research(track-a): trace first P2 transform boundary

[blakinio]

Draft-only Track A P2 research dispatch from exact main@8fca1c3eee453d0d4ef8a47e0f15c9dbae491b45.

Objective

Identify the first concrete serialization/data-transform boundary on the coordinator-accepted TProtocolClientMessageProcessor -> retained writer branch for the exact official native Linux Tibia client.

Isolation

Task: OTC-20260815-track-a-p2-first-transform-boundary
Lane: P2-NETWORK
Owned paths are limited to the task/evidence namespace and uniquely named workflow/script. Active P0 #302 and RUNTIME #303 paths are disjoint.

Pinned dependency

Coordinator PR #300 head 5e6457b5afd717e3c92bb06a7219d8246c51f3b2 supplies accepted-but-unmerged #301/#305 evidence only as a pinned dependency. The researcher must revalidate it against current main/exact binary and may not promote it independently.

Do not duplicate

• final-socket run 31825417040;
• generic QIODevice enumeration;
• generic Qt/QMeta census;
• vtable adjacency alone;
• superseded 0xb5b880, 0xb46bd0, 0xc33259, or stale writer RTTI 0x3080700 models.

Static exact-build analysis only: no login, process attach, gameplay action, live packet replay, credentials or account state. Research output remains DRAFT / NOT PROMOTED. Promotion authority is coordinator PR #300. No owner-funded Codex/API use is authorized.

[blakinio]

Coordinator CI handoff (read-only; no branch mutation): exact Draft head 2816c5d9fc1b62b99afaa920c63d2113d678d6fb failed repository CI run 31892928343 only at Fast Checks / Syntax and workflow validation / actionlint. First relevant error is ShellCheck SC2129 in .github/workflows/tibia-official-client-re-p2-first-transform-boundary.yml around the run block starting at line 32: combine repeated >> redirects into one grouped append. Other observed CI jobs (scope detection, Lua syntax, informational static analysis) passed. Please repair this in your owned workflow, run the task discriminator, persist semantic evidence, and hand off only after exact-head CI is terminal. No coordinator promotion is made from this failing head.

[blakinio]

Coordinator disposition: ACCEPT_WITH_EDITS.

Promoted boundedly into #300 coordinator evidence at docs/agents/evidence/OTC-20260815-track-a-promotion-coordination/p2-first-serialization-boundary/.

Accepted: exact processor -> distinct intermediate -> retained TProtocolWriter provenance; 0xc10960 QDataStream signed-byte serialization through retained writer; 0xc20290 structured signed-short serialization; 0xc20c70 QBuffer construction.

Coordinator edit: "first" is limited to the first concrete non-lifecycle slot directly demonstrated in the identified intermediate vtable. It is not a claim that this is the temporally first transform in the complete outbound pipeline.

Remain UNKNOWN: QBuffer temporal/data-flow ordering, framing, sequence, compression, encryption, final binary egress/socket ownership, causal local harness. Direct DualConnection writer ownership remains NOT_PROVEN.

Final source gates independently verified: static run 31893391887 SUCCESS; repository CI 31893395016 / CI / Required SUCCESS; review threads 0; final artifact 9249137864, digest sha256:c80014c2cc9b3db5b3406540e7d6d4efeef0301f63fd5858379614179b59398d.

Closing this research Draft unmerged after bounded promotion; canonical authority remains coordinator PR #300.