can1357
1761 lines
53 KiB
TypeScript
1761 lines
53 KiB
TypeScript
import { basename, join, resolve } from "node:path";
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import type { AgentMessage } from "@oh-my-pi/pi-agent-core";
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import type { ImageContent, Message, TextContent, Usage } from "@oh-my-pi/pi-ai";
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import { nanoid } from "nanoid";
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import { getAgentDir as getDefaultAgentDir } from "../config";
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import { resizeImage } from "../utils/image-resize";
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import { logger } from "./logger";
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import {
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type BashExecutionMessage,
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type CustomMessage,
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createBranchSummaryMessage,
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createCompactionSummaryMessage,
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createCustomMessage,
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type FileMentionMessage,
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type HookMessage,
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} from "./messages";
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import type { SessionStorage, SessionStorageWriter } from "./session-storage";
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import { FileSessionStorage, MemorySessionStorage } from "./session-storage";
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export const CURRENT_SESSION_VERSION = 3;
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export interface SessionHeader {
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type: "session";
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version?: number; // v1 sessions don't have this
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id: string;
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title?: string; // Auto-generated title from first message
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timestamp: string;
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cwd: string;
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parentSession?: string;
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}
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export interface NewSessionOptions {
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parentSession?: string;
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}
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export interface SessionEntryBase {
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type: string;
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id: string;
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parentId: string | null;
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timestamp: string;
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}
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export interface SessionMessageEntry extends SessionEntryBase {
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type: "message";
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message: AgentMessage;
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}
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export interface ThinkingLevelChangeEntry extends SessionEntryBase {
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type: "thinking_level_change";
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thinkingLevel: string;
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}
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export interface ModelChangeEntry extends SessionEntryBase {
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type: "model_change";
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/** Model in "provider/modelId" format */
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model: string;
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/** Role: "default", "smol", "slow", etc. Undefined treated as "default" */
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role?: string;
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}
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export interface CompactionEntry<T = unknown> extends SessionEntryBase {
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type: "compaction";
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summary: string;
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firstKeptEntryId: string;
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tokensBefore: number;
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/** Extension-specific data (e.g., ArtifactIndex, version markers for structured compaction) */
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details?: T;
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/** True if generated by an extension, undefined/false if pi-generated (backward compatible) */
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fromExtension?: boolean;
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}
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export interface BranchSummaryEntry<T = unknown> extends SessionEntryBase {
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type: "branch_summary";
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fromId: string;
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summary: string;
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/** Extension-specific data (not sent to LLM) */
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details?: T;
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/** True if generated by an extension, false if pi-generated */
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fromExtension?: boolean;
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}
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/**
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* Custom entry for extensions to store extension-specific data in the session.
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* Use customType to identify your extension's entries.
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*
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* Purpose: Persist extension state across session reloads. On reload, extensions can
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* scan entries for their customType and reconstruct internal state.
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*
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* Does NOT participate in LLM context (ignored by buildSessionContext).
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* For injecting content into context, see CustomMessageEntry.
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*/
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export interface CustomEntry<T = unknown> extends SessionEntryBase {
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type: "custom";
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customType: string;
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data?: T;
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}
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/** Label entry for user-defined bookmarks/markers on entries. */
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export interface LabelEntry extends SessionEntryBase {
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type: "label";
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targetId: string;
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label: string | undefined;
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}
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/** TTSR injection entry - tracks which time-traveling rules have been injected this session. */
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export interface TtsrInjectionEntry extends SessionEntryBase {
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type: "ttsr_injection";
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/** Names of rules that were injected */
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injectedRules: string[];
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}
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/**
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* Custom message entry for extensions to inject messages into LLM context.
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* Use customType to identify your extension's entries.
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*
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* Unlike CustomEntry, this DOES participate in LLM context.
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* The content is converted to a user message in buildSessionContext().
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* Use details for extension-specific metadata (not sent to LLM).
