setup-claude creates wrong config filename (.claude-mcp-config.json instead of .mcp.json)

[le-dawg]

Bug

adr-kit setup-claude creates .claude-mcp-config.json — a filename Claude Code does not recognize. Claude Code reads MCP server configuration from .mcp.json (project-level) only. The generated file is silently ignored, so the MCP server is never loaded after running the setup command.

Additionally, the generated config uses "servers" as the top-level key. Claude Code requires "mcpServers".

Steps to Reproduce

adr-kit setup-claude
# Creates: .claude-mcp-config.json  ← wrong filename
# Claude Code needs: .mcp.json

Generated file (wrong)

.claude-mcp-config.json:

{
  "servers": {
    "adr-kit": {
      "command": "/path/to/adr-kit",
      "args": ["mcp-server"],
      "tools": ["adr_init", "adr_query_related", "adr_validate", ...]
    }
  }
}

Three problems:

1. Wrong filename — must be .mcp.json, not .claude-mcp-config.json
2. Wrong top-level key — must be "mcpServers", not "servers"
3. Stale tool list — the tools array references old API names (adr_init, adr_query_related, adr_validate, adr_index, adr_export_lint_config, adr_render_site) that no longer exist in the MCP server. The actual v0.2.7 tools are: adr_analyze_project, adr_preflight, adr_create, adr_approve, adr_supersede, adr_planning_context.

Expected file (correct)

.mcp.json:

{
  "mcpServers": {
    "adr-kit": {
      "command": "/path/to/adr-kit",
      "args": ["mcp-server"]
    }
  }
}

Note: the tools array is not needed in .mcp.json — Claude Code discovers available tools by querying the running MCP server.

Proposed Fix

In cli.py, _setup_claude_impl():

1. Change output filename from .claude-mcp-config.json → .mcp.json
2. Change top-level key from "servers" → "mcpServers"
3. Remove the stale hardcoded tools array, or update it to reflect the current server API

Environment

• adr-kit version: 0.2.7
• Claude Code: current
• Verified by: manually creating .mcp.json with mcpServers key — MCP server loads correctly after restart