rrt/docs/rehost-queue/tier2-rebuild-sequencing-2026-04-21.md

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# Tier2 Rebuild Sequencing (2026-04-21)
This note preserves the currently grounded sequencing around the active Tier-2 queue head, so the
short queue does not have to restate the same late bringup strip every time.
## Preserved Artifact Notes
- `artifacts/exports/rt3-1.06/runtime-effect-kind8-tier2-sequencing-note.md`
- `artifacts/exports/rt3-1.06/runtime-effect-kind8-tier2-recipe-runtime-note.md`
## Coupled Rebuild Strip
The current Tier-2 bringup evidence no longer reads as one isolated helper. The grounded rebuild
owners form one coupled strip:
- `0x00435630`
- rebuilds scenario-side port/warehouse recipe runtime tables
- re-enters `0x00412d70`
- `0x00412d70`
- rebuilds candidate runtime records from scenario state
- does not consult the scenario-side recipe-book name at `[state+0x0fe8]`
- re-enters `0x00435630`
- also re-enters `0x00411ce0` and `0x00411ee0`
- `0x00412fb0`
- broader collection-load owner
- re-enters `0x004120b0`
- then `0x00412d70`
- then `0x00412ab0`
- and only after the later catalog rebuild re-enters `0x00412c10`
- `0x00437737`
- late preseed of named candidate-availability records from the live pool
- upserts through `0x00434f20`
- `0x00434f20`
- writes the boolean named-availability override bit
- immediately re-enters `0x00412c10` when the live candidate pool exists
- `0x00412c10`
- refreshes `[candidate+0x7ac]` from named availability
- then tails into `0x0041eac0`
## Late Bringup Placement
The preserved sequencing note keeps the late `0x197` checkpoint concrete too:
- `0x00444ac1` sits after:
- `0x004354a0`
- territory overlay sweep `0x00487de0`
- and then falls through into:
- `0x00437737`
- followed by the later candidate-side availability refresh `0x00412c10`
So the late Tier-2 strip begins with named-availability preseed and latch refresh, not with the
shell progress or territory overlay helpers that precede it.
## Current Reading
This keeps the active Tier-2 owner question on sequencing and data handoff, not on bare naming:
- one side of the strip is the coupled recipe/runtime rebuild family
`0x00435630 -> 0x00412d70 -> 0x00412fb0`
- the other side is the later named-availability preseed/latch family
`0x00437737 -> 0x00434f20 -> 0x00412c10`
- the remaining non-hook question is how that interaction lets candidate-table rows
`35/43/45..66` reach `0x00412d70` with nonzero `[candidate+0xba/+0xbb]` before the later
`0x00419230` rebank-or-clone pass consumes them
So the next Tier-2 pass should keep tracing the handoff between those two late rebuild bands,
rather than reopening the direct `Warehouse05` availability bit or the already-bounded stock asset
corpus.