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*
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* display controls TUI rendering:
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* - false: hidden entirely
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* - true: rendered with distinct styling (different from user messages)
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*/
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export interface CustomMessageEntry<T = unknown> extends SessionEntryBase {
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type: "custom_message";
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customType: string;
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content: string | (TextContent | ImageContent)[];
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details?: T;
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display: boolean;
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}
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/** Session entry - has id/parentId for tree structure (returned by "read" methods in SessionManager) */
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export type SessionEntry =
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| SessionMessageEntry
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| ThinkingLevelChangeEntry
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| ModelChangeEntry
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| CompactionEntry
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| BranchSummaryEntry
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| CustomEntry
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| CustomMessageEntry
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| LabelEntry
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| TtsrInjectionEntry;
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/** Raw file entry (includes header) */
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export type FileEntry = SessionHeader | SessionEntry;
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/** Tree node for getTree() - defensive copy of session structure */
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export interface SessionTreeNode {
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entry: SessionEntry;
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children: SessionTreeNode[];
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/** Resolved label for this entry, if any */
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label?: string;
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}
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export interface SessionContext {
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messages: AgentMessage[];
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thinkingLevel: string;
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/** Model roles: { default: "provider/modelId", small: "provider/modelId", ... } */
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models: Record<string, string>;
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/** Names of TTSR rules that have been injected this session */
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injectedTtsrRules: string[];
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}
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export interface SessionInfo {
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path: string;
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id: string;
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title?: string;
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created: Date;
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modified: Date;
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messageCount: number;
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firstMessage: string;
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allMessagesText: string;
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}
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export type ReadonlySessionManager = Pick<
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SessionManager,
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| "getCwd"
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| "getSessionDir"
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| "getSessionId"
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| "getSessionFile"
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| "getLeafId"
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| "getLeafEntry"
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| "getEntry"
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| "getLabel"
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| "getBranch"
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| "getHeader"
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| "getEntries"
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| "getTree"
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| "getUsageStatistics"
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>;
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/** Generate a unique short ID (8 hex chars, collision-checked) */
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function generateId(byId: { has(id: string): boolean }): string {
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for (let i = 0; i < 100; i++) {
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const id = nanoid(8);
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if (!byId.has(id)) return id;
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}
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return nanoid(); // fallback to full nanoid
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}
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/** Migrate v1 → v2: add id/parentId tree structure. Mutates in place. */
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function migrateV1ToV2(entries: FileEntry[]): void {
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const ids = new Set<string>();
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let prevId: string | null = null;
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for (const entry of entries) {
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if (entry.type === "session") {
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entry.version = 2;
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continue;
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}
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entry.id = generateId(ids);
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entry.parentId = prevId;
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prevId = entry.id;
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// Convert firstKeptEntryIndex to firstKeptEntryId for compaction
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if (entry.type === "compaction") {
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const comp = entry as CompactionEntry & { firstKeptEntryIndex?: number };
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if (typeof comp.firstKeptEntryIndex === "number") {
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const targetEntry = entries[comp.firstKeptEntryIndex];
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if (targetEntry && targetEntry.type !== "session") {
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comp.firstKeptEntryId = targetEntry.id;
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}
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delete comp.firstKeptEntryIndex;
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}
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}
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}
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}
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/** Migrate v2 → v3: rename hookMessage role to custom. Mutates in place. */
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function migrateV2ToV3(entries: FileEntry[]): void {
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for (const entry of entries) {
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if (entry.type === "session") {
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entry.version = 3;
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continue;
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}
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if (entry.type === "message") {
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const msg = entry.message as { role?: string };
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if (msg.role === "hookMessage") {
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(entry.message as { role: string }).role = "custom";
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}
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}
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}
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}
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/**
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* Run all necessary migrations to bring entries to current version.
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* Mutates entries in place. Returns true if any migration was applied.
