mirror of
https://github.com/getcompanion-ai/co-mono.git
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01dae9ebcc
- Check response.stopReason instead of catching errors for abort detection - Return result object from _generateBranchSummary instead of throwing - Fix summary attachment: attach to navigation target position, not old branch - Support root-level summaries (parentId=null) in branchWithSummary - Remove setTimeout hack for re-showing tree selector on abort
2010 lines
62 KiB
TypeScript
2010 lines
62 KiB
TypeScript
/**
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* AgentSession - Core abstraction for agent lifecycle and session management.
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*
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* This class is shared between all run modes (interactive, print, rpc).
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* It encapsulates:
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* - Agent state access
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* - Event subscription with automatic session persistence
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* - Model and thinking level management
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* - Compaction (manual and auto)
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* - Bash execution
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* - Session switching and branching
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*
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* Modes use this class and add their own I/O layer on top.
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*/
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import type { Agent, AgentEvent, AgentMessage, AgentState, ThinkingLevel } from "@mariozechner/pi-agent-core";
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import type { AssistantMessage, ImageContent, Message, Model, TextContent } from "@mariozechner/pi-ai";
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import { isContextOverflow, modelsAreEqual, supportsXhigh } from "@mariozechner/pi-ai";
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import { getAuthPath } from "../config.js";
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import { type BashResult, executeBash as executeBashCommand } from "./bash-executor.js";
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import {
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type CompactionResult,
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calculateContextTokens,
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compact,
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prepareCompaction,
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shouldCompact,
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} from "./compaction.js";
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import type { LoadedCustomTool, SessionEvent as ToolSessionEvent } from "./custom-tools/index.js";
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import { exportSessionToHtml } from "./export-html.js";
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import type {
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HookCommandContext,
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HookRunner,
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SessionBeforeBranchResult,
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SessionBeforeCompactResult,
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SessionBeforeNewResult,
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SessionBeforeSwitchResult,
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SessionBeforeTreeResult,
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TreePreparation,
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TurnEndEvent,
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TurnStartEvent,
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} from "./hooks/index.js";
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import type { BashExecutionMessage, HookMessage } from "./messages.js";
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import type { ModelRegistry } from "./model-registry.js";
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import type { BranchSummaryEntry, CompactionEntry, SessionEntry, SessionManager } from "./session-manager.js";
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import type { SettingsManager, SkillsSettings } from "./settings-manager.js";
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import { expandSlashCommand, type FileSlashCommand } from "./slash-commands.js";
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/** Session-specific events that extend the core AgentEvent */
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export type AgentSessionEvent =
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| AgentEvent
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| { type: "auto_compaction_start"; reason: "threshold" | "overflow" }
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| { type: "auto_compaction_end"; result: CompactionResult | undefined; aborted: boolean; willRetry: boolean }
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| { type: "auto_retry_start"; attempt: number; maxAttempts: number; delayMs: number; errorMessage: string }
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| { type: "auto_retry_end"; success: boolean; attempt: number; finalError?: string };
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/** Listener function for agent session events */
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export type AgentSessionEventListener = (event: AgentSessionEvent) => void;
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// ============================================================================
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// Types
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// ============================================================================
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export interface AgentSessionConfig {
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agent: Agent;
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sessionManager: SessionManager;
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settingsManager: SettingsManager;
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/** Models to cycle through with Ctrl+P (from --models flag) */
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scopedModels?: Array<{ model: Model<any>; thinkingLevel: ThinkingLevel }>;
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/** File-based slash commands for expansion */
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fileCommands?: FileSlashCommand[];
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/** Hook runner (created in main.ts with wrapped tools) */
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hookRunner?: HookRunner;
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/** Custom tools for session lifecycle events */
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customTools?: LoadedCustomTool[];
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skillsSettings?: Required<SkillsSettings>;
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/** Model registry for API key resolution and model discovery */
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modelRegistry: ModelRegistry;
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}
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/** Options for AgentSession.prompt() */
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export interface PromptOptions {
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/** Whether to expand file-based slash commands (default: true) */
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expandSlashCommands?: boolean;
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/** Image attachments */
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images?: ImageContent[];
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}
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/** Result from cycleModel() */
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export interface ModelCycleResult {
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model: Model<any>;
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thinkingLevel: ThinkingLevel;
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/** Whether cycling through scoped models (--models flag) or all available */
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isScoped: boolean;
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}
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/** Session statistics for /session command */
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export interface SessionStats {
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sessionFile: string | undefined;
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sessionId: string;
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userMessages: number;
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assistantMessages: number;
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toolCalls: number;
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toolResults: number;
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totalMessages: number;
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tokens: {
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input: number;
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output: number;
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cacheRead: number;
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cacheWrite: number;
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total: number;
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};
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cost: number;
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}
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/** Internal marker for hook messages queued through the agent loop */
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// ============================================================================
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// Constants
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// ============================================================================
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/** Standard thinking levels */
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const THINKING_LEVELS: ThinkingLevel[] = ["off", "minimal", "low", "medium", "high"];
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/** Thinking levels including xhigh (for supported models) */
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const THINKING_LEVELS_WITH_XHIGH: ThinkingLevel[] = ["off", "minimal", "low", "medium", "high", "xhigh"];
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// ============================================================================
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// AgentSession Class
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// ============================================================================
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export class AgentSession {
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readonly agent: Agent;
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readonly sessionManager: SessionManager;
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readonly settingsManager: SettingsManager;
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private _scopedModels: Array<{ model: Model<any>; thinkingLevel: ThinkingLevel }>;
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private _fileCommands: FileSlashCommand[];
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// Event subscription state
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private _unsubscribeAgent?: () => void;
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private _eventListeners: AgentSessionEventListener[] = [];
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// Message queue state
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private _queuedMessages: string[] = [];
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// Compaction state
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private _compactionAbortController: AbortController | undefined = undefined;
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private _autoCompactionAbortController: AbortController | undefined = undefined;
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// Branch summarization state
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private _branchSummaryAbortController: AbortController | undefined = undefined;
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// Retry state
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private _retryAbortController: AbortController | undefined = undefined;
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private _retryAttempt = 0;
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private _retryPromise: Promise<void> | undefined = undefined;
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private _retryResolve: (() => void) | undefined = undefined;
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// Bash execution state
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private _bashAbortController: AbortController | undefined = undefined;
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private _pendingBashMessages: BashExecutionMessage[] = [];
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// Hook system
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private _hookRunner: HookRunner | undefined = undefined;
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private _turnIndex = 0;
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// Custom tools for session lifecycle
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private _customTools: LoadedCustomTool[] = [];
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private _skillsSettings: Required<SkillsSettings> | undefined;
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// Model registry for API key resolution
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private _modelRegistry: ModelRegistry;
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constructor(config: AgentSessionConfig) {
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this.agent = config.agent;
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this.sessionManager = config.sessionManager;
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this.settingsManager = config.settingsManager;
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this._scopedModels = config.scopedModels ?? [];
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this._fileCommands = config.fileCommands ?? [];
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this._hookRunner = config.hookRunner;
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this._customTools = config.customTools ?? [];
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this._skillsSettings = config.skillsSettings;
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this._modelRegistry = config.modelRegistry;
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// Always subscribe to agent events for internal handling
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// (session persistence, hooks, auto-compaction, retry logic)
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this._unsubscribeAgent = this.agent.subscribe(this._handleAgentEvent);
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}
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/** Model registry for API key resolution and model discovery */
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get modelRegistry(): ModelRegistry {
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return this._modelRegistry;
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}
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// =========================================================================
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// Event Subscription
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// =========================================================================
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/** Emit an event to all listeners */
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private _emit(event: AgentSessionEvent): void {
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for (const l of this._eventListeners) {
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l(event);
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}
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}
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// Track last assistant message for auto-compaction check
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private _lastAssistantMessage: AssistantMessage | undefined = undefined;
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/** Internal handler for agent events - shared by subscribe and reconnect */
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private _handleAgentEvent = async (event: AgentEvent): Promise<void> => {
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// When a user message starts, check if it's from the queue and remove it BEFORE emitting
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// This ensures the UI sees the updated queue state
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if (event.type === "message_start" && event.message.role === "user" && this._queuedMessages.length > 0) {
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// Extract text content from the message
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const messageText = this._getUserMessageText(event.message);
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if (messageText && this._queuedMessages.includes(messageText)) {
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// Remove the first occurrence of this message from the queue
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const index = this._queuedMessages.indexOf(messageText);
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if (index !== -1) {
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this._queuedMessages.splice(index, 1);
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}
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}
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}
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// Emit to hooks first
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await this._emitHookEvent(event);
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// Notify all listeners
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this._emit(event);
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// Handle session persistence
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if (event.type === "message_end") {
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// Check if this is a hook message
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if (event.message.role === "hookMessage") {
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// Persist as CustomMessageEntry
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this.sessionManager.appendCustomMessageEntry(
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event.message.customType,
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event.message.content,
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event.message.display,
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event.message.details,
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);
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} else if (
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event.message.role === "user" ||
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event.message.role === "assistant" ||
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event.message.role === "toolResult"
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) {
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// Regular LLM message - persist as SessionMessageEntry
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this.sessionManager.appendMessage(event.message);
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}
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// Other message types (bashExecution, compactionSummary, branchSummary) are persisted elsewhere
