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Class: Kward::PluginRegistry

Inherits:
Object
  • Object
show all
Defined in:
lib/kward/plugins/registry.rb

Overview

Loads trusted user plugin files and provides the plugin DSL.

Plugins live in the user plugin directory, run as local Ruby code, and can register slash commands, namespaced actions, model-callable tools, lifecycle callbacks, composable status renderers, prompt context, and live transcript-event observers for CLI and RPC frontends.

This registry is intentionally trust-based, not a sandbox. Keep plugin loading restricted to ConfigFiles.plugin_paths, keep workspace-local code out of the load path, and expose immutable transcript views so plugins can observe state without corrupting active conversations.

Defined Under Namespace

Classes: Context, DSL, HookHandler, InteractiveCommand, LifecycleHandler, Status, StatusSegment, TabType, Tool, Transcript, TranscriptEvent, TransportType

Constant Summary collapse

PLUGIN_API_VERSION = 
"1"
COMMAND_NAME_PATTERN = 
/\A[A-Za-z0-9][A-Za-z0-9_-]*\z/.freeze
Command =

Public registration types retained under the registry namespace.

PluginCommand
Action = 
PluginAction
STATUS_PRIORITIES = 
{ low: 0, normal: 1, high: 2 }.freeze
STATUS_SEPARATOR = 
" · "

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(reserved_commands: [], warning_sink: nil) ⇒ PluginRegistry

Creates an object for trusted plugin loading and dispatch.



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# File 'lib/kward/plugins/registry.rb', line 531

def initialize(reserved_commands: [], warning_sink: nil)
  @reserved_commands = reserved_commands.map(&:to_s)
  @warning_sink = warning_sink
  @plugins = {}
  @commands = {}
  @actions = {}
  @tools = {}
  @interactive_commands = {}
  @tab_types = {}
  @tab_types_by_id = {}
  @transports = {}
  @transports_by_id = {}
  @statuses = {}
  @status_sequence = 0
  @footer_path = nil
  @transcript_event_handlers = []
  @prompt_context_renderers = []
  @hook_handlers = []
  @lifecycle_handlers = { start: [], reload: [], shutdown: [] }
  @lifecycle_state = :loaded
  @lifecycle_mutex = Mutex.new
  @paths = []
end

Class Attribute Details

.loading_path ⇒ Object

Returns the value of attribute loading_path.



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# File 'lib/kward/plugins/registry.rb', line 519

def loading_path
  @loading_path
end

.loading_registry ⇒ Object

Returns the value of attribute loading_registry.



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# File 'lib/kward/plugins/registry.rb', line 519

def loading_registry
  @loading_registry
end

Instance Attribute Details

Returns most recent plugin file to register legacy footer output.

Returns:

  • (String, nil) —

    most recent plugin file to register legacy footer output



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# File 'lib/kward/plugins/registry.rb', line 556

def footer_path
  @footer_path
end

#paths ⇒ Array<String> (readonly)

Returns plugin files successfully loaded by this registry.

Returns:

  • (Array<String>) —

    plugin files successfully loaded by this registry



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# File 'lib/kward/plugins/registry.rb', line 559

def paths
  @paths
end

Class Method Details

.load(paths: nil, reserved_commands: [], warning_sink: nil) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 521

def load(paths: nil, reserved_commands: [], warning_sink: nil)
  warning_sink ||= ConfigFiles.warning_sink
  paths ||= ConfigFiles.plugin_paths(warning_sink: warning_sink)
  registry = new(reserved_commands: reserved_commands, warning_sink: warning_sink)
  paths.each { |path| registry.load_file(path) }
  registry
end

Instance Method Details

#action_for(id) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 582

def action_for(id)
  @actions[id.to_s]
end

#actions ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 578

def actions
  @actions.values
end

#command_for(name) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 574

def command_for(name)
  @commands[name.to_s]
end

#commands ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 570

def commands
  @commands.values
end

#compose_status(segments, max_width: nil, &measure) ⇒ Object

Composes already-rendered segments. When max_width is supplied, complete low-priority segments are removed first; the caller remains responsible for truncating a final oversized segment according to frontend rules.



