Class: AgentHarness::Providers::Anthropic

Inherits:
Base
  • Object
show all
Includes:
McpConfigFileSupport, RateLimitResetParsing
Defined in:
lib/agent_harness/providers/anthropic.rb

Overview

Anthropic Claude Code CLI provider

Provides integration with the Claude Code CLI tool for AI-powered coding assistance.

Examples:

Basic usage

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

Constant Summary collapse

MODEL_PATTERN =

Model name pattern for Anthropic Claude models

/^claude-[\d.-]+-(?:opus|sonnet|haiku)(?:-\d{8})?$/i
SUPPORTED_CLI_VERSION = 
"2.1.92"
SUPPORTED_CLI_REQUIREMENT = 
Gem::Requirement.new(">= #{SUPPORTED_CLI_VERSION}", "< 2.2.0").freeze
VALID_VERSION_PATTERN =

Matches semver (e.g. “2.1.92”), optional pre-release (e.g. “2.1.92-beta.1”), or channel tokens (e.g. “latest”, “stable”).

/\A(?:\d+\.\d+\.\d+(?:-[a-zA-Z0-9.]+)?|latest|stable)\z/
CHAT_MODELS = 
%w[claude-sonnet-4-20250514 claude-haiku-4-20250414 claude-opus-4-20250514].freeze

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 included from McpConfigFileSupport

#cleanup_mcp_tempfiles!, #write_mcp_config_file

Methods included from RateLimitResetParsing

#parse_rate_limit_reset

Methods inherited from Base

#cli_env_overrides, #configure, #initialize, #parse_container_output, #parse_rate_limit_reset, #parse_test_error, #preflight_check, #sandboxed_environment?, #send_chat_message, #test_command_overrides

Methods included from Adapter

#auth_lock_config, #config_file_content, #health_status, included, metadata_package_name, #noisy_error_patterns, normalize_metadata_installation, normalize_metadata_source_type, normalize_metadata_version_requirement, #notify_hook_content, #parse_rate_limit_reset, #preflight_check, #session_flags, #smoke_test, #smoke_test_contract, #supports_dangerous_mode?, #supports_sessions?, #translate_error, #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/anthropic.rb', line 95

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

.binary_name ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 34

def binary_name
  "claude"
end

.discover_models ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 133

def discover_models
  return [] unless available?

  begin
    require "open3"
    output, _, status = Open3.capture3("claude", "models", "list", {timeout: 10})
    return [] unless status.success?

    parse_models_list(output)
  rescue => e
    AgentHarness.logger&.debug("[AgentHarness::Anthropic] Model discovery failed: #{e.message}")
    []
  end
end

.firewall_requirements ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 112

def firewall_requirements
  {
    domains: [
      "api.anthropic.com",
      "claude.ai",
      "console.anthropic.com"
    ],
    ip_ranges: []
  }
end

.install_contract(version: nil) ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 38

def install_contract(version: nil)
  target_version = version.nil? ? SUPPORTED_CLI_VERSION : version
  target_version = target_version.strip if target_version.respond_to?(:strip)
  validate_version!(target_version)
  version_requirement = SUPPORTED_CLI_REQUIREMENT.requirements
    .map { |op, ver| "#{op} #{ver}" }
    .join(", ")
  channel_token = %w[latest stable].include?(target_version.to_s)

  warning = "Review the downloaded installer before execution and verify any published checksum or signature metadata when available."
  if channel_token
    warning += " Channel '#{target_version}' is not pinned; the resolved version may fall " \
      "outside the supported range (#{version_requirement}). Verify the installed version " \
      "after installation."
  end

  {
    provider: provider_name,
    binary_name: binary_name,
    binary_paths: [
      "$HOME/.local/bin/claude",
      binary_name
    ],
    install: {
      strategy: :shell,
      source: "official",
      command: "tmp_script=$(mktemp) && trap 'rm -f \"$tmp_script\"' EXIT && curl -fsSL https://claude.ai/install.sh -o \"$tmp_script\" && bash \"$tmp_script\" #{Shellwords.shellescape(target_version)}",
      warning: warning,
      post_install_binary_path: "$HOME/.local/bin/claude",
      # When a channel token is used, include the requirement so
      # consumers can validate the installed version post-install.
      version_not_pinned: channel_token
    },
    supported_versions: {
      default: SUPPORTED_CLI_VERSION,
      requirement: version_requirement,
      channel: "stable"
    },
    runtime_contract: {
      available_via: binary_name,
      build_command: [
        binary_name,
        "--print",
        "--output-format=json"
      ],
      required_features: [
        "print_mode",
        "json_output",
        "mcp_config",
        "mcp_list",
        "dangerously_skip_permissions",
        "models_list"
      ]
    }
  }
end

