class RubyLLM::Browser::Doctor

Read-only preflight diagnostics for a live browser deployment.

The Doctor never makes a network call, never starts a session and never prints a credential. It reports the version pins, the environment overrides that the SDK would otherwise honour, and whether the configured backend is qualified to start a session. A ‘:fail` check means live use must not proceed.

report = RubyLLM::Browser::Doctor.new(backend: backend).report
raise report[:summary] unless report[:ok]

Constants

STATUSES

Attributes

backend[R]

env[R]

Public Class Methods

new(backend: nil, env: ENV) click to toggle source

@param backend [Backend, nil] @param env [Hash] environment to inspect; injectable for tests

# File lib/ruby_llm/browser/doctor.rb, line 21
def initialize(backend: nil, env: ENV)
  @backend = backend
  @env = env
end

Public Instance Methods

base_url_check() click to toggle source

# File lib/ruby_llm/browser/doctor.rb, line 101
def base_url_check
  present = StagehandBackend::ENV_OVERRIDE_KEYS.select { |key| !env[key].to_s.empty? }
  return nil if present.empty?

  check(:base_url_override, :warn,
        "#{present.join(", ")} set; the adapter passes an explicit base_url so the override is ignored")
end

check(name, status, detail) click to toggle source

# File lib/ruby_llm/browser/doctor.rb, line 116
def check(name, status, detail)
  raise ArgumentError, "unknown status #{status.inspect}" unless STATUSES.include?(status)

  { name: name, status: status, detail: detail }
end

credentials_check() click to toggle source

# File lib/ruby_llm/browser/doctor.rb, line 109
def credentials_check
  missing = %w[BROWSERBASE_API_KEY MODEL_API_KEY].reject { |key| !env[key].to_s.empty? }
  return check(:credentials, :info, "both provider credentials are present in the environment") if missing.empty?

  check(:credentials, :warn, "#{missing.join(", ")} not set in the environment")
end

custom_headers_check() click to toggle source

# File lib/ruby_llm/browser/doctor.rb, line 90
def custom_headers_check
  return nil unless backend&.capabilities&.custom_headers_present?

  if backend.capabilities.custom_headers_approved?
    check(:custom_headers, :pass, "#{StagehandBackend::CUSTOM_HEADERS_ENV} is set and host-approved")
  else
    check(:custom_headers, :fail,
          "#{StagehandBackend::CUSTOM_HEADERS_ENV} is set but not host-approved; the SDK always merges it")
  end
end

egress_check() click to toggle source

# File lib/ruby_llm/browser/doctor.rb, line 66
def egress_check
  return check(:egress_isolation, :fail, "no backend was supplied") unless backend

  capabilities = backend.capabilities
  if capabilities.enforced_egress?
    check(:egress_isolation, :pass, "the backend asserts enforced, browser-side egress isolation")
  else
    check(:egress_isolation, :fail,
          "the backend does not assert enforced egress isolation; live sessions are refused")
  end
end

local_binary_check() click to toggle source

# File lib/ruby_llm/browser/doctor.rb, line 78
def local_binary_check
  return nil unless backend&.capabilities&.local_mode?

  if backend.capabilities.local_binary_pinned?
    check(:local_binary, :pass, "local mode uses a host-pinned server binary or version")
  else
    check(:local_binary, :fail,
          "local mode has no host-pinned #{StagehandBackend::PINNED_BINARY_ENV} or " \
          "#{StagehandBackend::PINNED_VERSION_ENV}; the SDK would download a binary")
  end
end

ok?(= report[:ok]) click to toggle source

# File lib/ruby_llm/browser/doctor.rb, line 39
  def ok? = report[:ok]

  private

  def ruby_llm_check
    version = Gem::Version.new(RubyLLM::VERSION)
    required = Gem::Version.new("2.0.0")
    ceiling = Gem::Version.new("3.0.0")
    if version >= required && version < ceiling
      check(:ruby_llm, :pass, "RubyLLM #{RubyLLM::VERSION} is within >= 2.0, < 3")
    else
      check(:ruby_llm, :fail, "RubyLLM #{RubyLLM::VERSION} is outside the supported range >= 2.0, < 3")
    end
  rescue StandardError => e
    check(:ruby_llm, :warn, "could not determine the RubyLLM version: #{e.class}")
  end

  def stagehand_check
    require "stagehand/version"
    unless Gem::Requirement.new("~> 3.21.0").satisfied_by?(Gem::Version.new(Stagehand::VERSION))
      return check(:stagehand, :fail, "Stagehand version is outside the tested 3.21.x series")
    end
    check(:stagehand, :pass, "stagehand #{Stagehand::VERSION} is available")
  rescue LoadError
    check(:stagehand, :warn, "the stagehand SDK is not installed; only fake backends can start")
  end

  def egress_check
    return check(:egress_isolation, :fail, "no backend was supplied") unless backend

    capabilities = backend.capabilities
    if capabilities.enforced_egress?
      check(:egress_isolation, :pass, "the backend asserts enforced, browser-side egress isolation")
    else
      check(:egress_isolation, :fail,
            "the backend does not assert enforced egress isolation; live sessions are refused")
    end
  end

  def local_binary_check
    return nil unless backend&.capabilities&.local_mode?

