If there are multiple manifest files in an OWNERS file, it would be convenient to use a wildcard to cover all of them:

per-file *manifest.json=set noparent
per-file *manifest.json=file://ipc/SECURITY_OWNERS

Example: https://crrev.com/c/1195892/5/services/service_manager/tests/service_mana
ger/OWNERS#19

There are rules for various IPC-related files in the presubmit script:

https://cs.chromium.org/chromium/src/PRESUBMIT.py?l=1939

Maybe we could add a *manifest.json rule there?
 

If there are multiple manifest files in an OWNERS file, it would be convenient to use a wildcard to cover all of them:

per-file *manifest.json=set noparent
per-file *manifest.json=file://ipc/SECURITY_OWNERS

Example: https://crrev.com/c/1195892/5/services/service_manager/tests/service_manager/OWNERS#19

There are rules for various IPC-related files in the presubmit script:

https://cs.chromium.org/chromium/src/PRESUBMIT.py?l=1939

Maybe we could add a *manifest.json rule there?