Class: Clacky::AgentConfig

Inherits:
Object
  • Object
show all
Defined in:
lib/clacky/agent_config.rb

Constant Summary collapse

CONFIG_DIR = 
File.join(Dir.home, ".clacky")
CONFIG_FILE = 
File.join(CONFIG_DIR, "config.yml")
CLAUDE_DEFAULT_MODEL =

Default model for ClaudeCode environment

"claude-sonnet-4-5"
PERMISSION_MODES = 
[:auto_approve, :confirm_safes, :confirm_all].freeze
RUNTIME_ONLY_FIELDS =

Convert to YAML format (top-level array) Auto-injected lite models (auto_injected: true) are excluded from persistence —they are regenerated at load time from the provider preset. Runtime-only fields (id, auto_injected) are stripped before writing so config.yml remains backward compatible with users on older versions.

%w[id auto_injected].freeze
FALLBACK_COOLING_OFF_SECONDS =

How long to stay on the fallback model before probing the primary again.

30 * 60

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ AgentConfig

Returns a new instance of AgentConfig.



159
160
161
162
163
164
165
166
167
168
169
170
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
 
# File 'lib/clacky/agent_config.rb', line 159

def initialize(options = {})
  @permission_mode = validate_permission_mode(options[:permission_mode])
  @max_tokens = options[:max_tokens] || 8192
  @verbose = options[:verbose] || false
  @enable_compression = options[:enable_compression].nil? ? true : options[:enable_compression]
  # Enable prompt caching by default for cost savings
  @enable_prompt_caching = options[:enable_prompt_caching].nil? ? true : options[:enable_prompt_caching]

  # Models configuration
  @models = options[:models] || []
  # Ensure every model has a stable runtime id — this is the single
  # invariant the rest of the system relies on. Regardless of how the
  # config was built (load from yml, direct .new in tests, add_model,
  # api_save_config), every model in @models will have an id.
  @models.each { |m| m["id"] ||= SecureRandom.uuid }

  @current_model_index = options[:current_model_index] || 0
  # Stable runtime id for the currently-selected model. Preferred over
  # @current_model_index because ids are immune to list reordering,
  # additions, and edits to model fields. Ids are injected at load time
  # and never persisted to config.yml (backward compatible with old files).
  # If caller didn't specify current_model_id, prefer the model marked
  # as `type: default` (the documented convention), falling back to
  # models[current_model_index] only if no default marker exists.
  @current_model_id = options[:current_model_id] ||
                      (@models.find { |m| m["type"] == "default" } || @models[@current_model_index])&.dig("id")

  # Memory and skill evolution configuration
  @memory_update_enabled = options[:memory_update_enabled].nil? ? true : options[:memory_update_enabled]
  @skill_evolution = options[:skill_evolution] || {
    enabled: true,
    auto_create_threshold: 12,
    reflection_mode: "llm_analysis"
  }

  # Per-session virtual model overlay.
  # When set, #current_model returns a *merged* hash (the resolved @models
  # entry merged with this overlay) without mutating the shared @models
  # array. Used by fork_subagent's virtual-lite path so a forked subagent
  # can run on different credentials (e.g. Haiku instead of Opus) without
  # polluting the parent agent's shared @models hashes.
  # Keys honored: "api_key", "base_url", "model", "anthropic_format".
  # @return [Hash, nil]
  @virtual_model_overlay = options[:virtual_model_overlay]
end

Instance Attribute Details

#current_model_id ⇒ Object

Returns the value of attribute current_model_id.



154
155
156
 
# File 'lib/clacky/agent_config.rb', line 154

def current_model_id
  @current_model_id
end

#current_model_index ⇒ Object

Returns the value of attribute current_model_index.



154
155
156
 
# File 'lib/clacky/agent_config.rb', line 154

def current_model_index
  @current_model_index
end

#enable_compression ⇒ Object

Returns the value of attribute enable_compression.



154
155
156
 
# File 'lib/clacky/agent_config.rb', line 154

def enable_compression
  @enable_compression
end

#enable_prompt_caching ⇒ Object

Returns the value of attribute enable_prompt_caching.