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// Track assistant message for auto-compaction (checked on agent_end)
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if (event.message.role === "assistant") {
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this._lastAssistantMessage = event.message;
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}
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}
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// Check auto-retry and auto-compaction after agent completes
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if (event.type === "agent_end" && this._lastAssistantMessage) {
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const msg = this._lastAssistantMessage;
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this._lastAssistantMessage = undefined;
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// Check for retryable errors first (overloaded, rate limit, server errors)
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if (this._isRetryableError(msg)) {
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const didRetry = await this._handleRetryableError(msg);
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if (didRetry) return; // Retry was initiated, don't proceed to compaction
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} else if (this._retryAttempt > 0) {
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// Previous retry succeeded - emit success event and reset counter
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this._emit({
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type: "auto_retry_end",
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success: true,
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attempt: this._retryAttempt,
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});
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this._retryAttempt = 0;
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// Resolve the retry promise so waitForRetry() completes
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this._resolveRetry();
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}
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await this._checkCompaction(msg);
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}
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};
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/** Resolve the pending retry promise */
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private _resolveRetry(): void {
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if (this._retryResolve) {
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this._retryResolve();
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this._retryResolve = undefined;
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this._retryPromise = undefined;
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}
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}
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/** Extract text content from a message */
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private _getUserMessageText(message: Message): string {
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if (message.role !== "user") return "";
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const content = message.content;
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if (typeof content === "string") return content;
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const textBlocks = content.filter((c) => c.type === "text");
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return textBlocks.map((c) => (c as TextContent).text).join("");
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}
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/** Find the last assistant message in agent state (including aborted ones) */
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private _findLastAssistantMessage(): AssistantMessage | undefined {
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const messages = this.agent.state.messages;
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for (let i = messages.length - 1; i >= 0; i--) {
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const msg = messages[i];
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if (msg.role === "assistant") {
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return msg as AssistantMessage;
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}
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}
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return undefined;
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}
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/** Emit hook events based on agent events */
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private async _emitHookEvent(event: AgentEvent): Promise<void> {
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if (!this._hookRunner) return;
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if (event.type === "agent_start") {
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this._turnIndex = 0;
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await this._hookRunner.emit({ type: "agent_start" });
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} else if (event.type === "agent_end") {
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await this._hookRunner.emit({ type: "agent_end", messages: event.messages });
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} else if (event.type === "turn_start") {
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const hookEvent: TurnStartEvent = {
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type: "turn_start",
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turnIndex: this._turnIndex,
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timestamp: Date.now(),
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};
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await this._hookRunner.emit(hookEvent);
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} else if (event.type === "turn_end") {
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const hookEvent: TurnEndEvent = {
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type: "turn_end",
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turnIndex: this._turnIndex,
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message: event.message,
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toolResults: event.toolResults,
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};
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await this._hookRunner.emit(hookEvent);
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this._turnIndex++;
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}
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}
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/**
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* Subscribe to agent events.
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* Session persistence is handled internally (saves messages on message_end).
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* Multiple listeners can be added. Returns unsubscribe function for this listener.
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*/
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subscribe(listener: AgentSessionEventListener): () => void {
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this._eventListeners.push(listener);
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// Return unsubscribe function for this specific listener
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return () => {
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const index = this._eventListeners.indexOf(listener);
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if (index !== -1) {
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this._eventListeners.splice(index, 1);
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}
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};
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}
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/**
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* Temporarily disconnect from agent events.
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* User listeners are preserved and will receive events again after resubscribe().
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* Used internally during operations that need to pause event processing.
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*/
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private _disconnectFromAgent(): void {
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if (this._unsubscribeAgent) {
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this._unsubscribeAgent();
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this._unsubscribeAgent = undefined;
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}
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}
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/**
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* Reconnect to agent events after _disconnectFromAgent().
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* Preserves all existing listeners.
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*/
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private _reconnectToAgent(): void {
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if (this._unsubscribeAgent) return; // Already connected
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this._unsubscribeAgent = this.agent.subscribe(this._handleAgentEvent);
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}
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/**
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* Remove all listeners and disconnect from agent.
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* Call this when completely done with the session.
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*/
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dispose(): void {
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this._disconnectFromAgent();
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this._eventListeners = [];
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}
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// =========================================================================
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// Read-only State Access
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// =========================================================================
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/** Full agent state */
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get state(): AgentState {
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return this.agent.state;
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}
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/** Current model (may be undefined if not yet selected) */
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get model(): Model<any> | undefined {
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return this.agent.state.model;
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}
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/** Current thinking level */
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get thinkingLevel(): ThinkingLevel {
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return this.agent.state.thinkingLevel;
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}
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/** Whether agent is currently streaming a response */
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get isStreaming(): boolean {
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return this.agent.state.isStreaming;
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}
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/** Whether auto-compaction is currently running */
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get isCompacting(): boolean {
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return this._autoCompactionAbortController !== undefined || this._compactionAbortController !== undefined;
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}
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/** All messages including custom types like BashExecutionMessage */
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get messages(): AgentMessage[] {
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return this.agent.state.messages;
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}
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/** Current queue mode */
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get queueMode(): "all" | "one-at-a-time" {
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return this.agent.getQueueMode();
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}
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/** Current session file path, or undefined if sessions are disabled */
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get sessionFile(): string | undefined {
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return this.sessionManager.getSessionFile();
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}
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/** Current session ID */
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get sessionId(): string {
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return this.sessionManager.getSessionId();
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}
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/** Scoped models for cycling (from --models flag) */
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get scopedModels(): ReadonlyArray<{ model: Model<any>; thinkingLevel: ThinkingLevel }> {
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return this._scopedModels;
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}
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/** File-based slash commands */
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get fileCommands(): ReadonlyArray<FileSlashCommand> {
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return this._fileCommands;
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}
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// =========================================================================
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// Prompting
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// =========================================================================
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/**
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* Send a prompt to the agent.
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* - Validates model and API key before sending
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* - Handles hook commands (registered via pi.registerCommand)
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* - Expands file-based slash commands by default
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* @throws Error if no model selected or no API key available
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*/
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async prompt(text: string, options?: PromptOptions): Promise<void> {
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// Flush any pending bash messages before the new prompt
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this._flushPendingBashMessages();
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const expandCommands = options?.expandSlashCommands ?? true;
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// Handle hook commands first (if enabled and text is a slash command)
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if (expandCommands && text.startsWith("/")) {
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const handled = await this._tryExecuteHookCommand(text);
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if (handled) {
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// Hook command executed, no prompt to send
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return;
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}
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}
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// Validate model
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if (!this.model) {
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throw new Error(
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"No model selected.\n\n" +
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`Use /login, set an API key environment variable, or create ${getAuthPath()}\n\n` +
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"Then use /model to select a model.",
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);
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}
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// Validate API key
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const apiKey = await this._modelRegistry.getApiKey(this.model);
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if (!apiKey) {
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throw new Error(
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`No API key found for ${this.model.provider}.\n\n` +
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`Use /login, set an API key environment variable, or create ${getAuthPath()}`,
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);
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}
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// Check if we need to compact before sending (catches aborted responses)
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const lastAssistant = this._findLastAssistantMessage();
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if (lastAssistant) {
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await this._checkCompaction(lastAssistant, false);
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}
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// Expand file-based slash commands if requested
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const expandedText = expandCommands ? expandSlashCommand(text, [...this._fileCommands]) : text;
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// Build messages array (hook message if any, then user message)
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const messages: AgentMessage[] = [];
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// Add user message
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const userContent: (TextContent | ImageContent)[] = [{ type: "text", text: expandedText }];
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if (options?.images) {
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userContent.push(...options.images);
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}
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messages.push({
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role: "user",
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content: userContent,
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timestamp: Date.now(),
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});
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// Emit before_agent_start hook event
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if (this._hookRunner) {
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const result = await this._hookRunner.emitBeforeAgentStart(expandedText, options?.images);
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if (result?.message) {
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messages.push({
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role: "hookMessage",
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customType: result.message.customType,
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content: result.message.content,
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display: result.message.display,
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details: result.message.details,
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timestamp: Date.now(),
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});
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}
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}
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await this.agent.prompt(messages);
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await this.waitForRetry();
|
|
}
|
|
|
|
/**
|
|
* Try to execute a hook command. Returns true if command was found and executed.
