diff --git a/components/settings/PluginManagerTab.tsx b/components/settings/PluginManagerTab.tsx
new file mode 100644
index 0000000..c9e911a
--- /dev/null
+++ b/components/settings/PluginManagerTab.tsx
@@ -0,0 +1,838 @@
+import React, { useState, useEffect } from 'react';
+import { 
+  PluginWorkflowProfile, 
+  PluginRoleInstance, 
+  RolePlugin,
+  ConfigField 
+} from '../../types/rolePlugin';
+import { PluginManagerService } from '../../services/pluginManagerService';
+
+interface PluginManagerTabProps {
+  disabled?: boolean;
+}
+
+const PluginManagerTab: React.FC<PluginManagerTabProps> = ({ disabled = false }) => {
+  const [profiles, setProfiles] = useState<PluginWorkflowProfile[]>([]);
+  const [selectedProfile, setSelectedProfile] = useState<PluginWorkflowProfile | null>(null);
+  const [editingProfile, setEditingProfile] = useState<PluginWorkflowProfile | null>(null);
+  const [editingRole, setEditingRole] = useState<PluginRoleInstance | null>(null);
+  const [availablePlugins, setAvailablePlugins] = useState<RolePlugin[]>([]);
+  const [showRoleModal, setShowRoleModal] = useState(false);
+  const [showPluginModal, setShowPluginModal] = useState(false);
+  const [selectedPlugin, setSelectedPlugin] = useState<RolePlugin | null>(null);
+  const [error, setError] = useState<string | null>(null);
+  const [success, setSuccess] = useState<string | null>(null);
+  const [showImportModal, setShowImportModal] = useState(false);
+  const [importData, setImportData] = useState('');
+
+  const service = PluginManagerService.getInstance();
+
+  useEffect(() => {
+    loadData();
+  }, []);
+
+  const loadData = () => {
+    try {
+      const loadedProfiles = service.getAllProfiles();
+      const plugins = service.getAllPlugins();
+      
+      setProfiles(loadedProfiles);
+      setAvailablePlugins(plugins);
+      
+      if (!selectedProfile && loadedProfiles.length > 0) {
+        setSelectedProfile(loadedProfiles[0]);
+      }
+      
+      setError(null);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to load data');
+    }
+  };
+
+  const handleCreateProfile = () => {
+    const newProfile: PluginWorkflowProfile = {
+      id: `plugin-profile-${Date.now()}`,
+      name: 'New Plugin Workflow',
+      description: 'Custom plugin-based workflow',
+      version: '1.0.0',
+      roles: [],
+      executionOrder: [],
+      globalSettings: {
+        maxTotalIterations: 15,
+        timeoutMinutes: 30,
+        allowParallelExecution: false
+      },
+      metadata: {
+        createdAt: new Date().toISOString(),
+        updatedAt: new Date().toISOString(),
+        author: 'User',
+        tags: []
+      }
+    };
+    setEditingProfile(newProfile);
+  };
+
+  const handleEditProfile = (profile: PluginWorkflowProfile) => {
+    setEditingProfile({ ...profile });
+  };
+
+  const handleSaveProfile = () => {
+    if (!editingProfile) return;
+
+    try {
+      if (profiles.some(p => p.id === editingProfile.id && p !== selectedProfile)) {
+        service.addProfile(editingProfile);
+        setSuccess('Profile created successfully');
+      } else {
+        service.updateProfile(editingProfile.id, editingProfile);
+        setSuccess('Profile updated successfully');
+      }
+      
+      loadData();
+      setSelectedProfile(editingProfile);
+      setEditingProfile(null);
+      setError(null);
+      
+      // Clear success message after 3 seconds
+      setTimeout(() => setSuccess(null), 3000);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to save profile');
+    }
+  };
+
+  const handleDeleteProfile = (profileId: string) => {
+    try {
+      service.deleteProfile(profileId);
+      loadData();
+      if (selectedProfile?.id === profileId) {
+        setSelectedProfile(profiles.find(p => p.id !== profileId) || null);
+      }
+      setSuccess('Profile deleted successfully');
+      setTimeout(() => setSuccess(null), 3000);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to delete profile');
+    }
+  };
+
+  const handleAddRole = (plugin: RolePlugin) => {
+    if (!editingProfile) return;
+
+    const schema = plugin.getConfigSchema();
+    const defaultConfig = schema.defaultValues || {};
+    
+    const newRole: PluginRoleInstance = {
+      id: `role-${Date.now()}`,
+      pluginId: plugin.metadata.id,
+      name: plugin.metadata.name,
+      description: plugin.metadata.description,
+      config: defaultConfig,
+      executionSettings: {
+        enabled: true,
+        timeout: 180,
+        maxRetries: 1,
+        maxLoops: plugin.metadata.category === 'reviewer' ? 2 : 1
+      }
+    };
+
+    setEditingRole(newRole);
+    setSelectedPlugin(plugin);
+    setShowRoleModal(true);
+  };
+
+  const handleEditRole = (role: PluginRoleInstance) => {
+    const plugin = availablePlugins.find(p => p.metadata.id === role.pluginId);
+    if (!plugin) return;
+
+    setEditingRole({ ...role });
+    setSelectedPlugin(plugin);
+    setShowRoleModal(true);
+  };
+
+  const handleSaveRole = () => {
+    if (!editingProfile || !editingRole || !selectedPlugin) return;
+
+    try {
+      const validation = selectedPlugin.validateConfig(editingRole.config);
+      if (!validation.isValid) {
+        setError(`Role configuration errors: ${validation.errors?.join(', ')}`);
+        return;
+      }
+
+      const existingIndex = editingProfile.roles.findIndex(r => r.id === editingRole.id);
+      if (existingIndex >= 0) {
+        editingProfile.roles[existingIndex] = editingRole;
+      } else {
+        editingProfile.roles.push(editingRole);
+        editingProfile.executionOrder.push(editingRole.id);
+      }
+
+      setEditingProfile({ ...editingProfile });
+      setShowRoleModal(false);
+      setEditingRole(null);
+      setSelectedPlugin(null);
+      setError(null);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to save role');
+    }
+  };
+
+  const handleRemoveRole = (roleId: string) => {
+    if (!editingProfile) return;
+
+    setEditingProfile({
+      ...editingProfile,
+      roles: editingProfile.roles.filter(r => r.id !== roleId),
+      executionOrder: editingProfile.executionOrder.filter(id => id !== roleId)
+    });
+  };
+
+  const renderConfigField = (field: ConfigField, value: any, onChange: (value: any) => void) => {
+    switch (field.type) {
+      case 'string':
+        return (
+          <input
+            type="text"
+            value={value || ''}
+            onChange={(e) => onChange(e.target.value)}
+            className="w-full px-3 py-2 border border-theme rounded-md bg-theme-elevated text-theme-primary text-sm"
+            disabled={disabled}
+          />
+        );
+
+      case 'textarea':
+        return (
+          <textarea
+            value={value || ''}
+            onChange={(e) => onChange(e.target.value)}
+            rows={3}
+            className="w-full px-3 py-2 border border-theme rounded-md bg-theme-elevated text-theme-primary text-sm"
+            disabled={disabled}
+          />
+        );
+
+      case 'number':
+        return (
+          <input
+            type="number"
+            value={value || ''}
+            onChange={(e) => onChange(parseFloat(e.target.value) || 0)}
+            min={field.validation?.min}
+            max={field.validation?.max}
+            className="w-full px-3 py-2 border border-theme rounded-md bg-theme-elevated text-theme-primary text-sm"
+            disabled={disabled}
+          />
+        );
+
+      case 'boolean':
+        return (
+          <label className="flex items-center">
+            <input
+              type="checkbox"
+              checked={value || false}
+              onChange={(e) => onChange(e.target.checked)}
+              className="mr-2"
+              disabled={disabled}
+            />
+            <span className="text-sm text-theme-secondary">Enable this option</span>
+          </label>
+        );
+
