re: pre-register F6's numbers for an out-of-sample boot

Every F5/F6 figure comes from captures taken for other purposes and
re-analysed after the reader and three labels were corrected. None has been
tested out of sample. Six predictions registered before the capture, five of
them checkable by check_labels.py, which now takes --cap NAME=path.

Prediction 6 is the one already got wrong once (0.057 against ptcopyright
instead of 0.14 against the real plate), and is stated so a landing near
0.057 would show the correction itself was wrong.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Jc4pciRArGHfxGGhEbwp5t

tools/re-capture/check_labels.py

@@ -38,6 +38,14 @@ def declared_alpha(t):
 
 CAPS = {'f6': '/sylph-home/re/f6/xenia_re_ui_draws_01.log',
         'f6b': '/sylph-home/re/f6b/xenia_re_ui_draws_01.log'}
+# `--cap NAME=/path/to/log` replaces the set, for testing a fresh capture
+# out-of-sample against predictions registered before it was taken.
+_ov = [a for a in sys.argv if a.startswith('--cap')]
+if _ov:
+    i = sys.argv.index(_ov[0])
+    spec = sys.argv[i+1] if _ov[0] == '--cap' else _ov[0].split('=',1)[1]
+    k, v = spec.split('=', 1)
+    CAPS = {k: v}
 SWEEP_PAGE = '8154'
 PTCOPY_X = (-0.54, 0.54, 0.54, -0.54)