diff --git a/docs/reference/observability.md b/docs/reference/observability.md
index 7c30a063..94839e6d 100644
--- a/docs/reference/observability.md
+++ b/docs/reference/observability.md
@@ -81,6 +81,8 @@ OA Event Flow 的高频 trace 统计不得把每个 `trace-stats-updated` 投影
 
 当一个 UniDesk CLI 子流程调用另一个 UniDesk CLI 并使用 `--raw`、`--full` 或机器消费输出时，必须识别全局 stdout guard 返回的 `outputTruncated=true` / `data.dump.path` 包装，并跟随 dump 文件读取真实 JSON payload；不能把 bounded wrapper 当成业务 payload。若内部调用不能安全跟随 dump，应把命令改成更窄的显式 view、id-specific drill-down 或 compact schema，而不是提高全局 dump 阈值。人工 closeout 仍引用有界摘要、hash、run id 和 drill-down 命令，不把 `/tmp/unidesk-cli-output` 当作长期证据源。
 
+branch-follower 的 gate 与 TaskRun drill-down 默认输出必须能直接作为 target-side 性能证据使用，不能稳定触发 stdout dump。CI gate 应返回有界的 PipelineRun 总耗时、慢 TaskRun 对象名、阶段 timeline 和性能摘要；成功 TaskRun drill-down 默认只返回容器状态、日志字节数和 `node-cicd-timing` 摘要，不把成功日志正文塞进 JSON。失败、等待或显式 full/raw drill-down 才展开日志 tail。
+
 全局 stdout guard 不能只返回 dump 元数据。对已知高频长输出命令，bounded wrapper 的 `summary` 必须保留可直接 closeout 的命令特定字段，同时把完整 payload 留在 dump/raw drill-down 中。例如 `debug dispatch ... provider.upgrade` 超阈值时应保留 dispatch task、wait task、plan host root、当前/目标 gateway 版本、scheduler 结果和最终 promoted container 的 `version`、`restartPolicy`、`pidMode`、`heartbeatTimestamp`；`provider triage --full` 超阈值时应保留 `decision`、`scope`、`retryable`、failed/degraded/healthy scopes、signal counts、recommended cross-checks 和问题信号预览。新增会稳定超阈值的诊断命令时，优先补命令特定 compact summary，而不是扩大全局 stdout 阈值。
 