+      case 'select':
+        return (
+          <select
+            value={value || ''}
+            onChange={(e) => onChange(e.target.value)}
+            className="w-full px-3 py-2 border border-theme rounded-md bg-theme-elevated text-theme-primary text-sm"
+            disabled={disabled}
+          >
+            <option value="">Select an option...</option>
+            {field.options?.map((option) => (
+              <option key={option.value} value={option.value}>
+                {option.label}
+              </option>
+            ))}
+          </select>
+        );
+
+      case 'multiselect':
+        return (
+          <div className="space-y-1">
+            {field.options?.map((option) => (
+              <label key={option.value} className="flex items-center">
+                <input
+                  type="checkbox"
+                  checked={(value || []).includes(option.value)}
+                  onChange={(e) => {
+                    const currentValues = value || [];
+                    if (e.target.checked) {
+                      onChange([...currentValues, option.value]);
+                    } else {
+                      onChange(currentValues.filter((v: any) => v !== option.value));
+                    }
+                  }}
+                  className="mr-2"
+                  disabled={disabled}
+                />
+                <span className="text-sm text-theme-primary">{option.label}</span>
+              </label>
+            ))}
+          </div>
+        );
+
+      default:
+        return <div className="text-theme-error">Unsupported field type: {field.type}</div>;
+    }
+  };
+
+  const handleExport = () => {
+    const data = service.exportProfiles();
+    const blob = new Blob([JSON.stringify(data, null, 2)], { type: 'application/json' });
+    const url = URL.createObjectURL(blob);
+    const a = document.createElement('a');
+    a.href = url;
+    a.download = `plugin-workflow-profiles-${new Date().toISOString().split('T')[0]}.json`;
+    document.body.appendChild(a);
+    a.click();
+    document.body.removeChild(a);
+    URL.revokeObjectURL(url);
+  };
+
+  const handleImport = () => {
+    try {
+      const data = JSON.parse(importData);
+      service.importProfiles(data);
+      loadData();
+      setShowImportModal(false);
+      setImportData('');
+      setSuccess('Profiles imported successfully');
+      setTimeout(() => setSuccess(null), 3000);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to import profiles');
+    }
+  };
+
+  const getCategoryIcon = (category: string) => {
+    switch (category) {
+      case 'writer': return '✍️';
+      case 'reviewer': return '🔍';
+      case 'analyzer': return '📊';
+      case 'processor': return '⚙️';
+      default: return '🔧';
+    }
+  };
+
+  if (editingProfile) {
+    return (
+      <div className="space-y-6">
+        <div className="flex items-center justify-between">
+          <h3 className="text-lg font-medium text-theme-primary">
+            {profiles.some(p => p.id === editingProfile.id) ? 'Edit' : 'Create'} Plugin Workflow
+          </h3>
+          <div className="space-x-2">
+            <button
+              onClick={handleSaveProfile}
+              disabled={disabled || editingProfile.roles.length === 0}
+              className="px-4 py-2 btn-theme-primary text-theme-primary-contrast rounded-md disabled:opacity-50"
+            >
+              Save Workflow
+            </button>
+            <button
+              onClick={() => setEditingProfile(null)}
+              disabled={disabled}
+              className="px-4 py-2 btn-theme-secondary rounded-md disabled:opacity-50"
+            >
+              Cancel
+            </button>
+          </div>
+        </div>
+
+        {error && (
+          <div className="bg-theme-error/10 border border-theme-error/30 p-3 rounded-md text-theme-error text-sm">
+            {error}
+          </div>
+        )}
+
+        <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
+          <div className="space-y-4">
+            <div>
+              <label className="block text-sm font-medium text-theme-primary mb-1">Workflow name</label>
+              <input
+                type="text"
+                value={editingProfile.name}
+                onChange={(e) => setEditingProfile({ ...editingProfile, name: e.target.value })}
+                className="w-full px-3 py-2 border border-theme rounded-md bg-theme-elevated text-theme-primary"
+                disabled={disabled}
+              />
+            </div>
+
+            <div>
+              <label className="block text-sm font-medium text-theme-primary mb-1">Description</label>
+              <textarea
+                value={editingProfile.description}
+                onChange={(e) => setEditingProfile({ ...editingProfile, description: e.target.value })}
+                rows={2}
+                className="w-full px-3 py-2 border border-theme rounded-md bg-theme-elevated text-theme-primary"
+                disabled={disabled}
+              />
+            </div>
+
+            <div>
+              <div className="flex items-center justify-between mb-2">
+                <h4 className="font-medium text-theme-primary">Role instances</h4>
+                <button
+                  onClick={() => setShowPluginModal(true)}
+                  disabled={disabled}
+                  className="px-3 py-1 btn-theme-primary text-theme-primary-contrast text-sm rounded disabled:opacity-50"
+                >
+                  Add Role
+                </button>
+              </div>
+
+              <div className="space-y-2">
+                {editingProfile.roles.map((role) => {
+                  const plugin = availablePlugins.find(p => p.metadata.id === role.pluginId);
+                  return (
+                    <div key={role.id} className="border border-theme rounded-md p-3 bg-theme-elevated">
+                      <div className="flex items-center justify-between">
+                        <div>
+                          <span className="font-medium text-theme-primary">
+                            {plugin?.metadata.icon || getCategoryIcon(plugin?.metadata.category || '')} {role.name}
+                          </span>
+                          <span className="text-sm text-theme-secondary ml-2">
+                            ({plugin?.metadata.name})
+                          </span>
+                          <div className="text-xs text-theme-muted">
+                            {role.executionSettings.enabled ? 'Enabled' : 'Disabled'}
+                            {role.executionSettings.maxLoops && ` • Max loops: ${role.executionSettings.maxLoops}`}
+                          </div>
+                        </div>
+                        <div className="flex space-x-1">
+                          <button
+                            onClick={() => handleEditRole(role)}
+                            disabled={disabled}
+                            className="p-1 text-theme-accent hover:text-theme-accent-dark disabled:opacity-50"
+                          >
+                            Edit
+                          </button>
+                          <button
+                            onClick={() => handleRemoveRole(role.id)}
+                            disabled={disabled}
+                            className="p-1 text-theme-error hover:text-theme-error-dark disabled:opacity-50"
+                          >
+                            Remove
+                          </button>
+                        </div>
+                      </div>
+                    </div>
+                  );
+                })}
+
+                {editingProfile.roles.length === 0 && (
+                  <div className="text-center py-6 text-theme-secondary">
+                    No roles added yet. Click "Add Role" to add plugin instances.