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*/
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function migrateToCurrentVersion(entries: FileEntry[]): boolean {
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const header = entries.find((e) => e.type === "session") as SessionHeader | undefined;
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const version = header?.version ?? 1;
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if (version >= CURRENT_SESSION_VERSION) return false;
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if (version < 2) migrateV1ToV2(entries);
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if (version < 3) migrateV2ToV3(entries);
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return true;
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}
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/** Exported for testing */
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export function migrateSessionEntries(entries: FileEntry[]): void {
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migrateToCurrentVersion(entries);
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}
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/** Exported for compaction.test.ts */
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export function parseSessionEntries(content: string): FileEntry[] {
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const entries: FileEntry[] = [];
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const lines = content.trim().split("\n");
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for (const line of lines) {
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if (!line.trim()) continue;
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try {
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const entry = JSON.parse(line) as FileEntry;
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entries.push(entry);
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} catch {
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// Skip malformed lines
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}
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}
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return entries;
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}
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export function getLatestCompactionEntry(entries: SessionEntry[]): CompactionEntry | null {
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for (let i = entries.length - 1; i >= 0; i--) {
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if (entries[i].type === "compaction") {
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return entries[i] as CompactionEntry;
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}
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}
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return null;
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}
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function toError(value: unknown): Error {
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return value instanceof Error ? value : new Error(String(value));
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}
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/**
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* Build the session context from entries using tree traversal.
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* If leafId is provided, walks from that entry to root.
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* Handles compaction and branch summaries along the path.
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*/
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export function buildSessionContext(
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entries: SessionEntry[],
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leafId?: string | null,
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byId?: Map<string, SessionEntry>,
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): SessionContext {
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// Build uuid index if not available
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if (!byId) {
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byId = new Map<string, SessionEntry>();
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for (const entry of entries) {
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byId.set(entry.id, entry);
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}
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}
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// Find leaf
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let leaf: SessionEntry | undefined;
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if (leafId === null) {
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// Explicitly null - return no messages (navigated to before first entry)
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return { messages: [], thinkingLevel: "off", models: {}, injectedTtsrRules: [] };
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}
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if (leafId) {
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leaf = byId.get(leafId);
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}
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if (!leaf) {
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// Fallback to last entry (when leafId is undefined)
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leaf = entries[entries.length - 1];
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}
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if (!leaf) {
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return { messages: [], thinkingLevel: "off", models: {}, injectedTtsrRules: [] };
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}
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// Walk from leaf to root, collecting path
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const path: SessionEntry[] = [];
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let current: SessionEntry | undefined = leaf;
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while (current) {
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path.unshift(current);
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current = current.parentId ? byId.get(current.parentId) : undefined;
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}
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// Extract settings and find compaction
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let thinkingLevel = "off";
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const models: Record<string, string> = {};
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let compaction: CompactionEntry | null = null;
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const injectedTtsrRulesSet = new Set<string>();
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for (const entry of path) {
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if (entry.type === "thinking_level_change") {
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thinkingLevel = entry.thinkingLevel;
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} else if (entry.type === "model_change") {
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// New format: { model: "provider/id", role?: string }
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if (entry.model) {
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const role = entry.role ?? "default";
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models[role] = entry.model;
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}
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} else if (entry.type === "message" && entry.message.role === "assistant") {
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// Infer default model from assistant messages
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models.default = `${entry.message.provider}/${entry.message.model}`;
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} else if (entry.type === "compaction") {
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compaction = entry;
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} else if (entry.type === "ttsr_injection") {
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// Collect injected TTSR rule names
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for (const ruleName of entry.injectedRules) {
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injectedTtsrRulesSet.add(ruleName);
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}
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}
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}
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const injectedTtsrRules = Array.from(injectedTtsrRulesSet);
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// Build messages and collect corresponding entries
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// When there's a compaction, we need to:
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// 1. Emit summary first (entry = compaction)
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// 2. Emit kept messages (from firstKeptEntryId up to compaction)
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// 3. Emit messages after compaction
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const messages: AgentMessage[] = [];
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const appendMessage = (entry: SessionEntry) => {
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if (entry.type === "message") {
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messages.push(entry.message);
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} else if (entry.type === "custom_message") {
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messages.push(
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createCustomMessage(entry.customType, entry.content, entry.display, entry.details, entry.timestamp),
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);
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} else if (entry.type === "branch_summary" && entry.summary) {
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messages.push(createBranchSummaryMessage(entry.summary, entry.fromId, entry.timestamp));
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}
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};
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if (compaction) {
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// Emit summary first
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messages.push(createCompactionSummaryMessage(compaction.summary, compaction.tokensBefore, compaction.timestamp));
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// Find compaction index in path
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const compactionIdx = path.findIndex((e) => e.type === "compaction" && e.id === compaction.id);
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// Emit kept messages (before compaction, starting from firstKeptEntryId)
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let foundFirstKept = false;
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for (let i = 0; i < compactionIdx; i++) {
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const entry = path[i];
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if (entry.id === compaction.firstKeptEntryId) {
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foundFirstKept = true;
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}
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if (foundFirstKept) {
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appendMessage(entry);
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}
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}
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// Emit messages after compaction
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for (let i = compactionIdx + 1; i < path.length; i++) {
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const entry = path[i];
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appendMessage(entry);
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}
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} else {
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// No compaction - emit all messages, handle branch summaries and custom messages
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for (const entry of path) {
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appendMessage(entry);
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}
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}
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return { messages, thinkingLevel, models, injectedTtsrRules };
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}
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/**
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* Compute the default session directory for a cwd.
