The R11 self-catch existed only in a commit message and a script comment. §5's
own rule says the file carries the finding, so it belongs in the retro.
Writing the BLOCKED.md pointer, the obvious form -- git show || { echo missing;
exit 4; } -- prints "the file is missing" for a file it has just printed in full,
because piping into head closes the pipe and git dies of SIGPIPE. An error path
that fires on success is worth no more than one that never fires.
Same family as the port's MIX default and my vertex cap, with one difference
worth keeping: both of those needed an outside observer, and this one did not,
because all four paths were exercised rather than the happy one. A script with
three failure branches has three tests and they cost a line each.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v
b0bf54b4a0