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# File 'lib/kward/plugins/registry.rb', line 657

def compose_status(segments, max_width: nil, &measure)
  visible = Array(segments).dup
  return "" if visible.empty? || (!max_width.nil? && max_width.to_i <= 0)

  measure ||= ->(text) { text.to_s.length }
  width = max_width&.to_i
  while width && visible.length > 1 && measure.call(status_text(visible)) > width
    remove_lowest_priority_segment!(visible)
  end
  status_text(visible)
end

#emit_warning(message) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 960

def emit_warning(message)
  @warning_sink ? @warning_sink.call(message) : warn(message)
end

#evaluate(path: nil, id: nil, version: nil, api: nil, &block) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 747

def evaluate(path: nil, id: nil, version: nil, api: nil, &block)
  host = register_plugin_identity(id: id, version: version, api: api, path: path)
  dsl = DSL.new(self, path, host: host)
  block.arity == 1 ? block.call(dsl) : dsl.instance_eval(&block)
  self
end

#footer_renderer ⇒ Object

Backward-compatible aggregate footer renderer.



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# File 'lib/kward/plugins/registry.rb', line 635

def footer_renderer
  return nil unless status?

  lambda do |context|
    compose_status(status_segments(context))
  end
end

#hook_handlers ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 677

def hook_handlers
  @hook_handlers.dup
end

#hook_manager ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 700

def hook_manager
  manager = Hooks::Manager.new
  @hook_handlers.each do |hook|
    manager.register(hook.event, id: hook.id, source: hook.path, order: hook.order, match: hook.match, failure_policy: hook.failure_policy) do |event, context|
      hook.handler.call(event, context)
    end
  end
  manager
end

#interactive_command_for(name) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 598

def interactive_command_for(name)
  @interactive_commands[name.to_s]
end

#interactive_commands ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 594

def interactive_commands
  @interactive_commands.values
end

#load_file(path) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 733

def load_file(path)
  previous_registry = self.class.loading_registry
  previous_path = self.class.loading_path
  self.class.loading_registry = self
  self.class.loading_path = path
  Kernel.load(path, true)
  @paths << path
rescue StandardError => e
  emit_warning "Warning: skipping Kward plugin #{path}: #{e.message}"
ensure
  self.class.loading_registry = previous_registry
  self.class.loading_path = previous_path
end

#notify_transcript_event(event, context) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 721

def notify_transcript_event(event, context)
  transcript_event = transcript_event_for(event)
  return unless transcript_event

  @transcript_event_handlers.each do |entry|
    entry[:handler].call(transcript_event, context)
  rescue StandardError => e
    emit_warning "Warning: Kward plugin transcript event error in #{entry[:path]}: #{e.message}"
  end
  nil
end

#plugin_for(id) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 566

def plugin_for(id)
  @plugins[id.to_s]
end

#plugins ⇒ Array<PluginHost>

Returns identified plugins loaded by this registry.

Returns:

  • (Array<PluginHost>) —

    identified plugins loaded by this registry



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# File 'lib/kward/plugins/registry.rb', line 562

def plugins
  @plugins.values
end

#prompt_context(context) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 710

def prompt_context(context)
  parts = []
  @prompt_context_renderers.each do |entry|
    rendered = entry[:renderer].call(context)
    parts << rendered.to_s unless rendered.to_s.empty?
  rescue StandardError => e
    emit_warning "Warning: Kward plugin prompt context error in #{entry[:path]}: #{e.message}"
  end
  parts.empty? ? nil : parts.join("\n\n")
end

#prompt_context_renderers ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 673

def prompt_context_renderers
  @prompt_context_renderers.map { |entry| entry[:renderer] }
end

#register_action(name, plugin_id:, description:, schema:, path: nil, &handler) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 800

def register_action(name, plugin_id:, description:, schema:, path: nil, &handler)
  name = name.to_s
  raise "Plugin action name is invalid: #{name}" unless name.match?(COMMAND_NAME_PATTERN)
  raise "Plugin action #{plugin_id}/#{name} requires a description" if description.to_s.strip.empty?
  raise "Plugin action #{plugin_id}/#{name} requires a handler" unless handler

  id = "#{plugin_id}/#{name}"
  if @actions.key?(id)
    emit_warning "Warning: skipping duplicate Kward plugin action #{id}: #{path}"
    return nil
  end

