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

RATE_LIMIT_HEADER_LIMIT =

Anthropic rate-limit response headers exposing quota/rate information. These are surfaced on normal /v1/messages responses and parsed by #update_quota_from_headers to opportunistically refresh cached quota without making a dedicated API call.

"anthropic-ratelimit-tokens-limit"
RATE_LIMIT_HEADER_REMAINING = 
"anthropic-ratelimit-tokens-remaining"
RATE_LIMIT_HEADER_RESET = 
"anthropic-ratelimit-tokens-reset"
MODEL_PATTERN =

Model name pattern for Anthropic Claude models

/^claude-[\d.-]+-(?:opus|sonnet|haiku)(?:-\d{8})?$/i
SUPPORTED_CLI_VERSION = 
"2.1.238"
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

#check_quota, #cli_env_overrides, #configure, #initialize, #parse_container_output, #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, #heartbeat_integration, included, metadata_package_name, #noisy_error_patterns, normalize_metadata_installation, normalize_metadata_runtime_requirements, 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_activity_heartbeat?, #supports_dangerous_mode?, #supports_message_tool_injection?, #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 103

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 42

def binary_name
  "claude"
end

.discover_models ⇒ Object 



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

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 120

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 46

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 131

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 157

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 191

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

  cleaned = json_string.lines.reject { |line|
    line.include?('"type":"session.') || line.include?('"type": "session.')
  }.join.strip
  return nil if cleaned.empty?

  parsed = JSON.parse(cleaned)
  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 108

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 162

def provider_model_name(family_name)
  family_name
end

.provider_name ⇒ Object 



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

def provider_name
  :claude
end

.smoke_test_contract ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 175

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 171

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 167

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 442

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 444

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 518

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 475

def build_mcp_flags(mcp_servers, working_dir: nil)
  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 502

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 406

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 494

def chat_models
  CHAT_MODELS
end

#chat_transport ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 498

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 510

def chat_transport_type
  :anthropic
end

#configuration_schema ⇒ Object 



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

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 514

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

#display_name ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 385

def display_name
  "Anthropic Claude CLI"
end

#error_classification_patterns ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 596

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 549

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 536

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 605

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 381

def name
  "anthropic"
end

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



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

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 418

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

  super
ensure
  cleanup_mcp_tempfiles!
end

#subscription_unset_vars ⇒ Object 



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# File 'lib/agent_harness/providers/anthropic.rb', line 446

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 471

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 490

def supports_chat?
  true
end

#supports_mcp? ⇒ Boolean

Returns:

  • (Boolean) 


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

def supports_mcp?
  true
end

#supports_text_mode? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/agent_harness/providers/anthropic.rb', line 484

def supports_text_mode?
  true
end

#supports_token_counting? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/agent_harness/providers/anthropic.rb', line 522

def supports_token_counting?
  true
end

#supports_tool_control? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/agent_harness/providers/anthropic.rb', line 480

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 526

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

#update_quota_from_headers(headers) ⇒ AgentHarness::QuotaStatus?

Opportunistically refresh quota info from Anthropic rate-limit headers observed on a normal /v1/messages response.

Parameters:

  • headers (Hash{String=>String}, Net::HTTPHeader) —

    response headers

Returns:



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# File 'lib/agent_harness/providers/anthropic.rb', line 453

def update_quota_from_headers(headers)
  limit_value = header_value(headers, RATE_LIMIT_HEADER_LIMIT)
  remaining_value = header_value(headers, RATE_LIMIT_HEADER_REMAINING)
  return nil unless limit_value || remaining_value

  QuotaStatus.new(
    available: true,
    remaining: remaining_value&.to_i,
    limit: limit_value&.to_i,
    reset_at: parse_rate_limit_header_reset(headers),
    unit: :tokens
  )
end