# Rehost Queue

This file is the short active queue for the current runtime and reverse-engineering frontier.

## Working Rule

- Continue after each commit unless the queue is empty, a real blocker remains, or approval is needed.
- Keep detailed branch notes, long evidence dumps, and retired queue state in `docs/rehost-queue/`.
- Prefer linking to preserved notes instead of growing this file into another worklog.

## Current Active Items

- The active static parser head is now the `engine_types` semantics frontier.
  The repo now has structural inspectors for `.car`, `.lco`, `.cgo`, and `.cct`, but the binary side is still only partially semantic: the checked 1.05 corpus grounds `.car` fixed strings at `0x0c / 0x48 / 0x84` plus a second fixed stem slot at `0xa2` and a side-view resource name at `0xc0`, while `.lco` carries a stable primary stem at `0x04` and only conditional companion/body slots at `0x0c` and `0x12` when the leading stem slot is padded.
  The next honest static work is to keep promoting those fixed lanes into stable parser fields and decide how far `.cgo` and the remaining `EngineTypes` sidecars can be grounded without overclaiming semantics.
  Preserved checked parser detail now lives in [EngineTypes parser semantics](rehost-queue/engine-types-parser-semantics-2026-04-21.md).
  Preserved checked format inventory detail now lives in [RT3 format inventory](rehost-queue/format-inventory-2026-04-21.md).

## Preserved External And Dynamic Blockers

- The locomotives-page tail remains preserved as an external-corpus blocker.
  Static repo-local work on this head is now exhausted: the local `29`-save `.gms + .gmx` census proves the stable prefix through `58`, proves the same two scenario-dependent `59+` tail families, and still finds no `Class QJ` placement plus no descriptor carriers in `452` or `457..502`. The next honest non-hook step requires a broader save corpus; the next non-static step requires dynamic tracing.
  Preserved checked blocker detail now lives in [Locomotive descriptor tails](rehost-queue/locomotive-descriptor-tails-2026-04-21.md).
- The periodic-company control-lane head remains preserved as a dynamic blocker around the ordinary loaded runtime-effect strip `0x00444d92 -> 0x00432f40(kind 8) -> 0x004323a0 -> 0x00431b20`.
  Static progress on this head now appears genuinely blocked: the whole-binary `[...+0x7ef]` reference census still collapses to the grounded writer set plus the already-known compare and copy helpers, so the next honest step likely requires hook-side or runtime tracing between reload `0x00433130` and the world-entry kind-`8` sweep at `0x00444d92`.
  Preserved checked control-lane detail now lives in [Periodic company control lane](rehost-queue/periodic-company-control-lane-2026-04-21.md).
- The Tier-2 building head remains preserved as a dynamic blocker around the seed/projection seam into `0x00412d70`.
  The stock decode chain, the bare-name remap callback, the rebank-or-clone owner, and the earlier suspected mid-range replay strip are all now grounded, so the next honest step likely requires runtime tracing of which source rows actually enter the live bank-qualified seed set.
  Preserved checked row-family detail now lives in [Tier2 candidate row families](rehost-queue/tier2-candidate-row-families-2026-04-21.md).
  Preserved checked stock selector-byte detail now lives in [Tier2 selector-byte sources](rehost-queue/tier2-selector-byte-sources-2026-04-21.md).
  Preserved checked rebuild sequencing detail now lives in [Tier2 rebuild sequencing](rehost-queue/tier2-rebuild-sequencing-2026-04-21.md).

## Preserved Detail

- [Archive snapshot](rehost-queue/archive-2026-04-19.md)
- [EngineTypes parser semantics](rehost-queue/engine-types-parser-semantics-2026-04-21.md)
- [RT3 format inventory](rehost-queue/format-inventory-2026-04-21.md)
- [Locomotive descriptor tails](rehost-queue/locomotive-descriptor-tails-2026-04-21.md)
- [Periodic company control lane](rehost-queue/periodic-company-control-lane-2026-04-21.md)
- [Tier2 candidate row families](rehost-queue/tier2-candidate-row-families-2026-04-21.md)
- [Tier2 rebuild sequencing](rehost-queue/tier2-rebuild-sequencing-2026-04-21.md)
- [Tier2 selector-byte sources](rehost-queue/tier2-selector-byte-sources-2026-04-21.md)
- [Progress history](history/progress-history.md)