chore(agent): configure AI agents and tools

Add configuration for BMad, Claude, OpenCode, and other AI agent tools and workflows.

.claude/commands/bmad-cw/tasks/build-world.md

@@ -0,0 +1,28 @@
+# /build-world Task
+
+When this command is used, execute the following task:
+
+<!-- Powered by BMAD™ Core -->
+
+# ------------------------------------------------------------
+
+# 2. Build World
+
+# ------------------------------------------------------------
+
+---
+
+task:
+id: build-world
+name: Build World
+description: Create a concise world guide covering geography, cultures, magic/tech, and history.
+persona_default: world-builder
+inputs:
+
+- concept-brief.md
+  steps:
+- Summarize key themes from concept.
+- Draft World Guide using world-guide-tmpl.
+- Execute tasks#advanced-elicitation.
+  output: world-guide.md
+  ...