to expect from 'get object' subcommands. With Xcode 16 all of the old format and utilities are apparently deprecated, and require a --legacy flag be passed to use the deprecated utilities and format. There are new utilities like 'xcrun xcresulttool get test-results --path ' however, no format us published as far as I can tell. If we are going to move forward with these new utilities we need a schema published so that we can reasonably track deltas as it evolves and so that we have the object of generating model objects from this schema. Any insight?