Class: AgentHarness::Providers::Cursor

Inherits:
Base
  • Object
show all
Defined in:
lib/agent_harness/providers/cursor.rb

Overview

Cursor AI CLI provider

Provides integration with the Cursor AI coding assistant via its CLI tool.

Examples:

Basic usage

provider = AgentHarness::Providers::Cursor.new
response = provider.send_message(prompt: "Hello!")

Constant Summary collapse

INSTALL_SCRIPT_URL = 
"https://cursor.com/install"
INSTALL_TARGET_LATEST = 
"latest"
INSTALL_BUILD = 
"2026.03.30-a5d3e17"
INSTALL_SCRIPT_SHA256 = 
"8371988b483abec13c07c10e95cccc839da81ebf9596e430d3c90835a227cbad"
INSTALL_LINUX_X64_PACKAGE_SHA256 = 
"e0d4b611db111d2dbe76474386271bff3e1dbb2cc6ddf527f9d5d5801b2ce2a0"

Constants inherited from Base

Base::COMMON_ERROR_PATTERNS, Base::DEFAULT_SMOKE_TEST_CONTRACT

Instance Attribute Summary

Attributes inherited from Base

#config, #executor, #logger

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

#configure, #initialize, #sandboxed_environment?

Methods included from Adapter

#build_mcp_flags, #dangerous_mode_flags, #health_status, included, metadata_package_name, normalize_metadata_installation, normalize_metadata_source_type, normalize_metadata_version_requirement, #parse_rate_limit_reset, #session_flags, #smoke_test, #smoke_test_contract, #supports_dangerous_mode?, #supports_sessions?, #supports_text_mode?, #supports_token_counting?, #supports_tool_control?, #validate_config, #validate_mcp_servers!

Constructor Details

This class inherits a constructor from AgentHarness::Providers::Base

Class Method Details

.available? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/agent_harness/providers/cursor.rb', line 30

def available?
  executor = AgentHarness.configuration.command_executor
  !!executor.which(binary_name)
end

.binary_name ⇒ Object 



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# File 'lib/agent_harness/providers/cursor.rb', line 26

def binary_name
  "cursor-agent"
end

.discover_models ⇒ Object 



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# File 'lib/agent_harness/providers/cursor.rb', line 72

def discover_models
  return [] unless available?

  # Cursor doesn't have a public model listing API
  # Return common model families it supports
  [
    {name: "claude-3.5-sonnet", family: "claude-3-5-sonnet", tier: "standard", provider: "cursor"},
    {name: "claude-3.5-haiku", family: "claude-3-5-haiku", tier: "mini", provider: "cursor"},
    {name: "gpt-4o", family: "gpt-4o", tier: "standard", provider: "cursor"},
    {name: "cursor-small", family: "cursor-small", tier: "mini", provider: "cursor"}
  ]
end

.firewall_requirements ⇒ Object 



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# File 'lib/agent_harness/providers/cursor.rb', line 44

def firewall_requirements
  {
    domains: [
      "cursor.com",
      "www.cursor.com",
      "downloads.cursor.com",
      "api.cursor.sh",
      "cursor.sh",
      "app.cursor.sh",
      "www.cursor.sh",
      "auth.cursor.sh",
      "auth0.com",
      "*.auth0.com"
    ],
    ip_ranges: []
  }
end

.install_metadata(version: nil) ⇒ Object 



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# File 'lib/agent_harness/providers/cursor.rb', line 102

def install_metadata(version: nil)
  install_target = normalize_install_target(version)
  linux_x64_package_url = package_url_for(os: "linux", arch: "x64")

  {
    source: {
      type: :shell_script,
      url: INSTALL_SCRIPT_URL,
      resolved_version: INSTALL_BUILD,
      default_artifact_url: linux_x64_package_url
    },
    checksum: {
      strategy: :sha256,
      targets: {
        script: {
          url: INSTALL_SCRIPT_URL,
          value: INSTALL_SCRIPT_SHA256
        },
        artifacts: {
          "linux/x64" => {
            url: linux_x64_package_url,
            value: INSTALL_LINUX_X64_PACKAGE_SHA256
          }
        }
      }
    },
    binary: {
      name: binary_name,
      path: "$HOME/.local/bin/#{binary_name}",
      suggested_global_path: "/usr/local/bin/#{binary_name}"
    },
    version: {
      default: INSTALL_TARGET_LATEST,
      supported: install_target,
      command: [binary_name, "--version"]
    }
  }
end

.instruction_file_paths ⇒ Object 



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# File 'lib/agent_harness/providers/cursor.rb', line 62

def instruction_file_paths
  [
    {
      path: ".cursorrules",
      description: "Cursor AI agent instructions",
      symlink: true
    }
  ]
end

.model_family(provider_model_name) ⇒ Object

Normalize Cursor’s model name to family name



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# File 'lib/agent_harness/providers/cursor.rb', line 86

def model_family(provider_model_name)
  # Normalize cursor naming: "claude-3.5-sonnet" -> "claude-3-5-sonnet"
  provider_model_name.gsub(/(\d)\.(\d)/, '\1-\2')
end

.provider_metadata_overrides ⇒ Object 



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# File 'lib/agent_harness/providers/cursor.rb', line 35

def provider_metadata_overrides
  {
    auth: {
      service: :cursor,
      api_family: :cursor
    }
  }
end

