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/opencode-1.15.5/.github/ISSUE_TEMPLATE/bug-report.yml

@@ -0,0 +1,66 @@
+name: Bug report
+description: Report an issue that should be fixed
+body:
+  - type: textarea
+    id: description
+    attributes:
+      label: Description
+      description: Describe the bug you encountered
+      placeholder: What happened?
+    validations:
+      required: true
+
+  - type: input
+    id: plugins
+    attributes:
+      label: Plugins
+      description: What plugins are you using?
+    validations:
+      required: false
+
+  - type: input
+    id: opencode-version
+    attributes:
+      label: OpenCode version
+      description: What version of OpenCode are you using?
+    validations:
+      required: false
+
+  - type: textarea
+    id: reproduce
+    attributes:
+      label: Steps to reproduce
+      description: How can we reproduce this issue?
+      placeholder: |
+        1.
+        2.
+        3.
+    validations:
+      required: false
+
+  - type: textarea
+    id: screenshot-or-link
+    attributes:
+      label: Screenshot and/or share link
+      description: Run `/share` to get a share link, or attach a screenshot
+      placeholder: Paste link or drag and drop screenshot here
+    validations:
+      required: false
+
+  - type: input
+    id: os
+    attributes:
+      label: Operating System
+      description: what OS are you using?
+      placeholder: e.g., macOS 26.0.1, Ubuntu 22.04, Windows 11
+    validations:
+      required: false
+
+  - type: input
+    id: terminal
+    attributes:
+      label: Terminal
+      description: what terminal are you using?
+      placeholder: e.g., iTerm2, Ghostty, Alacritty, Windows Terminal
+    validations:
+      required: false