.instruction_file_paths ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 123

def instruction_file_paths
  [
    {
      path: "CLAUDE.md",
      description: "Claude Code CLI agent instructions",
      symlink: true
    }
  ]
end

.model_family(provider_model_name) ⇒ Object

Normalize a provider-specific model name to its model family



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# File 'lib/agent_harness/providers/anthropic.rb', line 149

def model_family(provider_model_name)
  provider_model_name.sub(/-\d{8}$/, "")
end

.parse_cli_json_envelope(json_string) ⇒ Hash?

Parse a raw Claude CLI –output-format=json envelope into its components.

Downstream callers that capture Claude CLI stdout directly (e.g. container execution plans) can use this to extract the assistant text, error state, token usage, and structured metadata without re-implementing the parsing.

Parameters:

  • json_string (String) —

    raw JSON envelope from Claude CLI stdout

Returns:

  • (Hash, nil) —

    parsed components or nil if not a valid envelope

    • :output [String] the assistant’s final text (the “result” field)

    • :error [String, nil] error message if is_error was true

    • :tokens [Hash, nil] output:, total: token counts

    • :metadata [Hash] structured metadata (cost_usd, session_id, etc.)



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# File 'lib/agent_harness/providers/anthropic.rb', line 183

def parse_cli_json_envelope(json_string)
  return nil if json_string.nil? || json_string.empty?

  parsed = JSON.parse(json_string)
  return nil unless parsed.is_a?(Hash) && parsed.key?("result")

  output = parsed["result"]
  error = nil

  if parsed["is_error"]
    error = classify_error_message(output || "Unknown Claude CLI error")
  end

  tokens = extract_tokens(parsed)
  metadata = extract_envelope_metadata(parsed)

  {output: output, error: error, tokens: tokens, metadata: metadata}
rescue JSON::ParserError
  nil
end

.provider_metadata_overrides ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 100

def provider_metadata_overrides
  {
    auth: {
      service: :anthropic,
      api_family: :anthropic
    },
    identity: {
      bot_usernames: %w[claude anthropic]
    }
  }
end

.provider_model_name(family_name) ⇒ Object

Convert a model family name to the provider’s preferred model name



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# File 'lib/agent_harness/providers/anthropic.rb', line 154

def provider_model_name(family_name)
  family_name
end

.provider_name ⇒ Object 



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

def provider_name
  :claude
end

.smoke_test_contract ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 167

def smoke_test_contract
  Base::DEFAULT_SMOKE_TEST_CONTRACT
end

.supports_chat? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/agent_harness/providers/anthropic.rb', line 163

def supports_chat?
  true
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/anthropic.rb', line 159

def supports_model_family?(family_name)
  MODEL_PATTERN.match?(family_name)
end

Instance Method Details

#api_key_env_var_names ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 400

def api_key_env_var_names = ["ANTHROPIC_API_KEY"]

#api_key_unset_vars ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 402

def api_key_unset_vars = ["ANTHROPIC_BASE_URL", "ANTHROPIC_HEADER_X_AGENT_RUN_ID", "ANTHROPIC_HEADER_X_PROXY_TOKEN"]

#auth_type ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 459

def auth_type
  :oauth
end

#build_mcp_flags(mcp_servers, working_dir: nil) ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 414

def build_mcp_flags(mcp_servers, working_dir: nil)
  return [] if mcp_servers.empty?

  config_path = write_mcp_config_file(mcp_servers, working_dir: working_dir)
  ["--mcp-config", config_path]
end

#build_runtime_chat_transport(runtime) ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 443

def build_runtime_chat_transport(runtime)
  TextTransport.new(
    base_url: runtime.chat_base_url || TextTransport::ANTHROPIC_API_URL,
    api_key: runtime.chat_api_key || resolve_text_mode_api_key,
    logger: @logger
  )
end

#capabilities ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 367

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

#chat_models ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 435

def chat_models
  CHAT_MODELS
end

#chat_transport ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 439

def chat_transport
  @chat_transport ||= TextTransport.new(api_key: resolve_text_mode_api_key, logger: @logger)
end