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* Encodes cwd into a safe directory name under ~/.omp/agent/sessions/.
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*/
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function getDefaultSessionDir(cwd: string, storage: SessionStorage): string {
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const safePath = `--${cwd.replace(/^[/\\]/, "").replace(/[/\\:]/g, "-")}--`;
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const sessionDir = join(getDefaultAgentDir(), "sessions", safePath);
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storage.ensureDirSync(sessionDir);
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return sessionDir;
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}
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/** Exported for testing */
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export function loadEntriesFromFile(filePath: string, storage: SessionStorage = new FileSessionStorage()): FileEntry[] {
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if (!storage.existsSync(filePath)) return [];
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const content = storage.readTextSync(filePath);
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const entries: FileEntry[] = [];
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const lines = content.trim().split("\n");
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for (const line of lines) {
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if (!line.trim()) continue;
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try {
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const entry = JSON.parse(line) as FileEntry;
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entries.push(entry);
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} catch {
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// Skip malformed lines
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}
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}
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|
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// Validate session header
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if (entries.length === 0) return entries;
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const header = entries[0];
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if (header.type !== "session" || typeof (header as any).id !== "string") {
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return [];
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}
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return entries;
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}
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/**
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* Lightweight metadata for a session file, used in session picker UI.
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* Uses lazy getters to defer string formatting until actually displayed.
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*/
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class RecentSessionInfo {
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readonly path: string;
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readonly mtime: number;
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|
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#fullName: string | undefined;
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#name: string | undefined;
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#timeAgo: string | undefined;
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constructor(path: string, mtime: number, header: Record<string, unknown>) {
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this.path = path;
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this.mtime = mtime;
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|
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// Extract title from session header, falling back to id if title is missing
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const trystr = (v: unknown) => (typeof v === "string" ? v : undefined);
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this.#fullName = trystr(header.title) ?? trystr(header.id);
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}
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|
|
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/** Full session name from header, or filename without extension as fallback */
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get fullName(): string {
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if (this.#fullName) return this.#fullName;
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this.#fullName = this.path.split("/").pop()?.replace(".jsonl", "") ?? "Unknown";
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return this.#fullName;
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}
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|
|
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/** Truncated name for display (max 40 chars) */
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get name(): string {
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if (this.#name) return this.#name;
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const fullName = this.fullName;
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this.#name = fullName.length <= 40 ? fullName : `${fullName.slice(0, 37)}...`;
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return this.#name;
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}
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/** Human-readable relative time (e.g., "2 hours ago") */
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get timeAgo(): string {
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if (this.#timeAgo) return this.#timeAgo;
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this.#timeAgo = formatTimeAgo(new Date(this.mtime));
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return this.#timeAgo;
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}
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}
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|
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/**
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* Reads all session files from the directory and returns them sorted by mtime (newest first).
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* Uses low-level file I/O to efficiently read only the first 512 bytes of each file
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* to extract the JSON header without loading entire session logs into memory.