.provider_model_name(family_name) ⇒ Object

Convert family name to Cursor’s naming convention



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# File 'lib/agent_harness/providers/cursor.rb', line 92

def provider_model_name(family_name)
  # Cursor uses dots: "claude-3-5-sonnet" -> "claude-3.5-sonnet"
  family_name.gsub(/(\d)-(\d)/, '\1.\2')
end

.provider_name ⇒ Object 



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# File 'lib/agent_harness/providers/cursor.rb', line 22

def provider_name
  :cursor
end

.smoke_test_contract ⇒ Object 



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# File 'lib/agent_harness/providers/cursor.rb', line 141

def smoke_test_contract
  Base::DEFAULT_SMOKE_TEST_CONTRACT
end

.supports_model_family?(family_name) ⇒ Boolean

Check if this provider supports a given model family

Returns:

  • (Boolean) 


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# File 'lib/agent_harness/providers/cursor.rb', line 98

def supports_model_family?(family_name)
  family_name.match?(/^(claude|gpt|cursor)-/)
end

Instance Method Details

#auth_type ⇒ Object 



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# File 'lib/agent_harness/providers/cursor.rb', line 209

def auth_type
  :oauth
end

#capabilities ⇒ Object 



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# File 'lib/agent_harness/providers/cursor.rb', line 180

def capabilities
  {
    streaming: false,
    file_upload: true,
    vision: false,
    tool_use: true,
    json_mode: false,
    mcp: true,
    dangerous_mode: false
  }
end

#configuration_schema ⇒ Object 



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# File 'lib/agent_harness/providers/cursor.rb', line 172

def configuration_schema
  {
    fields: [],
    auth_modes: [:oauth],
    openai_compatible: false
  }
end

#display_name ⇒ Object 



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# File 'lib/agent_harness/providers/cursor.rb', line 168

def display_name
  "Cursor AI"
end

#error_patterns ⇒ Object 



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# File 'lib/agent_harness/providers/cursor.rb', line 226

def error_patterns
  {
    rate_limited: [
      /rate.?limit/i,
      /too.?many.?requests/i,
      /\b429\b/
    ],
    auth_expired: [
      /authentication.*error/i,
      /invalid.*credentials/i,
      /unauthorized/i
    ],
    transient: [
      /timeout/i,
      /connection.*error/i,
      /temporary/i
    ]
  }
end

#execution_semantics ⇒ Object 



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# File 'lib/agent_harness/providers/cursor.rb', line 213

def execution_semantics
  {
    prompt_delivery: :stdin,
    output_format: :text,
    sandbox_aware: false,
    uses_subcommand: false,
    non_interactive_flag: "-p",
    legitimate_exit_codes: [0],
    stderr_is_diagnostic: true,
    parses_rate_limit_reset: false
  }
end

#fetch_mcp_servers ⇒ Object 



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# File 'lib/agent_harness/providers/cursor.rb', line 204

def fetch_mcp_servers
  # Try CLI first, then config file
  fetch_mcp_servers_cli || fetch_mcp_servers_config
end

#name ⇒ Object 



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# File 'lib/agent_harness/providers/cursor.rb', line 164

def name
  "cursor"
end

#send_message(prompt:, **options) ⇒ Object

Override send_message to send prompt via stdin



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# File 'lib/agent_harness/providers/cursor.rb', line 247

def send_message(prompt:, **options)
  log_debug("send_message_start", prompt_length: prompt.length, options: options.keys)

  # Coerce provider_runtime from Hash if needed (same as Base#send_message)
  options = normalize_provider_runtime(options)
  runtime = options[:provider_runtime]

  # Normalize and validate MCP servers (same as Base#send_message)
  options = normalize_mcp_servers(options)
  validate_mcp_servers!(options[:mcp_servers]) if options[:mcp_servers]&.any?

  # Build command (without prompt in args - we send via stdin)
  command = [self.class.binary_name, "-p"]
  command.concat(runtime.flags) if runtime&.flags&.any?

  # Calculate timeout
  timeout = options[:timeout] || @config.timeout || default_timeout

  # Execute command with prompt on stdin
  env = build_env(options)
  preparation = build_execution_preparation(options)
  start_time = Time.now
  result = execute_with_timeout(
    command,
    timeout: timeout,
    env: env,
    stdin_data: prompt,
    preparation: preparation,
    **command_execution_options(options)
  )
  duration = Time.now - start_time

  # Parse response
  response = parse_response(result, duration: duration)
  # Runtime model is a per-request override and always takes precedence
  # over both the config-level model and whatever parse_response returned.
  # See Base#send_message for rationale.
  if runtime&.model
    response = Response.new(
      output: response.output,
      exit_code: response.exit_code,
      duration: response.duration,
      provider: response.provider,
      model: runtime.model,
      tokens: response.tokens,
      metadata: response.metadata,
      error: response.error
    )
  end

  # Track tokens
  track_tokens(response) if response.tokens

  log_debug("send_message_complete", duration: duration)

  response
rescue McpConfigurationError, McpUnsupportedError, McpTransportUnsupportedError
  raise
rescue => e
  handle_error(e, prompt: prompt, options: options)
end

#supported_mcp_transports ⇒ Object

Cursor supports MCP for fetching existing server configurations (via fetch_mcp_servers) but does not support injecting request-time MCP servers into CLI invocations. Returning an empty list causes validate_mcp_servers! to raise McpUnsupportedError with a clear message.



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# File 'lib/agent_harness/providers/cursor.rb', line 200

def supported_mcp_transports
  []
end

#supports_mcp? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/agent_harness/providers/cursor.rb', line 192

def supports_mcp?
  true
end