154
155
156
 
# File 'lib/clacky/agent_config.rb', line 154

def enable_prompt_caching
  @enable_prompt_caching
end

#max_tokens ⇒ Object

Returns the value of attribute max_tokens.



154
155
156
 
# File 'lib/clacky/agent_config.rb', line 154

def max_tokens
  @max_tokens
end

#memory_update_enabled ⇒ Object

Returns the value of attribute memory_update_enabled.



154
155
156
 
# File 'lib/clacky/agent_config.rb', line 154

def memory_update_enabled
  @memory_update_enabled
end

#models ⇒ Object

Returns the value of attribute models.



154
155
156
 
# File 'lib/clacky/agent_config.rb', line 154

def models
  @models
end

#permission_mode ⇒ Object

Returns the value of attribute permission_mode.



154
155
156
 
# File 'lib/clacky/agent_config.rb', line 154

def permission_mode
  @permission_mode
end

#skill_evolution ⇒ Object

Returns the value of attribute skill_evolution.



154
155
156
 
# File 'lib/clacky/agent_config.rb', line 154

def skill_evolution
  @skill_evolution
end

#verbose ⇒ Object

Returns the value of attribute verbose.



154
155
156
 
# File 'lib/clacky/agent_config.rb', line 154

def verbose
  @verbose
end

Class Method Details

.load(config_file = CONFIG_FILE) ⇒ Object

Load configuration from file



206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
 
# File 'lib/clacky/agent_config.rb', line 206

def self.load(config_file = CONFIG_FILE)
  # Load from config file first
  if File.exist?(config_file)
    data = YAML.load_file(config_file)
  else
    data = nil
  end

  # Parse models from config
  models = parse_models(data)

  # Priority: config file > CLACKY_XXX env vars > ClaudeCode env vars
  if models.empty?
    # Try CLACKY_XXX environment variables first
    if ClackyEnv.default_configured?
      models << ClackyEnv.default_model_config
    # ClaudeCode (Anthropic) environment variable support is disabled
    # elsif ClaudeCodeEnv.configured?
    #   models << {
    #     "type" => "default",
    #     "api_key" => ClaudeCodeEnv.api_key,
    #     "base_url" => ClaudeCodeEnv.base_url,
    #     "model" => CLAUDE_DEFAULT_MODEL,
    #     "anthropic_format" => true
    #   }
    end

    # Add CLACKY_LITE_XXX if configured (only when loading from env)
    if ClackyEnv.lite_configured?
      models << ClackyEnv.lite_model_config
    end
  else
    # Config file exists, but check if we need to add env-based models
    # Only add if no model with that type exists
    has_default = models.any? { |m| m["type"] == "default" }
    has_lite = models.any? { |m| m["type"] == "lite" }

    # Add CLACKY default if not in config and env is set
    if !has_default && ClackyEnv.default_configured?
      models << ClackyEnv.default_model_config
    end

    # Add CLACKY lite if not in config and env is set
    if !has_lite && ClackyEnv.lite_configured?
      models << ClackyEnv.lite_model_config
    end

    # Ensure at least one model has type: default
    # If no model has type: default, assign it to the first model
    unless models.any? { |m| m["type"] == "default" }
      models.first["type"] = "default" if models.any?
    end
  end

  # Auto-inject lite model from provider preset is **no longer materialized
  # into @models**. Lite is now a virtual, on-demand view derived from the
  # currently-selected primary model — see `#lite_model_config_for_current`.
  # This keeps @models a clean "list of user-facing models" and lets the
  # lite companion track the current model at runtime, rather than being
  # frozen at load time to whichever model happened to be the default.
  #
  # Legacy note: prior versions injected an entry here with
  # `auto_injected: true`. That flag is still honored in to_yaml for
  # safety (never persisted), but new injections never happen.

