device-connectivity

name	device-connectivity
description	Use when hardware validation or debugging needs the adb-attached Pixel 4 plus a reachable Ultimate device over REST in C64 Commander. Prefer u64 when both u64 and c64u are reachable.
argument-hint	(optional) validation flow or subsystem
user-invocable	true
disable-model-invocation	true

Skill: Device Connectivity

Purpose

Standardize real-device selection for Android and Ultimate hardware validation.

Targets:

• adb-attached Pixel 4 for Android app validation
• u64 or c64u for REST-backed Ultimate validation

If both u64 and c64u are reachable, prefer u64.

Workflow

Step 1 - Confirm Android device availability

Run:

adb devices -l

Prefer the attached Pixel 4 when it is listed and authorized.

Step 2 - Probe Ultimate hardware reachability

Check both hosts explicitly:

curl -sS --max-time 5 http://u64/v1/info
curl -sS --max-time 5 http://c64u/v1/info

Selection rule:

1. If u64 responds successfully, use u64.
2. Otherwise, if c64u responds successfully, use c64u.
3. If neither responds, record the blocker and do not claim hardware validation.

Step 3 - Record the chosen target

When continuing with device-backed validation, log:

• whether the Pixel 4 was present
• which Ultimate host was selected
• why that host was selected

Step 4 - Use the selected target consistently

For the rest of the validation slice:

• install and launch on the Pixel 4
• use the chosen Ultimate hostname consistently in curls, diagnostics, and notes
• avoid mixing u64 and c64u evidence in one validation report without saying so explicitly

Constraints

• Do not assume c64u is the preferred device when u64 is also reachable.
• Do not claim real-device success from adb presence alone.
• Do not claim Ultimate validation from hostname resolution alone; require successful REST response.
• Preserve unrelated worktree changes while gathering hardware evidence.

Completion Criteria

• Pixel 4 adb state checked
• u64 and c64u probed explicitly
• chosen Ultimate target justified by reachability
• hardware evidence names the actual host that was used