|
|
*/
|
|
private async _tryExecuteHookCommand(text: string): Promise<boolean> {
|
|
if (!this._hookRunner) return false;
|
|
|
|
// Parse command name and args
|
|
const spaceIndex = text.indexOf(" ");
|
|
const commandName = spaceIndex === -1 ? text.slice(1) : text.slice(1, spaceIndex);
|
|
const args = spaceIndex === -1 ? "" : text.slice(spaceIndex + 1);
|
|
|
|
const command = this._hookRunner.getCommand(commandName);
|
|
if (!command) return false;
|
|
|
|
// Get UI context from hook runner (set by mode)
|
|
const uiContext = this._hookRunner.getUIContext();
|
|
if (!uiContext) return false;
|
|
|
|
// Build command context
|
|
const cwd = process.cwd();
|
|
const ctx: HookCommandContext = {
|
|
args,
|
|
ui: uiContext,
|
|
hasUI: this._hookRunner.getHasUI(),
|
|
cwd,
|
|
sessionManager: this.sessionManager,
|
|
modelRegistry: this._modelRegistry,
|
|
};
|
|
|
|
try {
|
|
await command.handler(ctx);
|
|
return true;
|
|
} catch (err) {
|
|
// Emit error via hook runner
|
|
this._hookRunner.emitError({
|
|
hookPath: `command:${commandName}`,
|
|
event: "command",
|
|
error: err instanceof Error ? err.message : String(err),
|
|
});
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Queue a message to be sent after the current response completes.
|
|
* Use when agent is currently streaming.
|
|
*/
|
|
async queueMessage(text: string): Promise<void> {
|
|
this._queuedMessages.push(text);
|
|
await this.agent.queueMessage({
|
|
role: "user",
|
|
content: [{ type: "text", text }],
|
|
timestamp: Date.now(),
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Send a hook message to the session. Creates a CustomMessageEntry.
|
|
*
|
|
* Handles three cases:
|
|
* - Streaming: queues message, processed when loop pulls from queue
|
|
* - Not streaming + triggerTurn: appends to state/session, starts new turn
|
|
* - Not streaming + no trigger: appends to state/session, no turn
|
|
*
|
|
* @param message Hook message with customType, content, display, details
|
|
* @param triggerTurn If true and not streaming, triggers a new LLM turn
|
|
*/
|
|
async sendHookMessage<T = unknown>(
|
|
message: Pick<HookMessage<T>, "customType" | "content" | "display" | "details">,
|
|
triggerTurn?: boolean,
|
|
): Promise<void> {
|
|
const appMessage = {
|
|
role: "hookMessage" as const,
|
|
customType: message.customType,
|
|
content: message.content,
|
|
display: message.display,
|
|
details: message.details,
|
|
timestamp: Date.now(),
|
|
} satisfies HookMessage<T>;
|
|
if (this.isStreaming) {
|
|
// Queue for processing by agent loop
|
|
await this.agent.queueMessage(appMessage);
|
|
} else if (triggerTurn) {
|
|
// Send as prompt - agent loop will emit message events
|
|
await this.agent.prompt(appMessage);
|
|
} else {
|
|
// Just append to agent state and session, no turn
|
|
this.agent.appendMessage(appMessage);
|
|
this.sessionManager.appendCustomMessageEntry(
|
|
message.customType,
|
|
message.content,
|
|
message.display,
|
|
message.details,
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Clear queued messages and return them.
|
|
* Useful for restoring to editor when user aborts.
|
|
*/
|
|
clearQueue(): string[] {
|
|
const queued = [...this._queuedMessages];
|
|
this._queuedMessages = [];
|
|
this.agent.clearMessageQueue();
|
|
return queued;
|
|
}
|
|
|
|
/** Number of messages currently queued */
|
|
get queuedMessageCount(): number {
|
|
return this._queuedMessages.length;
|
|
}
|
|
|
|
/** Get queued messages (read-only) */
|
|
getQueuedMessages(): readonly string[] {
|
|
return this._queuedMessages;
|
|
}
|
|
|
|
get skillsSettings(): Required<SkillsSettings> | undefined {
|
|
return this._skillsSettings;
|
|
}
|
|
|
|
/**
|
|
* Abort current operation and wait for agent to become idle.
|
|
*/
|
|
async abort(): Promise<void> {
|
|
this.abortRetry();
|
|
this.agent.abort();
|
|
await this.agent.waitForIdle();
|
|
}
|
|
|
|
/**
|
|
* Reset agent and session to start fresh.
|
|
* Clears all messages and starts a new session.
|
|
* Listeners are preserved and will continue receiving events.
|
|
* @returns true if reset completed, false if cancelled by hook
|
|
*/
|
|
async reset(): Promise<boolean> {
|
|
const previousSessionFile = this.sessionFile;
|
|
|
|
// Emit session_before_new event (can be cancelled)
|
|
if (this._hookRunner?.hasHandlers("session_before_new")) {
|
|
const result = (await this._hookRunner.emit({
|
|
type: "session_before_new",
|
|
})) as SessionBeforeNewResult | undefined;
|
|
|
|
if (result?.cancel) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
this._disconnectFromAgent();
|
|
await this.abort();
|
|
this.agent.reset();
|
|
this.sessionManager.newSession();
|
|
this._queuedMessages = [];
|
|
this._reconnectToAgent();
|
|
|
|
// Emit session_new event to hooks
|
|
if (this._hookRunner) {
|
|
await this._hookRunner.emit({
|
|
type: "session_new",
|
|
});
|
|
}
|
|
|
|
// Emit session event to custom tools
|
|
await this._emitToolSessionEvent("new", previousSessionFile);
|
|
return true;
|
|
}
|
|
|
|
// =========================================================================
|
|
// Model Management
|
|
// =========================================================================
|
|
|
|
/**
|
|
* Set model directly.
|
|
* Validates API key, saves to session and settings.
|
|
* @throws Error if no API key available for the model
|
|
*/
|
|
async setModel(model: Model<any>): Promise<void> {
|
|
const apiKey = await this._modelRegistry.getApiKey(model);
|
|
if (!apiKey) {
|
|
throw new Error(`No API key for ${model.provider}/${model.id}`);
|
|
}
|
|
|
|
this.agent.setModel(model);
|
|
this.sessionManager.appendModelChange(model.provider, model.id);
|
|
this.settingsManager.setDefaultModelAndProvider(model.provider, model.id);
|
|
|
|
// Re-clamp thinking level for new model's capabilities
|
|
this.setThinkingLevel(this.thinkingLevel);
|
|
}
|
|
|
|
/**
|
|
* Cycle to next/previous model.
|
|
* Uses scoped models (from --models flag) if available, otherwise all available models.
|
|
* @param direction - "forward" (default) or "backward"
|
|
* @returns The new model info, or undefined if only one model available
|
|
*/
|
|
async cycleModel(direction: "forward" | "backward" = "forward"): Promise<ModelCycleResult | undefined> {
|
|
if (this._scopedModels.length > 0) {
|
|
return this._cycleScopedModel(direction);
|
|
}
|
|
return this._cycleAvailableModel(direction);
|
|
}
|
|
|
|
private async _cycleScopedModel(direction: "forward" | "backward"): Promise<ModelCycleResult | undefined> {
|
|
if (this._scopedModels.length <= 1) return undefined;
|
|
|
|
const currentModel = this.model;
|
|
let currentIndex = this._scopedModels.findIndex((sm) => modelsAreEqual(sm.model, currentModel));
|
|
|
|
if (currentIndex === -1) currentIndex = 0;
|
|
const len = this._scopedModels.length;
|
|
const nextIndex = direction === "forward" ? (currentIndex + 1) % len : (currentIndex - 1 + len) % len;
|
|
const next = this._scopedModels[nextIndex];
|
|
|
|
// Validate API key
|
|
const apiKey = await this._modelRegistry.getApiKey(next.model);
|
|
if (!apiKey) {
|
|
throw new Error(`No API key for ${next.model.provider}/${next.model.id}`);
|
|
}
|
|
|
|
// Apply model
|
|
this.agent.setModel(next.model);
|
|
this.sessionManager.appendModelChange(next.model.provider, next.model.id);
|
|
this.settingsManager.setDefaultModelAndProvider(next.model.provider, next.model.id);
|
|
|
|
// Apply thinking level (setThinkingLevel clamps to model capabilities)
|
|
this.setThinkingLevel(next.thinkingLevel);
|
|
|
|
return { model: next.model, thinkingLevel: this.thinkingLevel, isScoped: true };
|
|
}
|
|
|
|
private async _cycleAvailableModel(direction: "forward" | "backward"): Promise<ModelCycleResult | undefined> {
|
|
const availableModels = await this._modelRegistry.getAvailable();
|
|
if (availableModels.length <= 1) return undefined;
|
|
|
|
const currentModel = this.model;
|
|
let currentIndex = availableModels.findIndex((m) => modelsAreEqual(m, currentModel));
|
|
|
|
if (currentIndex === -1) currentIndex = 0;
|
|
const len = availableModels.length;
|
|
const nextIndex = direction === "forward" ? (currentIndex + 1) % len : (currentIndex - 1 + len) % len;
|
|
const nextModel = availableModels[nextIndex];
|
|
|
|
const apiKey = await this._modelRegistry.getApiKey(nextModel);
|
|
if (!apiKey) {
|
|
throw new Error(`No API key for ${nextModel.provider}/${nextModel.id}`);
|
|
}
|
|
|
|
this.agent.setModel(nextModel);
|
|
this.sessionManager.appendModelChange(nextModel.provider, nextModel.id);
|
|
this.settingsManager.setDefaultModelAndProvider(nextModel.provider, nextModel.id);
|
|
|
|
// Re-clamp thinking level for new model's capabilities
|
|
this.setThinkingLevel(this.thinkingLevel);
|
|
|
|
return { model: nextModel, thinkingLevel: this.thinkingLevel, isScoped: false };
|
|
}
|
|
|
|
/**
|
|
* Get all available models with valid API keys.
