262.*, its bundled Kotlin plugin, and its
Java 25 JBR. The installer rejects an IDEA release line without a matching
Kast plugin.
Tool schemas and exact
ref values are bound to their installed runtime
and admitted workspace. Rediscover tools after an upgrade; search again
when a reference is stale.
The Codex App Server integration remains a preview. See the
source-backed compatibility record
for its tested client boundary.