Weekly hardening: coverage (v153 Iterator Join) + v147 MDN-shape upgrades

migrations.json

@@ -528,5 +528,15 @@
     "reason": "Listing correction per CLAUDE.md invariants #1 (slug source: milestone listing name) and #2 (milestone gating: listing position only): chromestatus feature 6035800057839616 is ABSENT from the live milestone=149 listing and PRESENT in the milestone=149 listing ('In developer trial (Behind a flag)'; listing name 'Platform-provided behaviors for custom elements'). The feature was also renamed on chromestatus, so the slug follows the current listing name. Same chromestatus feature id; recording as a move so the old route 301-redirects to the corrected route and old inbound links resolve instead of 404. Note: same-milestone listing rename.",
     "evidence": "Live chromestatus listings queried 2026-07-28: feature 6035800057839616 present in features_by_type for milestone=149 ('In developer trial (Behind a flag)'), absent from milestone=149. Page identity link (invariant #3) unchanged: chromestatus.com/feature/6035800057839616.",
     "date": "2026-07-28"
+  },
+  {
+    "id": "v152/sub-apps",
+    "action": "move",
+    "from": "/v152/sub-apps/",
+    "to": "/v152/sub-apps-for-iwas/",
+    "feature": "6260680824061952",
+    "reason": "Listing correction per CLAUDE.md invariant #1 (slug source: milestone listing name): the live milestone=152 listing now names chromestatus feature 6260680824061952 'Sub apps for IWAs' (slug sub-apps-for-iwas); the previous page was slugged from the earlier listing name 'Sub apps' (itself moved from v150 on 2026-07-28). Same chromestatus feature id; recording as a move so the old route 301-redirects to the corrected route and old inbound links resolve instead of 404. One canonical page per identity — the destination carries the upgraded MDN-shaped reference; publishing both routes as built pages would let server.ts's first-wins identity index pick either and the two references drift (flagged by Codex review on PR #7).",
+    "evidence": "Live milestone=152 listing queried 2026-08-30: features_by_type lists id 6260680824061952 under 'Enabled by default' with name 'Sub apps for IWAs'. Page identity link (invariant #3) unchanged on the destination: chromestatus.com/feature/6260680824061952. Old folder v152/sub-apps/ removed in this commit; server.ts serves the 301 from this record.",
+    "date": "2026-08-30"
   }
 ]