|
|
*/
|
|
async getAvailableModels(): Promise<Model<any>[]> {
|
|
return this._modelRegistry.getAvailable();
|
|
}
|
|
|
|
// =========================================================================
|
|
// Thinking Level Management
|
|
// =========================================================================
|
|
|
|
/**
|
|
* Set thinking level.
|
|
* Clamps to model capabilities: "off" if no reasoning, "high" if xhigh unsupported.
|
|
* Saves to session and settings.
|
|
*/
|
|
setThinkingLevel(level: ThinkingLevel): void {
|
|
let effectiveLevel = level;
|
|
if (!this.supportsThinking()) {
|
|
effectiveLevel = "off";
|
|
} else if (level === "xhigh" && !this.supportsXhighThinking()) {
|
|
effectiveLevel = "high";
|
|
}
|
|
this.agent.setThinkingLevel(effectiveLevel);
|
|
this.sessionManager.appendThinkingLevelChange(effectiveLevel);
|
|
this.settingsManager.setDefaultThinkingLevel(effectiveLevel);
|
|
}
|
|
|
|
/**
|
|
* Cycle to next thinking level.
|
|
* @returns New level, or undefined if model doesn't support thinking
|
|
*/
|
|
cycleThinkingLevel(): ThinkingLevel | undefined {
|
|
if (!this.supportsThinking()) return undefined;
|
|
|
|
const levels = this.getAvailableThinkingLevels();
|
|
const currentIndex = levels.indexOf(this.thinkingLevel);
|
|
const nextIndex = (currentIndex + 1) % levels.length;
|
|
const nextLevel = levels[nextIndex];
|
|
|
|
this.setThinkingLevel(nextLevel);
|
|
return nextLevel;
|
|
}
|
|
|
|
/**
|
|
* Get available thinking levels for current model.
|
|
*/
|
|
getAvailableThinkingLevels(): ThinkingLevel[] {
|
|
return this.supportsXhighThinking() ? THINKING_LEVELS_WITH_XHIGH : THINKING_LEVELS;
|
|
}
|
|
|
|
/**
|
|
* Check if current model supports xhigh thinking level.
|
|
*/
|
|
supportsXhighThinking(): boolean {
|
|
return this.model ? supportsXhigh(this.model) : false;
|
|
}
|
|
|
|
/**
|
|
* Check if current model supports thinking/reasoning.
|
|
*/
|
|
supportsThinking(): boolean {
|
|
return !!this.model?.reasoning;
|
|
}
|
|
|
|
// =========================================================================
|
|
// Queue Mode Management
|
|
// =========================================================================
|
|
|
|
/**
|
|
* Set message queue mode.
|
|
* Saves to settings.
|
|
*/
|
|
setQueueMode(mode: "all" | "one-at-a-time"): void {
|
|
this.agent.setQueueMode(mode);
|
|
this.settingsManager.setQueueMode(mode);
|
|
}
|
|
|
|
// =========================================================================
|
|
// Compaction
|
|
// =========================================================================
|
|
|
|
/**
|
|
* Manually compact the session context.
|
|
* Aborts current agent operation first.
|
|
* @param customInstructions Optional instructions for the compaction summary
|
|
*/
|
|
async compact(customInstructions?: string): Promise<CompactionResult> {
|
|
this._disconnectFromAgent();
|
|
await this.abort();
|
|
this._compactionAbortController = new AbortController();
|
|
|
|
try {
|
|
if (!this.model) {
|
|
throw new Error("No model selected");
|
|
}
|
|
|
|
const apiKey = await this._modelRegistry.getApiKey(this.model);
|
|
if (!apiKey) {
|
|
throw new Error(`No API key for ${this.model.provider}`);
|
|
}
|
|
|
|
const entries = this.sessionManager.getEntries();
|
|
const settings = this.settingsManager.getCompactionSettings();
|
|
|
|
const preparation = prepareCompaction(entries, settings);
|
|
if (!preparation) {
|
|
// Check why we can't compact
|
|
const lastEntry = entries[entries.length - 1];
|
|
if (lastEntry?.type === "compaction") {
|
|
throw new Error("Already compacted");
|
|
}
|
|
throw new Error("Nothing to compact (session too small)");
|
|
}
|
|
|
|
let hookCompaction: CompactionResult | undefined;
|
|
let fromHook = false;
|
|
|
|
if (this._hookRunner?.hasHandlers("session_before_compact")) {
|
|
// Get previous compactions, newest first
|
|
const previousCompactions = entries.filter((e): e is CompactionEntry => e.type === "compaction").reverse();
|
|
|
|
const result = (await this._hookRunner.emit({
|
|
type: "session_before_compact",
|
|
preparation,
|
|
previousCompactions,
|
|
customInstructions,
|
|
model: this.model,
|
|
signal: this._compactionAbortController.signal,
|
|
})) as SessionBeforeCompactResult | undefined;
|
|
|
|
if (result?.cancel) {
|
|
throw new Error("Compaction cancelled");
|
|
}
|
|
|
|
if (result?.compaction) {
|
|
hookCompaction = result.compaction;
|
|
fromHook = true;
|
|
}
|
|
}
|
|
|
|
let summary: string;
|
|
let firstKeptEntryId: string;
|
|
let tokensBefore: number;
|
|
let details: unknown;
|
|
|
|
if (hookCompaction) {
|
|
// Hook provided compaction content
|
|
summary = hookCompaction.summary;
|
|
firstKeptEntryId = hookCompaction.firstKeptEntryId;
|
|
tokensBefore = hookCompaction.tokensBefore;
|
|
details = hookCompaction.details;
|
|
} else {
|
|
// Generate compaction result
|
|
const result = await compact(
|
|
entries,
|
|
this.model,
|
|
settings,
|
|
apiKey,
|
|
this._compactionAbortController.signal,
|
|
customInstructions,
|
|
);
|
|
summary = result.summary;
|
|
firstKeptEntryId = result.firstKeptEntryId;
|
|
tokensBefore = result.tokensBefore;
|
|
details = result.details;
|
|
}
|
|
|
|
if (this._compactionAbortController.signal.aborted) {
|
|
throw new Error("Compaction cancelled");
|
|
}
|
|
|
|
this.sessionManager.appendCompaction(summary, firstKeptEntryId, tokensBefore, details);
|
|
const newEntries = this.sessionManager.getEntries();
|
|
const sessionContext = this.sessionManager.buildSessionContext();
|
|
this.agent.replaceMessages(sessionContext.messages);
|
|
|
|
// Get the saved compaction entry for the hook
|
|
const savedCompactionEntry = newEntries.find((e) => e.type === "compaction" && e.summary === summary) as
|
|
| CompactionEntry
|
|
| undefined;
|
|
|
|
if (this._hookRunner && savedCompactionEntry) {
|
|
await this._hookRunner.emit({
|
|
type: "session_compact",
|
|
compactionEntry: savedCompactionEntry,
|
|
fromHook,
|
|
});
|
|
}
|
|
|
|
return {
|
|
summary,
|
|
firstKeptEntryId,
|
|
tokensBefore,
|
|
details,
|
|
};
|
|
} finally {
|
|
this._compactionAbortController = undefined;
|
|
this._reconnectToAgent();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Cancel in-progress compaction (manual or auto).
|
|
*/
|
|
abortCompaction(): void {
|
|
this._compactionAbortController?.abort();
|
|
this._autoCompactionAbortController?.abort();
|
|
}
|
|
|
|
/**
|
|
* Cancel in-progress branch summarization.
|
|
*/
|
|
abortBranchSummary(): void {
|
|
this._branchSummaryAbortController?.abort();
|
|
}
|
|
|
|
/**
|
|
* Check if compaction is needed and run it.
|
|
* Called after agent_end and before prompt submission.
