Publish Chimera GFX source

docs/retroarch/phase-1.0at-offline-fd-deadline-model.md

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+# Phase 1.0AT: offline RFFDG FD/deadline model
+
+Status: `OFFLINE_OWNERSHIP_MODEL_COMPLETE_LIVE_COMPOSITION_BLOCKED`
+
+Date: 2026-07-29
+
+This phase composes the Phase-1.0AS source candidates in a fake-only ownership
+transaction. A pipe exists before the modeled `RFFDG` worker copy. The parent
+closes its write end, the worker closes its read end, and the parent assembles
+one exact Phase-1.0AQ record through a nonblocking partial-read model.
+
+One 256-tick absolute budget covers setup, EINTR, would-block and data events.
+Deadline, early EOF, overflow, a damaged record or any trailing read event
+contains the worker. Every acquired pipe end is closed and every started worker
+is terminated and reaped; a cleanup failure is itself a hard model error.
+
+The facade is scripted and imports no OS, process, clock, network or filesystem
+capability. It does not establish a real `RFFDG` composition, hard wall-clock
+preemption, bounded real reap or firmware-9.60 behavior. No target source,
+cross-build, connection, transfer or execution is authorized.