# Real REST coverage parity acceptance

Executed 2026-09-06 against staged `arcadia-server.exe` SHA256
`BB775876741FE4A7B07CDE08940AEC8E23F545FDAFEC024FC4DC3BA6DD1AB9FC`, with
only Windows system directories on PATH and the staged `libunwind.dll` beside the
binary. A fresh synthetic store and an ephemeral loopback port were used; no user
server/model was touched. The probe started and stopped only its own hidden server.

All **25 HTTP requests passed**. Evidence is retained under
`.local/rest-coverage-20260906-160857`: request payloads, response bodies, status/
ETag metadata, binary provenance, server logs and `result.json`. The prepared runner
is now tracked at `harness/fixtures/rest-coverage/run-coverage-probe.ps1`; the
three-bundle payload is adjacent as `coverage-probe.json`. The tracked copy was
rerun successfully with another fresh store and the same clean PATH: all25 requests
passed again under `.local/rest-coverage-20260906-161345`. See the adjacent README
for reproducible invocation.

| Observable behavior | Observed result |
|---|---|
| Incomplete bundle candidate | HTTP200, valid:true; exact five advisory code/object/field tuples from the plan, all warnings with submitted `work.arcadia` locations. Accepted model/source/ETag unchanged. |
| Warning-only bundle commit | HTTP200, changed:true, revision2. Exact three submitted files retained, including comments and explicit IDs. |
| Current validation, native JSON and canonical Arcadia candidate parity | Same five code/object/field tuples, no structural errors. |
| Invalid Entity endpoint on Interaction | Candidate200/valid:false with `invalid_endpoints`; all five new completeness codes gated. PUT422; accepted model, source bundle and ETag unchanged. |
| Repair | HTTP200, revision3; all five completeness codes clear. The independent existing `sequence_gap` warning remains on Process steps2–3, as expected. |
| Forced server stop and restart, same isolated store | Repaired model/source/validation and opaque ETag identical. |
| Explicit replacement with incomplete bundle | HTTP200, revision4; exact five warnings reappear. This operation is replacement, not server Undo. |

The first attempt correctly rejected the synthetic alias `parent` as reserved.
The fixture now uses `activity_group`, retaining all UUIDs and expected semantics;
the complete probe was rerun from a fresh store. This was fixture repair, not a
production parser change. The failed attempt remains in
`.local/rest-coverage-20260906-160838` for provenance.

This verifies the current Windows service and diagnostics parity, admission and
restart behavior for the representative OA fixture. It does not establish Linux
runtime, container deployment, production-scale throughput or category/source6
features. No probe process is intentionally left running.