|
|
*
|
|
* Two cases:
|
|
* 1. Overflow: LLM returned context overflow error, remove error message from agent state, compact, auto-retry
|
|
* 2. Threshold: Context over threshold, compact, NO auto-retry (user continues manually)
|
|
*
|
|
* @param assistantMessage The assistant message to check
|
|
* @param skipAbortedCheck If false, include aborted messages (for pre-prompt check). Default: true
|
|
*/
|
|
private async _checkCompaction(assistantMessage: AssistantMessage, skipAbortedCheck = true): Promise<void> {
|
|
const settings = this.settingsManager.getCompactionSettings();
|
|
if (!settings.enabled) return;
|
|
|
|
// Skip if message was aborted (user cancelled) - unless skipAbortedCheck is false
|
|
if (skipAbortedCheck && assistantMessage.stopReason === "aborted") return;
|
|
|
|
const contextWindow = this.model?.contextWindow ?? 0;
|
|
|
|
// Case 1: Overflow - LLM returned context overflow error
|
|
if (isContextOverflow(assistantMessage, contextWindow)) {
|
|
// Remove the error message from agent state (it IS saved to session for history,
|
|
// but we don't want it in context for the retry)
|
|
const messages = this.agent.state.messages;
|
|
if (messages.length > 0 && messages[messages.length - 1].role === "assistant") {
|
|
this.agent.replaceMessages(messages.slice(0, -1));
|
|
}
|
|
await this._runAutoCompaction("overflow", true);
|
|
return;
|
|
}
|
|
|
|
// Case 2: Threshold - turn succeeded but context is getting large
|
|
// Skip if this was an error (non-overflow errors don't have usage data)
|
|
if (assistantMessage.stopReason === "error") return;
|
|
|
|
const contextTokens = calculateContextTokens(assistantMessage.usage);
|
|
if (shouldCompact(contextTokens, contextWindow, settings)) {
|
|
await this._runAutoCompaction("threshold", false);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Internal: Run auto-compaction with events.
|
|
*/
|
|
private async _runAutoCompaction(reason: "overflow" | "threshold", willRetry: boolean): Promise<void> {
|
|
const settings = this.settingsManager.getCompactionSettings();
|
|
|
|
this._emit({ type: "auto_compaction_start", reason });
|
|
this._autoCompactionAbortController = new AbortController();
|
|
|
|
try {
|
|
if (!this.model) {
|
|
this._emit({ type: "auto_compaction_end", result: undefined, aborted: false, willRetry: false });
|
|
return;
|
|
}
|
|
|
|
const apiKey = await this._modelRegistry.getApiKey(this.model);
|
|
if (!apiKey) {
|
|
this._emit({ type: "auto_compaction_end", result: undefined, aborted: false, willRetry: false });
|
|
return;
|
|
}
|
|
|
|
const entries = this.sessionManager.getEntries();
|
|
|
|
const preparation = prepareCompaction(entries, settings);
|
|
if (!preparation) {
|
|
this._emit({ type: "auto_compaction_end", result: undefined, aborted: false, willRetry: false });
|
|
return;
|
|
}
|
|
|
|
let hookCompaction: CompactionResult | undefined;
|
|
let fromHook = false;
|
|
|
|
if (this._hookRunner?.hasHandlers("session_before_compact")) {
|
|
// Get previous compactions, newest first
|
|
const previousCompactions = entries.filter((e): e is CompactionEntry => e.type === "compaction").reverse();
|
|
|
|
const hookResult = (await this._hookRunner.emit({
|
|
type: "session_before_compact",
|
|
preparation,
|
|
previousCompactions,
|
|
customInstructions: undefined,
|
|
model: this.model,
|
|
signal: this._autoCompactionAbortController.signal,
|
|
})) as SessionBeforeCompactResult | undefined;
|
|
|
|
if (hookResult?.cancel) {
|
|
this._emit({ type: "auto_compaction_end", result: undefined, aborted: true, willRetry: false });
|
|
return;
|
|
}
|
|
|
|
if (hookResult?.compaction) {
|
|
hookCompaction = hookResult.compaction;
|
|
fromHook = true;
|
|
}
|
|
}
|
|
|
|
let summary: string;
|
|
let firstKeptEntryId: string;
|
|
let tokensBefore: number;
|
|
let details: unknown;
|
|
|
|
if (hookCompaction) {
|
|
// Hook provided compaction content
|
|
summary = hookCompaction.summary;
|
|
firstKeptEntryId = hookCompaction.firstKeptEntryId;
|
|
tokensBefore = hookCompaction.tokensBefore;
|
|
details = hookCompaction.details;
|
|
} else {
|
|
// Generate compaction result
|
|
const compactResult = await compact(
|
|
entries,
|
|
this.model,
|
|
settings,
|
|
apiKey,
|
|
this._autoCompactionAbortController.signal,
|
|
);
|
|
summary = compactResult.summary;
|
|
firstKeptEntryId = compactResult.firstKeptEntryId;
|
|
tokensBefore = compactResult.tokensBefore;
|
|
details = compactResult.details;
|
|
}
|
|
|
|
if (this._autoCompactionAbortController.signal.aborted) {
|
|
this._emit({ type: "auto_compaction_end", result: undefined, aborted: true, willRetry: false });
|
|
return;
|
|
}
|
|
|
|
this.sessionManager.appendCompaction(summary, firstKeptEntryId, tokensBefore, details);
|
|
const newEntries = this.sessionManager.getEntries();
|
|
const sessionContext = this.sessionManager.buildSessionContext();
|
|
this.agent.replaceMessages(sessionContext.messages);
|
|
|
|
// Get the saved compaction entry for the hook
|
|
const savedCompactionEntry = newEntries.find((e) => e.type === "compaction" && e.summary === summary) as
|
|
| CompactionEntry
|
|
| undefined;
|
|
|
|
if (this._hookRunner && savedCompactionEntry) {
|
|
await this._hookRunner.emit({
|
|
type: "session_compact",
|
|
compactionEntry: savedCompactionEntry,
|
|
fromHook,
|
|
});
|
|
}
|
|
|
|
const result: CompactionResult = {
|
|
summary,
|
|
firstKeptEntryId,
|
|
tokensBefore,
|
|
details,
|
|
};
|
|
this._emit({ type: "auto_compaction_end", result, aborted: false, willRetry });
|
|
|
|
if (willRetry) {
|
|
const messages = this.agent.state.messages;
|
|
const lastMsg = messages[messages.length - 1];
|
|
if (lastMsg?.role === "assistant" && (lastMsg as AssistantMessage).stopReason === "error") {
|
|
this.agent.replaceMessages(messages.slice(0, -1));
|
|
}
|
|
|
|
setTimeout(() => {
|
|
this.agent.continue().catch(() => {});
|
|
}, 100);
|
|
}
|
|
} catch (error) {
|
|
this._emit({ type: "auto_compaction_end", result: undefined, aborted: false, willRetry: false });
|
|
|
|
if (reason === "overflow") {
|
|
throw new Error(
|
|
`Context overflow: ${error instanceof Error ? error.message : "compaction failed"}. Your input may be too large for the context window.`,
|
|
);
|
|
}
|
|
} finally {
|
|
this._autoCompactionAbortController = undefined;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Toggle auto-compaction setting.
|
|
*/
|
|
setAutoCompactionEnabled(enabled: boolean): void {
|
|
this.settingsManager.setCompactionEnabled(enabled);
|
|
}
|
|
|
|
/** Whether auto-compaction is enabled */
|
|
get autoCompactionEnabled(): boolean {
|
|
return this.settingsManager.getCompactionEnabled();
|
|
}
|
|
|
|
// =========================================================================
|
|
// Auto-Retry
|
|
// =========================================================================
|
|
|
|
/**
|
|
* Check if an error is retryable (overloaded, rate limit, server errors).
|
|
* Context overflow errors are NOT retryable (handled by compaction instead).
|
|
*/
|
|
private _isRetryableError(message: AssistantMessage): boolean {
|
|
if (message.stopReason !== "error" || !message.errorMessage) return false;
|
|
|
|
// Context overflow is handled by compaction, not retry
|
|
const contextWindow = this.model?.contextWindow ?? 0;
|
|
if (isContextOverflow(message, contextWindow)) return false;
|
|
|
|
const err = message.errorMessage;
|
|
// Match: overloaded_error, rate limit, 429, 500, 502, 503, 504, service unavailable, connection error
|
|
return /overloaded|rate.?limit|too many requests|429|500|502|503|504|service.?unavailable|server error|internal error|connection.?error/i.test(
|
|
err,
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Handle retryable errors with exponential backoff.