 本地或远端 `AGENTS.md`、`CLAUDE.md`、`SKILL.md` 或同类 agent 入口文档超过 `10 KiB`、超过 YAML dump 阈值，或被 CLI/SSH/trans 读取时触发自动 dump，不能只把 dump 文件路径当成继续工作的正常入口。该现象表示入口文档已经过长，必须按 `docs-spec` 把入口文件拆成短索引：只保留 P0 规则摘要、关键命令入口和指向权威文档的链接；具体流程、背景、判定标准和长篇约束迁入对应职责文件。`SKILL.md` 拆到 `references/` 后禁止再堆成 `references/full.md`、`all.md`、`guide.md` 或其他变相超级 Markdown；必须按职责、生命周期和读取场景拆分成多个可选择的 reference，并在 `SKILL.md` 写清“何时读取哪个文件”。拆分后入口文档、skill 和长期参考必须互相交叉引用，避免同一规则在多个位置重复展开或产生第二真相。
diff --git a/scripts/native/cicd/branch-follower-gate.mjs b/scripts/native/cicd/branch-follower-gate.mjs
index f0ebaee2..7739bbf8 100644
--- a/scripts/native/cicd/branch-follower-gate.mjs
+++ b/scripts/native/cicd/branch-follower-gate.mjs
@@ -87,6 +87,7 @@ async function ciTaskRunEvidence(commit) {
       name: pipelineRef,
       taskCount: Array.isArray(pipeline?.spec?.tasks) ? pipeline.spec.tasks.length : null,
       tasks: Array.isArray(pipeline?.spec?.tasks) ? pipeline.spec.tasks.slice(0, 12).map((task) => ({ name: str(task?.name), runAfter: Array.isArray(task?.runAfter) ? task.runAfter.slice(0, 6) : [] })) : [],
+      tasksTruncated: Array.isArray(pipeline?.spec?.tasks) ? pipeline.spec.tasks.length > 12 : false,
     },
     taskRuns: taskSummary,
   };
@@ -264,22 +265,73 @@ function taskRunsSummary(list) {
       taskName: str(item?.metadata?.labels?.["tekton.dev/pipelineTask"]) || str(item?.spec?.taskRef?.name),
       status: str(condition.status) || "Unknown",
       reason: str(condition.reason),
+      startTime: str(item?.status?.startTime),
+      completionTime: str(item?.status?.completionTime),
       durationSeconds: durationSeconds(item?.status?.startTime, item?.status?.completionTime),
     };
   });
   const failed = rows.filter((item) => item.status === "False");
   const active = rows.filter((item) => item.status !== "True" && item.status !== "False");
-  const slow = rows.filter((item) => typeof item.durationSeconds === "number" && item.durationSeconds >= slowTaskSeconds);
+  const slow = rows
+    .filter((item) => typeof item.durationSeconds === "number" && item.durationSeconds >= slowTaskSeconds)
+    .sort((left, right) => (right.durationSeconds || 0) - (left.durationSeconds || 0));
+  const timeline = rows.slice().sort(compareTaskRunRows);
+  const performance = taskRunPerformance(rows);
   return {
     count: rows.length,
     slowThresholdSeconds: slowTaskSeconds,
     failedCount: failed.length,
     activeCount: active.length,
     slowCount: slow.length,
-    failedItems: failed.slice(0, 5),
-    activeItems: active.slice(0, 5),
-    slowItems: slow.slice(0, 5),
-    items: rows.slice(0, 12),
+    failedItems: failed.slice(0, 6).map(compactNamedTaskRunRow),
+    activeItems: active.slice(0, 6).map(compactNamedTaskRunRow),
+    slowItems: slow.slice(0, 6).map(compactNamedTaskRunRow),
+    timeline: timeline.slice(0, 16).map((item) => compactTimelineTaskRunRow(item, performance.firstStart)),
+    timelineTruncated: timeline.length > 16,
+    performance,
+  };
+}
+
+function taskRunPerformance(rows) {
+  const starts = rows.map((item) => Date.parse(item.startTime || "")).filter((value) => Number.isFinite(value));
+  const finishes = rows.map((item) => Date.parse(item.completionTime || "")).filter((value) => Number.isFinite(value));
+  const durations = rows.map((item) => item.durationSeconds).filter((value) => typeof value === "number");
+  const firstStart = starts.length === 0 ? null : new Date(Math.min(...starts)).toISOString();
+  const lastCompletion = finishes.length === 0 ? null : new Date(Math.max(...finishes)).toISOString();
+  return {
+    firstStart,
+    lastCompletion,
+    spanSeconds: firstStart && lastCompletion ? durationSeconds(firstStart, lastCompletion) : null,
+    taskDurationSumSeconds: durations.length === 0 ? null : Math.round(durations.reduce((sum, value) => sum + value, 0) * 10) / 10,
+    maxTaskDurationSeconds: durations.length === 0 ? null : Math.max(...durations),
+  };
+}
+
+function compareTaskRunRows(left, right) {
+  const leftTime = Date.parse(left.startTime || "");
+  const rightTime = Date.parse(right.startTime || "");
+  if (Number.isFinite(leftTime) && Number.isFinite(rightTime) && leftTime !== rightTime) return leftTime - rightTime;
+  if (Number.isFinite(leftTime)) return -1;
+  if (Number.isFinite(rightTime)) return 1;
+  return String(left.name || "").localeCompare(String(right.name || ""));
+}
+
+function compactNamedTaskRunRow(item) {
+  return {
+    name: item.name,
+    taskName: item.taskName,
+    status: item.status,
+    reason: item.reason,
+    durationSeconds: item.durationSeconds,
+  };
+}
+
+function compactTimelineTaskRunRow(item, firstStart) {
+  return {
+    taskName: item.taskName,
+    status: item.status,
+    startOffsetSeconds: firstStart && item.startTime ? durationSeconds(firstStart, item.startTime) : null,
+    durationSeconds: item.durationSeconds,
   };
 }
 
diff --git a/scripts/native/cicd/taskrun-drilldown.mjs b/scripts/native/cicd/taskrun-drilldown.mjs
index bc3f45a1..2227b857 100644
--- a/scripts/native/cicd/taskrun-drilldown.mjs
+++ b/scripts/native/cicd/taskrun-drilldown.mjs
@@ -60,6 +60,7 @@ async function main() {
   const taskRunSteps = stepRows(status);
   const containers = mergeContainerRows(taskRunSteps, podStatuses).slice(0, maxContainers);
   const logContainers = selectLogContainers(containers);
+  const includeLogTails = process.env.INCLUDE_LOG_TAILS === "true" || condition?.status !== "True";
   const logs = [];
   const perContainerBytes = Math.max(1, Math.floor(maxLogBytes / Math.max(1, logContainers.length)));
   for (const container of logContainers) {
@@ -75,7 +76,7 @@ async function main() {
       container: name,
       lineCount: text.length === 0 ? 0 : text.split(/\r?\n/u).filter((line) => line.length > 0).length,
       bytes: Buffer.byteLength(text, "utf8"),
-      tail: text,
+      ...(includeLogTails || read.ok === false ? { tail: text } : {}),
       nodeCicdTiming: lastNodeCicdTiming(text),
     });
   }