#chat_transport_type ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 451

def chat_transport_type
  :anthropic
end

#configuration_schema ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 350

def configuration_schema
  {
    fields: [
      {
        name: :model,
        type: :string,
        label: "Model",
        required: false,
        hint: "Claude model to use (e.g. claude-3-5-sonnet-20241022)",
        accepts_arbitrary: false
      }
    ],
    auth_modes: [:oauth],
    openai_compatible: false
  }
end

#dangerous_mode_flags ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 455

def dangerous_mode_flags
  ["--dangerously-skip-permissions"]
end

#display_name ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 346

def display_name
  "Anthropic Claude CLI"
end

#error_classification_patterns ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 537

def error_classification_patterns
  super.merge(
    abort: [
      /free tier limit reached/i,
      /please upgrade to a paid plan/i
    ]
  )
end

#error_patterns ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 490

def error_patterns
  {
    rate_limited: [
      /rate.?limit/i,
      /too.?many.?requests/i,
      /\b429\b/,
      /overloaded/i,
      /session.?limit/i
    ],
    auth_expired: [
      /oauth.*token.*expired/i,
      /authentication.*error/i,
      /invalid.*api.*key/i,
      /unauthorized/i,
      /\b401\b/,
      /session.*expired/i,
      /not.*logged.*in/i,
      /login.*required/i,
      /credentials.*expired/i
    ],
    quota_exceeded: [
      /quota.*exceeded/i,
      /usage.*limit/i,
      /credit.*exhausted/i
    ],
    transient: [
      /timeout/i,
      /connection.*reset/i,
      /temporary.*error/i,
      /service.*unavailable/i,
      /\b503\b/,
      /\b502\b/,
      /\b504\b/
    ],
    permanent: [
      /invalid.*model/i,
      /unsupported.*operation/i,
      /not.*found/i,
      /\b404\b/,
      /bad.*request/i,
      /\b400\b/,
      /model.*deprecated/i,
      /end-of-life/i
    ]
  }
end

#execution_semantics ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 477

def execution_semantics
  {
    prompt_delivery: :arg,
    output_format: :json,
    sandbox_aware: true,
    uses_subcommand: false,
    non_interactive_flag: "--print",
    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/anthropic.rb', line 546

def fetch_mcp_servers
  return [] unless self.class.available?

  begin
    result = @executor.execute(["claude", "mcp", "list"], timeout: 5)
    return [] unless result.success?

    parse_claude_mcp_output(result.stdout)
  rescue => e
    log_debug("fetch_mcp_servers_failed", error: e.message)
    []
  end
end

#name ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 342

def name
  "anthropic"
end

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



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# File 'lib/agent_harness/providers/anthropic.rb', line 389

def plan_execution(prompt:, **options)
  if options[:mode] == :text
    raise ProviderError,
      "Anthropic text mode uses the HTTP transport and does not produce a CLI execution plan"
  end

  super
ensure
  cleanup_mcp_tempfiles!
end

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



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# File 'lib/agent_harness/providers/anthropic.rb', line 379

def send_message(prompt:, **options)
  if options[:mode] == :text
    return send_text_message(prompt, **options.except(:mode))
  end

  super
ensure
  cleanup_mcp_tempfiles!
end

#subscription_unset_vars ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 404

def subscription_unset_vars = ["ANTHROPIC_API_KEY", "ANTHROPIC_BASE_URL"] + api_key_unset_vars

#supported_mcp_transports ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 410

def supported_mcp_transports
  %w[stdio http sse]
end

#supports_chat? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/agent_harness/providers/anthropic.rb', line 431

def supports_chat?
  true
end

#supports_mcp? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/agent_harness/providers/anthropic.rb', line 406

def supports_mcp?
  true
end

#supports_text_mode? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/agent_harness/providers/anthropic.rb', line 425

def supports_text_mode?
  true
end

#supports_token_counting? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/agent_harness/providers/anthropic.rb', line 463

def supports_token_counting?
  true
end

#supports_tool_control? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/agent_harness/providers/anthropic.rb', line 421

def supports_tool_control?
  true
end

#token_usage_from_api_response(body) ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 467

def token_usage_from_api_response(body)
  usage = body&.dig("usage")
  return {} unless usage

  {
    input_tokens: usage["input_tokens"].to_i,
    output_tokens: usage["output_tokens"].to_i
  }
end