  @actions[id] = Action.new(
    name: name,
    plugin_id: plugin_id,
    description: description.to_s,
    schema: schema,
    path: path,
    handler: handler
  )
end

#register_command(name, description: "", argument_hint: "", schema: nil, positionals: [], plugin_id: nil, path: nil, &handler) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/kward/plugins/registry.rb', line 773

def register_command(name, description: "", argument_hint: "", schema: nil, positionals: [], plugin_id: nil, path: nil, &handler)
  name = name.to_s
  raise "Plugin command name is invalid: #{name}" unless name.match?(COMMAND_NAME_PATTERN)
  raise "Plugin command /#{name} requires a handler" unless handler
  raise ArgumentError, "Plugin command /#{name} positionals require a schema" if schema.nil? && !Array(positionals).empty?

  if @reserved_commands.include?(name)
    emit_warning "Warning: skipping Kward plugin command /#{name}: reserved command"
    return nil
  end
  if @commands.key?(name)
    emit_warning "Warning: skipping duplicate Kward plugin command /#{name}: #{path}"
    return nil
  end

  @commands[name] = Command.new(
    name: name,
    description: description.to_s,
    argument_hint: argument_hint.to_s,
    schema: schema,
    positionals: positionals,
    plugin_id: plugin_id,
    path: path,
    handler: handler
  )
end

#register_footer(plugin_id: nil, path: nil, &renderer) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 916

def register_footer(plugin_id: nil, path: nil, &renderer)
  raise "Plugin footer requires a renderer" unless renderer

  id = if plugin_id
         "#{plugin_id}/footer"
       else
         available_legacy_status_id("legacy/#{legacy_status_source(path)}")
       end
  @status_sequence += 1 unless @statuses.key?(id)
  @statuses[id] = Status.new(
    id: id,
    order: 100,
    priority: :normal,
    path: path,
    renderer: renderer,
    sequence: @statuses[id]&.sequence || @status_sequence
  )
  @footer_path = path
end

#register_hook(event, id: nil, description: "", order: 100, match: nil, failure_policy: nil, path: nil, &handler) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 984

def register_hook(event, id: nil, description: "", order: 100, match: nil, failure_policy: nil, path: nil, &handler)
  event = event.to_s
  raise "Plugin hook event is required" if event.empty?
  raise "Plugin hook #{event} requires a handler" unless handler

  @hook_handlers << HookHandler.new(
    event: event,
    id: id&.to_s || "#{File.basename(path.to_s.empty? ? "plugin" : path)}:#{event}:#{@hook_handlers.length + 1}",
    description: description.to_s,
    path: path,
    order: order.to_i,
    match: match,
    failure_policy: failure_policy,
    handler: handler
  )
end

#register_interactive_command(name, rows:, fps: 30, description: "", argument_hint: "", path: nil, &handler) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 842

def register_interactive_command(name, rows:, fps: 30, description: "", argument_hint: "", path: nil, &handler)
  name = name.to_s
  raise "Interactive command name is invalid: #{name}" unless name.match?(COMMAND_NAME_PATTERN)
  raise "Interactive command /#{name} requires a handler" unless handler

  if @reserved_commands.include?(name) || @commands.key?(name)
    emit_warning "Warning: skipping Kward interactive command /#{name}: reserved command"
    return nil
  end
  if @interactive_commands.key?(name)
    emit_warning "Warning: skipping duplicate Kward interactive command /#{name}: #{path}"
    return nil
  end

  @interactive_commands[name] = InteractiveCommand.new(
    name: name,
    description: description.to_s,
    argument_hint: argument_hint.to_s,
    rows: [[rows.to_i, 1].max, 1].max,
    fps: [[fps.to_f, 1].max, 120].min,
    path: path,
    handler: handler
  )
end

#register_lifecycle(event, host:, path: nil, &handler) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/kward/plugins/registry.rb', line 976

def register_lifecycle(event, host:, path: nil, &handler)
  event = event.to_sym
  raise ArgumentError, "Unknown plugin lifecycle event: #{event}" unless @lifecycle_handlers.key?(event)
  raise ArgumentError, "Plugin lifecycle #{event} requires a handler" unless handler