+                  </div>
+                )}
+              </div>
+            </div>
+          </div>
+
+          <div className="space-y-4">
+            <div>
+              <h4 className="font-medium text-theme-primary mb-2">Global settings</h4>
+              <div className="space-y-3">
+                <div>
+                  <label className="block text-sm text-theme-secondary mb-1">Max total iterations</label>
+                  <input
+                    type="number"
+                    value={editingProfile.globalSettings.maxTotalIterations || 15}
+                    onChange={(e) => setEditingProfile({
+                      ...editingProfile,
+                      globalSettings: {
+                        ...editingProfile.globalSettings,
+                        maxTotalIterations: parseInt(e.target.value) || 15
+                      }
+                    })}
+                    min="1"
+                    max="50"
+                    className="w-full px-3 py-2 border border-theme rounded-md bg-theme-elevated text-theme-primary text-sm"
+                    disabled={disabled}
+                  />
+                </div>
+
+                <div>
+                  <label className="block text-sm text-theme-secondary mb-1">Timeout (minutes)</label>
+                  <input
+                    type="number"
+                    value={editingProfile.globalSettings.timeoutMinutes || 30}
+                    onChange={(e) => setEditingProfile({
+                      ...editingProfile,
+                      globalSettings: {
+                        ...editingProfile.globalSettings,
+                        timeoutMinutes: parseInt(e.target.value) || 30
+                      }
+                    })}
+                    min="5"
+                    max="120"
+                    className="w-full px-3 py-2 border border-theme rounded-md bg-theme-elevated text-theme-primary text-sm"
+                    disabled={disabled}
+                  />
+                </div>
+              </div>
+            </div>
+
+            <div>
+              <h4 className="font-medium text-theme-primary mb-2">Available plugins</h4>
+              <div className="space-y-2 max-h-64 overflow-y-auto">
+                {availablePlugins.map((plugin) => (
+                  <div key={plugin.metadata.id} className="border border-theme rounded-md p-2 bg-theme-elevated">
+                    <div className="flex items-center justify-between">
+                      <div>
+                        <span className="font-medium text-theme-primary text-sm">
+                          {plugin.metadata.icon || getCategoryIcon(plugin.metadata.category)} {plugin.metadata.name}
+                        </span>
+                        <div className="text-xs text-theme-secondary">{plugin.metadata.description}</div>
+                        <div className="text-xs text-theme-muted">
+                          {plugin.metadata.category} • v{plugin.metadata.version}
+                        </div>
+                      </div>
+                    </div>
+                  </div>
+                ))}
+              </div>
+            </div>
+          </div>
+        </div>
+
+        {/* Plugin Selection Modal */}
+        {showPluginModal && (
+          <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center p-4 z-50">
+            <div className="bg-theme-primary border border-theme rounded-lg p-6 w-full max-w-2xl">
+              <h4 className="text-lg font-medium text-theme-primary mb-4">Select Plugin</h4>
+              <div className="space-y-2 max-h-64 overflow-y-auto">
+                {availablePlugins.map((plugin) => (
+                  <div
+                    key={plugin.metadata.id}
+                    className="border border-theme rounded-md p-3 bg-theme-elevated cursor-pointer hover:border-theme-accent"
+                    onClick={() => {
+                      handleAddRole(plugin);
+                      setShowPluginModal(false);
+                    }}
+                  >
+                    <div className="flex items-center justify-between">
+                      <div>
+                        <span className="font-medium text-theme-primary">
+                          {plugin.metadata.icon || getCategoryIcon(plugin.metadata.category)} {plugin.metadata.name}
+                        </span>
+                        <div className="text-sm text-theme-secondary">{plugin.metadata.description}</div>
+                        <div className="text-xs text-theme-muted">
+                          {plugin.metadata.category} • v{plugin.metadata.version}
+                        </div>
+                      </div>
+                    </div>
+                  </div>
+                ))}
+              </div>
+              <div className="flex justify-end mt-4">
+                <button
+                  onClick={() => setShowPluginModal(false)}
+                  className="px-4 py-2 btn-theme-secondary rounded-md"
+                >
+                  Cancel
+                </button>
+              </div>
+            </div>
+          </div>
+        )}
+
+        {/* Role Configuration Modal */}
+        {showRoleModal && editingRole && selectedPlugin && (
+          <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center p-4 z-50">
+            <div className="bg-theme-primary border border-theme rounded-lg p-6 w-full max-w-2xl max-h-[80vh] overflow-y-auto">
+              <div className="flex items-center justify-between mb-4">
+                <h4 className="text-lg font-medium text-theme-primary">
+                  Configure {selectedPlugin.metadata.name}
+                </h4>
+                <div className="space-x-2">
+                  <button
+                    onClick={handleSaveRole}
+                    className="px-4 py-2 btn-theme-primary text-theme-primary-contrast rounded-md"
+                  >
+                    Save Role
+                  </button>
+                  <button
+                    onClick={() => setShowRoleModal(false)}
+                    className="px-4 py-2 btn-theme-secondary rounded-md"
+                  >
+                    Cancel
+                  </button>
+                </div>
+              </div>
+
+              <div className="space-y-4">
+                <div>
+                  <label className="block text-sm font-medium text-theme-primary mb-1">Role name</label>
+                  <input
+                    type="text"
+                    value={editingRole.name}
+                    onChange={(e) => setEditingRole({ ...editingRole, name: e.target.value })}
+                    className="w-full px-3 py-2 border border-theme rounded-md bg-theme-elevated text-theme-primary"
+                  />
+                </div>
+
+                <div>
+                  <h5 className="font-medium text-theme-primary mb-2">Execution settings</h5>
+                  <div className="space-y-2">
+                    <label className="flex items-center">
+                      <input
+                        type="checkbox"
+                        checked={editingRole.executionSettings.enabled}
+                        onChange={(e) => setEditingRole({
+                          ...editingRole,
+                          executionSettings: {
+                            ...editingRole.executionSettings,
+                            enabled: e.target.checked
+                          }
+                        })}
+                        className="mr-2"
+                      />
+                      <span className="text-sm text-theme-primary">Enabled</span>
+                    </label>
+
+                    {selectedPlugin.metadata.category === 'reviewer' && (
+                      <div>
+                        <label className="block text-sm text-theme-secondary mb-1">Max loops</label>
+                        <input
+                          type="number"
+                          value={editingRole.executionSettings.maxLoops || 2}
+                          onChange={(e) => setEditingRole({
+                            ...editingRole,
+                            executionSettings: {
+                              ...editingRole.executionSettings,
+                              maxLoops: parseInt(e.target.value) || 2
+                            }
+                          })}
+                          min="1"
+                          max="10"
+                          className="w-full px-3 py-2 border border-theme rounded-md bg-theme-elevated text-theme-primary text-sm"
+                        />
+                      </div>
+                    )}
