diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index e529d58..82794b8 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -9,7 +9,7 @@ name: build
 
 on:
   push:
-    branches: [ main ]
+    branches: [ main, codex/core-rc-20261023 ]
   workflow_dispatch:
     inputs:
       cache_bust:
@@ -42,6 +42,8 @@ jobs:
           git clone --depth 1 --branch main "http://x-access-token:${GITHUB_TOKEN}@gitea.yunhaixingtong.com/${{ github.repository }}.git" /tmp/src
           git -C /tmp/src fetch --depth 1 origin "$GITHUB_SHA"
           git -C /tmp/src checkout --detach FETCH_HEAD
+          test "$(git -C /tmp/src rev-parse HEAD)" = "$GITHUB_SHA"
+          echo "CI_SOURCE_SHA=$GITHUB_SHA"
           cp -a /tmp/src/. .
           rm -rf /tmp/src
           # 取提交备注首行，脱去换行/双引号/反斜杠（避免破坏 webhook JSON），截断到 200 字符
@@ -80,7 +82,19 @@ jobs:
           docker exec "$BUILD_CONTAINER" sh -c "printf '%s' '<settings><profiles><profile><id>nexus-repo</id><repositories><repository><id>nexus-internal</id><url>http://nexus:8081/repository/maven-public/</url><releases><enabled>true</enabled></releases><snapshots><enabled>true</enabled><updatePolicy>always</updatePolicy></snapshots></repository></repositories></profile></profiles><activeProfiles><activeProfile>nexus-repo</activeProfile></activeProfiles></settings>' > /root/.m2/settings.xml"
           # 为真实 MySQL 测试创建本次 job 独占的临时数据库；不映射宿主端口、不连接业务库。
           DB_CONTAINER="${BUILD_CONTAINER}-db"
-          trap 'docker rm -f "$BUILD_CONTAINER" "$DB_CONTAINER" >/dev/null 2>&1 || true' EXIT
+          cleanup_ci() {
+            result=$?
+            trap - EXIT
+            docker rm -fv "$BUILD_CONTAINER" "$DB_CONTAINER" >/dev/null 2>&1 || true
+            docker info >/dev/null 2>&1 || { echo 'CI_CONTAINER_CLEANUP=UNVERIFIED' >&2; exit 1; }
+            if docker inspect "$BUILD_CONTAINER" >/dev/null 2>&1 || docker inspect "$DB_CONTAINER" >/dev/null 2>&1; then
+              echo 'CI_CONTAINER_CLEANUP=FAILED' >&2
+              exit 1
+            fi
+            echo 'CI_CONTAINER_CLEANUP=PASS'
+            exit "$result"
+          }
+          trap cleanup_ci EXIT
           export MYSQL_ROOT_PASSWORD=$(od -An -N32 -tx1 /dev/urandom | tr -d ' \n')
           export MYSQL_PASSWORD=$(od -An -N32 -tx1 /dev/urandom | tr -d ' \n')
           docker create --name "$DB_CONTAINER" --network infra-infra-net \
@@ -96,6 +110,17 @@ jobs:
           [ "$ready" -eq 1 ] || { echo 'Isolated CI MySQL did not become ready' >&2; exit 1; }
           export CI_TEST_DB_URL="jdbc:mysql://${DB_CONTAINER}:3306/flowcenter_ci?useUnicode=true&characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&allowPublicKeyRetrieval=true"
           export CI_TEST_DB_USER=flow_ci CI_TEST_DB_PASSWORD="$MYSQL_PASSWORD"
+          tables=$(docker exec "$DB_CONTAINER" sh -c 'MYSQL_PWD="$MYSQL_PASSWORD" mysql -h127.0.0.1 -u"$MYSQL_USER" "$MYSQL_DATABASE" -Nse "SELECT COUNT(*) FROM information_schema.tables WHERE table_schema=DATABASE()"')
+          [ "$tables" = 14 ] || { echo "Expected 14 CI schema tables, got $tables" >&2; exit 1; }
+          echo "CI_SCHEMA_TABLES=$tables"
+          # 先在独立空 schema 验证真实 validate 失败会阻断打包；随后再生成正向候选 JAR。
+          printf '%s\n' 'CREATE DATABASE flowcenter_ci_invalid;' "GRANT ALL ON flowcenter_ci_invalid.* TO 'flow_ci'@'%';" | \
+            docker exec -i "$DB_CONTAINER" sh -c 'MYSQL_PWD="$MYSQL_ROOT_PASSWORD" mysql -uroot'
+          positive_db_url="$CI_TEST_DB_URL"
+          export CI_TEST_DB_URL="jdbc:mysql://${DB_CONTAINER}:3306/flowcenter_ci_invalid?useUnicode=true&characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&allowPublicKeyRetrieval=true"
+          docker exec -e CI_TEST_DB_URL -e CI_TEST_DB_USER -e CI_TEST_DB_PASSWORD \
+            "$BUILD_CONTAINER" sh -c 'cd /build && sh ci/verify-failure-guard.sh'
+          export CI_TEST_DB_URL="$positive_db_url"
           docker exec -e CI_TEST_DB_URL -e CI_TEST_DB_USER -e CI_TEST_DB_PASSWORD \
             "$BUILD_CONTAINER" sh -c 'cd /build && sh ci/test-gate.sh clean package'
           docker exec "$BUILD_CONTAINER" sh -c 'cd /build/target && cp *.jar app.jar'
@@ -104,7 +129,7 @@ jobs:
           docker rm -f "$BUILD_CONTAINER"
 
