Individual skill

linux-phone-porting

Use for every hardware bring-up or debug session that ports mainline Linux to a phone or tablet. Retail-unlock targets require an already-unlocked bootloader; locked retail bootloaders are out of scope. Exploit-booted and firmware-booted targets require a demonstrated boot path; the skill never provides unlock or exploit steps.

SKILL.md

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# Linux Phone Porting

A debug iteration costs a build + flash + boot (5-10 min); blind fixes get refuted more often than they land. Follow this order strictly.

**The chain drives itself; the operator owns the decisions.** When a phase's exit condition is met, start the next phase's entry yourself: setup complete → evidence on the first symptom; evidence captured → the phase 2 sweep opens its ledger; ledger full → hypotheses ranked with falsifiers into phase 3's gate; gate passed → the cheapest decisive experiment, then verification, acceptance and cleanup; three refutations → back to phase 2, wider. Do not wait to be told the next step, and do not stop at a phase boundary to summarize — report compactly and continue. Ask, never guess, at the decision points that belong to the operator, and those are the only stops: unresolved target identity or an unspecified interface/session (phase 0 asks), a boot path the operator must complete (locked bootloader, missing payload demonstration — resume when done), the loop's refutation budget, anything that can destroy excluded userdata or otherwise unrecoverable state, physical hands, and pause/resume prerequisites. Everything else advances.

**Every phase entry and command invocation refreshes the session's task list first.** Before any work, replace the running todo/task list with the incoming unit's steps — one item per step of the phase or command about to run, first step marked in progress. A stale list from the previous unit masquerades as pending work and hides real progress; superseding it is part of starting the unit, not bookkeeping to defer.

Scope: mainline Linux bring-up on phones and tablets plus integration of the selected OS userspace — a method, not certification of any OS/device combination. The userspace need not be GNU/Linux; non-Linux kernels are out of scope.

## 0. Set up the port

Once, before the first flash. The stock system is the highest-authority research source for this board, and parts stop being readable once overwritten.