The CI gate catches spec drift at merge time; these two additions catch it
at write time, which is where "developer didn't read the spec first"
actually happens.
CLAUDE.md (Song Formats): a spec-is-sacrosanct paragraph next to the spec
pointer — the spec defines the format, the app implements it, any new
manifest key/file/directory lands in the spec first via the FEP process,
and the gate has no in-repo bypass. AI agents and contributors both hit
this while writing feedpak-touching code, not after CI reddens.
.github/pull_request_template.md (new — the repo had only issue templates):
a feedpak-surface section requiring either "doesn't touch pack I/O" or a
link to the landed FEP + the .feedpak-spec-ref bump, plus the standing
changelog/tests/DCO checklist.
Signed-off-by: topkoa <topkoa@gmail.com>