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*/
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function getSortedSessions(sessionDir: string, storage: SessionStorage): RecentSessionInfo[] {
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try {
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const buf = Buffer.alloc(512);
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const files: string[] = storage.listFilesSync(sessionDir, "*.jsonl");
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return files
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.map((path: string) => {
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try {
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const length = storage.readTextPrefixSync(path, buf);
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const content = buf.toString("utf-8", 0, length);
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const firstLine = content.split("\n")[0];
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if (!firstLine || !firstLine.trim()) return null;
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const header = JSON.parse(firstLine) as Record<string, unknown>;
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if (header.type !== "session" || typeof header.id !== "string") return null;
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const mtime = storage.statSync(path).mtimeMs;
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return new RecentSessionInfo(path, mtime, header);
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} catch {
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return null;
|
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}
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})
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.filter((item): item is RecentSessionInfo => item !== null)
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.sort((a, b) => b.mtime - a.mtime);
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} catch {
|
|
return [];
|
|
}
|
|
}
|
|
|
|
/** Exported for testing */
|
|
export function findMostRecentSession(
|
|
sessionDir: string,
|
|
storage: SessionStorage = new FileSessionStorage(),
|
|
): string | null {
|
|
const sessions = getSortedSessions(sessionDir, storage);
|
|
return sessions[0]?.path || null;
|
|
}
|
|
|
|
/** Format a time difference as a human-readable string */
|
|
function formatTimeAgo(date: Date): string {
|
|
const now = Date.now();
|
|
const diffMs = now - date.getTime();
|
|
const diffMins = Math.floor(diffMs / 60000);
|
|
const diffHours = Math.floor(diffMs / 3600000);
|
|
const diffDays = Math.floor(diffMs / 86400000);
|
|
|
|
if (diffMins < 1) return "just now";
|
|
if (diffMins < 60) return `${diffMins}m ago`;
|
|
if (diffHours < 24) return `${diffHours}h ago`;
|
|
if (diffDays < 7) return `${diffDays}d ago`;
|
|
return date.toLocaleDateString();
|
|
}
|
|
|
|
const MAX_PERSIST_CHARS = 500_000;
|
|
const TRUNCATION_NOTICE = "\n\n[Session persistence truncated large content]";
|
|
const PLACEHOLDER_IMAGE_DATA =
|
|
"/9j/4AAQSkZJRgABAQEASABIAAD/2wBDAP//////////////////////////////////////////////////////////////////////////////////////2wBDAf//////////////////////////////////////////////////////////////////////////////////////wAARCAAQABADASIAAhEBAxEB/8QAFQABAQAAAAAAAAAAAAAAAAAAAAf/xAAUEAEAAAAAAAAAAAAAAAAAAAAA/8QAFQEBAQAAAAAAAAAAAAAAAAAAAgP/xAAUEQEAAAAAAAAAAAAAAAAAAAAA/9oADAMBAAIRAxEAPwCkA//Z";
|
|
|
|
const TEXT_CONTENT_KEY = "content";
|
|
|
|
/**
|
|
* Recursively truncate large strings in an object for session persistence.
