pre-review hardening: technical qualifiers across all courses, git/Argo CD proper nouns, a11y (skip link, main, focus-visible, reduced-motion net, textContent legends), perf (intrinsic image dims, decoding async, lazy scenes + will-change lifecycle), nginx ^~ /assets/ priority, OG/canonical/build-revision, preflight gates

pilot/manifest-supply.json

@@ -217,7 +217,7 @@
   {
    "name": "mirror",
    "title": "The mirror",
-   "blurb": "zot, a pull-through cache: the fleet asks it, it asks upstream once, everything after is local.",
+   "blurb": "zot, a pull-through cache: on a cache miss it fetches from upstream, then serves subsequent requests locally while the content stays cached.",
    "z": 0,
    "points": [
     [
@@ -433,7 +433,7 @@
   {
    "name": "tag",
    "title": "The tag",
-   "blurb": "A promise - a mutable pointer anyone with push rights can move, and nothing records that it moved.",
+   "blurb": "A mutable reference. Registries may audit tag updates, but the tag itself carries no immutability guarantee.",
    "z": 0,
    "points": [
     [