+                  </div>
+                </div>
+
+                <div>
+                  <h5 className="font-medium text-theme-primary mb-2">Plugin configuration</h5>
+                  <div className="space-y-3">
+                    {selectedPlugin.getConfigSchema().fields.map((field) => (
+                      <div key={field.key}>
+                        <label className="block text-sm font-medium text-theme-primary mb-1">
+                          {field.label}
+                          {field.required && <span className="text-theme-error ml-1">*</span>}
+                        </label>
+                        {renderConfigField(
+                          field,
+                          editingRole.config[field.key],
+                          (value) => setEditingRole({
+                            ...editingRole,
+                            config: {
+                              ...editingRole.config,
+                              [field.key]: value
+                            }
+                          })
+                        )}
+                        {field.description && (
+                          <p className="text-xs text-theme-muted mt-1">{field.description}</p>
+                        )}
+                      </div>
+                    ))}
+                  </div>
+                </div>
+              </div>
+            </div>
+          </div>
+        )}
+      </div>
+    );
+  }
+
+  return (
+    <div className="space-y-6">
+      <div className="flex items-center justify-between">
+        <h3 className="text-lg font-medium text-theme-primary">Plugin-based Workflow Manager</h3>
+        <div className="space-x-2">
+          <button
+            onClick={handleCreateProfile}
+            disabled={disabled}
+            className="px-4 py-2 btn-theme-primary text-theme-primary-contrast rounded-md disabled:opacity-50"
+          >
+            Create New Workflow
+          </button>
+          <button
+            onClick={handleExport}
+            disabled={disabled}
+            className="px-4 py-2 btn-theme-secondary rounded-md disabled:opacity-50"
+          >
+            Export
+          </button>
+          <button
+            onClick={() => setShowImportModal(true)}
+            disabled={disabled}
+            className="px-4 py-2 btn-theme-secondary rounded-md disabled:opacity-50"
+          >
+            Import
+          </button>
+        </div>
+      </div>
+
+      {error && (
+        <div className="bg-theme-error/10 border border-theme-error/30 p-3 rounded-md text-theme-error text-sm">
+          {error}
+        </div>
+      )}
+
+      {success && (
+        <div className="bg-theme-success/10 border border-theme-success/30 p-3 rounded-md text-theme-success text-sm">
+          {success}
+        </div>
+      )}
+
+      <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
+        <div>
+          <h4 className="font-medium text-theme-primary mb-3">Workflow Profiles</h4>
+          <div className="space-y-2">
+            {profiles.map((profile) => (
+              <div
+                key={profile.id}
+                className={`p-3 border rounded-md cursor-pointer ${
+                  selectedProfile?.id === profile.id
+                    ? 'border-theme-accent bg-theme-accent/10'
+                    : 'border-theme bg-theme-elevated hover:border-theme-accent/50'
+                }`}
+                onClick={() => setSelectedProfile(profile)}
+              >
+                <div className="flex items-center justify-between">
+                  <div>
+                    <h5 className="font-medium text-theme-primary">{profile.name}</h5>
+                    <p className="text-sm text-theme-secondary">{profile.description}</p>
+                    <p className="text-xs text-theme-muted">{profile.roles.length} roles</p>
+                  </div>
+                  <div className="flex space-x-1">
+                    <button
+                      onClick={(e) => {
+                        e.stopPropagation();
+                        handleEditProfile(profile);
+                      }}
+                      disabled={disabled}
+                      className="p-1 text-theme-accent hover:text-theme-accent-dark disabled:opacity-50"
+                    >
+                      Edit
+                    </button>
+                    <button
+                      onClick={(e) => {
+                        e.stopPropagation();
+                        handleDeleteProfile(profile.id);
+                      }}
+                      disabled={disabled || profiles.length <= 1}
+                      className="p-1 text-theme-error hover:text-theme-error-dark disabled:opacity-50"
+                    >
+                      Delete
+                    </button>
+                  </div>
+                </div>
+              </div>
+            ))}
+          </div>
+        </div>
+
+        <div>
+          {selectedProfile && (
+            <>
+              <h4 className="font-medium text-theme-primary mb-3">Profile Details</h4>
+              <div className="bg-theme-elevated border border-theme rounded-md p-4 space-y-4">
+                <div>
+                  <h5 className="font-medium text-theme-primary">{selectedProfile.name}</h5>
+                  <p className="text-sm text-theme-secondary">{selectedProfile.description}</p>
+                  <p className="text-xs text-theme-muted">Version: {selectedProfile.version}</p>
+                </div>
+
+                <div>
+                  <h6 className="font-medium text-theme-primary mb-2">Plugin Roles ({selectedProfile.roles.length})</h6>
+                  <div className="space-y-2">
+                    {selectedProfile.roles.map((role) => {
+                      const plugin = availablePlugins.find(p => p.metadata.id === role.pluginId);
+                      return (
+                        <div key={role.id} className="text-sm border border-theme rounded p-2">
+                          <div className="font-medium text-theme-primary">
+                            {plugin?.metadata.icon || getCategoryIcon(plugin?.metadata.category || '')} {role.name}
+                          </div>
+                          <div className="text-theme-secondary">{plugin?.metadata.name} v{plugin?.metadata.version}</div>
+                          <div className="text-theme-muted">
+                            {role.executionSettings.enabled ? 'Enabled' : 'Disabled'}
+                            {role.executionSettings.maxLoops && ` • Max loops: ${role.executionSettings.maxLoops}`}
+                          </div>
+                        </div>
+                      );
+                    })}
+                  </div>
+                </div>
+
+                <div>
+                  <h6 className="font-medium text-theme-primary mb-2">Execution order</h6>
+                  <div className="space-y-1">
+                    {selectedProfile.executionOrder.map((roleId, index) => {
+                      const role = selectedProfile.roles.find(r => r.id === roleId);
+                      const plugin = availablePlugins.find(p => p.metadata.id === role?.pluginId);
+                      return (
+                        <div key={roleId} className="flex items-center text-sm">
+                          <span className="w-6 h-6 bg-theme-accent text-theme-primary-contrast rounded-full flex items-center justify-center text-xs mr-2">
+                            {index + 1}
+                          </span>
+                          <span>
+                            {plugin?.metadata.icon || getCategoryIcon(plugin?.metadata.category || '')} {role?.name}
+                          </span>
+                        </div>
+                      );
+                    })}
+                  </div>
+                </div>
+              </div>
+            </>
+          )}
+        </div>
+      </div>
+
+      {/* Import Modal */}
+      {showImportModal && (
+        <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center p-4 z-50">
+          <div className="bg-theme-primary border border-theme rounded-lg p-6 w-full max-w-2xl">
+            <h4 className="text-lg font-medium text-theme-primary mb-4">Import Plugin Profiles</h4>
+            <textarea
+              value={importData}
+              onChange={(e) => setImportData(e.target.value)}
+              placeholder="Paste JSON data here..."
+              rows={10}
+              className="w-full px-3 py-2 border border-theme rounded-md bg-theme-elevated text-theme-primary text-sm"
+            />
+            <div className="flex justify-end space-x-2 mt-4">
