Invoke MCP gateway /close endpoint before kill in stop script

[Copilot]

The MCP gateway stop script was directly killing the gateway process without attempting graceful shutdown via the /close endpoint specified in MCP Gateway Specification v1.1.0 §5.1.3.

Changes

• stop_mcp_gateway.sh: Invoke /close endpoint before kill

  • POST to http://localhost:${MCP_GATEWAY_PORT}/close with Authorization header
  • Wait 10 seconds for graceful container termination
  • Fallback to SIGTERM → SIGKILL if endpoint fails or unavailable

• start_mcp_gateway.sh: Export gateway configuration to step outputs

  • Save gateway-port and gateway-api-key to $GITHUB_OUTPUT
  • Enable stop step to authenticate and invoke close endpoint

• Compiler: Wire gateway configuration to stop step

  • Pass MCP_GATEWAY_PORT and MCP_GATEWAY_API_KEY as environment variables
  • Read from start-mcp-gateway step outputs

Behavior

# Stop script now attempts graceful shutdown first
curl -X POST -H "Authorization: ${API_KEY}" http://localhost:${PORT}/close
# Gateway terminates containers, cleans up resources, exits gracefully
# Only falls back to kill if endpoint unreachable or times out

Per spec, the /close endpoint stops accepting requests, completes in-flight operations, terminates containers (SIGTERM → SIGKILL), and exits cleanly.

Original prompt

Update close MCP gateway script to try to invoke the /close endpoint before issuing a kill message.

See MCP gateway specification

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