|
|
* - Truncates any oversized string fields (key-agnostic)
|
|
* - Replaces oversized image blocks with text notices
|
|
* - Updates lineCount when content is truncated
|
|
* - Returns original object if no changes needed (structural sharing)
|
|
*/
|
|
function truncateString(value: string, maxLength: number): string {
|
|
if (value.length <= maxLength) return value;
|
|
let truncated = value.slice(0, maxLength);
|
|
if (truncated.length > 0) {
|
|
const last = truncated.charCodeAt(truncated.length - 1);
|
|
if (last >= 0xd800 && last <= 0xdbff) {
|
|
truncated = truncated.slice(0, -1);
|
|
}
|
|
}
|
|
return truncated;
|
|
}
|
|
|
|
function isImageBlock(value: unknown): value is { type: "image"; data: string; mimeType?: string } {
|
|
return (
|
|
typeof value === "object" &&
|
|
value !== null &&
|
|
"type" in value &&
|
|
(value as { type?: string }).type === "image" &&
|
|
"data" in value &&
|
|
typeof (value as { data?: string }).data === "string"
|
|
);
|
|
}
|
|
|
|
async function compressImageForPersistence(image: ImageContent): Promise<ImageContent> {
|
|
try {
|
|
const maxBytes = Math.floor((MAX_PERSIST_CHARS * 3) / 4);
|
|
const resized = await resizeImage(image, {
|
|
maxWidth: 512,
|
|
maxHeight: 512,
|
|
maxBytes,
|
|
jpegQuality: 70,
|
|
});
|
|
if (resized.data.length > MAX_PERSIST_CHARS) {
|
|
return { type: "image", data: PLACEHOLDER_IMAGE_DATA, mimeType: "image/jpeg" };
|
|
}
|
|
return { type: "image", data: resized.data, mimeType: resized.mimeType };
|
|
} catch {
|
|
return { type: "image", data: PLACEHOLDER_IMAGE_DATA, mimeType: "image/jpeg" };
|
|
}
|
|
}
|
|
|
|
async function truncateForPersistence<T>(obj: T, key?: string): Promise<T> {
|
|
if (obj === null || obj === undefined) return obj;
|
|
|
|
if (typeof obj === "string") {
|
|
if (obj.length > MAX_PERSIST_CHARS) {
|
|
const limit = Math.max(0, MAX_PERSIST_CHARS - TRUNCATION_NOTICE.length);
|
|
return `${truncateString(obj, limit)}${TRUNCATION_NOTICE}` as T;
|
|
}
|
|
return obj;
|
|
}
|
|
|
|
if (Array.isArray(obj)) {
|
|
let changed = false;
|
|
const result = await Promise.all(
|
|
obj.map(async (item) => {
|
|
// Special handling: compress oversized images while preserving shape
|
|
if (key === TEXT_CONTENT_KEY && isImageBlock(item)) {
|
|
if (item.data.length > MAX_PERSIST_CHARS) {
|
|
changed = true;
|
|
return compressImageForPersistence({
|
|
type: "image",
|
|
data: item.data,
|
|
mimeType: item.mimeType ?? "image/jpeg",
|
|
});
|
|
}
|
|
}
|
|
const newItem = await truncateForPersistence(item, key);
|
|
if (newItem !== item) changed = true;
|
|
return newItem;
|
|
}),
|
|
);
|
|
return changed ? (result as T) : obj;
|
|
}
|
|
|
|
if (typeof obj === "object") {
|
|
let changed = false;
|
|
const result: Record<string, unknown> = {};
|
|
for (const [k, v] of Object.entries(obj as Record<string, unknown>)) {
|
|
// Strip transient/redundant properties that shouldn't be persisted
|
|
// - partialJson: streaming accumulator for tool call JSON parsing
|
|
// - jsonlEvents: raw subprocess streaming events (already saved to artifact files)
|
|
if (k === "partialJson" || k === "jsonlEvents") {
|
|
changed = true;
|
|
continue;
|
|
}
|
|
const newV = await truncateForPersistence(v, k);
|
|
result[k] = newV;
|
|
if (newV !== v) changed = true;
|
|
}
|
|
// Update lineCount if content was truncated (for FileMentionFile)
|
|
if (changed && "lineCount" in result && "content" in result && typeof result.content === "string") {
|
|
result.lineCount = result.content.split("\n").length;
|
|
}
|
|
return changed ? (result as T) : obj;
|
|
}
|
|
|
|
return obj;
|
|
}
|
|
|
|
async function prepareEntryForPersistence(entry: FileEntry): Promise<FileEntry> {
|
|
return truncateForPersistence(entry);