+              <button
+                onClick={() => setShowImportModal(false)}
+                className="px-4 py-2 btn-theme-secondary rounded-md"
+              >
+                Cancel
+              </button>
+              <button
+                onClick={handleImport}
+                disabled={!importData.trim()}
+                className="px-4 py-2 btn-theme-primary text-theme-primary-contrast rounded-md disabled:opacity-50"
+              >
+                Import
+              </button>
+            </div>
+          </div>
+        </div>
+      )}
+    </div>
+  );
+};
+
+export default PluginManagerTab;
\ No newline at end of file
diff --git a/pages/SettingsPage.tsx b/pages/SettingsPage.tsx
index 459c673..db85936 100644
--- a/pages/SettingsPage.tsx
+++ b/pages/SettingsPage.tsx
@@ -5,6 +5,7 @@ import AgentSettingsTab from '../components/settings/AgentSettingsTab';
 import DocumentTypeProfilesTab from '../components/settings/DocumentTypeProfilesTab';
 import GlobalStyleGuideTab from '../components/settings/GlobalStyleGuideTab';
 import { LLMProviderTab } from '../components/settings/LLMProviderTab';
+import PluginManagerTab from '../components/settings/PluginManagerTab';
 import { INITIAL_AGENT_SETTINGS } from '../constants';
 import ConfirmModal from '../components/ConfirmModal';
 
@@ -17,7 +18,7 @@ interface SettingsPageProps {
   disabled: boolean; // True if main workflow is processing
 }
 
-type SettingsTab = 'agents' | 'profiles' | 'globalStyle' | 'llmProvider';
+type SettingsTab = 'agents' | 'profiles' | 'globalStyle' | 'llmProvider' | 'pluginManager';
 
 const SettingsPage: React.FC<SettingsPageProps> = ({
   agentSettings,
@@ -242,6 +243,16 @@ const SettingsPage: React.FC<SettingsPageProps> = ({
             >
               Global style guidance
             </button>
+            <button
+              onClick={() => setActiveTab('pluginManager')}
+              className={`whitespace-nowrap pb-4 px-1 border-b-2 font-medium text-sm
+                ${activeTab === 'pluginManager'
+                  ? 'border-theme-accent text-theme-accent'
+                  : 'border-transparent text-theme-secondary hover:text-theme-primary hover:border-theme'
+                }`}
+            >
+              Plugin manager
+            </button>
           </nav>
         </div>
 
@@ -275,6 +286,11 @@ const SettingsPage: React.FC<SettingsPageProps> = ({
                 disabled={disabled}
             />
           )}
+          {activeTab === 'pluginManager' && (
+            <PluginManagerTab
+              disabled={disabled}
+            />
+          )}
         </div>
       </main>
        <footer className="w-full max-w-6xl mt-12 text-center text-xs text-theme-muted">
diff --git a/screenshots/approach-3-main-page.png b/screenshots/approach-3-main-page.png
new file mode 100644
index 0000000..c40f820
Binary files /dev/null and b/screenshots/approach-3-main-page.png differ
diff --git a/screenshots/approach-3-plugin-manager-tab.png b/screenshots/approach-3-plugin-manager-tab.png
new file mode 100644
index 0000000..0a3bd32
Binary files /dev/null and b/screenshots/approach-3-plugin-manager-tab.png differ
diff --git a/screenshots/approach-3-workflow-creation.png b/screenshots/approach-3-workflow-creation.png
new file mode 100644
index 0000000..34876de
Binary files /dev/null and b/screenshots/approach-3-workflow-creation.png differ
diff --git a/services/pluginManagerService.ts b/services/pluginManagerService.ts
new file mode 100644
index 0000000..4ff7ad8
--- /dev/null
+++ b/services/pluginManagerService.ts
@@ -0,0 +1,458 @@
+import {
+  RolePlugin,
+  PluginWorkflowProfile,
+  PluginRoleInstance,
+  ExecutionContext,
+  RoleExecutionResult,
+  DEFAULT_PLUGINS,
+  PLUGIN_WORKFLOW_PROFILES,
+  ValidationResult
+} from '../types/rolePlugin';
+
+const STORAGE_KEY = 'tech-doc-workflow-plugin-profiles';
+const PLUGINS_STORAGE_KEY = 'tech-doc-workflow-plugins';
+const CURRENT_VERSION = '1.0.0';
+
+export class PluginManagerService {
+  private static instance: PluginManagerService;
+  private plugins: Map<string, RolePlugin> = new Map();
+  private profiles: PluginWorkflowProfile[] = [];
+
+  private constructor() {
+    this.initializeDefaultPlugins();
+    this.loadProfiles();
+  }
+
+  static getInstance(): PluginManagerService {
+    if (!PluginManagerService.instance) {
+      PluginManagerService.instance = new PluginManagerService();
+    }
+    return PluginManagerService.instance;
+  }
+
+  private initializeDefaultPlugins(): void {
+    DEFAULT_PLUGINS.forEach(plugin => {
+      this.plugins.set(plugin.metadata.id, plugin);
+    });
+  }
+
+  private loadProfiles(): void {
+    try {
+      const stored = localStorage.getItem(STORAGE_KEY);
+      if (stored) {
+        const data = JSON.parse(stored);
+        this.profiles = data.profiles || [];
+      } else {
+        this.profiles = [...PLUGIN_WORKFLOW_PROFILES];
+        this.saveProfiles();
+      }
+    } catch (error) {
+      console.warn('Failed to load plugin profiles from storage:', error);
+      this.profiles = [...PLUGIN_WORKFLOW_PROFILES];
+    }
+  }
+
+  private saveProfiles(): void {
+    try {
+      const data = {
+        version: CURRENT_VERSION,
+        profiles: this.profiles
+      };
+      localStorage.setItem(STORAGE_KEY, JSON.stringify(data, null, 2));
+    } catch (error) {
+      console.error('Failed to save plugin profiles to storage:', error);
+      throw new Error('Failed to save plugin profiles');
+    }
+  }
+
+  // Plugin management
+  registerPlugin(plugin: RolePlugin): void {
+    if (this.plugins.has(plugin.metadata.id)) {
+      throw new Error(`Plugin with ID '${plugin.metadata.id}' already exists`);
+    }
+
+    this.validatePlugin(plugin);
+    this.plugins.set(plugin.metadata.id, plugin);
+    
+    // Initialize plugin if it has an initialize method
+    if (plugin.initialize) {
+      plugin.initialize();
+    }
+  }
+
+  unregisterPlugin(pluginId: string): void {
+    const plugin = this.plugins.get(pluginId);
+    if (!plugin) {
+      throw new Error(`Plugin with ID '${pluginId}' not found`);
+    }
+
+    // Check if plugin is in use
+    const isInUse = this.profiles.some(profile => 
+      profile.roles.some(role => role.pluginId === pluginId)
+    );
+    
+    if (isInUse) {
+      throw new Error(`Cannot unregister plugin '${pluginId}' as it is currently in use`);
+    }
+
+    // Cleanup plugin if it has a destroy method
+    if (plugin.destroy) {
+      plugin.destroy();
+    }
+
+    this.plugins.delete(pluginId);
+  }
+
+  getPlugin(pluginId: string): RolePlugin | undefined {
+    return this.plugins.get(pluginId);
+  }
+
+  getAllPlugins(): RolePlugin[] {
+    return Array.from(this.plugins.values());
+  }
+
+  getPluginsByCategory(category: string): RolePlugin[] {
+    return Array.from(this.plugins.values()).filter(plugin => 
+      plugin.metadata.category === category
+    );
+  }
+
+  private validatePlugin(plugin: RolePlugin): void {
+    if (!plugin.metadata.id || typeof plugin.metadata.id !== 'string') {
+      throw new Error('Plugin must have a valid ID');
+    }
+    if (!plugin.metadata.name || typeof plugin.metadata.name !== 'string') {
+      throw new Error('Plugin must have a valid name');
+    }
+    if (!plugin.metadata.version || typeof plugin.metadata.version !== 'string') {
+      throw new Error('Plugin must have a valid version');
+    }
+    if (typeof plugin.execute !== 'function') {
+      throw new Error('Plugin must implement execute method');
+    }
+    if (typeof plugin.getConfigSchema !== 'function') {
+      throw new Error('Plugin must implement getConfigSchema method');
+    }
+    if (typeof plugin.validateConfig !== 'function') {
+      throw new Error('Plugin must implement validateConfig method');
+    }
+  }
+
+  // Profile management
+  getAllProfiles(): PluginWorkflowProfile[] {
+    return [...this.profiles];
+  }
+
+  getProfileById(id: string): PluginWorkflowProfile | undefined {
+    return this.profiles.find(profile => profile.id === id);
+  }
+
+  addProfile(profile: PluginWorkflowProfile): void {
+    this.validateProfile(profile);
+    
+    if (this.profiles.some(p => p.id === profile.id)) {
+      throw new Error(`Profile with ID '${profile.id}' already exists`);
+    }
+
+    profile.metadata.updatedAt = new Date().toISOString();
+    this.profiles.push(profile);
+    this.saveProfiles();
+  }
+
+  updateProfile(id: string, updatedProfile: PluginWorkflowProfile): void {
+    this.validateProfile(updatedProfile);
+    
+    const index = this.profiles.findIndex(p => p.id === id);
+    if (index === -1) {
+      throw new Error(`Profile with ID '${id}' not found`);
