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VerseVDI-Data-Plane/openspec/changes/archive/2026-07-29-phase3c-gateway-qualification/proposal.md
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Why

The Phase 3C gateway candidate has deterministic transport and scheduler tests but no executable artifact generator for the normative ten-minute media measurements and six bounded impairment profiles. Without that evidence, P3C-029 through P3C-033 cannot be frozen truthfully.

What Changes

  • Add one stdlib-only qualification command for the three fixed encoded-media profiles and the exact six Section 7.2 impairment profiles.
  • Emit bounded machine-readable configuration, raw observations, summaries, environment, topology, direction, queue discipline, and tool version.
  • Fail the command when payload integrity, the 5 ms processing p95, impairment bounds, fairness, capacity-step convergence, or aggregate cap gates fail.
  • Keep live Apollo, macOS, physical firewall, real encoder fidelity, and real multi-host scale explicitly deferred-owner-e2e.

Capabilities

New Capabilities

  • gateway-qualification: Deterministic P3C-029 through P3C-033 media, processing, fairness, cap, and impairment evidence generation.

Modified Capabilities

None.

Impact

The Data Plane gains a qualification-only Go command, focused tests, and documented evidence output. It adds no dependency, production transport abstraction, provider route, codec operation, cgo, sidecar, or Connection Server code.