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

Constants inherited from Base

Base::COMMON_ERROR_PATTERNS

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, #parse_rate_limit_reset, #session_flags, #supports_dangerous_mode?, #supports_sessions?, #validate_config, #validate_mcp_servers!

Constructor Details

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

Class Method Details

.available? ⇒ Boolean

Returns:

  • (Boolean) 


24
25
26
27
 
# File 'lib/agent_harness/providers/cursor.rb', line 24

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

.binary_name ⇒ Object 



20
21
22
 
# File 'lib/agent_harness/providers/cursor.rb', line 20

def binary_name
  "cursor-agent"
end

.discover_models ⇒ Object 



57
58
59
60
61
62
63
64
65
66
67
68
 
# File 'lib/agent_harness/providers/cursor.rb', line 57

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 



29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
 
# File 'lib/agent_harness/providers/cursor.rb', line 29

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

.instruction_file_paths ⇒ Object 



47
48
49
50
51
52
53
54
55
 
# File 'lib/agent_harness/providers/cursor.rb', line 47

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



71
72
73
74
 
# File 'lib/agent_harness/providers/cursor.rb', line 71

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_model_name(family_name) ⇒ Object

Convert family name to Cursor’s naming convention



77
78
79
80
 
# File 'lib/agent_harness/providers/cursor.rb', line 77

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 



16
17
18
 
# File 'lib/agent_harness/providers/cursor.rb', line 16

def provider_name
  :cursor
end

.supports_model_family?(family_name) ⇒ Boolean

Check if this provider supports a given model family

Returns:

  • (Boolean) 


83
84
85
 
# File 'lib/agent_harness/providers/cursor.rb', line 83

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

Instance Method Details

#auth_type ⇒ Object 



133
134
135
 
# File 'lib/agent_harness/providers/cursor.rb', line 133

def auth_type
  :oauth
end

#capabilities ⇒ Object 



104
105
106
107
108
109
110
111
112
113
114
 
# File 'lib/agent_harness/providers/cursor.rb', line 104

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

#configuration_schema ⇒ Object 



96
97
98
99
100
101
102
 
# File 'lib/agent_harness/providers/cursor.rb', line 96

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

#display_name ⇒ Object 



92
93
94
 
# File 'lib/agent_harness/providers/cursor.rb', line 92

def display_name
  "Cursor AI"
end

#error_patterns ⇒ Object 



150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
 
# File 'lib/agent_harness/providers/cursor.rb', line 150

def error_patterns
  {
    rate_limited: [
      /rate.?limit/i,
      /too.?many.?requests/i,
      /429/
    ],
    auth_expired: [
      /authentication.*error/i,
      /invalid.*credentials/i,
      /unauthorized/i
    ],
    transient: [
      /timeout/i,
      /connection.*error/i,
      /temporary/i
    ]
  }
end

#execution_semantics ⇒ Object 



137
138
139
140
141
142
143
144
145
146
147
148
 
# File 'lib/agent_harness/providers/cursor.rb', line 137

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 



128
129
130
131
 
# File 'lib/agent_harness/providers/cursor.rb', line 128

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

#name ⇒ Object 



88
89
90
 
# File 'lib/agent_harness/providers/cursor.rb', line 88

def name
  "cursor"
end

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

Override send_message to send prompt via stdin



171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
 
# File 'lib/agent_harness/providers/cursor.rb', line 171

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)
  start_time = Time.now
  result = @executor.execute(command, timeout: timeout, stdin_data: prompt, env: env)
  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.



124
125
126
 
# File 'lib/agent_harness/providers/cursor.rb', line 124

def supported_mcp_transports
  []
end

#supports_mcp? ⇒ Boolean

Returns:

  • (Boolean) 


116
117
118
 
# File 'lib/agent_harness/providers/cursor.rb', line 116

def supports_mcp?
  true
end