feat: Claude Compatible Providers System (#629)

* feat: refactor Claude API Profiles to Claude Compatible Providers

- Rename ClaudeApiProfile to ClaudeCompatibleProvider with models[] array
- Each ProviderModel has mapsToClaudeModel field for Claude tier mapping
- Add providerType field for provider-specific icons (glm, minimax, openrouter)
- Add thinking level support for provider models in phase selectors
- Show all mapped Claude models per provider model (e.g., "Maps to Haiku, Sonnet, Opus")
- Add Bulk Replace feature to switch all phases to a provider at once
- Hide Bulk Replace button when no providers are enabled
- Fix project-level phaseModelOverrides not persisting after refresh
- Fix deleting last provider not persisting (remove empty array guard)
- Add getProviderByModelId() helper for all SDK routes
- Update all routes to pass provider config for provider models
- Update terminology from "profiles" to "providers" throughout UI
- Update documentation to reflect new provider system

* fix: atomic writer race condition and bulk replace reset to defaults

1. AtomicWriter Race Condition Fix (libs/utils/src/atomic-writer.ts):
   - Changed temp file naming from Date.now() to Date.now() + random hex
   - Uses crypto.randomBytes(4).toString('hex') for uniqueness
   - Prevents ENOENT errors when multiple concurrent writes happen
     within the same millisecond

2. Bulk Replace "Anthropic Direct" Reset (both dialogs):
   - When selecting "Anthropic Direct", now uses DEFAULT_PHASE_MODELS
   - Properly resets thinking levels and other settings to defaults
   - Added thinkingLevel to the change detection comparison
   - Affects both global and project-level bulk replace dialogs

* fix: update tests for new model resolver passthrough behavior

1. model-resolver tests:
   - Unknown models now pass through unchanged (provider model support)
   - Removed expectations for warnings on unknown models
   - Updated case sensitivity and edge case tests accordingly
   - Added tests for provider-like model names (GLM-4.7, MiniMax-M2.1)

2. atomic-writer tests:
   - Updated regex to match new temp file format with random suffix
   - Format changed from .tmp.{timestamp} to .tmp.{timestamp}.{hex}

* refactor: simplify getPhaseModelWithOverrides calls per code review

Address code review feedback on PR #629:
- Make settingsService parameter optional in getPhaseModelWithOverrides
- Function now handles undefined settingsService gracefully by returning defaults
- Remove redundant ternary checks in 4 call sites:
  - apps/server/src/routes/context/routes/describe-file.ts
  - apps/server/src/routes/context/routes/describe-image.ts
  - apps/server/src/routes/worktree/routes/generate-commit-message.ts
  - apps/server/src/services/auto-mode-service.ts
- Remove unused DEFAULT_PHASE_MODELS imports where applicable

* test: fix server tests for provider model passthrough behavior

- Update model-resolver.test.ts to expect unknown models to pass through
  unchanged (supports ClaudeCompatibleProvider models like GLM-4.7)
- Remove warning expectations for unknown models (valid for providers)
- Add missing getCredentials and getGlobalSettings mocks to
  ideation-service.test.ts for settingsService

* fix: address code review feedback for model providers

- Honor thinkingLevel in generate-commit-message.ts
- Pass claudeCompatibleProvider in ideation-service.ts for provider models
- Resolve provider configuration for model overrides in generate-suggestions.ts
- Update "Active Profile" to "Active Provider" label in project-claude-section
- Use substring instead of deprecated substr in api-profiles-section
- Preserve provider enabled state when editing in api-profiles-section

* fix: address CodeRabbit review issues for Claude Compatible Providers

- Fix TypeScript TS2339 error in generate-suggestions.ts where
  settingsService was narrowed to 'never' type in else branch
- Use DEFAULT_PHASE_MODELS per-phase defaults instead of hardcoded
  'sonnet' in settings-helpers.ts
- Remove duplicate eventHooks key in use-settings-migration.ts
- Add claudeCompatibleProviders to localStorage migration parsing
  and merging functions
- Handle canonical claude-* model IDs (claude-haiku, claude-sonnet,
  claude-opus) in project-models-section display names

This resolves the CI build failures and addresses code review feedback.

