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Echo

作者 SymbolStar · GitHub ↗ · v0.2.0 · MIT-0
cross-platform ⚠ suspicious
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在 OpenClaw 中安装
/install echo-cue
功能描述
Patch a locally installed OpenClaw Control UI so that finishing an assistant reply plays a short Web-Audio two-tone "ding-dong" chime in the browser tab. Loc...
使用说明 (SKILL.md)

echo-cue 🔔 (a.k.a. "echo")

A zero-build local patch for OpenClaw Control UI (webchat) that plays a short two-tone chime (A5 → E5, ~900ms) when an assistant reply finishes streaming. Designed as a stop-gap until upstream PR openclaw/openclaw#73894 (issue #69186) lands.

Why this exists

OpenClaw Control UI has no completion sound on main yet. PR #73894 implements it but has been OPEN without review since 2026-04-29. This skill injects an equivalent IIFE into the bundled UI dist so it works today, and gracefully steps aside when upstream ships.

What you get

  • Short ding-dong when the assistant finishes a reply
  • Skipped for NO_REPLY / empty silent completions
  • Always rings by default (foreground + background); set onlyHidden=on to limit to hidden tabs only
  • 4-second hard rate-limit + content-fingerprint dedup → never double-rings on streaming re-renders
  • Per-browser localStorage toggles (no UI surface added)
  • One-shot apply / remove with backup
  • Cache-bust: rewrites index.html to a new bundle filename so plain Cmd+R picks up the patch
  • Patches every detected OpenClaw install (brew + nvm + OPENCLAW_HOME) so it works even when Gateway runs under a different node than which openclaw resolves
  • Auto-detects upstream PR landing → skips itself

Install

bash apply.sh

Then refresh your Control UI browser tab (regular Cmd+R is enough, the script cache-busts the bundle filename). Click or press a key once on the page to unlock the AudioContext (this happens automatically the first time you send a message).

Verify

DevTools console:

window.__milly_cue_v1__   // → true

Send a question, switch to another tab — you should hear a ding-dong when the assistant finishes.

Toggle (per browser)

// Disable entirely
localStorage.setItem('milly.completionCue', 'off')

// Re-enable
localStorage.removeItem('milly.completionCue')

// Ring even when the tab is in foreground (default behaviour as of 0.2.0):
localStorage.removeItem('milly.completionCue.onlyHidden')

// Limit ringing to hidden / unfocused tabs only:
localStorage.setItem('milly.completionCue.onlyHidden', 'on')

Uninstall

bash remove.sh

Restores the original bundle from index-*.js.milly.bak and the original index.html from index.html.milly.bak.

After openclaw update

The update overwrites dist/control-ui/..., dropping the patch. Re-run:

bash apply.sh

apply.sh is idempotent and detects upstream:

  • Already patched → skip
  • Upstream responseCompletionSound shipped → skip + advise uninstall

Known limits

  • Anchor: .chat-group.assistant DOM class. If OpenClaw renames it the patch silently does nothing (fail-quiet, no breakage).
  • AudioContext requires one user gesture per page load (browser policy).
  • Webchat only. TUI / iOS / macOS / Android clients are not covered (they have their own native notification stacks).
  • Single audible cue per assistant turn regardless of message length.

File layout

File Purpose
apply.sh Detect every OpenClaw install, idempotent inject IIFE, backup, cache-bust
remove.sh Restore from .milly.bak files
inject/completion-cue.iife.js The patch payload
tests/manual.md 7-step verify checklist

Related

安全使用建议
Before installing, understand that this is a local patch: it rewrites OpenClaw Control UI bundle files and index.html in detected installs so the browser can play a chime. The artifacts include backups and an uninstall script, and no exfiltration or credential handling is evident.
功能分析
Type: OpenClaw Skill Name: echo-cue Version: 0.2.0 The skill performs automated patching of the OpenClaw Control UI by searching for installations across the system (including global npm and nvm directories) and injecting a JavaScript payload into minified production bundles. While the payload in 'inject/completion-cue.iife.js' appears limited to playing audio cues via the Web Audio API and lacks data exfiltration or network capabilities, the mechanism used in 'apply.sh' to modify application files and 'index.html' in-place is a high-risk behavior. This pattern of modifying production assets across the filesystem is a risky capability that could be repurposed for unauthorized code execution or persistence.
能力评估
✓ Purpose & Capability
The browser payload matches the stated purpose: it watches assistant-message DOM updates and plays a Web Audio chime, with no network calls, credential use, or unrelated data handling shown.
ℹ Instruction Scope
The instructions are user-directed, but the default apply script intentionally patches every detected OpenClaw install rather than only one active install.
ℹ Install Mechanism
There is no install spec, but SKILL.md asks the user to run a shell script manually; this is disclosed and central to the local-patch purpose.
ℹ Credentials
The script searches common global, nvm, pnpm, and OPENCLAW_HOME locations and rewrites OpenClaw UI dist files. That is proportionate to a local UI patch, but users should understand the breadth.
ℹ Persistence & Privilege
The patch persists in the installed UI bundle and index.html until removed, but the artifacts disclose backups and include a remove.sh restore path.
如何使用
  1. 确保已安装 OpenClaw（本地或 Docker 部署）
  2. 在对话框中输入安装命令：/install echo-cue
  3. 安装完成后，直接呼叫该 Skill 的名称或使用 /echo-cue 触发
  4. 根据 Skill 的参数说明提供必要输入，即可获得结构化输出
版本历史
v0.2.0
Default behavior change: ring in foreground tabs too (set milly.completionCue.onlyHidden=on to restrict to hidden tabs only).
v0.1.1
Align SKILL name field with published slug (echo-cue).
v0.1.0
Initial release: two-tone Web Audio chime when an assistant reply finishes streaming. Stop-gap for openclaw/openclaw#69186 / PR #73894.
元数据
Slug echo-cue
版本 0.2.0
许可证 MIT-0
累计安装 0
当前安装数 0
历史版本数 3
常见问题

Echo 是什么？

Patch a locally installed OpenClaw Control UI so that finishing an assistant reply plays a short Web-Audio two-tone "ding-dong" chime in the browser tab. Loc... 它是一个面向 Claude Code / OpenClaw 的 AI Agent Skill 插件，目前累计下载 92 次。

如何安装 Echo？

在 OpenClaw 或 Claude Code 对话框中运行命令「/install echo-cue」即可一键安装，无需额外配置。

Echo 是免费的吗？

是的，Echo 完全免费，采用 MIT-0 许可证，可自由下载、安装和使用。

Echo 支持哪些平台？

Echo 跨平台运行，可在任意部署了 OpenClaw / Claude Code 的环境中使用（cross-platform）。

谁开发了 Echo？

由 SymbolStar（@symbolstar）开发并维护，当前版本 v0.2.0。

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