+    }
+
+    if (updatedProfile.id !== id && this.profiles.some(p => p.id === updatedProfile.id)) {
+      throw new Error(`Profile with ID '${updatedProfile.id}' already exists`);
+    }
+
+    updatedProfile.metadata.updatedAt = new Date().toISOString();
+    this.profiles[index] = updatedProfile;
+    this.saveProfiles();
+  }
+
+  deleteProfile(id: string): void {
+    const index = this.profiles.findIndex(p => p.id === id);
+    if (index === -1) {
+      throw new Error(`Profile with ID '${id}' not found`);
+    }
+
+    if (this.profiles.length <= 1) {
+      throw new Error('Cannot delete the last workflow profile');
+    }
+
+    this.profiles.splice(index, 1);
+    this.saveProfiles();
+  }
+
+  duplicateProfile(id: string): PluginWorkflowProfile {
+    const original = this.getProfileById(id);
+    if (!original) {
+      throw new Error(`Profile with ID '${id}' not found`);
+    }
+
+    const duplicate: PluginWorkflowProfile = {
+      ...original,
+      id: `${original.id}-copy-${Date.now()}`,
+      name: `${original.name} (Copy)`,
+      metadata: {
+        ...original.metadata,
+        createdAt: new Date().toISOString(),
+        updatedAt: new Date().toISOString()
+      }
+    };
+
+    this.addProfile(duplicate);
+    return duplicate;
+  }
+
+  private validateProfile(profile: PluginWorkflowProfile): void {
+    if (!profile.id || typeof profile.id !== 'string') {
+      throw new Error('Profile must have a valid ID');
+    }
+    if (!profile.name || typeof profile.name !== 'string') {
+      throw new Error('Profile must have a valid name');
+    }
+    if (!profile.roles || !Array.isArray(profile.roles) || profile.roles.length === 0) {
+      throw new Error('Profile must have at least one role');
+    }
+
+    // Validate roles
+    profile.roles.forEach((role, index) => {
+      if (!role.id || typeof role.id !== 'string') {
+        throw new Error(`Role at index ${index} must have a valid ID`);
+      }
+      if (!role.pluginId || typeof role.pluginId !== 'string') {
+        throw new Error(`Role '${role.id}' must have a valid plugin ID`);
+      }
+      
+      const plugin = this.getPlugin(role.pluginId);
+      if (!plugin) {
+        throw new Error(`Role '${role.id}' references unknown plugin: ${role.pluginId}`);
+      }
+
+      // Validate role configuration
+      const validation = plugin.validateConfig(role.config);
+      if (!validation.isValid) {
+        throw new Error(`Role '${role.id}' configuration errors: ${validation.errors?.join(', ')}`);
+      }
+    });
+
+    // Validate execution order
+    if (!profile.executionOrder || !Array.isArray(profile.executionOrder)) {
+      throw new Error('Profile must have execution order defined');
+    }
+
+    profile.executionOrder.forEach(roleId => {
+      if (!profile.roles.some(role => role.id === roleId)) {
+        throw new Error(`Execution order references non-existent role: ${roleId}`);
+      }
+    });
+
+    // Ensure at least one writer role exists
+    const hasWriter = profile.roles.some(role => {
+      const plugin = this.getPlugin(role.pluginId);
+      return plugin?.metadata.category === 'writer';
+    });
+    if (!hasWriter) {
+      throw new Error('Profile must have at least one writer role');
+    }
+  }
+
+  // Workflow execution
+  async executeWorkflow(
+    profileId: string, 
+    document: string, 
+    sourceContent?: string, 
+    supportingContent?: string
+  ): Promise<{ success: boolean; finalDocument?: string; error?: string; logs: string[] }> {
+    const profile = this.getProfileById(profileId);
+    if (!profile) {
+      return { success: false, error: `Profile '${profileId}' not found`, logs: [] };
+    }
+
+    const logs: string[] = [];
+    let currentDocument = document;
+    let totalIterations = 0;
+    const maxIterations = profile.globalSettings.maxTotalIterations || 15;
+
+    try {
+      logs.push(`Starting workflow: ${profile.name}`);
+
+      for (const roleId of profile.executionOrder) {
+        const role = profile.roles.find(r => r.id === roleId);
+        if (!role || !role.executionSettings.enabled) {
+          logs.push(`Skipping disabled role: ${roleId}`);
+          continue;
+        }
+
+        const plugin = this.getPlugin(role.pluginId);
+        if (!plugin) {
+          const error = `Plugin not found for role '${roleId}': ${role.pluginId}`;
+          logs.push(error);
+          return { success: false, error, logs };
+        }
+
+        logs.push(`Executing role: ${role.name} (${plugin.metadata.name})`);
+
+        let roleIterations = 0;
+        const maxRoleLoops = role.executionSettings.maxLoops || 1;
+
+        while (roleIterations < maxRoleLoops && totalIterations < maxIterations) {
+          const context: ExecutionContext = {
+            roleId: role.id,
+            document: currentDocument,
+            sourceContent,
+            supportingContent,
+            iteration: roleIterations,
+            globalSettings: profile.globalSettings
+          };
+
+          try {
+            // Execute plugin hooks
+            if (plugin.hooks?.onBeforeExecution) {
+              await plugin.hooks.onBeforeExecution(context);
+            }
+
+            const result = await plugin.execute(context, role.config);
+
+            // Execute post-execution hook
+            if (plugin.hooks?.onAfterExecution) {
+              await plugin.hooks.onAfterExecution(context, result);
+            }
+
+            logs.push(`Role result: ${result.type}${result.feedback ? ` - ${result.feedback.substring(0, 100)}...` : ''}`);
+
+            switch (result.type) {
+              case 'continue':
+                if (result.data && typeof result.data === 'string') {
+                  currentDocument = result.data;
+                }
+                logs.push(`Role '${role.name}' completed successfully`);
+                break;
+
+              case 'revise':
+                if (result.data && typeof result.data === 'string') {
+                  currentDocument = result.data;
+                }
+                roleIterations++;
+                totalIterations++;
+                logs.push(`Role '${role.name}' requested revision (iteration ${roleIterations})`);
+                continue;
+
+              case 'skip':
+                logs.push(`Role '${role.name}' skipped`);
+                break;
+
+              case 'error':
+                const error = `Role '${role.name}' failed: ${result.feedback || 'Unknown error'}`;
+                logs.push(error);
+                return { success: false, error, logs };
+
+              default:
+                const unknownError = `Role '${role.name}' returned unknown result type: ${result.type}`;
+                logs.push(unknownError);
+                return { success: false, error: unknownError, logs };
+            }
+
+            break; // Exit role loop on success/skip
+
+          } catch (error) {
+            const errorMsg = `Role '${role.name}' execution failed: ${error instanceof Error ? error.message : 'Unknown error'}`;
+            logs.push(errorMsg);
+
+            // Execute error hook
+            if (plugin.hooks?.onError && error instanceof Error) {
+              await plugin.hooks.onError(context, error);
+            }
+
+            return { success: false, error: errorMsg, logs };
+          }
+        }
+
+        if (roleIterations >= maxRoleLoops) {
+          logs.push(`Role '${role.name}' reached maximum iterations (${maxRoleLoops})`);
+        }
+      }
+
+      if (totalIterations >= maxIterations) {
+        logs.push(`Workflow reached maximum total iterations (${maxIterations})`);
+      }
+
+      logs.push('Workflow completed successfully');
+      return { success: true, finalDocument: currentDocument, logs };
+
+    } catch (error) {
+      const errorMsg = `Workflow failed: ${error instanceof Error ? error.message : 'Unknown error'}`;
+      logs.push(errorMsg);
+      return { success: false, error: errorMsg, logs };
+    }
+  }
+
+  // Plugin development helpers
+  validateRoleConfig(pluginId: string, config: any): ValidationResult {
+    const plugin = this.getPlugin(pluginId);
+    if (!plugin) {
+      return { isValid: false, errors: [`Plugin '${pluginId}' not found`] };
+    }
+
+    return plugin.validateConfig(config);
+  }
+
+  getConfigSchemaForPlugin(pluginId: string) {
+    const plugin = this.getPlugin(pluginId);
+    return plugin?.getConfigSchema();
+  }
+
+  // Import/Export
+  exportProfiles(): { version: string; profiles: PluginWorkflowProfile[] } {
+    return {
+      version: CURRENT_VERSION,
+      profiles: this.profiles
+    };
+  }
+
