# Runtime Effect Kind-8 Tier2 Setup Core Note

This note records the current setup-payload-core comparison across the six bundled add-building
carrier maps:

- `Alternate USA.gmp`
- `Chicago to New York.gmp`
- `Louisiana.gmp`
- `Pacific Coastal.gmp`
- `Rhodes Unfinished.gmp`
- `Texas Tea.gmp`

The comparison uses the checked `compare-setup-payload-core` surface.

## Immediate result

The upstream setup payload already differs across the carrier set.

Observed differing fields:

- `payload_word_0x14`
- `payload_byte_0x20`
- `payload_word_0x3b2`
- `candidate_header_word_0_hex`
- `candidate_header_word_1_hex`

## Carrier-set shape

Current `payload_word_0x3b2` values:

- `Alternate USA.gmp = 1`
- `Chicago to New York.gmp = 2`
- `Louisiana.gmp = 2`
- `Pacific Coastal.gmp = 1`
- `Rhodes Unfinished.gmp = 1`
- `Texas Tea.gmp = 3`

That means `Louisiana.gmp` is **not** unique on `payload_word_0x3b2`.

Current candidate-header word pairs:

- `Alternate USA.gmp = 0x10000000 / 0x00009000`
- `Chicago to New York.gmp = 0x00000000 / 0x00000000`
- `Louisiana.gmp = 0xcdcdcdcd / 0xcdcdcdcd`
- `Pacific Coastal.gmp = 0x00000000 / 0x00000000`
- `Rhodes Unfinished.gmp = 0x00000000 / 0x00000000`
- `Texas Tea.gmp = 0x00000000 / 0x00000000`

So `Louisiana.gmp` is currently unique among the shipped carrier set on the candidate-header
sentinel pair, while `Alternate USA.gmp` stays separately unique on the recognized
`rt3-105-map-container-v1` header pair.

## Current implication

The upstream side of the Tier 2 strip is now bounded more tightly:

- the current `Louisiana.gmp` recipe/runtime outlier status is not explained by `payload_word_0x3b2`
  alone, because `Chicago to New York.gmp` also carries `2`
- but `Louisiana.gmp` does stand out on the candidate-header sentinel pair

So the next Tier 2 upstream question is narrower:

- whether the unique `0xcdcdcdcd / 0xcdcdcdcd` candidate-header state in `Louisiana.gmp` is
  relevant to the coupled
  `0x00435630 / 0x00412d70 / 0x00412fb0 / 0x00412c10`
  rebuild strip, or whether it is only another container-side artifact unrelated to the shipped
  `Add Building Warehouse05` row.