|
|
* @returns true if retry was initiated, false if max retries exceeded or disabled
|
|
*/
|
|
private async _handleRetryableError(message: AssistantMessage): Promise<boolean> {
|
|
const settings = this.settingsManager.getRetrySettings();
|
|
if (!settings.enabled) return false;
|
|
|
|
this._retryAttempt++;
|
|
|
|
// Create retry promise on first attempt so waitForRetry() can await it
|
|
if (this._retryAttempt === 1 && !this._retryPromise) {
|
|
this._retryPromise = new Promise((resolve) => {
|
|
this._retryResolve = resolve;
|
|
});
|
|
}
|
|
|
|
if (this._retryAttempt > settings.maxRetries) {
|
|
// Max retries exceeded, emit final failure and reset
|
|
this._emit({
|
|
type: "auto_retry_end",
|
|
success: false,
|
|
attempt: this._retryAttempt - 1,
|
|
finalError: message.errorMessage,
|
|
});
|
|
this._retryAttempt = 0;
|
|
this._resolveRetry(); // Resolve so waitForRetry() completes
|
|
return false;
|
|
}
|
|
|
|
const delayMs = settings.baseDelayMs * 2 ** (this._retryAttempt - 1);
|
|
|
|
this._emit({
|
|
type: "auto_retry_start",
|
|
attempt: this._retryAttempt,
|
|
maxAttempts: settings.maxRetries,
|
|
delayMs,
|
|
errorMessage: message.errorMessage || "Unknown error",
|
|
});
|
|
|
|
// Remove error message from agent state (keep in session for history)
|
|
const messages = this.agent.state.messages;
|
|
if (messages.length > 0 && messages[messages.length - 1].role === "assistant") {
|
|
this.agent.replaceMessages(messages.slice(0, -1));
|
|
}
|
|
|
|
// Wait with exponential backoff (abortable)
|
|
this._retryAbortController = new AbortController();
|
|
try {
|
|
await this._sleep(delayMs, this._retryAbortController.signal);
|
|
} catch {
|
|
// Aborted during sleep - emit end event so UI can clean up
|
|
const attempt = this._retryAttempt;
|
|
this._retryAttempt = 0;
|
|
this._retryAbortController = undefined;
|
|
this._emit({
|
|
type: "auto_retry_end",
|
|
success: false,
|
|
attempt,
|
|
finalError: "Retry cancelled",
|
|
});
|
|
this._resolveRetry();
|
|
return false;
|
|
}
|
|
this._retryAbortController = undefined;
|
|
|
|
// Retry via continue() - use setTimeout to break out of event handler chain
|
|
setTimeout(() => {
|
|
this.agent.continue().catch(() => {
|
|
// Retry failed - will be caught by next agent_end
|
|
});
|
|
}, 0);
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Sleep helper that respects abort signal.
|
|
*/
|
|
private _sleep(ms: number, signal?: AbortSignal): Promise<void> {
|
|
return new Promise((resolve, reject) => {
|
|
if (signal?.aborted) {
|
|
reject(new Error("Aborted"));
|
|
return;
|
|
}
|
|
|
|
const timeout = setTimeout(resolve, ms);
|
|
|
|
signal?.addEventListener("abort", () => {
|
|
clearTimeout(timeout);
|
|
reject(new Error("Aborted"));
|
|
});
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Cancel in-progress retry.
|
|
*/
|
|
abortRetry(): void {
|
|
this._retryAbortController?.abort();
|
|
this._retryAttempt = 0;
|
|
this._resolveRetry();
|
|
}
|
|
|
|
/**
|
|
* Wait for any in-progress retry to complete.
|
|
* Returns immediately if no retry is in progress.
|
|
*/
|
|
private async waitForRetry(): Promise<void> {
|
|
if (this._retryPromise) {
|
|
await this._retryPromise;
|
|
}
|
|
}
|
|
|
|
/** Whether auto-retry is currently in progress */
|
|
get isRetrying(): boolean {
|
|
return this._retryPromise !== undefined;
|
|
}
|
|
|
|
/** Whether auto-retry is enabled */
|
|
get autoRetryEnabled(): boolean {
|
|
return this.settingsManager.getRetryEnabled();
|
|
}
|
|
|
|
/**
|
|
* Toggle auto-retry setting.
|
|
*/
|
|
setAutoRetryEnabled(enabled: boolean): void {
|
|
this.settingsManager.setRetryEnabled(enabled);
|
|
}
|
|
|
|
// =========================================================================
|
|
// Bash Execution
|
|
// =========================================================================
|
|
|
|
/**
|
|
* Execute a bash command.
|
|
* Adds result to agent context and session.
|
|
* @param command The bash command to execute
|
|
* @param onChunk Optional streaming callback for output
|
|
*/
|
|
async executeBash(command: string, onChunk?: (chunk: string) => void): Promise<BashResult> {
|
|
this._bashAbortController = new AbortController();
|
|
|
|
try {
|
|
const result = await executeBashCommand(command, {
|
|
onChunk,
|
|
signal: this._bashAbortController.signal,
|
|
});
|
|
|
|
// Create and save message
|
|
const bashMessage: BashExecutionMessage = {
|
|
role: "bashExecution",
|
|
command,
|
|
output: result.output,
|
|
exitCode: result.exitCode,
|
|
cancelled: result.cancelled,
|
|
truncated: result.truncated,
|
|
fullOutputPath: result.fullOutputPath,
|
|
timestamp: Date.now(),
|
|
};
|
|
|
|
// If agent is streaming, defer adding to avoid breaking tool_use/tool_result ordering
|
|
if (this.isStreaming) {
|
|
// Queue for later - will be flushed on agent_end
|
|
this._pendingBashMessages.push(bashMessage);
|
|
} else {
|
|
// Add to agent state immediately
|
|
this.agent.appendMessage(bashMessage);
|
|
|
|
// Save to session
|
|
this.sessionManager.appendMessage(bashMessage);
|
|
}
|
|
|
|
return result;
|
|
} finally {
|
|
this._bashAbortController = undefined;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Cancel running bash command.
|
|
*/
|
|
abortBash(): void {
|
|
this._bashAbortController?.abort();
|
|
}
|
|
|
|
/** Whether a bash command is currently running */
|
|
get isBashRunning(): boolean {
|
|
return this._bashAbortController !== undefined;
|
|
}
|
|
|
|
/** Whether there are pending bash messages waiting to be flushed */
|
|
get hasPendingBashMessages(): boolean {
|
|
return this._pendingBashMessages.length > 0;
|
|
}
|
|
|
|
/**
|
|
* Flush pending bash messages to agent state and session.
|
|
* Called after agent turn completes to maintain proper message ordering.
|
|
*/
|
|
private _flushPendingBashMessages(): void {
|
|
if (this._pendingBashMessages.length === 0) return;
|
|
|
|
for (const bashMessage of this._pendingBashMessages) {
|
|
// Add to agent state
|
|
this.agent.appendMessage(bashMessage);
|
|
|
|
// Save to session
|
|
this.sessionManager.appendMessage(bashMessage);
|
|
}
|
|
|
|
this._pendingBashMessages = [];
|
|
}
|
|
|
|
// =========================================================================
|
|
// Session Management
|
|
// =========================================================================
|
|
|
|
/**
|
|
* Switch to a different session file.
|
|
* Aborts current operation, loads messages, restores model/thinking.
|
|
* Listeners are preserved and will continue receiving events.
|
|
* @returns true if switch completed, false if cancelled by hook
|
|
*/
|
|
async switchSession(sessionPath: string): Promise<boolean> {
|
|
const previousSessionFile = this.sessionManager.getSessionFile();
|
|
|
|
// Emit session_before_switch event (can be cancelled)
|
|
if (this._hookRunner?.hasHandlers("session_before_switch")) {
|
|
const result = (await this._hookRunner.emit({
|
|
type: "session_before_switch",
|
|
targetSessionFile: sessionPath,
|
|
})) as SessionBeforeSwitchResult | undefined;
|
|
|
|
if (result?.cancel) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
this._disconnectFromAgent();
|
|
await this.abort();
|
|
this._queuedMessages = [];
|
|
|
|
// Set new session
|
|
this.sessionManager.setSessionFile(sessionPath);
|
|
|
|
// Reload messages
|
|
const sessionContext = this.sessionManager.buildSessionContext();
|
|
|
|
// Emit session_switch event to hooks
|
|
if (this._hookRunner) {
|
|
await this._hookRunner.emit({
|
|
type: "session_switch",
|
|
previousSessionFile,
|
|
});
|
|
}
|
|
|
|
// Emit session event to custom tools
|
|
await this._emitToolSessionEvent("switch", previousSessionFile);
|
|
|
|
this.agent.replaceMessages(sessionContext.messages);
|
|
|
|
// Restore model if saved
|
|
if (sessionContext.model) {
|
|
const availableModels = await this._modelRegistry.getAvailable();
|
|
const match = availableModels.find(
|
|
(m) => m.provider === sessionContext.model!.provider && m.id === sessionContext.model!.modelId,
|
|
);
|
|
if (match) {
|
|
this.agent.setModel(match);
|
|
}
|
|
}
|
|
|
|
// Restore thinking level if saved (setThinkingLevel clamps to model capabilities)
|
|
if (sessionContext.thinkingLevel) {
|
|
this.setThinkingLevel(sessionContext.thinkingLevel as ThinkingLevel);
|
|
}
|
|
|
|
this._reconnectToAgent();
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Create a branch from a specific entry index.
|
|
* Emits before_branch/branch session events to hooks.