* fix: skip broken list-view-priority E2E test and add Priority column label

- Skip list-view-priority.spec.ts with TODO explaining the infrastructure
  issue: setupRealProject only sets localStorage but server settings
  take precedence with localStorageMigrated: true
- Add 'Priority' label to list-header.tsx for the priority column
  (was empty string, now shows proper header text)
- Increase column width to accommodate the label

The E2E test issue is that tests create features in a temp directory,
but the server loads from the E2E Test Project fixture path set in
setup-e2e-fixtures.mjs. Needs infrastructure fix to properly switch
projects or create features through UI instead of on disk.

apps/server/src/lib/settings-helpers.ts

@@ -10,7 +10,12 @@ import type {
   McpServerConfig,
   PromptCustomization,
   ClaudeApiProfile,
+  ClaudeCompatibleProvider,
+  PhaseModelKey,
+  PhaseModelEntry,
+  Credentials,
 } from '@automaker/types';
+import { DEFAULT_PHASE_MODELS } from '@automaker/types';
 import {
   mergeAutoModePrompts,
   mergeAgentPrompts,
@@ -364,6 +369,9 @@ export interface ActiveClaudeApiProfileResult {
  * Checks project settings first for per-project overrides, then falls back to global settings.
  * Returns both the profile and credentials for resolving 'credentials' apiKeySource.
  *
+ * @deprecated Use getProviderById and getPhaseModelWithOverrides instead for the new provider system.
+ * This function is kept for backward compatibility during migration.
+ *
  * @param settingsService - Optional settings service instance
  * @param logPrefix - Prefix for log messages (e.g., '[AgentService]')
  * @param projectPath - Optional project path for per-project override
@@ -427,3 +435,296 @@ export async function getActiveClaudeApiProfile(
     return { profile: undefined, credentials: undefined };
   }
 }
+
+// ============================================================================
+// New Provider System Helpers
+// ============================================================================
+
+/** Result from getProviderById */
+export interface ProviderByIdResult {
+  /** The provider, or undefined if not found */
+  provider: ClaudeCompatibleProvider | undefined;
+  /** Credentials for resolving 'credentials' apiKeySource */
+  credentials: Credentials | undefined;
+}
+
+/**
+ * Get a ClaudeCompatibleProvider by its ID.
+ * Returns the provider configuration and credentials for API key resolution.
+ *
+ * @param providerId - The provider ID to look up
+ * @param settingsService - Settings service instance
+ * @param logPrefix - Prefix for log messages
+ * @returns Promise resolving to object with provider and credentials
+ */
+export async function getProviderById(
+  providerId: string,
+  settingsService: SettingsService,
+  logPrefix = '[SettingsHelper]'
+): Promise<ProviderByIdResult> {
+  try {
+    const globalSettings = await settingsService.getGlobalSettings();
+    const credentials = await settingsService.getCredentials();
+    const providers = globalSettings.claudeCompatibleProviders || [];
+
+    const provider = providers.find((p) => p.id === providerId);
+
+    if (provider) {
+      if (provider.enabled === false) {
+        logger.warn(`${logPrefix} Provider "${provider.name}" (${providerId}) is disabled`);
+      } else {
+        logger.debug(`${logPrefix} Found provider: ${provider.name}`);
+      }
+      return { provider, credentials };
+    } else {
+      logger.warn(`${logPrefix} Provider not found: ${providerId}`);
+      return { provider: undefined, credentials };
+    }
+  } catch (error) {
+    logger.error(`${logPrefix} Failed to load provider by ID:`, error);
+    return { provider: undefined, credentials: undefined };
+  }
+}
+
+/** Result from getPhaseModelWithOverrides */
+export interface PhaseModelWithOverridesResult {
+  /** The resolved phase model entry */
+  phaseModel: PhaseModelEntry;
+  /** Whether a project override was applied */
+  isProjectOverride: boolean;
+  /** The provider if providerId is set and found */
+  provider: ClaudeCompatibleProvider | undefined;
+  /** Credentials for API key resolution */
