Add PR template with CLAUDE.md compliance checklist

.github/pull_request_template.md

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+## Summary
+
+<!-- What does this PR do and why? -->
+
+## Pack(s) affected
+
+- [ ] `rh-sre`
+- [ ] `rh-developer`
+- [ ] `ocp-admin`
+- [ ] `rh-support-engineer`
+- [ ] `rh-virt`
+- [ ] Other / repo-wide
+
+## Change type
+
+- [ ] New skill
+- [ ] New agent
+- [ ] New pack
+- [ ] Update existing skill / agent
+- [ ] MCP server config (`.mcp.json`)
+- [ ] Docs / README
+- [ ] CI / tooling
+
+## CLAUDE.md compliance
+
+- [ ] Agents orchestrate skills; no direct MCP/tool calls in agents
+- [ ] Skills are single-purpose task executors
+- [ ] Skills encapsulate all tool access (MCP tools invoked only inside skills)
+- [ ] Document consultation: file is **read** with the Read tool, then declared to the user
+- [ ] No credentials hardcoded; env vars used via `${VAR}` references
+- [ ] Human-in-the-loop confirmation added for any destructive or critical operations
+
+## Validation
+
+- [ ] `make validate` passes locally
+- [ ] New/changed skills have valid YAML frontmatter (`name`, `description`)
+- [ ] New/changed agents have valid YAML frontmatter (`name`, `description`)