Trailhead Promise: Indestructible Backcountry Safety with Temporal & Gemma

说明与用途

Trailhead Promise 是一套离线徒步安全系统，使用 Gemma 提取行程，Zod 验证语法约束的模式，并在 Temporal 中持久化工作流，若徒步者未在截止时间前签到，系统会自动发起紧急升级，且屏幕使用时间不超过30秒。

问题

Backcountry safety apps rely on continuous cellular connectivity, failing when signal is lost and leaving hikers untracked.

结果

Field tests near Hundru Falls demonstrated that the system autonomously escalated when a phone battery drained below 5% and the hiker failed to check‑in, proving the durability of the Temporal workflow and the effectiveness of the grammar‑constrained schema extraction.

工作流

• 1. Hiker speaks itinerary at trailhead
• 2. Gemma model extracts itinerary into a Zod‑validated schema
• 3. Schema is sent to Temporal workflow
• 4. Workflow starts a durable timer for the hike deadline
• 5. Hiker can send check‑in or low‑battery signals via GPS telemetry
• 6. If deadline passes without check‑in, workflow dispatches emergency escalation via SMS and webhook

证据

Existing safety nets like Strava Beacon or Apple Check‑In suffer from an even more dangerous structural flaw: they demand continuous cellular connectivity.

来源

We set out to build Trailhead Promise with a strict design constraint: your total interactive screen time across a five‑hour hike must be under thirty seconds.

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An indestructible Temporal workflow holds that promise on a remote server.

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