Policy: dev mode until v1 — main is the workbench, raw bytes off-repo

This repo is a prototype testing a theory, not yet a mirror the public
relies on. The immutability disciplines (never-overwrite, never-rewrite,
raw-first-in-repo) are reframed as the v1.0 target, not day-3 law — a
mirror that force-pushes while preaching immutability would betray its
own founding principle. Until v1: history is malleable and raw source
snapshots live off-repo on the depot (.gitignore'd), with only the
product (records) and provenance (manifests + SHA-256) committed. The
147MB of already-tracked raw zips are dropped from HEAD (git rm --cached,
a forward delete — the bytes stay on the depot).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitignore

@@ -1,2 +1,9 @@
 .DS_Store
 .claude/
+
+# Dev mode (pre-v1): raw source snapshots live off-repo on the depot, not in
+# git history. We commit the product (records) + provenance (manifests +
+# checksums); the raw bytes those hashes anchor stay lean off-box. The
+# "raw-first, in-repo" discipline turns on at v1.0 — see README.
+data/legal/raw/**/*.zip
+data/legal/raw/**/*.xml