  # Ensure every model has a stable runtime id — covers env-injected
  # models (CLACKY_XXX, CLAUDE_XXX) that don't go through parse_models.
  # Ids are NOT persisted to config.yml (see to_yaml).
  models.each { |m| m["id"] ||= SecureRandom.uuid }

  # Find the index of the model marked as "default" (type: default)
  # Fall back to 0 if no model has type: default
  default_index = models.find_index { |m| m["type"] == "default" } || 0
  default_id = models[default_index] && models[default_index]["id"]

  new(models: models, current_model_index: default_index, current_model_id: default_id)
end

Instance Method Details

#activate_fallback!(fallback_model_name) ⇒ Object

Switch to fallback model and start the cooling-off clock. Idempotent — calling again while already in :fallback_active renews the timestamp.

Parameters:

  • fallback_model_name (String) —

    the fallback model to use



613
614
615
616
617
 
# File 'lib/clacky/agent_config.rb', line 613

def activate_fallback!(fallback_model_name)
  @fallback_state = :fallback_active
  @fallback_since = Time.now
  @fallback_model  = fallback_model_name
end

#add_model(model:, api_key:, base_url:, anthropic_format: false, type: nil) ⇒ Object

Add a new model configuration



494
495
496
497
498
499
500
501
502
503
 
# File 'lib/clacky/agent_config.rb', line 494

def add_model(model:, api_key:, base_url:, anthropic_format: false, type: nil)
  @models << {
    "id" => SecureRandom.uuid,
    "api_key" => api_key,
    "base_url" => base_url,
    "model" => model,
    "anthropic_format" => anthropic_format,
    "type" => type
  }.compact
end

#anthropic_format? ⇒ Boolean

Check if should use Anthropic format for current model

Returns:

  • (Boolean) 


484
485
486
 
# File 'lib/clacky/agent_config.rb', line 484

def anthropic_format?
  current_model&.dig("anthropic_format") || false
end

#api_key ⇒ Object

Get API key for current model



437
438
439
 
# File 'lib/clacky/agent_config.rb', line 437

def api_key
  current_model&.dig("api_key")
end

#api_key=(value) ⇒ Object

Set API key for current model. When a virtual overlay is active, writes into the overlay (not the shared @models hash) to keep session-level isolation.



444
445
446
447
448
449
450
451
 
# File 'lib/clacky/agent_config.rb', line 444

def api_key=(value)
  return unless resolve_current_model_entry
  if @virtual_model_overlay
    @virtual_model_overlay["api_key"] = value
  else
    resolve_current_model_entry["api_key"] = value
  end
end

#apply_virtual_model_overlay!(overlay) ⇒ void

This method returns an undefined value.

Apply a virtual model overlay for this session (and only this session). The overlay fields are merged on top of the current model entry when #current_model is called, without ever mutating the shared @models array or its hashes.

Used by Agent#fork_subagent when routing a subagent through a virtual lite model (Haiku for Claude family, Flash for DeepSeek, …). Apply on the forked config only — the parent config is untouched.

Parameters:

  • overlay (Hash, nil) —

    fields to overlay; pass nil or {} to clear. Recognized keys: “api_key”, “base_url”, “model”, “anthropic_format”.



727
728
729
730
731
732
733
734
 
# File 'lib/clacky/agent_config.rb', line 727

def apply_virtual_model_overlay!(overlay)
  if overlay.nil? || overlay.empty?
    @virtual_model_overlay = nil
  else
    # Dup so later mutations to the passed-in hash don't leak in.
    @virtual_model_overlay = overlay.dup
  end
end

#base_url ⇒ Object

Get base URL for current model



454
455
456
 
# File 'lib/clacky/agent_config.rb', line 454

def base_url
  current_model&.dig("base_url")
end

#base_url=(value) ⇒ Object

Set base URL for current model (overlay-aware; see #api_key=).



