The attribution and session-link rules in docs/agents/contributing.md
are decided by the text of a commit message alone, and until now the
only reader was a human scrolling git log. That reader is expensive and
misses things: one open pull request carried eight commits naming a
model in the attribution trailer, another four, all found by hand after
the work was otherwise done. Every one of them cost a review round to
report and a rebase to fix.
The check reads what is written and requires nothing, so a commit with
no trailer passes and a merge commit that carries none passes with it.
A trailer that exists and is wrong fails, naming the commit and the
accepted form. It runs over the commits between the merge base and the
head, so it never reaches the history on main, roughly a quarter of
which predates the rule. A backport branch is exempt: its commits are
cherry-picked verbatim and their messages are not the author's to
rewrite.
Assisted-by: LLM
Signed-off-by: Aleksei Sviridkin <f@lex.la>