|
|
*
|
|
* @param entryIndex Index into session entries to branch from
|
|
* @returns Object with:
|
|
* - selectedText: The text of the selected user message (for editor pre-fill)
|
|
* - cancelled: True if a hook cancelled the branch
|
|
*/
|
|
async branch(entryIndex: number): Promise<{ selectedText: string; cancelled: boolean }> {
|
|
const previousSessionFile = this.sessionFile;
|
|
const entries = this.sessionManager.getEntries();
|
|
const selectedEntry = entries[entryIndex];
|
|
|
|
if (!selectedEntry || selectedEntry.type !== "message" || selectedEntry.message.role !== "user") {
|
|
throw new Error("Invalid entry index for branching");
|
|
}
|
|
|
|
const selectedText = this._extractUserMessageText(selectedEntry.message.content);
|
|
|
|
let skipConversationRestore = false;
|
|
|
|
// Emit session_before_branch event (can be cancelled)
|
|
if (this._hookRunner?.hasHandlers("session_before_branch")) {
|
|
const result = (await this._hookRunner.emit({
|
|
type: "session_before_branch",
|
|
entryIndex: entryIndex,
|
|
})) as SessionBeforeBranchResult | undefined;
|
|
|
|
if (result?.cancel) {
|
|
return { selectedText, cancelled: true };
|
|
}
|
|
skipConversationRestore = result?.skipConversationRestore ?? false;
|
|
}
|
|
|
|
if (!selectedEntry.parentId) {
|
|
this.sessionManager.newSession();
|
|
} else {
|
|
this.sessionManager.createBranchedSession(selectedEntry.parentId);
|
|
}
|
|
|
|
// Reload messages from entries (works for both file and in-memory mode)
|
|
const sessionContext = this.sessionManager.buildSessionContext();
|
|
|
|
// Emit session_branch event to hooks (after branch completes)
|
|
if (this._hookRunner) {
|
|
await this._hookRunner.emit({
|
|
type: "session_branch",
|
|
previousSessionFile,
|
|
});
|
|
}
|
|
|
|
// Emit session event to custom tools (with reason "branch")
|
|
await this._emitToolSessionEvent("branch", previousSessionFile);
|
|
|
|
if (!skipConversationRestore) {
|
|
this.agent.replaceMessages(sessionContext.messages);
|
|
}
|
|
|
|
return { selectedText, cancelled: false };
|
|
}
|
|
|
|
// =========================================================================
|
|
// Tree Navigation
|
|
// =========================================================================
|
|
|
|
/**
|
|
* Navigate to a different node in the session tree.
|
|
* Unlike branch() which creates a new session file, this stays in the same file.
|
|
*
|
|
* @param targetId The entry ID to navigate to
|
|
* @param options.summarize Whether user wants to summarize abandoned branch
|
|
* @param options.customInstructions Custom instructions for summarizer
|
|
* @returns Result with editorText (if user message) and cancelled status
|
|
*/
|
|
async navigateTree(
|
|
targetId: string,
|
|
options: { summarize?: boolean; customInstructions?: string } = {},
|
|
): Promise<{ editorText?: string; cancelled: boolean; aborted?: boolean }> {
|
|
const oldLeafId = this.sessionManager.getLeafId();
|
|
|
|
// No-op if already at target
|
|
if (targetId === oldLeafId) {
|
|
return { cancelled: false };
|
|
}
|
|
|
|
// Model required for summarization
|
|
if (options.summarize && !this.model) {
|
|
throw new Error("No model available for summarization");
|
|
}
|
|
|
|
const targetEntry = this.sessionManager.getEntry(targetId);
|
|
if (!targetEntry) {
|
|
throw new Error(`Entry ${targetId} not found`);
|
|
}
|
|
|
|
// Find common ancestor (if oldLeafId is null, there's no old path)
|
|
const oldPath = oldLeafId ? new Set(this.sessionManager.getPath(oldLeafId).map((e) => e.id)) : new Set<string>();
|
|
const targetPath = this.sessionManager.getPath(targetId);
|
|
let commonAncestorId: string | null = null;
|
|
for (const entry of targetPath) {
|
|
if (oldPath.has(entry.id)) {
|
|
commonAncestorId = entry.id;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Collect entries to summarize (old leaf back to common ancestor, stop at compaction)
|
|
const entriesToSummarize: SessionEntry[] = [];
|
|
if (options.summarize && oldLeafId) {
|
|
let current: string | null = oldLeafId;
|
|
while (current && current !== commonAncestorId) {
|
|
const entry = this.sessionManager.getEntry(current);
|
|
if (!entry) break;
|
|
if (entry.type === "compaction") break;
|
|
entriesToSummarize.push(entry);
|
|
current = entry.parentId;
|
|
}
|
|
entriesToSummarize.reverse(); // Chronological order
|
|
}
|
|
|
|
// Prepare event data
|
|
const preparation: TreePreparation = {
|
|
targetId,
|
|
oldLeafId,
|
|
commonAncestorId,
|
|
entriesToSummarize,
|
|
userWantsSummary: options.summarize ?? false,
|
|
};
|
|
|
|
// Set up abort controller for summarization
|
|
this._branchSummaryAbortController = new AbortController();
|
|
let hookSummary: { summary: string; details?: unknown } | undefined;
|
|
let fromHook = false;
|
|
|
|
// Emit session_before_tree event
|
|
if (this._hookRunner?.hasHandlers("session_before_tree")) {
|
|
const result = (await this._hookRunner.emit({
|
|
type: "session_before_tree",
|
|
preparation,
|
|
model: this.model!, // Checked above if summarize is true
|
|
signal: this._branchSummaryAbortController.signal,
|
|
})) as SessionBeforeTreeResult | undefined;
|
|
|
|
if (result?.cancel) {
|
|
return { cancelled: true };
|
|
}
|
|
|
|
if (result?.summary && options.summarize) {
|
|
hookSummary = result.summary;
|
|
fromHook = true;
|
|
}
|
|
}
|
|
|
|
// Run default summarizer if needed
|
|
let summaryText: string | undefined;
|
|
if (options.summarize && entriesToSummarize.length > 0 && !hookSummary) {
|
|
const result = await this._generateBranchSummary(
|
|
entriesToSummarize,
|
|
options.customInstructions,
|
|
this._branchSummaryAbortController.signal,
|
|
);
|
|
this._branchSummaryAbortController = undefined;
|
|
if (result.aborted) {
|
|
return { cancelled: true, aborted: true };
|
|
}
|
|
if (result.error) {
|
|
throw new Error(result.error);
|
|
}
|
|
summaryText = result.summary;
|
|
} else if (hookSummary) {
|
|
summaryText = hookSummary.summary;
|
|
}
|
|
|
|
// Determine the new leaf position based on target type
|
|
let newLeafId: string | null;
|
|
let editorText: string | undefined;
|
|
|
|
if (targetEntry.type === "message" && targetEntry.message.role === "user") {
|
|
// User message: leaf = parent (null if root), text goes to editor
|
|
newLeafId = targetEntry.parentId;
|
|
editorText = this._extractUserMessageText(targetEntry.message.content);
|
|
} else if (targetEntry.type === "custom_message") {
|
|
// Custom message: leaf = parent (null if root), text goes to editor
|
|
newLeafId = targetEntry.parentId;
|
|
editorText =
|
|
typeof targetEntry.content === "string"
|
|
? targetEntry.content
|
|
: targetEntry.content
|
|
.filter((c): c is { type: "text"; text: string } => c.type === "text")
|
|
.map((c) => c.text)
|
|
.join("");
|
|
} else {
|
|
// Non-user message: leaf = selected node
|
|
newLeafId = targetId;
|
|
}
|
|
|
|
// Switch leaf (with or without summary)
|
|
// Summary is attached at the navigation target position (newLeafId), not the old branch
|
|
let summaryEntry: BranchSummaryEntry | undefined;
|
|
if (summaryText) {
|
|
// Create summary at target position (can be null for root)
|
|
const summaryId = this.sessionManager.branchWithSummary(newLeafId, summaryText);
|
|
summaryEntry = this.sessionManager.getEntry(summaryId) as BranchSummaryEntry;
|
|
} else if (newLeafId === null) {
|
|
// No summary, navigating to root - reset leaf
|
|
this.sessionManager.resetLeaf();
|
|
} else {
|
|
// No summary, navigating to non-root
|
|
this.sessionManager.branch(newLeafId);
|
|
}
|
|
|
|
// Update agent state
|
|
const sessionContext = this.sessionManager.buildSessionContext();
|
|
this.agent.replaceMessages(sessionContext.messages);
|
|
|
|
// Emit session_tree event
|
|
if (this._hookRunner) {
|
|
await this._hookRunner.emit({
|
|
type: "session_tree",
|
|
newLeafId: this.sessionManager.getLeafId(),
|
|
oldLeafId,
|
|
summaryEntry,
|
|
fromHook: summaryText ? fromHook : undefined,
|
|
});
|
|
}
|
|
|
|
// Emit to custom tools
|
|
await this._emitToolSessionEvent("tree", this.sessionFile);
|
|
|
|
this._branchSummaryAbortController = undefined;
|
|
return { editorText, cancelled: false };
|
|
}
|
|
|
|
/**
|
|
* Generate a summary of abandoned branch entries.
