Initial MCP server commit

AGENTS.md

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+# AGENTS.md
+
+## Execution Model (MUST)
+- Read this file first; treat as system-level constraints.
+- Reusable general rules (MUST read and apply): [AGENT.common.md](AGENT.common.md)
+- Reusable structured interaction rules: [AGENT.interaction.md](AGENT.interaction.md)
+- Priority:
+  1. User instructions
+  2. AGENTS.md
+  3. Applicable referenced reusable rule files
+  4. Existing code/style
+  5. Best practices
+- Prefer minimal, non-breaking changes.
+- Do not introduce unnecessary abstractions.
+
+---
+
+## Guardrails (MUST)
+
+Before commit:
+- no secrets or sensitive data
+- build passes locally
+- tests pass
+
+---
+
+## Rules Maintenance (MUST)
+- Keep updates minimal: merge redundant points, preserve intent.