diff --git a/.agents/skills/unidesk-webdev/references/web-probe.md b/.agents/skills/unidesk-webdev/references/web-probe.md
index 73d354a8..ebd98210 100644
--- a/.agents/skills/unidesk-webdev/references/web-probe.md
+++ b/.agents/skills/unidesk-webdev/references/web-probe.md
@@ -12,6 +12,10 @@
   - 默认 profile 由同一 YAML 的 `defaultConsoleVerificationProfile` 选择，CLI `--profile` 只做显式 profile 选择；
   - 该命令用于已部署页面人工 closeout，不作为 CI/CD gate，不替代 Workbench Kafka、Trace 和性能专项 validator；
   - 成功或失败均以有界 `issueEvidence`、report SHA、screenshot SHA 和失败摘要收口，不再重复创建 `.state/probes/*.mjs`。
+- WebProbe 远程命令错误可见性：
+  - 默认文本输出必须在独立 `COMMAND_OUTPUT` 段完整展示已经脱敏并限长的 `stderrTail` 与 `stdoutTail`；
+  - 摘要表可以继续提供单行预览，但不得用表格宽度裁剪替代完整的有界错误证据；
+  - `exitCode` 非零且命令输出为空时按可观测性故障处理，先修复探针输出合同，再判断浏览器或业务根因。
 - Workbench 与 Performance 调查规则：
   - 先使用专用 collect/analyze view；
   - 不要先检索原始 JSONL artifact。
diff --git a/scripts/src/hwlab-node/web-observe-render.test.ts b/scripts/src/hwlab-node/web-observe-render.test.ts
index 221ed00e..c801d5cd 100644
--- a/scripts/src/hwlab-node/web-observe-render.test.ts
+++ b/scripts/src/hwlab-node/web-observe-render.test.ts
@@ -476,6 +476,7 @@ test("web-probe script renders bounded command tails when report output is missi
   const text = String(rendered.renderedText ?? "");
   assert.match(text, /stderrTail\s+Error: browser launch failed at runner\.mjs:1:1/u);
   assert.match(text, /stdoutTail\s+partial output/u);
+  assert.match(text, /COMMAND_OUTPUT\nstderrTail: Error: browser launch failed at runner\.mjs:1:1\nstdoutTail: partial output/u);
 });
 
 test("web-probe command governance distinguishes ad-hoc scripts from repo-owned generated commands", () => {
diff --git a/scripts/src/hwlab-node/web-observe-render.ts b/scripts/src/hwlab-node/web-observe-render.ts
index 44d32df9..1d916b01 100644
--- a/scripts/src/hwlab-node/web-observe-render.ts
+++ b/scripts/src/hwlab-node/web-observe-render.ts
@@ -1721,6 +1721,14 @@ export function renderWebProbeScriptResult(result: Record<string, unknown>): Rec
   if (typeof commandResult.stdoutTail === "string" && commandResult.stdoutTail.trim()) {
     summaryRows.push(["stdoutTail", webProbeScriptPreview(commandResult.stdoutTail)]);
   }
+  const commandOutputLines = [
+    typeof commandResult.stderrTail === "string" && commandResult.stderrTail.trim()
+      ? `stderrTail: ${webProbeScriptPreview(commandResult.stderrTail)}`
+      : null,
+    typeof commandResult.stdoutTail === "string" && commandResult.stdoutTail.trim()
+      ? `stdoutTail: ${webProbeScriptPreview(commandResult.stdoutTail)}`
+      : null,
+  ].filter((line): line is string => line !== null);
   const renderedText = [
     `UNIDESK_WEB_PROBE_COMMAND_PROMOTION_HINT ${JSON.stringify(commandPromotionHint)}`,
     "",
@@ -1731,6 +1739,10 @@ export function renderWebProbeScriptResult(result: Record<string, unknown>): Rec
     "",
     webObserveTable(["FIELD", "VALUE"], summaryRows),
     "",
+    commandOutputLines.length === 0
+      ? "COMMAND_OUTPUT\n-"
+      : ["COMMAND_OUTPUT", ...commandOutputLines].join("\n"),
+    "",
     resultRows.length === 0
       ? "SCRIPT_RESULT\n-"
       : webObserveTable(["KEY", "VALUE"], resultRows),