Blacksite/.agents/skills/blacksite-build-storage/SKILL.md

2.0 KiB

name description
blacksite-build-storage Keep Blacksite Cargo and package build artifacts within a configured disk budget by selecting stable build lanes, measuring target/build directories, pruning only verified disposable caches, and preserving warm development performance. Use before or after heavy builds, when disk use grows, or when compile performance degrades from artifact accumulation.

Blacksite build storage

Read .codex/workflow.toml and the storage policy. Use scripts/codex/cargo_lane.py for every Cargo invocation and scripts/codex/build_storage.py for measurement or cleanup.

Trigger this Skill for candidate, all-feature, all-target, package, hot-reload, full-debug, cache-growth, low-space, unexplained rebuild, and cleanup requests.

  • Keep one persistent dev lane. Candidate, hot-reload, full-debug, cross-target, and package lanes are exceptional and disposable.
  • Use stable separate CARGO_BUILD_BUILD_DIR when supported; otherwise use bounded external CARGO_TARGET_DIR lanes.
  • Account for repository final targets, external intermediates, package caches, Cargo timings/docs, free space, and an already-enabled sccache.
  • Run storage preflight/postflight around heavy gates. When configured, pressure may prune only expired disposable lanes after their complete checked plan is printed and flushed.
  • Require valid sentinels, canonical workspace identity, no symlink traversal, and no active Cargo/rustc/linker/packager before deletion.
  • Delete whole managed lanes only. Never delete individual Cargo internal files and never install cleanup/cache tools without explicit approval.
  • Every apply prints and flushes its complete byte-counted checked plan before deletion begins.
  • Preserve candidate binaries/packages and evidence outside the disposable lane, then establish the generation-bound marker with build_storage.py mark-candidate-preserved; an absent, stale, or hash-mismatched marker blocks candidate deletion.
  • Report reclaimed bytes plus expected cold-build impact.