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/develop-character.md

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+# /develop-character Task
+
+When this command is used, execute the following task:
+
+<!-- Powered by BMAD™ Core -->
+
+# ------------------------------------------------------------
+
+# 3. Develop Character
+
+# ------------------------------------------------------------
+
+---
+
+task:
+id: develop-character
+name: Develop Character
+description: Produce rich character profiles with goals, flaws, arcs, and voice notes.
+persona_default: character-psychologist
+inputs:
+
+- concept-brief.md
+  steps:
+- Identify protagonist(s), antagonist(s), key side characters.
+- For each, fill character-profile-tmpl.
+- Offer advanced‑elicitation for each profile.
+  output: characters.md
+  ...