|
|
*/
|
|
private async _generateBranchSummary(
|
|
entries: SessionEntry[],
|
|
customInstructions: string | undefined,
|
|
signal: AbortSignal,
|
|
): Promise<{ summary?: string; aborted?: boolean; error?: string }> {
|
|
// Convert entries to messages for summarization
|
|
const messages: Array<{ role: string; content: string }> = [];
|
|
for (const entry of entries) {
|
|
if (entry.type === "message") {
|
|
const text = this._extractMessageText(entry.message);
|
|
if (text) {
|
|
messages.push({ role: entry.message.role, content: text });
|
|
}
|
|
} else if (entry.type === "custom_message") {
|
|
const text =
|
|
typeof entry.content === "string"
|
|
? entry.content
|
|
: entry.content
|
|
.filter((c): c is { type: "text"; text: string } => c.type === "text")
|
|
.map((c) => c.text)
|
|
.join("");
|
|
if (text) {
|
|
messages.push({ role: "user", content: text });
|
|
}
|
|
} else if (entry.type === "branch_summary") {
|
|
messages.push({ role: "system", content: `[Previous branch summary: ${entry.summary}]` });
|
|
}
|
|
}
|
|
|
|
if (messages.length === 0) {
|
|
return { summary: "No content to summarize" };
|
|
}
|
|
|
|
// Build prompt for summarization
|
|
const conversationText = messages.map((m) => `${m.role}: ${m.content}`).join("\n\n");
|
|
const instructions = customInstructions
|
|
? `${customInstructions}\n\n`
|
|
: "Summarize this conversation branch concisely, capturing key decisions, actions taken, and outcomes.\n\n";
|
|
|
|
const prompt = `${instructions}Conversation:\n${conversationText}`;
|
|
|
|
// Get API key for current model (model is checked in navigateTree before calling this)
|
|
const model = this.model!;
|
|
const apiKey = await this._modelRegistry.getApiKey(model);
|
|
if (!apiKey) {
|
|
throw new Error(`No API key for ${model.provider}`);
|
|
}
|
|
|
|
// Call LLM for summarization
|
|
const { complete } = await import("@mariozechner/pi-ai");
|
|
const response = await complete(
|
|
model,
|
|
{
|
|
messages: [
|
|
{
|
|
role: "user",
|
|
content: [{ type: "text", text: prompt }],
|
|
timestamp: Date.now(),
|
|
},
|
|
],
|
|
},
|
|
{ apiKey, signal, maxTokens: 1024 },
|
|
);
|
|
|
|
// Check if aborted or errored
|
|
if (response.stopReason === "aborted") {
|
|
return { aborted: true };
|
|
}
|
|
if (response.stopReason === "error") {
|
|
return { error: response.errorMessage || "Summarization failed" };
|
|
}
|
|
|
|
const summary = response.content
|
|
.filter((c): c is { type: "text"; text: string } => c.type === "text")
|
|
.map((c) => c.text)
|
|
.join("\n");
|
|
|
|
return { summary: summary || "No summary generated" };
|
|
}
|
|
|
|
/**
|
|
* Extract text content from any message type.
|
|
*/
|
|
private _extractMessageText(message: any): string {
|
|
if (!message.content) return "";
|
|
if (typeof message.content === "string") return message.content;
|
|
if (Array.isArray(message.content)) {
|
|
return message.content
|
|
.filter((c: any) => c.type === "text")
|
|
.map((c: any) => c.text)
|
|
.join("");
|
|
}
|
|
return "";
|
|
}
|
|
|
|
/**
|
|
* Get all user messages from session for branch selector.
|
|
*/
|
|
getUserMessagesForBranching(): Array<{ entryIndex: number; text: string }> {
|
|
const entries = this.sessionManager.getEntries();
|
|
const result: Array<{ entryIndex: number; text: string }> = [];
|
|
|
|
for (let i = 0; i < entries.length; i++) {
|
|
const entry = entries[i];
|
|
if (entry.type !== "message") continue;
|
|
if (entry.message.role !== "user") continue;
|
|
|
|
const text = this._extractUserMessageText(entry.message.content);
|
|
if (text) {
|
|
result.push({ entryIndex: i, text });
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
private _extractUserMessageText(content: string | Array<{ type: string; text?: string }>): string {
|
|
if (typeof content === "string") return content;
|
|
if (Array.isArray(content)) {
|
|
return content
|
|
.filter((c): c is { type: "text"; text: string } => c.type === "text")
|
|
.map((c) => c.text)
|
|
.join("");
|
|
}
|
|
return "";
|
|
}
|
|
|
|
/**
|
|
* Get session statistics.
|
|
*/
|
|
getSessionStats(): SessionStats {
|
|
const state = this.state;
|
|
const userMessages = state.messages.filter((m) => m.role === "user").length;
|
|
const assistantMessages = state.messages.filter((m) => m.role === "assistant").length;
|
|
const toolResults = state.messages.filter((m) => m.role === "toolResult").length;
|
|
|
|
let toolCalls = 0;
|
|
let totalInput = 0;
|
|
let totalOutput = 0;
|
|
let totalCacheRead = 0;
|
|
let totalCacheWrite = 0;
|
|
let totalCost = 0;
|
|
|
|
for (const message of state.messages) {
|
|
if (message.role === "assistant") {
|
|
const assistantMsg = message as AssistantMessage;
|
|
toolCalls += assistantMsg.content.filter((c) => c.type === "toolCall").length;
|
|
totalInput += assistantMsg.usage.input;
|
|
totalOutput += assistantMsg.usage.output;
|
|
totalCacheRead += assistantMsg.usage.cacheRead;
|
|
totalCacheWrite += assistantMsg.usage.cacheWrite;
|
|
totalCost += assistantMsg.usage.cost.total;
|
|
}
|
|
}
|
|
|
|
return {
|
|
sessionFile: this.sessionFile,
|
|
sessionId: this.sessionId,
|
|
userMessages,
|
|
assistantMessages,
|
|
toolCalls,
|
|
toolResults,
|
|
totalMessages: state.messages.length,
|
|
tokens: {
|
|
input: totalInput,
|
|
output: totalOutput,
|
|
cacheRead: totalCacheRead,
|
|
cacheWrite: totalCacheWrite,
|
|
total: totalInput + totalOutput + totalCacheRead + totalCacheWrite,
|
|
},
|
|
cost: totalCost,
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Export session to HTML.
|
|
* @param outputPath Optional output path (defaults to session directory)
|
|
* @returns Path to exported file
|
|
*/
|
|
exportToHtml(outputPath?: string): string {
|
|
const themeName = this.settingsManager.getTheme();
|
|
return exportSessionToHtml(this.sessionManager, this.state, { outputPath, themeName });
|
|
}
|
|
|
|
// =========================================================================
|
|
// Utilities
|
|
// =========================================================================
|
|
|
|
/**
|
|
* Get text content of last assistant message.
|
|
* Useful for /copy command.
|
|
* @returns Text content, or undefined if no assistant message exists
|
|
*/
|
|
getLastAssistantText(): string | undefined {
|
|
const lastAssistant = this.messages
|
|
.slice()
|
|
.reverse()
|
|
.find((m) => {
|
|
if (m.role !== "assistant") return false;
|
|
const msg = m as AssistantMessage;
|
|
// Skip aborted messages with no content
|
|
if (msg.stopReason === "aborted" && msg.content.length === 0) return false;
|
|
return true;
|
|
});
|
|
|
|
if (!lastAssistant) return undefined;
|
|
|
|
let text = "";
|
|
for (const content of (lastAssistant as AssistantMessage).content) {
|
|
if (content.type === "text") {
|
|
text += content.text;
|
|
}
|
|
}
|
|
|
|
return text.trim() || undefined;
|
|
}
|
|
|
|
// =========================================================================
|
|
// Hook System
|
|
// =========================================================================
|
|
|
|
/**
|
|
* Check if hooks have handlers for a specific event type.
|
|
*/
|
|
hasHookHandlers(eventType: string): boolean {
|
|
return this._hookRunner?.hasHandlers(eventType) ?? false;
|
|
}
|
|
|
|
/**
|
|
* Get the hook runner (for setting UI context and error handlers).
|
|
*/
|
|
get hookRunner(): HookRunner | undefined {
|
|
return this._hookRunner;
|
|
}
|
|
|
|
/**
|
|
* Get custom tools (for setting UI context in modes).
|
|
*/
|
|
get customTools(): LoadedCustomTool[] {
|
|
return this._customTools;
|
|
}
|
|
|
|
/**
|
|
* Emit session event to all custom tools.
|
|
* Called on session switch, branch, and clear.
|
|
*/
|
|
private async _emitToolSessionEvent(
|
|
reason: ToolSessionEvent["reason"],
|
|
previousSessionFile: string | undefined,
|
|
): Promise<void> {
|
|
const event: ToolSessionEvent = {
|
|
entries: this.sessionManager.getEntries(),
|
|
sessionFile: this.sessionFile,
|
|
previousSessionFile,
|
|
reason,
|
|
};
|
|
for (const { tool } of this._customTools) {
|
|
if (tool.onSession) {
|
|
try {
|
|
await tool.onSession(event);
|
|
} catch (_err) {
|
|
// Silently ignore tool errors during session events
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|