# Ordered source graph input observation

Compiler source: `dea641f709b37bfd3f8655a242bebaa6cdc0d18b`, clean build with
Go 1.27.1, public Go SDK v0.2.26-experimental (no local replacement).
`compiler-build.txt` retains embedded VCS/module information (trailing whitespace removed);
`compiler-sha256.txt` identifies the temporary observation executable. The binary
is not redistributed here. Compiler PR #1375 was open during this observation.

`context/` contains all eight source arrangements, 24 complete context exports
(v1/v2/v3), and the feature comparison summary. Exports each report zero model
predictions and zero candidate tests. `graph-feature-order.go` compares all
768 float32 bit patterns, using SHA256 only as a public group identifier. It
retains the supplied accepted-mask labels `7 XOR order` outside the features.

There is one program family, eight arrangements and three feature contracts.
Distinct arrays are 2, 4 and 8. The best deterministic mapping of these exact
arrays to the supplied labels can satisfy at most 2/8, 4/8 and 8/8 rows.
This is an empirical representation bound for these rows, not trained accuracy,
generalization or a bound on a predictor with additional context.

`finite/` is a separate deterministic construction observation performed after
feature extraction. `graph-selection-audit.go` confirms the selected masks agree
with the supplied labels and checks every raw expected/actual field string,
case flag and aggregate count. Each arrangement has five selection cases and
15 expected fields. All matched; attempt counts were 8,7,6,5,4,3,2,1 (36 total).
These repeat the same five inputs across arrangements. Model calls were zero.
These are finite construction observations, not a separate native holdout run.

The source regression suite separately uses synthetic graph-model weights for
FP32/PTQ/QAT dispatch and replay; a zero-weight native test checks 14 named
activity outputs over seven cases, twice on saved replay. No trained graph
weights are present. Existing v1 model quality observations remain separate.

## Reproduce

From a clean checkout of the compiler revision above, using new output paths:

```sh
GOWORK=off GOTOOLCHAIN=go1.27.1 go build -o /path/to/gooo-graph ./cmd/gooo
GOWORK=off GOTOOLCHAIN=go1.27.1 go run /path/to/graph-feature-order.go \
  --compiler /path/to/gooo-graph \
  --source examples/text-operations/source.gooo.fixture --out /path/to/new-context
GOWORK=off GOTOOLCHAIN=go1.27.1 go run /path/to/graph-selection-audit.go \
  --compiler /path/to/gooo-graph --input /path/to/new-context --out /path/to/new-finite
```

Feature arrays, group membership and finite outputs are the comparison targets;
paths and recorded durations can differ. `SHA256SUMS` binds all files in this
directory except itself. No source input was downloaded from private data.