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/.opencode/command/spellcheck.md

@@ -0,0 +1,5 @@
+---
+description: spellcheck all markdown file changes
+---
+
+Look at all the unstaged changes to markdown (.md, .mdx) files, pull out the lines that have changed, and check for spelling and grammar errors.