Publish Chimera GFX source

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+# Phase 1.0AI: offline mapping transaction
+
+Status: `HOST_MAPPING_ROLLBACK_MODEL_COMPLETE_TARGET_MAPPING_BLOCKED`
+
+Date: 2026-07-29
+
+The host-only model consumes already admitted load metadata. It models one
+new child region and one host mirror, exact file-byte copy and BSS zeroing per
+segment, the admitted RELATIVE count, one mirror-to-child copy, final segment
+protections, image sync and mirror release.
+
+Success retains the new synthetic child region only after every protection,
+sync and mirror-release step succeeds. Failure releases an acquired mirror and
+unmaps the complete newly reserved child region. A partial image is never a
+valid outcome. Cleanup failure is a hard error.
+
+The supplied tick deadline is atomic: an operation that would cross the bound
+is classified as not executed. This prevents ambiguous ownership when a
+resource-creating operation meets the deadline.
+
+The model rejects W+X segments and overlapping page-rounded protection ranges.
+It contains no allocator, memory mapping, process, ptrace or target interface.
+The next phase must bind every required primitive to official source and prove
+how new mappings and any temporary protection changes are undone on every
+failure path before target code is considered.