  @lifecycle_handlers[event] << LifecycleHandler.new(event: event, host: host, path: path, handler: handler)
end

#register_plugin_identity(id:, version:, api:, path: nil) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/kward/plugins/registry.rb', line 754

def register_plugin_identity(id:, version:, api:, path: nil)
  values = [id, version, api]
  return nil if values.all?(&:nil?)
  raise ArgumentError, "Plugin id, version, and api are required together" if values.any?(&:nil?)

  id = id.to_s
  api = api.to_s
  raise ArgumentError, "Unsupported Kward plugin API #{api.inspect} for #{id}; supported API: #{PLUGIN_API_VERSION}" unless api == PLUGIN_API_VERSION
  raise ArgumentError, "Duplicate Kward plugin id: #{id}" if @plugins.key?(id)

  @plugins[id] = PluginHost.new(
    id: id,
    version: version,
    api_version: api,
    source_path: path,
    warning_sink: method(:emit_warning)
  )
end

#register_prompt_context(path: nil, &renderer) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 970

def register_prompt_context(path: nil, &renderer)
  raise "Plugin prompt context requires a renderer" unless renderer

  @prompt_context_renderers << { path: path, renderer: renderer }
end

#register_status(name, plugin_id:, order: 100, priority: :normal, path: nil, &renderer) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 936

def register_status(name, plugin_id:, order: 100, priority: :normal, path: nil, &renderer)
  name = name.to_s
  raise "Plugin status name is invalid: #{name}" unless name.match?(COMMAND_NAME_PATTERN)
  raise "Plugin status #{plugin_id}/#{name} requires a renderer" unless renderer

  id = "#{plugin_id}/#{name}"
  if @statuses.key?(id)
    emit_warning "Warning: skipping duplicate Kward plugin status #{id}: #{path}"
    return nil
  end

  order = Integer(order)
  priority = normalize_status_priority(priority)
  @status_sequence += 1
  @statuses[id] = Status.new(
    id: id,
    order: order,
    priority: priority,
    path: path,
    renderer: renderer,
    sequence: @status_sequence
  )
end

#register_tab_type(name, id:, title: nil, singleton: nil, rpc: false, transport: false, local: true, transcript_events: false, api: nil, capabilities: nil, plugin_id: nil, path: nil, &handler) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 867

def register_tab_type(name, id:, title: nil, singleton: nil, rpc: false, transport: false, local: true, transcript_events: false, api: nil, capabilities: nil, plugin_id: nil, path: nil, &handler)
  name = name.to_s
  id = id.to_s
  raise "Plugin tab type name is invalid: #{name}" unless name.match?(COMMAND_NAME_PATTERN)
  raise "Plugin tab type id is required" if id.empty?
  raise "Plugin tab type #{name} requires a handler" unless handler

  if @tab_types.key?(name) || @tab_types_by_id.key?(id)
    emit_warning "Warning: skipping duplicate Kward plugin tab type #{id}: #{path}"
    return nil
  end

  tab_type = TabType.new(
    id: id,
    name: name,
    title: title.to_s.empty? ? name.capitalize : title.to_s,
    singleton: singleton&.to_sym,
    rpc: rpc == true,
    transport: transport == true,
    local: local == true,
    transcript_events: transcript_events == true,
    capabilities: PluginChatCapabilities.build(api: api, capabilities: capabilities),
    plugin_id: plugin_id,
    path: path,
    handler: handler
  )
  @tab_types[name] = tab_type
  @tab_types_by_id[id] = tab_type
end

#register_tool(name, description:, schema:, path: nil, &handler) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 822

def register_tool(name, description:, schema:, path: nil, &handler)
  name = name.to_s
  raise "Plugin tool name is invalid: #{name}" unless name.match?(COMMAND_NAME_PATTERN)
  raise "Plugin tool #{name} requires a description" if description.to_s.strip.empty?
  raise "Plugin tool #{name} requires a handler" unless handler

  if @tools.key?(name)
    emit_warning "Warning: skipping duplicate Kward plugin tool #{name}: #{path}"
    return nil
  end