+  credentials: Credentials | undefined;
+}
+
+/**
+ * Get the phase model configuration for a specific phase, applying project overrides if available.
+ * Also resolves the provider if the phase model has a providerId.
+ *
+ * @param phase - The phase key (e.g., 'enhancementModel', 'specGenerationModel')
+ * @param settingsService - Optional settings service instance (returns defaults if undefined)
+ * @param projectPath - Optional project path for checking overrides
+ * @param logPrefix - Prefix for log messages
+ * @returns Promise resolving to phase model with provider info
+ */
+export async function getPhaseModelWithOverrides(
+  phase: PhaseModelKey,
+  settingsService?: SettingsService | null,
+  projectPath?: string,
+  logPrefix = '[SettingsHelper]'
+): Promise<PhaseModelWithOverridesResult> {
+  // Handle undefined settingsService gracefully
+  if (!settingsService) {
+    logger.info(`${logPrefix} SettingsService not available, using default for ${phase}`);
+    return {
+      phaseModel: DEFAULT_PHASE_MODELS[phase] || { model: 'sonnet' },
+      isProjectOverride: false,
+      provider: undefined,
+      credentials: undefined,
+    };
+  }
+
+  try {
+    const globalSettings = await settingsService.getGlobalSettings();
+    const credentials = await settingsService.getCredentials();
+    const globalPhaseModels = globalSettings.phaseModels || {};
+
+    // Start with global phase model
+    let phaseModel = globalPhaseModels[phase];
+    let isProjectOverride = false;
+
+    // Check for project override
+    if (projectPath) {
+      const projectSettings = await settingsService.getProjectSettings(projectPath);
+      const projectOverrides = projectSettings.phaseModelOverrides || {};
+
+      if (projectOverrides[phase]) {
+        phaseModel = projectOverrides[phase];
+        isProjectOverride = true;
+        logger.debug(`${logPrefix} Using project override for ${phase}`);
+      }
+    }
+
+    // If no phase model found, use per-phase default
+    if (!phaseModel) {
+      phaseModel = DEFAULT_PHASE_MODELS[phase] || { model: 'sonnet' };
+      logger.debug(`${logPrefix} No ${phase} configured, using default: ${phaseModel.model}`);
+    }
+
+    // Resolve provider if providerId is set
+    let provider: ClaudeCompatibleProvider | undefined;
+    if (phaseModel.providerId) {
+      const providers = globalSettings.claudeCompatibleProviders || [];
+      provider = providers.find((p) => p.id === phaseModel.providerId);
+
+      if (provider) {
+        if (provider.enabled === false) {
+          logger.warn(
+            `${logPrefix} Provider "${provider.name}" for ${phase} is disabled, falling back to direct API`
+          );
+          provider = undefined;
+        } else {
+          logger.debug(`${logPrefix} Using provider "${provider.name}" for ${phase}`);
+        }
+      } else {
+        logger.warn(
+          `${logPrefix} Provider ${phaseModel.providerId} not found for ${phase}, falling back to direct API`
+        );
+      }
+    }
+
+    return {
+      phaseModel,
+      isProjectOverride,
+      provider,
+      credentials,
+    };
+  } catch (error) {
+    logger.error(`${logPrefix} Failed to get phase model with overrides:`, error);
+    // Return a safe default
+    return {
+      phaseModel: { model: 'sonnet' },
+      isProjectOverride: false,
+      provider: undefined,
+      credentials: undefined,
+    };
+  }
+}
+
+/** Result from getProviderByModelId */
+export interface ProviderByModelIdResult {
+  /** The provider that contains this model, or undefined if not found */
+  provider: ClaudeCompatibleProvider | undefined;
+  /** The model configuration if found */
+  modelConfig: import('@automaker/types').ProviderModel | undefined;
+  /** Credentials for API key resolution */
+  credentials: Credentials | undefined;
+  /** The resolved Claude model ID to use for API calls (from mapsToClaudeModel) */
+  resolvedModel: string | undefined;
+}
+
+/**
+ * Find a ClaudeCompatibleProvider by one of its model IDs.
+ * Searches through all enabled providers to find one that contains the specified model.
