# Package interface candidate observation, 2026-10-09

Candidate source: `8951c5f8f22526e9cc1225a4dd47e63a6d420c4a` in compiler PR 1410.
The candidate was built from a clean checkout with Go 1.27.2.
The installed public 0.6.18 binary remains at source `13d576ef`.

`optional-interface.json` and `optional-interface.txt` are the actual new CLI outputs.
`candidate-resolution.json` and `published-resolution.json` compare the same
optional-record fixture with the candidate and installed binary; they are byte-identical.

The dogfood inputs are the compiler's unchanged
`examples/package-caller-construction/mixed.workspace.json`,
`mixed-construction-cases.json`, `inputs.json` and `mixed-evaluation-cases.json`.
The unchanged own model is the workbench's
`models/graph-chooser-20261008/all-data-demonstration/qat_ternary/model.json`,
SHA-256 `3c68205a660695103712e2115ce90accd298b406dced8ad5ad5c9b84bab0a202`.
Raw JSON is compressed without edits. The Go comparator uses `json.Number`
to retain exact integer values.

The comparator confirms unchanged deterministic/model selections and caller
histories relative to the public 0.6.18 observations, four unscored outputs
`15, -50, -45035996273704970, 5`, zero new inference during public/new
receipt replay, and later evaluation 4/4. It compares the original
[published observations](https://raw.githubusercontent.com/wiki/kimjooyoon/meta-ontology-go/observations/release-0618-published-20261009/README.md).
Source, model and candidate binary hashes were identical before and after execution.

`model-time.txt` and `fixed-time.txt` describe one sequential whole-command
observation each, including native tool subprocesses. They are not model-only
latency, host CPU utilization, or a controlled performance comparison.
No new training or model download was performed.

`red.log` records the missing-command failure before implementation.
`package-cli-tests.log`, `race.log` and `projection-race.log` record local
checks. Vet and the full build also exited successfully. Candidate CI is tracked
in [run 37878887257](https://github.com/kimjooyoon/meta-ontology-go/actions/runs/37878887257)
and was pending when this observation was published.