  @tools[name] = Tool.new(
    name: name,
    description: description.to_s,
    schema: normalize_tool_schema(name, schema),
    path: path,
    handler: handler
  )
end

#register_transcript_event(path: nil, &handler) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 964

def register_transcript_event(path: nil, &handler)
  raise "Plugin transcript event requires a handler" unless handler

  @transcript_event_handlers << { path: path, handler: handler }
end

#register_transport(name, id:, capabilities: nil, execution_profile: nil, path: nil, &handler) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 897

def register_transport(name, id:, capabilities: nil, execution_profile: nil, path: nil, &handler)
  name = name.to_s
  id = id.to_s
  raise "Plugin transport name is invalid: #{name}" unless name.match?(COMMAND_NAME_PATTERN)
  raise "Plugin transport id is required" if id.empty?
  raise "Plugin transport #{name} requires a handler" unless handler

  if @transports.key?(name) || @transports_by_id.key?(id)
    emit_warning "Warning: skipping duplicate Kward plugin transport #{id}: #{path}"
    return nil
  end

  capabilities = normalize_transport_capabilities(capabilities)
  execution_profile = normalize_execution_profile(execution_profile)
  transport = TransportType.new(id: id, name: name, capabilities: capabilities, execution_profile: execution_profile, path: path, handler: handler)
  @transports[name] = transport
  @transports_by_id[id] = transport
end

#reload!(timeout: PluginResources::DEFAULT_SHUTDOWN_TIMEOUT) ⇒ Object

Invokes reload callbacks on the old registry and cleans up all resources.



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# File 'lib/kward/plugins/registry.rb', line 691

def reload!(timeout: PluginResources::DEFAULT_SHUTDOWN_TIMEOUT)
  stop_lifecycle!(:reload, timeout: timeout)
end

#shutdown!(timeout: PluginResources::DEFAULT_SHUTDOWN_TIMEOUT) ⇒ Object

Invokes shutdown callbacks and cleans up all resources.



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# File 'lib/kward/plugins/registry.rb', line 696

def shutdown!(timeout: PluginResources::DEFAULT_SHUTDOWN_TIMEOUT)
  stop_lifecycle!(:shutdown, timeout: timeout)
end

#start! ⇒ Object

Activates identified plugins and invokes their start callbacks once.



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# File 'lib/kward/plugins/registry.rb', line 682

def start!
  transition_lifecycle!(:loaded, :active) do
    @plugins.each_value(&:activate!)
    run_lifecycle_callbacks(:start)
  end
  self
end

#status? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/kward/plugins/registry.rb', line 630

def status?
  !@statuses.empty?
end

#status_segments(context) ⇒ Object

Evaluates every status renderer independently and returns display-ordered frontend-neutral segments. A broken renderer cannot hide healthy segments.



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# File 'lib/kward/plugins/registry.rb', line 645

def status_segments(context)
  @statuses.values.sort_by { |status| [status.order, status.sequence] }.filter_map do |status|
    normalize_status_segment(status, status.renderer.call(context))
  rescue StandardError => e
    emit_warning "Warning: Kward plugin status #{status.id} error in #{status.path}: #{e.message}"
    nil
  end
end

#tab_type_for(name) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 606

def tab_type_for(name)
  @tab_types[name.to_s]
end

#tab_type_for_id(id) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 610

def tab_type_for_id(id)
  @tab_types_by_id[id.to_s]
end

#tab_types ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 602

def tab_types
  @tab_types.values
end

#tool_for(name) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 590

def tool_for(name)
  @tools[name.to_s]
end

#tools ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 586

def tools
  @tools.values
end

#transcript_event_handlers ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 669

def transcript_event_handlers
  @transcript_event_handlers.map { |entry| entry[:handler] }
end

#transport_for(name) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 622

def transport_for(name)
  @transports[name.to_s]
end

#transport_for_id(id) ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 626

def transport_for_id(id)
  @transports_by_id[id.to_s]
end

#transport_tab_types ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 614

def transport_tab_types
  @tab_types.values.select(&:transport)
end

#transports ⇒ Object 



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# File 'lib/kward/plugins/registry.rb', line 618

def transports
  @transports.values
end