diff --git a/packages/audit_log/seed/schema/entities.yaml b/packages/audit_log/seed/schema/entities.yaml
new file mode 100644
index 000000000..243748d9b
--- /dev/null
+++ b/packages/audit_log/seed/schema/entities.yaml
@@ -0,0 +1,98 @@
+# Schema definitions owned by audit_log package
+# Checksum is auto-generated and validated when multiple packages reference same entity
+
+entities:
+  - name: AuditLog
+    version: "1.0"
+    description: "Audit log entry for tracking user and system actions"
+    checksum: null  # Auto-computed from fields
+    
+    fields:
+      id:
+        type: cuid
+        primary: true
+        generated: true
+        
+      tenantId:
+        type: string
+        required: true
+        index: true
+        
+      userId:
+        type: string
+        nullable: true
+        index: true
+        
+      username:
+        type: string
+        nullable: true
+        
+      action:
+        type: string
+        required: true
+        index: true
+        enum: [create, update, delete, login, logout, access, execute, export, import]
+        
+      entity:
+        type: string
+        required: true
+        maxLength: 100
+        
+      entityId:
+        type: string
+        nullable: true
+        
+      oldValue:
+        type: string
+        nullable: true
+        description: "JSON: previous state"
+        
+      newValue:
+        type: string
+        nullable: true
+        description: "JSON: new state"
+        
+      ipAddress:
+        type: string
+        nullable: true
+        maxLength: 45
+        
+      userAgent:
+        type: string
+        nullable: true
+        
+      details:
+        type: string
+        nullable: true
+        description: "JSON: additional context"
+        
+      timestamp:
+        type: bigint
+        required: true
+        index: true
+
+    indexes:
+      - fields: [tenantId]
+      - fields: [userId]
+      - fields: [entity, entityId]
+      - fields: [action]
+      - fields: [timestamp]
+
+    relations:
+      - name: tenant
+        type: belongsTo
+        entity: Tenant
+        field: tenantId
+        onDelete: Cascade
+      - name: user
+        type: belongsTo
+        entity: User
+        field: userId
+        onDelete: SetNull
+        optional: true
+
+    acl:
+      create: [admin, system]
+      read: [admin, god]
+      update: [supergod]
+      delete: [supergod]
diff --git a/packages/forum_forge/seed/schema/entities.yaml b/packages/forum_forge/seed/schema/entities.yaml
new file mode 100644
index 000000000..77a108538
--- /dev/null
+++ b/packages/forum_forge/seed/schema/entities.yaml
@@ -0,0 +1,244 @@
+# Schema definitions owned by forum_forge package
+
+entities:
+  - name: ForumCategory
+    version: "1.0"
+    description: "Forum category for organizing discussion threads"
+    checksum: null
+    
+    fields:
+      id:
+        type: cuid
+        primary: true
+        generated: true
+        
+      tenantId:
+        type: string
+        required: true
+        index: true
+        
+      name:
+        type: string
+        required: true
+        maxLength: 100
+        
+      description:
+        type: string
+        nullable: true
+        
+      icon:
+        type: string
+        nullable: true
+        
+      slug:
+        type: string
+        required: true
+        maxLength: 100
+        
+      sortOrder:
+        type: int
+        default: 0
+        
+      parentId:
+        type: string
+        nullable: true
+        index: true
+        
+      createdAt:
+        type: bigint
+        required: true
+
+    indexes:
+      - fields: [tenantId, slug]
+        unique: true
+      - fields: [tenantId]
+      - fields: [parentId]
+
+    relations:
+      - name: tenant
+        type: belongsTo
+        entity: Tenant
+        field: tenantId
+        onDelete: Cascade
+      - name: threads
+        type: hasMany
+        entity: ForumThread
+        foreignKey: categoryId
+
+    acl:
+      create: [admin]
+      read: [public]
+      update: [admin]
+      delete: [admin]
+
+  - name: ForumThread
+    version: "1.0"
+    description: "Forum discussion thread"
+    checksum: null
+    
+    fields:
+      id:
+        type: cuid
+        primary: true
+        generated: true
+        
+      tenantId:
+        type: string
+        required: true
+        index: true
+        
+      categoryId:
+        type: string
+        required: true
+        index: true
+        
+      authorId:
+        type: string
+        required: true
+        index: true
+        
+      title:
+        type: string
+        required: true
+        maxLength: 200
+        
+      content:
+        type: string
+        required: true
+        
+      slug:
+        type: string
+        required: true
+        
+      isPinned:
+        type: boolean
+        default: false
+        
+      isLocked:
+        type: boolean
+        default: false
+        
+      viewCount:
+        type: int
+        default: 0
+        
+      replyCount:
+        type: int
+        default: 0
+        
+      lastReplyAt:
+        type: bigint
+        nullable: true
+        
+      lastReplyBy:
+        type: string
