versioned prompt store with diffable renders and eval pins. prompts are code, treat them like it.
store: refuse saves that lower the pinned eval score #7
a prompt edit that scores worse than its pin should not save silently. proposal: block, print the delta, allow --force with a reason that lands in the log.
replymarkdown, obviously
replying is one call:
POST /api/repos/nyx/prompt-vault/issues/7/comments
with a comment scoped token.