diff --git a/internal/scaffold/fullsend-repo/scripts/post-fix.sh b/internal/scaffold/fullsend-repo/scripts/post-fix.sh
index e055fd30c..afcdfc634 100644
--- a/internal/scaffold/fullsend-repo/scripts/post-fix.sh
+++ b/internal/scaffold/fullsend-repo/scripts/post-fix.sh
@@ -301,8 +301,17 @@ fi
 export GH_TOKEN="${PUSH_TOKEN}"
 
 # Locate process-fix-result.py relative to this script.
+# When this script runs from a content-addressed cache path
+# (sha256/<hash>/content), companion files are not co-located.
+# Fall back to ${FULLSEND_DIR}/scripts if the companion is missing.
+# FULLSEND_DIR is required (fail-closed) to avoid silently resolving to cwd.
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 PROCESS_SCRIPT="${SCRIPT_DIR}/process-fix-result.py"
+if [ ! -f "${PROCESS_SCRIPT}" ] && [ -d "${FULLSEND_DIR:?FULLSEND_DIR must be set}/scripts" ]; then
+  SCRIPT_DIR="${FULLSEND_DIR}/scripts"
+  PROCESS_SCRIPT="${SCRIPT_DIR}/process-fix-result.py"
+  echo "Using fallback companion path: ${SCRIPT_DIR}"
+fi
 
 # Find fix-result.json in the output directory.
 # RUN_DIR is the original cwd (runDir = <outputBase>/<sandboxName>), saved
diff --git a/internal/scaffold/fullsend-repo/scripts/post-prioritize.sh b/internal/scaffold/fullsend-repo/scripts/post-prioritize.sh
index d51140573..0c5ef645a 100755
--- a/internal/scaffold/fullsend-repo/scripts/post-prioritize.sh
+++ b/internal/scaffold/fullsend-repo/scripts/post-prioritize.sh
@@ -13,6 +13,14 @@
 set -euo pipefail
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# When this script runs from a content-addressed cache path
+# (sha256/<hash>/content), companion files are not co-located.
+# Fall back to ${FULLSEND_DIR}/scripts if the companion is missing.
+# FULLSEND_DIR is required (fail-closed) to avoid silently resolving to cwd.
+if [ ! -f "${SCRIPT_DIR}/lib/github-api-csma.sh" ] && [ -d "${FULLSEND_DIR:?FULLSEND_DIR must be set}/scripts/lib" ]; then
+  SCRIPT_DIR="${FULLSEND_DIR}/scripts"
+  echo "Using fallback companion path: ${SCRIPT_DIR}"
+fi
 # shellcheck source=lib/github-api-csma.sh
 source "${SCRIPT_DIR}/lib/github-api-csma.sh"