Initial MCP server commit

AGENT.common.md

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+# AGENT Common Rules
+
+Reusable baseline rules that are not tied to this repository.
+
+## Communication (MUST)
+- Answer first, then request approval if needed.
+- Concise, meaningful, no filler.
+- Do not end response with only procedural choice.
+- In scenarios where local configuration, secrets, or notification settings may be needed, automatically check and use `.env.local` when it exists and is relevant; if it is missing but clearly required, state that once, use `.env.example` as the schema when available, and name the required keys without inventing values; never commit `.env.local` or print secret values.
+
+Approval/clarification:
+- ask once, no repetition
+- binary -> yes/no
+- multiple -> numbered options + brief context
+- ask dependent questions sequentially, not in one message
+- if one decision changes or gates the next step, ask the prerequisite decision first and wait for the answer before asking the next one
+- do not combine branch selection with operational approval in the same message
+
+Formatting:
+- File links in repo docs/checklists: relative paths, `/`, spaces as `%20`.
+- In assistant UI responses, use the link format required by the execution environment; include relative path text when possible.
+- External links in assistant UI responses: use markdown links with a clear label, not bare URLs.
+
+## Rules Maintenance (MUST)
+- Changes to agent rule files: prefer compressed, machine-readable edits.
+- Keep updates minimal and non-duplicative: merge overlapping points, remove redundancy, preserve intent.