docs(render): finalize Campaign AR machine-local gate

docs/plans/2026-08-21-atmospheric-rendering.md

@@ -4,9 +4,10 @@
 **Status:** MACHINE-LOCAL STAGE 2 COMPLETE — the authored sun-and-moon
 shadow-source extension, Stage 1 owner gate, connected ACE matrix, dense A/B,
 long lifetime, graphical package lifecycle, shader, locked-restore, Release,
-and complete-test gates pass. A second-client remote-player row, unavailable
-physical GPU classes, and final project-owner pack-off/pack-on acceptance remain
-external closeout gates; the campaign is not yet declared shipped.
+and complete-test gates pass. A distinct-account second-client remote-player
+row, unavailable physical GPU classes, and final project-owner pack-off/pack-on
+acceptance remain external closeout gates; the campaign is not yet declared
+shipped.
 **Phase id:** **Campaign AR** — assigned by the project owner on 2026-08-22
 **Scheduling:** originally held for the post-M7 rendering-polish pass; the
 project owner explicitly authorized implementation on 2026-08-21. This
@@ -30,9 +31,9 @@ source selection, and finished every automated gate that did not require the
 project owner's physical-display judgment. The owner accepted the subsequent
 live visual/performance round on 2026-08-22 after the default Atmospheric
 exposure was corrected from 1.0 to 0.80. The machine-local Stage 2 rows are now
-complete. Remaining closeout is limited to a second connected remote player,
-unavailable physical-hardware rows, and final owner acceptance; it does not add
-another renderer feature tier.
+complete. Remaining closeout is limited to a second connected remote player on
+a distinct ACE account, unavailable physical-hardware rows, and final owner
+acceptance; it does not add another renderer feature tier.
 
 Stage 1's dense-scene regression is pinned by the connected failures already
 captured on 2026-08-22: Atmospheric fell back at 68,395, 67,581, and even
@@ -503,8 +504,11 @@ The exact commands, commits, metrics, artifacts, and evidence limits are in the
    transitions and weather, and
    fresh-process renderer/context/device-recreation assertions against a real
    ACE session, proving exact resource convergence and no stale maps/owners.
-   Remote-player diagnostics remained zero because only one account/client was
-   available; a second connected client must close that evidence row.
+   The implemented two-client gate proved the observer login and movement, but
+   ACE rejected the concurrent primary login when both used the available
+   account. The gate now accepts separate primary and observer credentials and
+   keeps them out of its artifacts; a distinct-account connected run must close
+   the authoritative nonzero `RemotePlayers` row.
 2. **EXTERNAL HARDWARE GATE.** Repeat the current clean-source RX 9070 XT
    pack-off/Low/Medium/High/Auto × 1080p/1440p/4K × capped/uncapped matrix on
    every other supported physical GPU class. The integrated-AMD Auto-to-retail
@@ -684,9 +688,9 @@ gate passed on 2026-08-22. The v1
 manifest schema, semantic binding table, compatibility/failure guide,
 validator, built-in pack, and three buildable external samples are present and
 automated. Connected graphical package lifecycle and long-run convergence pass.
-The second-client remote-player row, remaining physical GPU classes, and final
-project-owner acceptance remain open; the 30-row RX 9070 XT reference matrix is
-complete.
+The distinct-account second-client remote-player row, remaining physical GPU
+classes, and final project-owner acceptance remain open; the 30-row RX 9070 XT
+reference matrix is complete.
 
 Publish the manifest/schema, semantic binding table, sample no-op pack,
 Atmospheric pack, compatibility diagnostics, authoring/validation tool, and
@@ -926,9 +930,9 @@ and adds the current renderer's ownership and lifecycle boundaries.
 The design, implementation, Stage 1 owner gate, and every available
 machine-local Stage 2 connected, performance, lifetime, package, shader, build,
 and complete-test gate are complete. The campaign becomes **shipped** only
-after the second-client remote-player row, remaining physical-hardware rows,
-and final visual gates above pass and the project owner accepts both sides of
-the final matrix:
+after the distinct-account second-client remote-player row, remaining physical-
+hardware rows, and final visual gates above pass and the project owner accepts
+both sides of the final matrix:
 
 - **pack off:** unchanged output, performance, ownership, and lifecycle from
   acdream's authoritative default retail-faithful renderer; and