launch.json

{
  "version": "0.2.0",
  "configurations": [
    {
      "type": "lldb",
      "request": "launch",
      "name": "Debug Main",
      "program": "${workspaceFolder}/zig-out/bin/cici",
      "preLaunchTask": "zig build",
      "args": [],
      "cwd": "${workspaceFolder}",
      "console": "integratedTerminal"
    },
    {
      "type": "lldb",
      "request": "launch",
      "name": "Debug Test",
      "program": "${workspaceFolder}/zig-out/bin/test-binary",
      "preLaunchTask": "build_test",
      "args": [],
      "cwd": "${workspaceFolder}",
      "console": "integratedTerminal"
    }
  ],
  "inputs": [
    {
      "type": "promptString",
      "id": "testFile",
      "description": "Test file path",
      "default": "src/main.zig"
    }
  ]
}

tasks.json

{
    "version": "2.0.0",
    "tasks": [
        {
            "label": "zig build",
            "type": "shell",
            "command": "zig",
            "args": ["build"],
            "group": {
                "kind": "build",
                "isDefault": true
            }
        },
        {
            "label": "build_test",
            "type": "shell",
            "command": "zig",
            "args": [
                "test",
                "${input:testFile}",
                "--test-no-exec",
                "-femit-bin=${workspaceFolder}/zig-out/bin/test-binary"
            ],
            "group": "test"
        }
    ],
    "inputs": [
        {
            "type": "promptString",
            "id": "testFile",
            "description": "Test file path",
            "default": "src/main.zig"
        }
    ]
}