Initial commit: AirCoding V1.0.0 Alpha architecture baseline

Complete architecture document set with multi-model review remediation:
- Frozen interface contracts, runtime semantics, DB schemas
- Event/tool/error/provider registries
- Scheduler and main agent state machines
- C4 module/code views, solution architecture, baseline V1
- Multi-model review reports and joint assessment
- Phase-gate remediation complete (P0/P1/P2/UX resolved)
- Implementation plan with T-000A through T-045
- Reference folders kept as placeholders only

reference/openai-codex/.github/workflows/zstd

@@ -0,0 +1,46 @@
+#!/usr/bin/env dotslash
+
+// This DotSlash file wraps zstd for Windows runners.
+// The upstream release provides win32/win64 binaries; for windows-aarch64 we
+// use the win64 artifact via Windows x64 emulation.
+{
+  "name": "zstd",
+  "platforms": {
+    "windows-x86_64": {
+      "size": 1747181,
+      "hash": "sha256",
+      "digest": "acb4e8111511749dc7a3ebedca9b04190e37a17afeb73f55d4425dbf0b90fad9",
+      "format": "zip",
+      "path": "zstd-v1.5.7-win64/zstd.exe",
+      "providers": [
+        {
+          "url": "https://github.com/facebook/zstd/releases/download/v1.5.7/zstd-v1.5.7-win64.zip"
+        },
+        {
+          "type": "github-release",
+          "repo": "facebook/zstd",
+          "tag": "v1.5.7",
+          "name": "zstd-v1.5.7-win64.zip"
+        }
+      ]
+    },
+    "windows-aarch64": {
+      "size": 1747181,
+      "hash": "sha256",
+      "digest": "acb4e8111511749dc7a3ebedca9b04190e37a17afeb73f55d4425dbf0b90fad9",
+      "format": "zip",
+      "path": "zstd-v1.5.7-win64/zstd.exe",
+      "providers": [
+        {
+          "url": "https://github.com/facebook/zstd/releases/download/v1.5.7/zstd-v1.5.7-win64.zip"
+        },
+        {
+          "type": "github-release",
+          "repo": "facebook/zstd",
+          "tag": "v1.5.7",
+          "name": "zstd-v1.5.7-win64.zip"
+        }
+      ]
+    }
+  }
+}