459
460
461
462
463
464
465
466
 
# File 'lib/clacky/agent_config.rb', line 459

def base_url=(value)
  return unless resolve_current_model_entry
  if @virtual_model_overlay
    @virtual_model_overlay["base_url"] = value
  else
    resolve_current_model_entry["base_url"] = value
  end
end

#bedrock? ⇒ Boolean

Check if current model uses Bedrock Converse API (ABSK key prefix or abs- model prefix)

Returns:

  • (Boolean) 


489
490
491
 
# File 'lib/clacky/agent_config.rb', line 489

def bedrock?
  Clacky::MessageFormat::Bedrock.bedrock_api_key?(api_key.to_s, model_name.to_s)
end

#confirm_fallback_ok! ⇒ Object

Called when a successful API response is received. If we were :probing (testing primary after cooling-off), this confirms the primary model is healthy again and resets everything. No-op in :primary_ok or :fallback_active states.



634
635
636
637
638
639
640
 
# File 'lib/clacky/agent_config.rb', line 634

def confirm_fallback_ok!
  return unless @fallback_state == :probing

  @fallback_state = nil
  @fallback_since = nil
  @fallback_model = nil
end

#current_model ⇒ Object

Get current model configuration.

Resolution order:

1. @current_model_id (primary source of truth — stable across list edits)
2. type: default (for config.yml that sets a default explicitly)
3. @current_model_index (back-compat for very old code paths)



673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
 
# File 'lib/clacky/agent_config.rb', line 673

def current_model
  return nil if @models.empty?

  resolved = resolve_current_model_entry
  return nil unless resolved

  # If a virtual overlay is active (e.g. subagent running on lite-model
  # credentials), return a *merged copy* so callers see the overlay fields
  # but the shared @models hash is never mutated.
  if @virtual_model_overlay && !@virtual_model_overlay.empty?
    resolved.merge(@virtual_model_overlay)
  else
    resolved
  end
end

#current_model_supports?(capability) ⇒ Boolean

Query whether the current model supports a given capability.

This is the single entry-point callers (Agent, downgrade pipeline, UI) should use instead of poking Providers directly. Benefits:

- Always reflects the current model — switching with `/model` takes
  effect immediately, no caching, no stale warnings.
- Handles the "custom base_url / unknown provider" case with a
  conservative default (assume supported), so self-hosted or new
  providers don't get accidentally downgraded.

Parameters:

  • capability (String, Symbol) —

    capability name (e.g. :vision)

Returns:

  • (Boolean) —

    true if supported (or unknown); false only when the preset explicitly declares the capability as unsupported.



754
755
756
757
758
759
760
761
762
763
764
765
 
# File 'lib/clacky/agent_config.rb', line 754

def current_model_supports?(capability)
  m = current_model
  # No model configured yet → nothing to judge; assume supported so we
  # don't preemptively downgrade before a model is even picked.
  return true unless m && m["base_url"]

  provider_id = Clacky::Providers.find_by_base_url(m["base_url"])
  # Custom / self-hosted base_url not in our preset list → be conservative.
  return true unless provider_id

  Clacky::Providers.supports?(provider_id, capability, model_name: m["model"])
end

#deep_copy ⇒ Object

Create a per-session copy of this config.

Plan B (shared models): we deliberately share the SAME @models array reference with all sessions (no deep clone). This is the key design decision that keeps session and global views in sync:

- User adds a model in Settings → every live session sees it instantly.
- User edits api_key/base_url → every live session's next API call
  picks up the new credentials (via current_model lookup).
- Model ids are stable across edits, so each session's
  @current_model_id continues to resolve correctly.

Per-session state that MUST stay isolated (permission_mode, @current_model_id, @current_model_index, fallback state) are scalar copies via ‘dup` and don’t leak between sessions.

Before Plan B, sessions held deep-copied @models — which silently diverged from the global list any time the user added/edited a model in Settings, producing bugs like “Failed to switch model” for newly added models on Windows and Linux. See http_server.rb#api_switch_session_model and http_server.rb#api_save_config for the companion logic.



