test-output-prune

name	test-output-prune
description	Delete old `yyyyMMdd` test-output date folders under `%TEMP%/TianWen.Lib.Tests/` and `%TEMP%/FC.SDK.Raw.Tests/`, keeping only the N most recent (default 3). These folders accumulate quickly because the test fixtures dump TIFFs/PNGs on every run; pruning keeps disk usage in check. Use when the user asks to clean up, prune, delete old, free disk, or trim test outputs.

Usage:

/test-output-prune
/test-output-prune --keep 5
/test-output-prune --dry-run
/test-output-prune --root <path>

Deletes every yyyyMMdd subdirectory under each test-output root except the most-recent --keep N (default 3). Pass --dry-run to print what would be deleted without touching the filesystem. Pass --root <path> to scope to a single test-output root.

Output is a per-root summary:

TianWen.Lib.Tests:  keeping 3 of 8
  KEEP: 20260513 (12.4 MB)
  KEEP: 20260512 (10.1 MB)
  KEEP: 20260511 (5.6 MB)
  DELETE: 20260510 (4.2 MB)
  DELETE: 20260509 (3.8 MB)
  DELETE: 20260508 (2.1 MB)
  ...

FC.SDK.Raw.Tests:  keeping 3 of 4
  KEEP: 20260513 (53.4 MB)
  ...
  DELETE: 20260510 (27.6 MB)

Total freed: 47.8 MB across 5 directories

The skill is naturally idempotent — running it twice in a row is a no-op after the first run. Companion to /test-image-diff (which expects at least two date folders to compare; default --keep 3 preserves enough history for the diff to work and a bit of cushion).

Implementation: python .claude/skills/test-output-prune/prune.py [args...]. Stdlib only — no Pillow/numpy needed.