Initial commit: opencode config with 32 skills, 3 agents, 11 MCPs

- Cross-platform install scripts (Windows PowerShell + Unix bash)
- Template-based config generation with env var support
- Skills: coding-standards, frontend-patterns, backend-patterns,
  security-review, tdd-workflow, e2e-testing, deep-research,
  exa-search, content-engine, crosspost, x-api, and 20 more
- Agents: explorer, reviewer, docs-researcher
- MCPs: codegraph, brave-search, playwright, github, context7,
  exa, memory, sequential-thinking, git, filesystem

skills/exa-search/agents/openai.yaml

@@ -0,0 +1,7 @@
+interface:
+  display_name: "Exa Search"
+  short_description: "Neural search via Exa MCP"
+  brand_color: "#8B5CF6"
+  default_prompt: "Use $exa-search to search web, code, or company data through Exa."
+policy:
+  allow_implicit_invocation: true