# Research: 003-lineage-23-vanilla-build

## R1 — Manifest / branch

**Decision**: Use official LineageOS `lineage-23.2` (or the wiki-documented
sunfish 23.2 branch name measured at implement time). Record exact
`repo init` URL/branch and `repo manifest -r` for the known-good build.

**Rationale**: Constitution base = LOS 23.2 / A16; no AXP/GOS base.

## R2 — Build user / path

**Decision**: Build as `android-build` on `rom-dev01`; tree under
`/srv/rom/src/` (exact subdir documented at init); `CCACHE_DIR=/srv/rom/ccache`.

## R3 — Variant

**Decision**: `userdebug` + LOS default/test-keys for this stage (FR-002).
Release keys / AVB = later (`011`).

## R4 — Flash target

**Decision**: **LAB only** (`11231JEC207477`). Owner approved unlock/wipe for
first custom flash. GOLDEN never flashed. Factory zip on disk =
**emergency rescue only** — owner does not want stock as a planned LAB OS;
skip “Yuh on stock” experiment.

## R4b — Banking / root / Phonesky (owner 2026-09-13)

- Hard-gate focus: **Yuh** (+ Swissquote as tracked); Revolut not a hard-gate.
- Root: **KernelSU-Next + SusFS**; ReSukiSU only if KSU-Next fails on LAB.
- Play: **AXP-style patched Phonesky/GPlay** priv-app (not XDA FakeStore-first).

## R5 — Parallelism / OOM

**Decision**: Start conservative `-j` (e.g. half of vCPUs); document failure
recovery (`out/` cleanup) in build notes. Measure host: ~8 vCPU / 62 GiB RAM.

## R6 — What “vanilla” excludes

**Decision**: No microG, Phonesky, signature-spoof patches, KernelSU/SUSFS,
Magisk, call-recording/FLAG_SECURE ports, Graphene/Divest hardening — even if
present on LAB’s current iodé image (that baseline will be wiped by flash).

## R8 — Proprietary blobs

**Decision (owner 2026-09-13):** Factory/Lineage-equivalent blob base, then
selective **AXP sunfish** diffs and **GrapheneOS** diffs (historical sunfish A13
+ transferable bits from a currently supported Pixel). No exotic blob hunting
for GPS; do not overthink for `003` vanilla (factory-equivalent only).