[secsovereign]

Summary

Add early disk cleanup steps to the Test and Fuzz CI jobs to prevent ENOSPC failures on self-hosted runners before heavy cargo builds begin.

Problem

Run 37505615506 failed on zeus-workstation with No space left on device (os error 28) while unpacking crates into CARGO_HOME=/mnt/data/github-runner/zeus-workstation/_work/_temp/cargo.

Key observation: The host root filesystem was only 48% full (/dev/mapper/ArchinstallVg-root 148G 67G 74G 48% /), so this is a volume-level issue on /mnt/data, not a host disk expansion issue. The existing failure dump only ran df -h /, missing the actual full volume.

Solution

Add an "Early disk cleanup" step at the start of Test and Fuzz jobs (before cache restoration / cargo test / fuzz build) that frees:

• Stale cargo registry/src and git/checkouts under RUNNER_TEMP/cargo (the isolated CARGO_HOME used by this workflow)
• Sibling run directories under BLVM_RUNNER_DATA_ROOT (same cleanup pattern as Setup job and late Test cleanup)
• Bloated runner-cache/target directories (when >10GB, prune entries >60min old)
• Stale fuzz/target artifacts from prior runs (Fuzz job only)

Also hardens the "Dump disk usage on failure" step in Test to report:

• /mnt/data volume (where the ENOSPC actually occurred)
• RUNNER_TEMP, CARGO_HOME, BLVM_RUNNER_DATA_ROOT paths and sizes
• Better diagnostic info for future disk pressure debugging

Notes

• Mirrors cleanup patterns already present in this workflow (Setup's "Emergency pre-flight disk cleanup", Test's late "Clean test binaries and stale run dirs")
• Runs before heavy work starts, so the job can begin with free space
• Does not touch PR fix(ci): use REPO_ACCESS_TOKEN for release tags when workflows change #17 (release-tag fix) or #46 (soft parks)
• No Rust source changes
• Josh is not needed for host disk expansion — this is a per-volume cleanup issue

  

[secsovereign]

OK once marked ready + CI green on this branch (and after merge, confirm main Test/Fuzz no longer ENOSPC on /mnt/data).

Looks right: early cleanup before heavy cargo in Test and Fuzz; frees RUNNER_TEMP/cargo registry/src + git/checkouts (the ENOSPC path), sibling run dirs under BLVM_RUNNER_DATA_ROOT, and bloated runner-cache targets; failure dump now includes /mnt/data + key env paths. Fuzz fuzz/target cleanup moved earlier (duplicate late step removed). Soft parks / #46 held; #17 rebase still after main is green.