       - name: 构建并推送镜像
-        if: ${{ inputs.tests_only != 'true' }}
+        if: ${{ success() && github.ref == 'refs/heads/main' && inputs.tests_only != 'true' }}
         run: |
           set -e
           TAG=$(echo "$GITHUB_SHA" | cut -c1-8)
@@ -115,7 +140,7 @@ jobs:
 
       # 通知 projman：webhook 收到后只建档 Release(status=pending)，部署由运维在 DeployTab 手动触发（App.deployMode=manual）
       - name: 通知 projman 建档（部署由运维手动触发）
-        if: ${{ inputs.tests_only != 'true' }}
+        if: ${{ success() && github.ref == 'refs/heads/main' && inputs.tests_only != 'true' }}
         run: |
           curl -sS -X POST "http://192.168.10.160:8090/projman/api/deploy/webhook" \
             -H "Content-Type: application/json" \
diff --git a/ci/README.md b/ci/README.md
index a98425c..dcd0d17 100644
--- a/ci/README.md
+++ b/ci/README.md
@@ -27,3 +27,13 @@ CI 场景必须实际连接 `flowcenter_ci*`，不能悄悄改用默认开发库
 不能将等价 Maven 证据描述为实际 Gitea workflow 已通过。
 
 实体结构变更时应显式刷新 SQL 快照并重新验证；不能把 validate 改为 update 来绕过缺表或缺列。
+
+
+## 核心 RC 功能分支实跑
+
+`codex/core-rc-20261023` 的 push 只执行测试/JAR；镜像推送与通知同时受 main ref 与 tests_only 条件约束。
+检出后核验 `CI_SOURCE_SHA` 等于事件 SHA，不能使用随后更新的 main。
+FL 在同一独立 MySQL 容器额外创建空 `flowcenter_ci_invalid`，先运行 `verify-failure-guard.sh`：
+要求 11 项真实数据库测试因 validate 缺表报错、Maven 非零且无 JAR；随后对 14 表正常 schema 执行正向门禁。
+空库检查的预期失败不属于 380 项正向用例。回收检查打印 `CI_CONTAINER_CLEANUP=PASS`，同时删除本次容器的匿名卷。
+本文件是运行约定；只有取得对应远端准确 SHA 的实际日志，才能宣称 runner 已完成验证。
diff --git a/ci/verify-failure-guard.sh b/ci/verify-failure-guard.sh
new file mode 100644
index 0000000..cadef0c
--- /dev/null
+++ b/ci/verify-failure-guard.sh
@@ -0,0 +1,18 @@
+#!/bin/sh
+set -eu
+cd "$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)"
+: "${CI_TEST_DB_URL:?isolated empty MySQL schema URL is required}"
+case "$CI_TEST_DB_URL" in */flowcenter_ci_invalid\?*|*/flowcenter_ci_invalid_*\?*) ;; *) echo 'Negative guard requires its own invalid test schema' >&2; exit 2 ;; esac
+log=$(mktemp /tmp/flow-ci-negative.XXXXXX)
+trap 'rm -f "$log"' EXIT
+set +e
+sh ci/test-gate.sh clean package >"$log" 2>&1
+code=$?
+set -e
+cat "$log"
+echo "NEGATIVE_MVN_EXIT=$code"
+[ "$code" -ne 0 ] || { echo 'Empty schema unexpectedly passed' >&2; exit 1; }
+grep -q 'Schema-validation: missing table' "$log"
+grep -q 'Tests run: 92, Failures: 0, Errors: 11, Skipped: 0' "$log"
+[ -z "$(find target -maxdepth 1 -name '*.jar' -print -quit 2>/dev/null)" ] || { echo 'Failed gate produced a JAR' >&2; exit 1; }
+echo 'CI_EMPTY_SCHEMA_FAILURE_GUARD=PASS'