diff --git a/docs/agents/publish.md b/docs/agents/publish.md
index f29467b..cd0d98d 100644
--- a/docs/agents/publish.md
+++ b/docs/agents/publish.md
@@ -47,7 +47,7 @@ workflow 的 `channel` 输入**只决定 npm dist-tag**（如 `mcp` / `plugin` /
 1. 在 GitHub 触发 Publish workflow，mode 选 `channel`，channel 填 npm dist-tag 名：
    - **`bailian-cli`**：npm 发到该 tag；二进制同时刷新 CDN `sync-release.json`（与 tag 名无关）。本机验证：`BAILIAN_CHANNEL=sync-release`
    - **`knowledge-studio-cli`**：仅 npm（自动跳过 binary，不碰 `sync-release.json`）
-2. CI 自动：生成 `0.0.0-beta-<sha7>-<date>` → 临时 bump → 自检 → **npm 发到 dist-tag** →（bailian-cli）**Bun 编二进制 + GH prerelease + 覆盖 `sync-release.json`** → 还原 package.json
+2. CI 自动：生成 `0.0.0-beta-<sha7>-<YYYYMMDDHHMM>`（UTC 到分钟；同 commit 同分钟重跑会覆盖同号）→ 临时 bump → 自检 → **npm 发到 dist-tag** →（bailian-cli）**Bun 编二进制 + GH prerelease + 覆盖 `sync-release.json`** → 还原 package.json
 3. 对应脚本：`tools/release/publish-channel.mjs`
 
 ### stable 发布
diff --git a/tools/release/lib/git.mjs b/tools/release/lib/git.mjs
index eb4263c..89d39a8 100644
--- a/tools/release/lib/git.mjs
+++ b/tools/release/lib/git.mjs
@@ -34,7 +34,7 @@ export function pushTag(tag, remote = "origin") {
   run("git", ["push", remote, tag]);
 }
 
+/** UTC stamp for channel beta versions: `YYYYMMDDHHMM` (minute resolution). */
 export function utcDateStamp() {
-  const iso = runCapture("date", ["-u", "+%Y%m%d"]);
-  return iso;
+  return runCapture("date", ["-u", "+%Y%m%d%H%M"]);
 }
diff --git a/tools/release/publish-channel.mjs b/tools/release/publish-channel.mjs
index 3bc0bdb..6f2963f 100644
--- a/tools/release/publish-channel.mjs
+++ b/tools/release/publish-channel.mjs
@@ -60,8 +60,8 @@ function restoreOriginals() {
 try {
   step("compute channel version");
   const sha = headSha7();
-  const date = utcDateStamp();
-  const betaVersion = `0.0.0-beta-${sha}-${date}`;
+  const stamp = utcDateStamp(); // YYYYMMDDHHMM (UTC)
+  const betaVersion = `0.0.0-beta-${sha}-${stamp}`;
   log(`channel=${channel}  version=${betaVersion}`);
 
   step("temporarily bump package.json (not committed)");