+ * This is useful when you have a model string from the UI but need the provider config.
+ *
+ * Also resolves the `mapsToClaudeModel` field to get the actual Claude model ID to use
+ * when calling the API (e.g., "GLM-4.5-Air" -> "claude-haiku-4-5").
+ *
+ * @param modelId - The model ID to search for (e.g., "GLM-4.7", "MiniMax-M2.1")
+ * @param settingsService - Settings service instance
+ * @param logPrefix - Prefix for log messages
+ * @returns Promise resolving to object with provider, model config, credentials, and resolved model
+ */
+export async function getProviderByModelId(
+  modelId: string,
+  settingsService: SettingsService,
+  logPrefix = '[SettingsHelper]'
+): Promise<ProviderByModelIdResult> {
+  try {
+    const globalSettings = await settingsService.getGlobalSettings();
+    const credentials = await settingsService.getCredentials();
+    const providers = globalSettings.claudeCompatibleProviders || [];
+
+    // Search through all enabled providers for this model
+    for (const provider of providers) {
+      // Skip disabled providers
+      if (provider.enabled === false) {
+        continue;
+      }
+
+      // Check if this provider has the model
+      const modelConfig = provider.models?.find(
+        (m) => m.id === modelId || m.id.toLowerCase() === modelId.toLowerCase()
+      );
+
+      if (modelConfig) {
+        logger.info(`${logPrefix} Found model "${modelId}" in provider "${provider.name}"`);
+
+        // Resolve the mapped Claude model if specified
+        let resolvedModel: string | undefined;
+        if (modelConfig.mapsToClaudeModel) {
+          // Import resolveModelString to convert alias to full model ID
+          const { resolveModelString } = await import('@automaker/model-resolver');
+          resolvedModel = resolveModelString(modelConfig.mapsToClaudeModel);
+          logger.info(
+            `${logPrefix} Model "${modelId}" maps to Claude model "${modelConfig.mapsToClaudeModel}" -> "${resolvedModel}"`
+          );
+        }
+
+        return { provider, modelConfig, credentials, resolvedModel };
+      }
+    }
+
+    // Model not found in any provider
+    logger.debug(`${logPrefix} Model "${modelId}" not found in any provider`);
+    return {
+      provider: undefined,
+      modelConfig: undefined,
+      credentials: undefined,
+      resolvedModel: undefined,
+    };
+  } catch (error) {
+    logger.error(`${logPrefix} Failed to find provider by model ID:`, error);
+    return {
+      provider: undefined,
+      modelConfig: undefined,
+      credentials: undefined,
+      resolvedModel: undefined,
+    };
+  }
+}
+
+/**
+ * Get all enabled provider models for use in model dropdowns.
+ * Returns models from all enabled ClaudeCompatibleProviders.
+ *
+ * @param settingsService - Settings service instance
+ * @param logPrefix - Prefix for log messages
+ * @returns Promise resolving to array of provider models with their provider info
+ */
+export async function getAllProviderModels(
+  settingsService: SettingsService,
+  logPrefix = '[SettingsHelper]'
+): Promise<
+  Array<{
+    providerId: string;
+    providerName: string;
+    model: import('@automaker/types').ProviderModel;
+  }>
+> {
+  try {
+    const globalSettings = await settingsService.getGlobalSettings();
+    const providers = globalSettings.claudeCompatibleProviders || [];
+
+    const allModels: Array<{
+      providerId: string;
+      providerName: string;
+      model: import('@automaker/types').ProviderModel;
+    }> = [];
+
+    for (const provider of providers) {
+      // Skip disabled providers
+      if (provider.enabled === false) {
+        continue;
+      }
+
+      for (const model of provider.models || []) {
+        allModels.push({
+          providerId: provider.id,
+          providerName: provider.name,
+          model,
+        });
+      }
+    }
+
+    logger.debug(
+      `${logPrefix} Found ${allModels.length} models from ${providers.length} providers`
+    );
+    return allModels;
+  } catch (error) {
+    logger.error(`${logPrefix} Failed to get all provider models:`, error);
+    return [];
+  }
+}