314
315
316
317
318
319
320
321
322
323
324
325
326
 
# File 'lib/clacky/agent_config.rb', line 314

def deep_copy
  # dup gives us a new AgentConfig with independent scalar ivars but
  # the same @models reference — exactly what we want.
  copy = dup
  # But @virtual_model_overlay must be independent: a forked subagent
  # setting/clearing its own overlay must NOT leak into the parent.
  # (dup copies the ivar reference; an unset overlay is nil which is
  # already independent, but an active overlay must be cloned.)
  if @virtual_model_overlay
    copy.instance_variable_set(:@virtual_model_overlay, @virtual_model_overlay.dup)
  end
  copy
end

#default_model ⇒ Object

Get the default model (type: default) Falls back to current_model for backward compatibility



513
514
515
 
# File 'lib/clacky/agent_config.rb', line 513

def default_model
  find_model_by_type("default") || current_model
end

#effective_model_name ⇒ Object

The effective model name to use for API calls.

  • :primary_ok / nil → configured model_name (primary)

  • :fallback_active → fallback model

  • :probing → configured model_name (trying primary silently)



657
658
659
660
661
662
663
664
665
 
# File 'lib/clacky/agent_config.rb', line 657

def effective_model_name
  case @fallback_state
  when :fallback_active
    @fallback_model || model_name
  else
    # :primary_ok (nil) and :probing both use the primary model
    model_name
  end
end

#fallback_active? ⇒ Boolean

Returns true when a fallback model is currently being used (:fallback_active or :probing states).

Returns:

  • (Boolean) 


644
645
646
 
# File 'lib/clacky/agent_config.rb', line 644

def fallback_active?
  @fallback_state == :fallback_active || @fallback_state == :probing
end

#fallback_model_for(model_name) ⇒ String?

Look up the fallback model name for the given model name. Uses the provider preset’s fallback_models table. Returns nil if no fallback is configured for this model.

Parameters:

  • model_name (String) —

    the primary model name (e.g. “abs-claude-sonnet-4-6”)

Returns:

  • (String, nil) 


597
598
599
600
601
602
603
604
605
606
607
608
 
# File 'lib/clacky/agent_config.rb', line 597

def fallback_model_for(model_name)
  m = current_model
  return nil unless m

  provider_id = Clacky::Providers.resolve_provider(
    base_url: m["base_url"],
    api_key:  m["api_key"]
  )
  return nil unless provider_id

  Clacky::Providers.fallback_model(provider_id, model_name)
end

#find_model_by_type(type) ⇒ Object

Find model by type (default or lite) Returns the model hash or nil if not found



507
508
509
 
# File 'lib/clacky/agent_config.rb', line 507

def find_model_by_type(type)
  @models.find { |m| m["type"] == type }
end

#get_model(index) ⇒ Object

Get model by index



359
360
361
 
# File 'lib/clacky/agent_config.rb', line 359

def get_model(index)
  @models[index]
end

#lite_model ⇒ Object

Explicit lite model entry (type: “lite”) — only present when the user configured ‘CLACKY_LITE_*` environment variables. Returns nil otherwise.

This is the “user override” path. The preferred way for subagents to obtain a lite model is ‘#lite_model_config_for_current`, which falls back to this method when an explicit lite exists.



523
524
525
 
# File 'lib/clacky/agent_config.rb', line 523

def lite_model
  find_model_by_type("lite")
end

#lite_model_config_for_current ⇒ Hash?

Return a complete lite model config hash for the currently-active primary model, or nil if none is available.

Resolution order:

1. Explicit user-configured lite (type: "lite", from CLACKY_LITE_*
   env vars). Wins over provider presets so power users retain full
   control.
2. Provider preset: look up the current model's provider, consult its
   per-family `lite_models` table (e.g. openclacky: Claude → Haiku,
   DeepSeek V4-pro → DeepSeek V4-flash). If matched, return a virtual
   hash that reuses the current model's api_key / base_url — only
   the model name (and anthropic_format, if provider-specific) differ.
3. nil — either the provider has no lite mapping for this primary
   (e.g. the current model is already lite-class like Haiku), or the
   provider is unknown. Callers should treat this as "no lite
   available; use the primary as-is".

The returned hash is not added to @models. It’s consumed directly by ‘Agent#fork_subagent(model: “lite”)`, which applies the fields to the forked config. This means:

- Switching the primary model automatically changes which lite is
  used, with zero additional bookkeeping.
- @models stays a clean list of user-facing models (no phantom
  auto-injected entries cluttering the model picker in the UI).

