diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index a49e71b6..354c19d0 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -564,9 +564,21 @@ jobs:
           echo "$results" | python3 -c '
           import json, sys
           ns = json.load(sys.stdin)
-          # Exclude null (Phase 3 suppressed / in-flight) from the bad list.
+          # TEMPORARY (interim per #664, 2026-05-12, Release-Manager-approved): demote
+          # `platform-build` back to Phase-3 treatment in this check. It has a pre-existing
+          # `internal/handlers` test regression (sqlmock/symlink/MCP fixes are on `staging`
+          # at af95561f / #634, not yet ported to `main` because main↔staging diverged on
+          # internal/handlers/ ~1841 ins/745 del — a clean cherry-pick conflicts; needs a
+          # fresh re-apply against main). Gitea ignores job-level `continue-on-error: true`
+          # (quirk #10), so `platform-build`'s result is `failure` not `null` — hence it
+          # would otherwise hard-fail this sentinel. Exempting it here stops the cascade to
+          # `CI / all-required` WITHOUT hiding the failure: `CI / Platform (Go)` stays red
+          # and #664 stays open as the fix tracker. **DELETE PHASE4_EXEMPT (and this block)
+          # when #634’s fix lands on main / #664 closes — that re-enforces RFC #219 Phase 4.**
+          PHASE4_EXEMPT = {"platform-build"}
+          # Exclude null (Phase 3 suppressed / in-flight) and PHASE4_EXEMPT from the bad list.
           bad = [(k, v.get("result")) for k, v in ns.items()
-                 if v.get("result") not in ("success", None)]
+                 if v.get("result") not in ("success", None) and k not in PHASE4_EXEMPT]
           if bad:
               print(f"FAIL: jobs not green:", file=sys.stderr)
               for k, r in bad: