main
chore: repository hygiene pass
demo: reframe the ablation around substance — the note grounds the challenge, it doesn't find the plant
docs: correct the signing-key claims to match shipped behavior; add signing how-to
signing: add sign key-dir/key-path flags; document the two artifacts + off-machine cert ceremony
repo-2.0: Persistent naming, drop auto_capture, honest multi-agent doc, demo boots clean