The property name set via `app-json:set` is `appjson-path`, but the matching read-back flags on `app-json:report` were named `--app-json-selected`, `--app-json-global-selected`, and `--app-json-computed-selected`. The mismatch meant `dokku app-json:report <app> --app-json-appjson-path` (the form already documented in deployment-tasks.md) was rejected as an invalid flag, and the `--format json` output advertised keys that did not correspond to any settable property. The flags and JSON keys are renamed to `--app-json-appjson-path`, `--app-json-global-appjson-path`, and `--app-json-computed-appjson-path` so that the property name round-trips through set and report.
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