W7 lane retire — todlando, 2026-09-24. Lane feat/331-w7-auto-apply landed as main a1f4901e (doyle ff).

POOL: C:\Users\decid\Documents\projects\spt-core\.worktrees\w7-updater\target (the worktree's own default target; no CARGO_TARGET_DIR).
Release: prebuilt xtask (copied from main's target/debug/xtask.exe to the session scratchpad) `pool-release --pool target` rc 0
  -> "pool target released (still owned by ...w7-updater)".

WRITER CENSUS, read BEFORE rm (2026-09-24T19:59:56Z):
  rust-analyzer.exe 50072 + proc-macro-srv 52172; rust-analyzer.exe 37184 + proc-macro-srv 54188;
  Runner.Worker.exe 38932 (a CI job LIVE on this box -> it writes the volume; the delta below is CONFOUNDED).
  No cargo/rustc/nextest.

OUTBOUND: Get-Item -Force target -> "Directory, NotContentIndexed" (real dir, not a junction).
INBOUND: no ReparsePoint under .worktrees (depth 1) targets w7-updater\target; main's target is a plain Directory.

THREE NUMBERS (2026-09-24T20:00:07Z, before rm):
  apparent  (du -sb --apparent-size): 15,803,698,211 B
  allocated (du -sB1):                15,846,772,736 B
  escaped hard links (per-inode):     0 inodes, 0 B
  expected reclaim ~= allocated - escaped = 15,846,772,736 B

FREE SPACE (C:):
  before 2026-09-24T20:00:07Z: 103,244,025,856 B
  rm -rf target: 20:03:15Z -> 20:03:27Z, rc 0, target absent afterwards
  after  2026-09-24T20:03:27Z: 118,263,013,376 B
  delta: 15,018,987,520 B
  gap vs expected: 827,785,216 B LESS freed than allocated.
  UNEXPLAINED. Runner.Worker 38932 was live across the window, so the delta cannot be read
  as the rm's alone. No mechanism is assigned.

WORKTREE: `git worktree remove .worktrees/w7-updater` (run from the project root) removed the registration,
  then failed to delete the dir with "Permission denied" (the dir was EMPTY). The session's own cwd had
  been that dir; after it moved, `rmdir` rc 0; dir absent. git worktree list: no w7-updater.

Earlier volume attribution this session: 142.7->65.4 GB step = 72.2 GB doyle's gate pool .worktrees/gate-w7
  (doyle measured: allocated 72,199,706,624 B / apparent 72,132,828,967 B), ~5 GB remainder unattributed;
  65.4->51.9 GB step ~= this pool (14.7 GB allocated at that time).