RCH — remote compilation specialist

RCH can offload one explicit compilation command or inspect the remote compiler path. This skill reports what happened; it does not govern retries or repair.

Staged diagnosis works because the offload pipeline fails in order — availability, configuration, hook, classification, sync, remote compile, worker pressure — so the first failing stage localizes the fault and every later stage is noise until it passes. Remediate in irreversibility order: read-only probes and config inspection before daemon restarts, restarts before cleanup, and destructive cleanup or worker mutation only with explicit caller authority.

Named failure mode — green-local blindness: a passing [RCH] local (...) build read as offload success; the local fallback hid that the remote claim was never proved.

Anti-pattern: re-running the build hoping the fallback reason disappears. Corrective: read the recorded fallback reason and fix that stage; the pipeline fails deterministically, not moodily.