群聊成本控制实战：用 `disableAudioPreflight` 关闭 Telegram 语音预转写

问题/场景：需要 @提及时，群聊语音消息会触发预转写，活跃群里成本偏高。前置条件：使用 Telegram 群组/话题配置并启用 mention gating。实施步骤：1) 在 group/topic 配置开启 `disableAudioPreflight`；2) 保留文本 mention 检测；3) 观察命中率和成本变化；4) 对必要话题按白名单恢复预转写。关键配置：`channels.telegram.groups[].disableAudioPreflight`（或 topic 级同名字段）。验证方法：语音消息不再触发预转写，但文本 @ 触发行为保持。风险与边界：关闭后语音里的提及可能漏检。来源归因：PR #23067。

GITHUBDiscovered 2026-03-07Author yangnim21029

Prerequisites

Telegram group/topic routing is enabled with mention-required policy.
You can modify Telegram channel config and restart safely.

Steps

Identify high-traffic groups where voice-note preflight transcription drives most token usage.
Set `disableAudioPreflight: true` at group/topic level and redeploy gateway.
Run A/B observation for 3-7 days on trigger quality (mentions caught) versus cost reduction.
Re-enable preflight only for critical groups where voice-trigger misses are unacceptable.

Commands

openclaw gateway status

openclaw gateway restart

openclaw help

Verify

Voice-note traffic no longer triggers preflight transcription while text mention routing still works.

Caveats

Disabling preflight can miss voice-only mentions that were previously captured.
Per-topic mention behavior may vary by bot privacy settings（需验证）.

Source attribution

This tip is aggregated from community/public sources and preserved with attribution.

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