+  importProfiles(data: { version: string; profiles: PluginWorkflowProfile[] }): void {
+    if (!data.profiles || !Array.isArray(data.profiles)) {
+      throw new Error('Invalid import data format');
+    }
+
+    // Validate all profiles before importing
+    data.profiles.forEach(profile => this.validateProfile(profile));
+
+    this.profiles = data.profiles;
+    this.saveProfiles();
+  }
+
+  resetToDefaults(): void {
+    this.profiles = [...PLUGIN_WORKFLOW_PROFILES];
+    this.saveProfiles();
+  }
+
+  // Plugin discovery and management
+  installPluginFromDefinition(pluginDefinition: any): void {
+    // This would be used to install plugins from external sources
+    // For now, we only support built-in plugins
+    throw new Error('External plugin installation not yet implemented');
+  }
+
+  getPluginDependencies(pluginId: string): string[] {
+    const plugin = this.getPlugin(pluginId);
+    return plugin?.metadata.dependencies || [];
+  }
+
+  checkPluginCompatibility(pluginId: string, targetVersion: string): boolean {
+    const plugin = this.getPlugin(pluginId);
+    if (!plugin) return false;
+
+    const compatibleVersions = plugin.metadata.compatibleVersions;
+    if (!compatibleVersions) return true; // No restrictions
+
+    return compatibleVersions.includes(targetVersion);
+  }
+}
\ No newline at end of file
diff --git a/types/rolePlugin.ts b/types/rolePlugin.ts
new file mode 100644
index 0000000..5622557
--- /dev/null
+++ b/types/rolePlugin.ts
@@ -0,0 +1,459 @@
+// Plugin-style modular role system
+export interface RolePluginMetadata {
+  id: string;
+  name: string;
+  version: string;
+  description: string;
+  author?: string;
+  category: 'writer' | 'reviewer' | 'analyzer' | 'processor' | 'custom';
+  icon?: string;
+  tags?: string[];
+  dependencies?: string[];
+  compatibleVersions?: string[];
+}
+
+export interface RolePluginConfig {
+  [key: string]: any;
+}
+
+export interface RolePluginHooks {
+  onBeforeExecution?: (context: ExecutionContext) => Promise<void> | void;
+  onAfterExecution?: (context: ExecutionContext, result: any) => Promise<void> | void;
+  onError?: (context: ExecutionContext, error: Error) => Promise<void> | void;
+  onValidateConfig?: (config: RolePluginConfig) => ValidationResult;
+}
+
+export interface ExecutionContext {
+  roleId: string;
+  document: string;
+  sourceContent?: string;
+  supportingContent?: string;
+  iteration: number;
+  previousResults?: any[];
+  globalSettings?: Record<string, any>;
+}
+
+export interface ValidationResult {
+  isValid: boolean;
+  errors?: string[];
+  warnings?: string[];
+}
+
+export interface RolePlugin {
+  metadata: RolePluginMetadata;
+  
+  // Core execution method
+  execute(context: ExecutionContext, config: RolePluginConfig): Promise<RoleExecutionResult>;
+  
+  // Configuration schema
+  getConfigSchema(): RolePluginConfigSchema;
+  
+  // Validation
+  validateConfig(config: RolePluginConfig): ValidationResult;
+  
+  // Optional hooks
+  hooks?: RolePluginHooks;
+  
+  // Initialization and cleanup
+  initialize?(globalConfig?: Record<string, any>): Promise<void> | void;
+  destroy?(): Promise<void> | void;
+}
+
+export interface RolePluginConfigSchema {
+  fields: ConfigField[];
+  defaultValues?: Record<string, any>;
+}
+
+export interface ConfigField {
+  key: string;
+  label: string;
+  type: 'string' | 'number' | 'boolean' | 'select' | 'multiselect' | 'textarea' | 'object';
+  required?: boolean;
+  defaultValue?: any;
+  description?: string;
+  options?: { value: any; label: string }[];
+  validation?: {
+    min?: number;
+    max?: number;
+    pattern?: string;
+    minLength?: number;
+    maxLength?: number;
+  };
+  conditional?: {
+    dependsOn: string;
+    value: any;
+  };
+}
+
+export interface RoleExecutionResult {
+  type: 'continue' | 'revise' | 'error' | 'skip';
+  data?: any;
+  feedback?: string;
+  metadata?: Record<string, any>;
+}
+
+export interface PluginWorkflowProfile {
+  id: string;
+  name: string;
+  description: string;
+  version: string;
+  roles: PluginRoleInstance[];
+  executionOrder: string[];
+  globalSettings: Record<string, any>;
+  metadata: {
+    createdAt: string;
+    updatedAt: string;
+    author?: string;
+    tags?: string[];
+  };
+}
+
+export interface PluginRoleInstance {
+  id: string;
+  pluginId: string;
+  name: string;
+  description?: string;
+  config: RolePluginConfig;
+  executionSettings: {
+    enabled: boolean;
+    maxRetries?: number;
+    timeout?: number;
+    maxLoops?: number;
+    priority?: number;
+  };
+}
+
+// Built-in plugin implementations
+export class TechnicalWriterPlugin implements RolePlugin {
+  metadata: RolePluginMetadata = {
+    id: 'technical-writer-core',
+    name: 'Technical Writer',
+    version: '1.0.0',
+    description: 'Core technical writing plugin for creating and revising documentation',
+    author: 'System',
+    category: 'writer',
+    icon: '✍️',
+    tags: ['writing', 'documentation', 'core']
+  };
+
+  getConfigSchema(): RolePluginConfigSchema {
+    return {
+      fields: [
+        {
+          key: 'writingStyle',
+          label: 'Writing style',
+          type: 'select',
+          required: true,
+          defaultValue: 'professional',
+          options: [
+            { value: 'professional', label: 'Professional and formal' },
+            { value: 'conversational', label: 'Conversational and approachable' },
+            { value: 'technical', label: 'Technical and precise' },
+            { value: 'educational', label: 'Educational and explanatory' }
+          ],
+          description: 'Choose the tone and style for the writing'
+        },
+        {
+          key: 'targetAudience',
+          label: 'Target audience',
+          type: 'select',
+          required: true,
+          defaultValue: 'developers',
+          options: [
+            { value: 'beginners', label: 'Beginners/newcomers' },
+            { value: 'developers', label: 'Experienced developers' },
+            { value: 'architects', label: 'Technical architects' },
+            { value: 'mixed', label: 'Mixed audience' }
+          ],
+          description: 'Primary audience for the documentation'
+        },
+        {
+          key: 'includeExamples',
+          label: 'Include code examples',
+          type: 'boolean',
+          defaultValue: true,
+          description: 'Whether to include practical code examples'
+        },
+        {
+          key: 'complexityLevel',
+          label: 'Complexity level',
+          type: 'number',
+          defaultValue: 3,
+          validation: { min: 1, max: 5 },
+          description: 'Technical complexity level (1=basic, 5=advanced)'
+        },
+        {
+          key: 'customInstructions',
+          label: 'Custom instructions',
+          type: 'textarea',
+          description: 'Additional specific instructions for this writer'
+        }
+      ],
+      defaultValues: {
+        writingStyle: 'professional',
+        targetAudience: 'developers',
+        includeExamples: true,
+        complexityLevel: 3
+      }
+    };
+  }
+
+  validateConfig(config: RolePluginConfig): ValidationResult {
+    const errors: string[] = [];
+    
+    if (!config.writingStyle) {
+      errors.push('Writing style is required');
+    }
+    if (!config.targetAudience) {
+      errors.push('Target audience is required');
+    }
+    if (config.complexityLevel && (config.complexityLevel < 1 || config.complexityLevel > 5)) {
+      errors.push('Complexity level must be between 1 and 5');
+    }
+
+    return { isValid: errors.length === 0, errors };
+  }
+
+  async execute(context: ExecutionContext, config: RolePluginConfig): Promise<RoleExecutionResult> {
+    // This would integrate with the actual LLM service
+    const prompt = this.generatePrompt(context, config);
+    
+    // Simulate LLM call (would be replaced with actual service call)
+    try {
+      // const result = await callLLMTextGeneration(prompt);
+      // For demo purposes, return a mock result
+      return {
+        type: 'continue',
+        data: `Generated document using ${config.writingStyle} style for ${config.targetAudience}`,
+        metadata: {
+          prompt: prompt,
+          config: config
+        }
+      };
+    } catch (error) {
+      return {
+        type: 'error',
+        feedback: `Failed to generate content: ${error instanceof Error ? error.message : 'Unknown error'}`
+      };
+    }
+  }
+
+  private generatePrompt(context: ExecutionContext, config: RolePluginConfig): string {
+    return `You are an expert Technical Writer creating ${config.writingStyle} documentation for ${config.targetAudience}.
