WIP: Save agent roles integration work before CHORUS rebrand

- Agent roles and coordination features
- Chat API integration testing
- New configuration and workspace management

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

vendor/lukechampine.com/blake3/cpu.go

@@ -0,0 +1,10 @@
+// +build !darwin
+
+package blake3
+
+import "github.com/klauspost/cpuid/v2"
+
+var (
+	haveAVX2   = cpuid.CPU.Supports(cpuid.AVX2)
+	haveAVX512 = cpuid.CPU.Supports(cpuid.AVX512F)
+)