Returns:

  • (Hash, nil) —

    a hash with keys api_key, base_url, model, anthropic_format, plus an “id” of the form “lite:<primary_id>” for logging/debugging; nil if no lite is resolvable.



555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
 
# File 'lib/clacky/agent_config.rb', line 555

def lite_model_config_for_current
  # 1) Explicit user-configured lite wins
  explicit = find_model_by_type("lite")
  return explicit if explicit

  # 2) Provider preset derivation
  primary = current_model
  return nil unless primary && primary["base_url"] && primary["model"]

  # Use resolve_provider (base_url first, then clacky-* api_key fallback
  # for local-debug / self-hosted proxies).
  provider_id = Clacky::Providers.resolve_provider(
    base_url: primary["base_url"],
    api_key:  primary["api_key"]
  )
  return nil unless provider_id

  lite_name = Clacky::Providers.lite_model(provider_id, primary["model"])
  return nil unless lite_name

  # If the current primary IS already a lite-class model, skip.
  return nil if lite_name == primary["model"]

  {
    "id"               => "lite:#{primary["id"]}",
    "type"             => "lite",
    "api_key"          => primary["api_key"],
    "base_url"         => primary["base_url"],
    "model"            => lite_name,
    "anthropic_format" => primary["anthropic_format"] || false,
    "virtual"          => true  # marker: not a real @models entry
  }
end

#maybe_start_probing ⇒ Object

Called at the start of every call_llm. If cooling-off has expired, transition from :fallback_active → :probing so the next request will silently test the primary model. No-op in any other state.



623
624
625
626
627
628
 
# File 'lib/clacky/agent_config.rb', line 623

def maybe_start_probing
  return unless @fallback_state == :fallback_active
  return unless @fallback_since && (Time.now - @fallback_since) >= FALLBACK_COOLING_OFF_SECONDS

  @fallback_state = :probing
end

#model_name ⇒ Object

Get model name for current model



469
470
471
 
# File 'lib/clacky/agent_config.rb', line 469

def model_name
  current_model&.dig("model")
end

#model_name=(value) ⇒ Object

Set model name for current model (overlay-aware; see #api_key=).



474
475
476
477
478
479
480
481
 
# File 'lib/clacky/agent_config.rb', line 474

def model_name=(value)
  return unless resolve_current_model_entry
  if @virtual_model_overlay
    @virtual_model_overlay["model"] = value
  else
    resolve_current_model_entry["model"] = value
  end
end

#model_names ⇒ Object

List all model names



432
433
434
 
# File 'lib/clacky/agent_config.rb', line 432

def model_names
  @models.map { |m| m["model"] }
end

#models_configured? ⇒ Boolean

Check if any model is configured

Returns:

  • (Boolean) 


350
351
352
 
# File 'lib/clacky/agent_config.rb', line 350

def models_configured?
  !@models.empty? && !current_model.nil?
end

#probing? ⇒ Boolean

Returns true only when we are silently probing the primary model.

Returns:

  • (Boolean) 


649
650
651
 
# File 'lib/clacky/agent_config.rb', line 649

def probing?
  @fallback_state == :probing
end

#remove_model(index) ⇒ Object

Remove a model by index Returns true if removed, false if index out of range or it’s the last model



794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
 
# File 'lib/clacky/agent_config.rb', line 794

def remove_model(index)
  # Don't allow removing the last model
  return false if @models.length <= 1
  return false if index < 0 || index >= @models.length

  removed = @models.delete_at(index)

  # Adjust current_model_index if necessary
  if @current_model_index >= @models.length
    @current_model_index = @models.length - 1
  end

  # If the removed model was the current one, clear @current_model_id.
  # current_model will then fall back to type: default / current_model_index.
  if removed && @current_model_id == removed["id"]
    @current_model_id = nil
  end

  true
end

#save(config_file = CONFIG_FILE) ⇒ Object 



328
329
330
331
332
333
 
# File 'lib/clacky/agent_config.rb', line 328

def save(config_file = CONFIG_FILE)
  config_dir = File.dirname(config_file)
  FileUtils.mkdir_p(config_dir)
  File.write(config_file, to_yaml)
  FileUtils.chmod(0o600, config_file)
end

#set_default_model_by_id(id) ⇒ Boolean

Set the global default model marker (‘type: “default”`).