+        nullable: true
+        
+      createdAt:
+        type: bigint
+        required: true
+        
+      updatedAt:
+        type: bigint
+        nullable: true
+
+    indexes:
+      - fields: [tenantId, slug]
+        unique: true
+      - fields: [tenantId]
+      - fields: [categoryId]
+      - fields: [authorId]
+      - fields: [isPinned, lastReplyAt]
+
+    relations:
+      - name: category
+        type: belongsTo
+        entity: ForumCategory
+        field: categoryId
+        onDelete: Cascade
+      - name: author
+        type: belongsTo
+        entity: User
+        field: authorId
+        onDelete: Cascade
+      - name: posts
+        type: hasMany
+        entity: ForumPost
+        foreignKey: threadId
+
+    acl:
+      create: [user]
+      read: [public]
+      update: [self, moderator]
+      delete: [self, moderator]
+      rowLevel: "authorId = $user.id"
+
+  - name: ForumPost
+    version: "1.0"
+    description: "Forum reply/post within a thread"
+    checksum: null
+    
+    fields:
+      id:
+        type: cuid
+        primary: true
+        generated: true
+        
+      tenantId:
+        type: string
+        required: true
+        index: true
+        
+      threadId:
+        type: string
+        required: true
+        index: true
+        
+      authorId:
+        type: string
+        required: true
+        index: true
+        
+      content:
+        type: string
+        required: true
+        
+      likes:
+        type: int
+        default: 0
+        
+      isEdited:
+        type: boolean
+        default: false
+        
+      createdAt:
+        type: bigint
+        required: true
+        
+      updatedAt:
+        type: bigint
+        nullable: true
+
+    indexes:
+      - fields: [tenantId]
+      - fields: [threadId]
+      - fields: [authorId]
+
+    relations:
+      - name: thread
+        type: belongsTo
+        entity: ForumThread
+        field: threadId
+        onDelete: Cascade
+      - name: author
+        type: belongsTo
+        entity: User
+        field: authorId
+        onDelete: Cascade
+
+    acl:
+      create: [user]
+      read: [public]
+      update: [self, moderator]
+      delete: [self, moderator]
+      rowLevel: "authorId = $user.id"
diff --git a/packages/irc_webchat/seed/schema/entities.yaml b/packages/irc_webchat/seed/schema/entities.yaml
new file mode 100644
index 000000000..4bac48c15
--- /dev/null
+++ b/packages/irc_webchat/seed/schema/entities.yaml
@@ -0,0 +1,230 @@
+# Schema definitions owned by irc_webchat package
+
+entities:
+  - name: IRCChannel
+    version: "1.0"
+    description: "IRC-style chat channel"
+    checksum: null
+    
+    fields:
+      id:
+        type: cuid
+        primary: true
+        generated: true
+        
+      tenantId:
+        type: string
+        required: true
+        index: true
+        
+      name:
+        type: string
+        required: true
+        maxLength: 50
+        
+      topic:
+        type: string
+        nullable: true
+        maxLength: 500
+        
+      description:
+        type: string
+        nullable: true
+        
+      mode:
+        type: string
+        required: true
+        default: "public"
+        enum: [public, private, secret]
+        
+      password:
+        type: string
+        nullable: true
+        
+      maxUsers:
+        type: int
+        nullable: true
+        
+      slowMode:
+        type: int
+        nullable: true
+        description: "Seconds between messages"
+        
+      isDefault:
+        type: boolean
+        default: false
+        index: true
+        
+      createdAt:
+        type: bigint
+        required: true
+        
+      createdBy:
+        type: string
+        nullable: true
+
+    indexes:
+      - fields: [tenantId, name]
+        unique: true
+      - fields: [tenantId]
+      - fields: [isDefault]
+
+    relations:
+      - name: messages
+        type: hasMany
+        entity: IRCMessage
+        foreignKey: channelId
+      - name: memberships
+        type: hasMany
+        entity: IRCMembership
+        foreignKey: channelId
+
+    acl:
+      create: [moderator]
+      read: [user]
+      update: [moderator]
+      delete: [admin]
+
+  - name: IRCMessage
+    version: "1.0"
+    description: "IRC chat message"
+    checksum: null
+    
+    fields:
+      id:
+        type: cuid
+        primary: true
+        generated: true
+        
+      tenantId:
+        type: string
+        required: true
+        
+      channelId:
+        type: string
+        required: true
+        index: true
+        
+      userId:
+        type: string
+        required: true
+        index: true
+        
+      username:
+        type: string
+        required: true
+        
+      type:
+        type: string
+        required: true
+        default: "message"
+        enum: [message, action, notice, system, join, part, kick, ban]
+        
+      content:
+        type: string
+        required: true
+        
+      isCommand:
+        type: boolean
+        default: false
+        
+      metadata:
+        type: string
+        nullable: true
+        description: "JSON: mentions, links, etc."
