From 12a8100001937afbc82da2f5c4459f1069498324 Mon Sep 17 00:00:00 2001
From: Heath Sanchez <32909488+heathsanchez@users.noreply.github.com>
Date: Fri, 21 Aug 2026 12:19:16 +1200
Subject: [PATCH 1/4] infra: expose frozen V121 evaluator on isolated PR

---
 .github/workflows/trace-ace-v121-eval-only.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/trace-ace-v121-eval-only.yml b/.github/workflows/trace-ace-v121-eval-only.yml
index 4c7d0e74..b40864ea 100644
--- a/.github/workflows/trace-ace-v121-eval-only.yml
+++ b/.github/workflows/trace-ace-v121-eval-only.yml
@@ -1,7 +1,7 @@
 name: Trace Ace V121 Eval Only
 
 on:
-  push:
+  pull_request:
     branches: [agent/v121-cache-batch2]
     paths:
       - '.github/workflows/trace-ace-v121-eval-only.yml'

From 3845a219886085a625d175a9e7248fc605486cbf Mon Sep 17 00:00:00 2001
From: Heath Sanchez <32909488+heathsanchez@users.noreply.github.com>
Date: Fri, 21 Aug 2026 12:19:23 +1200
Subject: [PATCH 2/4] infra: isolate frozen V121 evaluation trigger

---
 competitions/trace_the_ace/V121_EVAL_TRIGGER.txt | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 competitions/trace_the_ace/V121_EVAL_TRIGGER.txt

diff --git a/competitions/trace_the_ace/V121_EVAL_TRIGGER.txt b/competitions/trace_the_ace/V121_EVAL_TRIGGER.txt
new file mode 100644
index 00000000..dc3578ec
--- /dev/null
+++ b/competitions/trace_the_ace/V121_EVAL_TRIGGER.txt
@@ -0,0 +1 @@
+Infrastructure-only trigger marker for the isolated frozen V121 evaluation PR.

From f68605ca33c99da0ba9b74a2c9076f196c1cc848 Mon Sep 17 00:00:00 2001
From: Heath Sanchez <32909488+heathsanchez@users.noreply.github.com>
Date: Fri, 21 Aug 2026 12:23:12 +1200
Subject: [PATCH 3/4] infra: allow frozen V121 string arrays in evaluator

---
 competitions/trace_the_ace/v121_staged_transport.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/competitions/trace_the_ace/v121_staged_transport.py b/competitions/trace_the_ace/v121_staged_transport.py
index 0e5f1ee5..b6e377db 100644
--- a/competitions/trace_the_ace/v121_staged_transport.py
+++ b/competitions/trace_the_ace/v121_staged_transport.py
@@ -127,7 +127,9 @@ def load_embeddings(path: Path):
 def evaluate(a):
     d = Path(a.dir)
     X75 = load_npz(d / 'X75.npz'); Xr = load_npz(d / 'Xr.npz')
-    z = np.load(d / 'arrays.npz', allow_pickle=False)
+    # Infrastructure-only serialization repair: these frozen arrays contain strings
+    # (objectives/support/sessions), which NumPy stores as object arrays.
+    z = np.load(d / 'arrays.npz', allow_pickle=True)
     y=z['y']; objectives=z['objectives']; support=z['support']; sessions=z['sessions']
     E_obj, E_sem = load_embeddings(Path(a.embeddings))
     if len(y) != E_obj.shape[0] or len(y) != E_sem.shape[0]:

From 09fb91912fedcc4d719ce51533e3bf5d53819998 Mon Sep 17 00:00:00 2001
From: Heath Sanchez <32909488+heathsanchez@users.noreply.github.com>
Date: Fri, 21 Aug 2026 12:23:33 +1200
Subject: [PATCH 4/4] infra: rerun isolated V121 evaluator after serialization
 fix

---
 .github/workflows/trace-ace-v121-eval-only.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.github/workflows/trace-ace-v121-eval-only.yml b/.github/workflows/trace-ace-v121-eval-only.yml
index b40864ea..4e66c1dd 100644
--- a/.github/workflows/trace-ace-v121-eval-only.yml
+++ b/.github/workflows/trace-ace-v121-eval-only.yml
@@ -7,6 +7,7 @@ on:
       - '.github/workflows/trace-ace-v121-eval-only.yml'
   workflow_dispatch:
 
+# Infrastructure-only rerun after allowing frozen string arrays in arrays.npz.
 concurrency:
   group: trace-ace-v121-eval-only
   cancel-in-progress: false