docs(openspec): archive gateway completion changes

2026-08-10 08:58:46 +07:00
parent 68608a76a2
commit 6264e9c2dc
17 changed files with 96 additions and 36 deletions
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+## Context
+
+`FragmentPayload` currently stops at 16 × 1,179 bytes and the independent test client assumes ordered fragments. Native Apollo output enters count-only buffered channels, so realistic complete frames have neither a byte ceiling nor an explicit residence bound.
+
+## Goals / Non-Goals
+
+**Goals:**
+
+- Implement Protocol datagram-v2 for complete encoded frames up to 1 MiB.
+- Reassemble bounded duplicate/reordered QUIC datagrams independently.
+- Bound native video queue count, bytes, and residence time while retaining latest-frame replacement and drop telemetry.
+
+**Non-Goals:**
+
+- Codec inspection, retransmission, provider fallback, generic queue/transport APIs, or Server behavior changes.
+
+## Decisions
+
+- Keep the existing `Frame`/QUIC path and add version-aware encode/decode rather than a second transport.
+- Use one sequence per provider frame and the Protocol 1,177-byte fragment size.
+- Keep the existing native video channel at 16 entries, add exact atomic byte
+  accounting capped at 4 MiB, and use per-entry timers for the 250 ms residence
+  bound. This matches the Protocol's reviewed incomplete-unit timeout and covers
+  bounded keyframe serialization; the transport performs a final stale check.
+- Audio and events keep their independent existing limits.
+
+## Risks / Trade-offs
+
+- [Latest-frame eviction drops decodable dependencies] → preserve truthful drops and existing IDR feedback; never grow memory or block every session.
+- [Large frames multiply fragment sends] → cap both complete bytes and fragment count before allocation.
+- [Expiry races with dequeue or cleanup] → stop each package-private timer on
+  dequeue/replacement, serialize channel expiry and close, and retain the
+  transport stale check.