AXP Magisk resurrection track: Speckit 009 port AXP/LOS22 to LOS23.

Ship Magisk like GOLDEN; KernelSU optional recycle only; parallel to sunfish-a16-rom standby.

specs/003-lineage-23-vanilla-build/research.md

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+# 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).
+