+        
+      createdAt:
+        type: bigint
+        required: true
+        index: true
+
+    indexes:
+      - fields: [channelId]
+      - fields: [userId]
+      - fields: [createdAt]
+
+    relations:
+      - name: channel
+        type: belongsTo
+        entity: IRCChannel
+        field: channelId
+        onDelete: Cascade
+
+    acl:
+      create: [user]
+      read: [user]
+      update: [supergod]
+      delete: [moderator]
+
+  - name: IRCMembership
+    version: "1.0"
+    description: "User membership in an IRC channel"
+    checksum: null
+    
+    fields:
+      id:
+        type: cuid
+        primary: true
+        generated: true
+        
+      channelId:
+        type: string
+        required: true
+        index: true
+        
+      userId:
+        type: string
+        required: true
+        index: true
+        
+      username:
+        type: string
+        required: true
+        
+      role:
+        type: string
+        required: true
+        default: "user"
+        enum: [user, voice, halfop, op, admin, owner]
+        
+      joinedAt:
+        type: bigint
+        required: true
+        
+      lastActive:
+        type: bigint
+        nullable: true
+        
+      isBanned:
+        type: boolean
+        default: false
+        
+      isKicked:
+        type: boolean
+        default: false
+        
+      kickReason:
+        type: string
+        nullable: true
+        
+      metadata:
+        type: string
+        nullable: true
+
+    indexes:
+      - fields: [channelId, userId]
+        unique: true
+      - fields: [userId]
+
+    relations:
+      - name: channel
+        type: belongsTo
+        entity: IRCChannel
+        field: channelId
+        onDelete: Cascade
+
+    acl:
+      create: [user]
+      read: [user]
+      update: [moderator]
+      delete: [moderator]
diff --git a/packages/notification_center/seed/schema/entities.yaml b/packages/notification_center/seed/schema/entities.yaml
new file mode 100644
index 000000000..eea367de3
--- /dev/null
+++ b/packages/notification_center/seed/schema/entities.yaml
@@ -0,0 +1,85 @@
+# Schema definitions owned by notification_center package
+
+entities:
+  - name: Notification
+    version: "1.0"
+    description: "User notification for alerts, messages, and system events"
+    checksum: null
+    
+    fields:
+      id:
+        type: cuid
+        primary: true
+        generated: true
+        
+      tenantId:
+        type: string
+        required: true
+        index: true
+        
+      userId:
+        type: string
+        required: true
+        index: true
+        
+      type:
+        type: string
+        required: true
+        enum: [info, warning, success, error, mention, reply, follow, like, system]
+        
+      title:
+        type: string
+        required: true
+        maxLength: 200
+        
+      message:
+        type: string
+        required: true
+        
+      icon:
+        type: string
+        nullable: true
+        
+      read:
+        type: boolean
+        default: false
+        index: true
+        
+      data:
+        type: string
+        nullable: true
+        description: "JSON: action URLs, entity refs, etc."
+        
+      createdAt:
+        type: bigint
+        required: true
+        index: true
+        
+      expiresAt:
+        type: bigint
+        nullable: true
+        index: true
+
+    indexes:
+      - fields: [tenantId]
+      - fields: [userId, read]
+      - fields: [createdAt]
+
+    relations:
+      - name: tenant
+        type: belongsTo
+        entity: Tenant
+        field: tenantId
+        onDelete: Cascade
+      - name: user
+        type: belongsTo
+        entity: User
+        field: userId
+        onDelete: Cascade
+
+    acl:
+      create: [system, admin]
+      read: [self]
+      update: [self]
+      delete: [self]
+      rowLevel: "userId = $user.id"