This is separate from ‘switch_model_by_id`:

- `switch_model_by_id` only changes this session's current model.
- `set_default_model_by_id` mutates the shared `@models` array by
  moving the `type: "default"` marker to the given model.

Use cases:

- CLI (single-session): when the user picks a model, we both switch
  this session AND update the global default so future CLI launches
  use the same model. Caller must `save` to persist.
- Web UI Settings save flow: also uses this (via payload).

Do NOT call from per-session model switching in multi-session contexts (Web UI session-level switch), since it would leak into other sessions and change what new sessions start with.

Only one model may carry ‘type: “default”` at a time — this method clears the marker on any other model that had it.

Note: if the target model currently has ‘type: “lite”`, this method will overwrite it with `“default”`. That matches the existing single-slot `type` field semantics in the codebase.

Parameters:

  • id (String) —

    the model’s runtime id

Returns:

  • (Boolean) —

    true if marker was moved, false if id not found



414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
 
# File 'lib/clacky/agent_config.rb', line 414

def set_default_model_by_id(id)
  return false if id.nil? || id.to_s.empty?

  target = @models.find { |m| m["id"] == id }
  return false if target.nil?

  # Clear existing default marker(s) — there should only be one, but
  # be defensive in case of corrupted config.
  @models.each do |m|
    next if m["id"] == id
    m.delete("type") if m["type"] == "default"
  end

  target["type"] = "default"
  true
end

#set_model_type(index, type) ⇒ Object

Set a model’s type (default or lite) Ensures only one model has each type Returns true if successful

Parameters:

  • index (Integer) —

    the model index

  • type (String, nil) —

    “default”, “lite”, or nil to remove type



772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
 
# File 'lib/clacky/agent_config.rb', line 772

def set_model_type(index, type)
  return false if index < 0 || index >= @models.length
  return false unless ["default", "lite", nil].include?(type)

  if type
    # Remove type from any other model that has it
    @models.each do |m|
      m.delete("type") if m["type"] == type
    end
    
    # Set type on target model
    @models[index]["type"] = type
  else
    # Remove type from target model
    @models[index].delete("type")
  end

  true
end

#switch_model_by_id(id) ⇒ Boolean

Switch the current session to a specific model, identified by its stable runtime id.

This is a per-session operation:

- Updates this AgentConfig's `@current_model_id` (primary truth)
- Updates `@current_model_index` for back-compat observers
- Does NOT mutate the shared `@models` array's `type: "default"`
  marker. The "default model" is a global setting (initial model
  for new sessions) and is only changed via the Settings UI
  "save config" flow (`api_save_config`).

Parameters:

  • id (String) —

    the model’s runtime id (see parse_models)

Returns:

  • (Boolean) —

    true if switched, false if id not found



376
377
378
379
380
381
382
383
384
385
386
 
# File 'lib/clacky/agent_config.rb', line 376

def switch_model_by_id(id)
  return false if id.nil? || id.to_s.empty?

  index = @models.find_index { |m| m["id"] == id }
  return false if index.nil?

  @current_model_id = id
  @current_model_index = index

  true
end

#to_yaml ⇒ Object 



342
343
344
345
346
347
 
# File 'lib/clacky/agent_config.rb', line 342

def to_yaml
  persistable = @models.reject { |m| m["auto_injected"] }.map do |m|
    m.reject { |k, _| RUNTIME_ONLY_FIELDS.include?(k) }
  end
  YAML.dump(persistable)
end

#virtual_model_overlay ⇒ Hash?

Returns the active overlay (read-only view; dup before mutating).

Returns:

  • (Hash, nil) —

    the active overlay (read-only view; dup before mutating)



737
738
739
 
# File 'lib/clacky/agent_config.rb', line 737

def virtual_model_overlay
  @virtual_model_overlay
end