+
+Target audience: ${config.targetAudience}
+Writing style: ${config.writingStyle}
+Complexity level: ${config.complexityLevel}/5
+${config.includeExamples ? 'Include practical code examples and demonstrations.' : ''}
+${config.customInstructions ? `\nAdditional instructions:\n${config.customInstructions}` : ''}
+
+Your task is to create clear, comprehensive technical documentation that serves the needs of your target audience.
+
+Document to work with:
+${context.document}
+
+${context.sourceContent ? `Source content:\n${context.sourceContent}` : ''}
+${context.supportingContent ? `Supporting content:\n${context.supportingContent}` : ''}`;
+  }
+}
+
+export class TechnicalReviewerPlugin implements RolePlugin {
+  metadata: RolePluginMetadata = {
+    id: 'technical-reviewer-core',
+    name: 'Technical Reviewer',
+    version: '1.0.0',
+    description: 'Core technical review plugin for accuracy and completeness validation',
+    author: 'System',
+    category: 'reviewer',
+    icon: '🔍',
+    tags: ['review', 'accuracy', 'validation', 'core']
+  };
+
+  getConfigSchema(): RolePluginConfigSchema {
+    return {
+      fields: [
+        {
+          key: 'reviewFocus',
+          label: 'Review focus areas',
+          type: 'multiselect',
+          required: true,
+          defaultValue: ['accuracy', 'completeness'],
+          options: [
+            { value: 'accuracy', label: 'Technical accuracy' },
+            { value: 'completeness', label: 'Completeness of information' },
+            { value: 'codeQuality', label: 'Code example quality' },
+            { value: 'security', label: 'Security considerations' },
+            { value: 'performance', label: 'Performance implications' },
+            { value: 'bestPractices', label: 'Best practices adherence' }
+          ],
+          description: 'Select which aspects to focus on during review'
+        },
+        {
+          key: 'expertiseLevel',
+          label: 'Reviewer expertise level',
+          type: 'select',
+          required: true,
+          defaultValue: 'senior',
+          options: [
+            { value: 'junior', label: 'Junior reviewer' },
+            { value: 'mid', label: 'Mid-level reviewer' },
+            { value: 'senior', label: 'Senior reviewer' },
+            { value: 'expert', label: 'Subject matter expert' }
+          ],
+          description: 'Level of technical expertise for this reviewer'
+        },
+        {
+          key: 'strictnessLevel',
+          label: 'Review strictness',
+          type: 'number',
+          defaultValue: 3,
+          validation: { min: 1, max: 5 },
+          description: 'How strict should the review be (1=lenient, 5=very strict)'
+        },
+        {
+          key: 'mustVerifyCode',
+          label: 'Must verify all code examples',
+          type: 'boolean',
+          defaultValue: true,
+          description: 'Require verification of all code examples against source'
+        }
+      ]
+    };
+  }
+
+  validateConfig(config: RolePluginConfig): ValidationResult {
+    const errors: string[] = [];
+    
+    if (!config.reviewFocus || !Array.isArray(config.reviewFocus) || config.reviewFocus.length === 0) {
+      errors.push('At least one review focus area must be selected');
+    }
+    if (!config.expertiseLevel) {
+      errors.push('Expertise level is required');
+    }
+
+    return { isValid: errors.length === 0, errors };
+  }
+
+  async execute(context: ExecutionContext, config: RolePluginConfig): Promise<RoleExecutionResult> {
+    const prompt = this.generateReviewPrompt(context, config);
+    
+    try {
+      // Simulate review decision (would be replaced with actual LLM service call)
+      // const decision = await callLLMReview(prompt);
+      
+      // For demo purposes, simulate a review decision
+      const needsRevision = Math.random() > 0.7; // 30% chance of needing revision
+      
+      if (needsRevision) {
+        return {
+          type: 'revise',
+          feedback: `Technical review found issues in ${config.reviewFocus.join(', ')} areas. Please address the following concerns...`,
+          metadata: {
+            reviewFocus: config.reviewFocus,
+            expertiseLevel: config.expertiseLevel,
+            iteration: context.iteration
+          }
+        };
+      } else {
+        return {
+          type: 'continue',
+          data: 'Technical review passed',
+          metadata: {
+            reviewFocus: config.reviewFocus,
+            expertiseLevel: config.expertiseLevel
+          }
+        };
+      }
+    } catch (error) {
+      return {
+        type: 'error',
+        feedback: `Review failed: ${error instanceof Error ? error.message : 'Unknown error'}`
+      };
+    }
+  }
+
+  private generateReviewPrompt(context: ExecutionContext, config: RolePluginConfig): string {
+    return `You are a ${config.expertiseLevel} Technical Reviewer with expertise in technical documentation review.
+
+Review focus areas: ${config.reviewFocus.join(', ')}
+Expertise level: ${config.expertiseLevel}
+Review strictness: ${config.strictnessLevel}/5
+${config.mustVerifyCode ? 'CRITICAL: You must verify all code examples against the provided source code.' : ''}
+
+Document to review:
+${context.document}
+
+${context.sourceContent ? `Source content for verification:\n${context.sourceContent}` : ''}
+
+CRITICAL INSTRUCTION: You MUST respond in one of the following two formats ONLY:
+
+1. If the document meets all quality standards: CONTINUE
+
+2. If the document requires revisions: REVISE: [Provide specific feedback]`;
+  }
+}
+
+// Default plugin registry
+export const DEFAULT_PLUGINS: RolePlugin[] = [
+  new TechnicalWriterPlugin(),
+  new TechnicalReviewerPlugin()
+];
+
+export const PLUGIN_WORKFLOW_PROFILES: PluginWorkflowProfile[] = [
+  {
+    id: 'default-plugin-workflow',
+    name: 'Default Plugin Workflow',
+    description: 'Standard workflow using core plugins',
+    version: '1.0.0',
+    roles: [
+      {
+        id: 'writer-1',
+        pluginId: 'technical-writer-core',
+        name: 'Technical Writer',
+        description: 'Primary documentation writer',
+        config: {
+          writingStyle: 'professional',
+          targetAudience: 'developers',
+          includeExamples: true,
+          complexityLevel: 3,
+          customInstructions: ''
+        },
+        executionSettings: {
+          enabled: true,
+          timeout: 300,
+          maxRetries: 2
+        }
+      },
+      {
+        id: 'reviewer-1',
+        pluginId: 'technical-reviewer-core',
+        name: 'Technical Reviewer',
+        description: 'Reviews technical accuracy',
+        config: {
+          reviewFocus: ['accuracy', 'completeness'],
+          expertiseLevel: 'senior',
+          strictnessLevel: 3,
+          mustVerifyCode: true
+        },
+        executionSettings: {
+          enabled: true,
+          maxLoops: 3,
+          timeout: 180,
+          maxRetries: 1
+        }
+      }
+    ],
+    executionOrder: ['writer-1', 'reviewer-1'],
+    globalSettings: {
+      maxTotalIterations: 15,
+      timeoutMinutes: 30,
+      allowParallelExecution: false
+    },
+    metadata: {
+      createdAt: new Date().toISOString(),
+      updatedAt: new Date().toISOString(),
+      author: 'System',
+      tags: ['default', 'plugin-based']
+    }
+  }
+];
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