Add Salesforce CLI authentication support

[andrea9293]

Introduce Salesforce CLI authentication as a new method for connecting to Salesforce, enhancing flexibility for users. Update the README to acknowledge contributions

[tsmztech]

Hi @andrea9293 👋
Thanks for working on the Salesforce CLI authentication support - this is a great feature addition that many users will find valuable!
I've been testing your PR locally and encountered an issue I'd like to get your input on:

Environment:
Build: ✅ Successful (npm install && npm run build complete without errors)
Configuration: Using the new Salesforce CLI authentication method

Issue:
When executing MCP tools/requests, they appear to hang indefinitely:

Tool execution starts but never completes
No data is returned from any requests
No timeout occurs - requests just continue running
This happens consistently across multiple different tool calls

Questions:
Were you able to test this locally with actual Salesforce CLI authentication? If so, what was your testing setup?
Which Salesforce CLI commands/authentication flows did you test with? (e.g., sf org login web, sf org login jwt, etc.)
Do you have any debugging steps you'd recommend? Are there any logs or environment variables I should check?
Are there any specific Salesforce CLI configuration requirements? (versions, org setup, etc.)

I'd love to help troubleshoot this and get it working properly, as CLI auth would be a fantastic addition to the project!
My current setup for reference:

"salesforce": { 
  "command": "node", 
  "args": ["local_path/mcp-server-salesforce/dist/index.js"], 
  "env": { 
     "SALESFORCE_CONNECTION_TYPE": "Salesforce_CLI"
  } 
}

Thanks for your time and contribution! 🚀

[andrea9293]

i've just tested on vs code on windows

This is my setup and the request must be done in the workspace with the Salesforce project

{
    "servers": {
        "saleforce-mcp-server": {
			"type": "stdio",
			"command": "node",
			"args": [
				"C:\\path-to\\mcp-server-salesforce\\dist\\index.js"
			],
			"env": {
                "SALESFORCE_CONNECTION_TYPE": "Salesforce_CLI"
            }
		}
    }
}

here are the logs (obfuscated of sensitive information)

2025-09-10 10:05:57.520 [warning] Failed to parse message: "Connecting to Salesforce using Salesforce CLI authentication\n"
2025-09-10 10:05:57.520 [warning] Failed to parse message: "Executing Salesforce CLI command: sf org display --json in directory: path/with/your/salesforce/project"
2025-09-10 10:06:07.220 [warning] [server stderr] [Salesforce CLI] STDOUT: {
2025-09-10 10:06:07.220 [warning] [server stderr]   "status": 0,
2025-09-10 10:06:07.221 [warning] [server stderr]   "result": {
2025-09-10 10:06:07.221 [warning] [server stderr]     "id": "AAA",
2025-09-10 10:06:07.221 [warning] [server stderr]     "devHubId": "AAA",
2025-09-10 10:06:07.221 [warning] [server stderr]     "apiVersion": "65.0",
2025-09-10 10:06:07.222 [warning] [server stderr]     "accessToken": "AAA",
2025-09-10 10:06:07.222 [warning] [server stderr]     "instanceUrl": "https://AAA.scratch.my.salesforce.com",
2025-09-10 10:06:07.222 [warning] [server stderr]     "username": "[email protected]",
2025-09-10 10:06:07.223 [warning] [server stderr]     "clientId": "PlatformCLI",
2025-09-10 10:06:07.223 [warning] [server stderr]     "password": "AAA",
2025-09-10 10:06:07.223 [warning] [server stderr]     "status": "Active",
2025-09-10 10:06:07.224 [warning] [server stderr]     "expirationDate": "2025-09-26",
2025-09-10 10:06:07.224 [warning] [server stderr]     "createdBy": "[email protected]",
2025-09-10 10:06:07.224 [warning] [server stderr]     "edition": "Developer",
2025-09-10 10:06:07.224 [warning] [server stderr]     "namespace": "AAA",
2025-09-10 10:06:07.225 [warning] [server stderr]     "orgName": "AAA",
2025-09-10 10:06:07.225 [warning] [server stderr]     "createdDate": "2025-08-27T08:49:35.000+0000",
2025-09-10 10:06:07.225 [warning] [server stderr]     "signupUsername": "[email protected]",
2025-09-10 10:06:07.225 [warning] [server stderr]     "alias": "AAAScratchAI"
2025-09-10 10:06:07.226 [warning] [server stderr]   },
2025-09-10 10:06:07.226 [warning] [server stderr]   "warnings": [
2025-09-10 10:06:07.226 [warning] [server stderr]     "This command will expose sensitive information that allows for subsequent activity using your current authenticated session.\nSharing this information is equivalent to logging someone in under the current credential, resulting in unintended access and escalation of privilege.\nFor additional information, please review the authorization section of the https://developer.salesforce.com/docs/atlas.en-us.sfdx_dev.meta/sfdx_dev/sfdx_dev_auth_web_flow.htm."
2025-09-10 10:06:07.227 [warning] [server stderr]   ]
2025-09-10 10:06:07.227 [warning] [server stderr] }
2025-09-10 10:06:07.227 [warning] [server stderr] 
2025-09-10 10:06:07.228 [warning] Failed to parse message: "Connected to Salesforce org: [email protected] (AAAScratchAI)\n"