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Add custom message extension system with typed renderers and message transformer

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- Implement CustomMessages interface for type-safe message extension via declaration merging
- Add MessageRenderer<T> with generic typing for custom message rendering
- Add messageTransformer to Agent for filtering/transforming messages before LLM
- Move message filtering from transports to Agent (separation of concerns)
- Add message renderer registry with typed role support
- Update web-ui example with SystemNotificationMessage demo
- Add custom transformer that converts notifications to <system> tags
- Add SessionListDialog onDelete callback for active session cleanup
- Handle non-existent session IDs in URL (redirect to new session)
- Update both web-ui example and browser extension with session fixes
This commit is contained in:
Mario Zechner 2025-10-06 13:45:08 +02:00
parent cf6b3466f8
commit 05dfaa11a8
12 changed files with 457 additions and 152 deletions
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18
packages/web-ui/src/components/Messages.ts
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@ -16,7 +16,23 @@ import { formatUsage } from "../utils/format.js";
import { i18n } from "../utils/i18n.js";
export type UserMessageWithAttachments = UserMessageType & { attachments?: Attachment[] };
export type AppMessage = AssistantMessageType | UserMessageWithAttachments | ToolResultMessageType;
// Base message union
type BaseMessage = AssistantMessageType | UserMessageWithAttachments | ToolResultMessageType;
// Extensible interface - apps can extend via declaration merging
// Example:
// declare module "@mariozechner/pi-web-ui" {
// interface CustomMessages {
// "system-notification": SystemNotificationMessage;
// }
// }
export interface CustomMessages {
// Empty by default - apps extend via declaration merging
}
// AppMessage is union of base messages + custom messages
export type AppMessage = BaseMessage | CustomMessages[keyof CustomMessages];
@customElement("user-message")
export class UserMessage extends LitElement {