    if backend.capabilities.local_binary_pinned?
      check(:local_binary, :pass, "local mode uses a host-pinned server binary or version")
    else
      check(:local_binary, :fail,
            "local mode has no host-pinned #{StagehandBackend::PINNED_BINARY_ENV} or " \
            "#{StagehandBackend::PINNED_VERSION_ENV}; the SDK would download a binary")
    end
  end

  def custom_headers_check
    return nil unless backend&.capabilities&.custom_headers_present?

    if backend.capabilities.custom_headers_approved?
      check(:custom_headers, :pass, "#{StagehandBackend::CUSTOM_HEADERS_ENV} is set and host-approved")
    else
      check(:custom_headers, :fail,
            "#{StagehandBackend::CUSTOM_HEADERS_ENV} is set but not host-approved; the SDK always merges it")
    end
  end

  def base_url_check
    present = StagehandBackend::ENV_OVERRIDE_KEYS.select { |key| !env[key].to_s.empty? }
    return nil if present.empty?

    check(:base_url_override, :warn,
          "#{present.join(", ")} set; the adapter passes an explicit base_url so the override is ignored")
  end

  def credentials_check
    missing = %w[BROWSERBASE_API_KEY MODEL_API_KEY].reject { |key| !env[key].to_s.empty? }
    return check(:credentials, :info, "both provider credentials are present in the environment") if missing.empty?

    check(:credentials, :warn, "#{missing.join(", ")} not set in the environment")
  end

  def check(name, status, detail)
    raise ArgumentError, "unknown status #{status.inspect}" unless STATUSES.include?(status)

    { name: name, status: status, detail: detail }
  end

  def summary_for(checks)
    failed = checks.select { |check| check[:status] == :fail }
    return "configuration checks passed; live provider guarantees are not verified" if failed.empty?

    "blocked: #{failed.map { |check| check[:name] }.join(", ")}"
  end
end

report() click to toggle source

@return [Hash] ‘{ ok:, summary:, checks: […] }`, safe to log

# File lib/ruby_llm/browser/doctor.rb, line 27
def report
  checks = [
    ruby_llm_check, stagehand_check, egress_check, local_binary_check,
    custom_headers_check, base_url_check, credentials_check
  ].compact
  {
    ok: checks.none? { |check| check[:status] == :fail },
    summary: summary_for(checks),
    checks: checks
  }
end

ruby_llm_check() click to toggle source

# File lib/ruby_llm/browser/doctor.rb, line 43
def ruby_llm_check
  version = Gem::Version.new(RubyLLM::VERSION)
  required = Gem::Version.new("2.0.0")
  ceiling = Gem::Version.new("3.0.0")
  if version >= required && version < ceiling
    check(:ruby_llm, :pass, "RubyLLM #{RubyLLM::VERSION} is within >= 2.0, < 3")
  else
    check(:ruby_llm, :fail, "RubyLLM #{RubyLLM::VERSION} is outside the supported range >= 2.0, < 3")
  end
rescue StandardError => e
  check(:ruby_llm, :warn, "could not determine the RubyLLM version: #{e.class}")
end

stagehand_check() click to toggle source

# File lib/ruby_llm/browser/doctor.rb, line 56
def stagehand_check
  require "stagehand/version"
  unless Gem::Requirement.new("~> 3.21.0").satisfied_by?(Gem::Version.new(Stagehand::VERSION))
    return check(:stagehand, :fail, "Stagehand version is outside the tested 3.21.x series")
  end
  check(:stagehand, :pass, "stagehand #{Stagehand::VERSION} is available")
rescue LoadError
  check(:stagehand, :warn, "the stagehand SDK is not installed; only fake backends can start")
end

summary_for(checks) click to toggle source

# File lib/ruby_llm/browser/doctor.rb, line 122
def summary_for(checks)
  failed = checks.select { |check| check[:status] == :fail }
  return "configuration checks passed; live provider guarantees are not verified" if failed.empty?

  "blocked: #{failed.map { |check| check[:name] }.join(", ")}"
end