- the first ubuntu-26.04 unit run failed 41 log-reading cases: 239 raw cores from intentional aborts filled /tmp, and the library's log writes then failed silently
- setup-test-runner pipes cores through a zstd handler that keeps honouring each process's RLIMIT_CORE; steps keep their ulimit -c and lose their own core_pattern lines
- the unit job prints free disk space and the core count after its run
- unit, integration and integration-verify ctest run at -j nproc; the same labels already run at -j in the split lanes, with the same names and results
- build-linux, -split and -verify also publish the library (and the server image) alone; the retrace legs load nothing else, yet downloaded and unpacked the 0.5-0.8 GB test runtime
- build-retrace no longer waits for build-linux: it fetched the runtime only to test -f a path configure does not read
- every branch saves its own rolling ccache entry, deleting only its own old one (--ref); only dev saved, and dev has not run since the key rename, so every build was cold
- !cancelled() replaces job-level always() on the retrace, summary and skip-census jobs: a superseded run kept starting its pending legs and held the next run in the concurrency group for up to 154 minutes
- retrace and retrace-split run 8 legs at a time, not 4; the cap dates from per-leg LFS checkouts
- apt requests time out after 30 s and retry 3 times; install steps time out at 15 minutes, not 45
- the APK trace case matrix no longer waits for the build, which it does not read
- retrace-split prepares its metadata once, after the split library is unpacked
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