research(vfx): pin retail projectile and effect oracle

Establish the executable-backed PhysicsDesc, sequence-gate, PhysicsScript, CreateBlocking, particle-anchor, projectile, and Hidden-state behavior before changing runtime code. Correct stale blocking/threshold claims and synchronize the project instructions with the current UI architecture and matching retail binary.

Add copyright-safe packet and DAT-container fixtures plus a failing installed-DAT conformance audit for projectile shapes, typed tables, recall motion, default scripts, and raw CreateBlocking inventory.

Co-Authored-By: Codex <noreply@openai.com>

AGENTS.md

@@ -78,19 +78,17 @@ and `~/.claude/projects/.../memory/` (the latter is browsable in
 Obsidian via the `claude-memory/` junction in the repo root; see
 `memory/reference_obsidian_vault.md`).
 
-**UI strategy:** three-layer split — swappable backend (ImGui.NET +
-`Silk.NET.OpenGL.Extensions.ImGui` for Phase D.2a, custom retail-look
-toolkit for D.2b later) / stable `AcDream.UI.Abstractions` layer
-(ViewModels + Commands + `IPanel` / `IPanelRenderer`) / unchanged game
-state. **As of Phase I, ImGui hosts every dev/debug panel** — Vitals,
-Chat, Debug. The previous custom-StbTrueTypeSharp `DebugOverlay` was
-deleted in I.2; `TextRenderer` + `BitmapFont` are kept alive
-specifically for the future world-space HUD (D.6 — damage floaters,
-name plates) where ImGui can't reach into the 3D scene. D.2b remains
-the long-term retail-look path (panels reskinned one at a time using
-dat assets); ImGui persists forever as the `ACDREAM_DEVTOOLS=1`
-overlay. **All plugin-facing UI targets `AcDream.UI.Abstractions` —
-never import a backend namespace from a panel.** Full design:
+**UI strategy:** two coexisting presentation stacks over shared state,
+ViewModels, events, and commands. ImGui.NET +
+`Silk.NET.OpenGL.Extensions.ImGui` is the permanent
+`ACDREAM_DEVTOOLS=1` developer stack using `IPanel`/`IPanelRenderer`.
+Retail gameplay UI is the independent retained `UiHost`/`UiRoot` tree in
+`AcDream.App/UI`, imported from LayoutDesc/DAT assets and bound by focused
+controllers. The stable cross-stack seam is ViewModels/commands, not a backend
+swap. `TextRenderer` + `BitmapFont` also serve D.6 world-space HUD elements
+where ImGui cannot reach the 3D scene. Plugin gameplay UI uses the BCL-only
+`AcDream.Plugin.Abstractions.IUiRegistry.AddMarkupPanel` contract; plugins
+never import App or ImGui namespaces. Full design:
 [`docs/plans/2026-04-24-ui-framework.md`](docs/plans/2026-04-24-ui-framework.md).
 Memory cribs: `memory/project_chat_pipeline.md` (chat pipeline as of
 Phase I), `memory/project_input_pipeline.md` (input pipeline as of
@@ -497,10 +495,13 @@ guessing has failed twice in a row.**
 
 ### What we have
 
-- **Matching binary**: `C:\Turbine\Asheron's Call\acclient.exe`
-  v11.4186 (linker timestamp `2013-09-06 00:17:42 UTC`,
+- **Matching binary**: `C:\Users\erikn\Downloads\acclient.exe`
+  v11.4186 (linker timestamp `2013-09-06 00:17:56 UTC`,
   CodeView GUID `9e847e2f-777c-4bd9-886c-22256bb87f32`). Pairs
-  exactly with our `refs/acclient.pdb`.
+  exactly with our `refs/acclient.pdb`. The current
+  `C:\Turbine\Asheron's Call\acclient.exe` is a 2015 build with GUID
+  `08e25c14-e2a1-46d5-b056-92b2e43a7234` and must not be used for
+  this PDB/address map.
 - **Debugger**: `cdb.exe` (console WinDbg) at
   `C:\Program Files (x86)\Windows Kits\10\Debuggers\x86\cdb.exe`.
   Install via Microsoft Store WinDbg (~50 MB). 32-bit version is
@@ -519,7 +520,7 @@ guessing has failed twice in a row.**
 
 1. **Verify the binary matches the PDB:**
    ```bash
-   py tools/pdb-extract/check_exe_pdb.py "C:/Turbine/Asheron's Call/acclient.exe"
+   py tools/pdb-extract/check_exe_pdb.py "C:/Users/erikn/Downloads/acclient.exe"
    ```
    Expect: `=== MATCH: this exe pairs with our acclient.pdb ===`