|
|
}
|
|
|
|
class NdjsonFileWriter {
|
|
private writer: SessionStorageWriter;
|
|
private closed = false;
|
|
private closing = false;
|
|
private error: Error | undefined;
|
|
private pendingWrites: Promise<void> = Promise.resolve();
|
|
private onError: ((err: Error) => void) | undefined;
|
|
|
|
constructor(storage: SessionStorage, path: string, options?: { flags?: "a" | "w"; onError?: (err: Error) => void }) {
|
|
this.onError = options?.onError;
|
|
this.writer = storage.openWriter(path, {
|
|
flags: options?.flags ?? "a",
|
|
onError: (err: Error) => this.recordError(err),
|
|
});
|
|
}
|
|
|
|
private recordError(err: unknown): Error {
|
|
const writeErr = toError(err);
|
|
if (!this.error) this.error = writeErr;
|
|
this.onError?.(writeErr);
|
|
return writeErr;
|
|
}
|
|
|
|
private enqueue(task: () => Promise<void>): Promise<void> {
|
|
const run = async () => {
|
|
if (this.error) throw this.error;
|
|
await task();
|
|
};
|
|
const next = this.pendingWrites.then(run);
|
|
void next.catch((err: unknown) => {
|
|
if (!this.error) this.error = toError(err);
|
|
});
|
|
this.pendingWrites = next;
|
|
return next;
|
|
}
|
|
|
|
private async writeLine(line: string): Promise<void> {
|
|
if (this.error) throw this.error;
|
|
try {
|
|
await this.writer.writeLine(line);
|
|
} catch (err) {
|
|
throw this.recordError(err);
|
|
}
|
|
}
|
|
|
|
/** Queue a write. Returns a promise so callers can await if needed. */
|
|
write(entry: FileEntry): Promise<void> {
|
|
if (this.closed || this.closing) throw new Error("Writer closed");
|
|
if (this.error) throw this.error;
|
|
const line = `${JSON.stringify(entry)}\n`;
|
|
return this.enqueue(() => this.writeLine(line));
|
|
}
|
|
|
|
/** Flush all buffered data to disk. Waits for all queued writes. */
|
|
async flush(): Promise<void> {
|
|
if (this.closed) return;
|
|
if (this.error) throw this.error;
|
|
|
|
await this.enqueue(async () => {});
|
|
|
|
if (this.error) throw this.error;
|
|
|
|
try {
|
|
await this.writer.flush();
|
|
} catch (err) {
|
|
throw this.recordError(err);
|
|
}
|
|
}
|
|
|
|
/** Sync data to persistent storage. */
|
|
async fsync(): Promise<void> {
|
|
if (this.closed) return;
|
|
if (this.error) throw this.error;
|
|
try {
|
|
await this.writer.fsync();
|
|
} catch (err) {
|
|
throw this.recordError(err);
|
|
}
|
|
}
|
|
|
|
/** Close the writer, flushing all data. */
|
|
async close(): Promise<void> {
|
|
if (this.closed || this.closing) return;
|
|
this.closing = true;
|
|
|
|
let closeError: Error | undefined;
|
|
try {
|
|
await this.flush();
|
|
} catch (err) {
|
|
closeError = toError(err);
|
|
}
|
|
|
|
try {
|
|
await this.pendingWrites;
|
|
} catch (err) {
|
|
if (!closeError) closeError = toError(err);
|
|
}
|
|
|
|
try {
|
|
await this.writer.close();
|
|
} catch (err) {
|
|
const endErr = this.recordError(err);
|
|
if (!closeError) closeError = endErr;
|
|
}
|
|
|
|
this.closed = true;
|
|
|
|
if (!closeError && this.error) closeError = this.error;
|
|
if (closeError) throw closeError;
|
|
}
|
|
|
|
/** Check if there's a stored error. */
|
|
getError(): Error | undefined {
|
|
return this.error;
|
|
}
|
|
}
|
|
|
|
/** Get recent sessions for display in welcome screen */
|
|
export function getRecentSessions(
|
|
sessionDir: string,
|
|
limit = 3,
|
|
storage: SessionStorage = new FileSessionStorage(),
|
|
): RecentSessionInfo[] {
|
|
return getSortedSessions(sessionDir, storage).slice(0, limit);
|
|
}
|
|
|
|
/**
|
|
* Manages conversation sessions as append-only trees stored in JSONL files.
|
|
*
|
|
* Each session entry has an id and parentId forming a tree structure. The "leaf"
|
|
* pointer tracks the current position. Appending creates a child of the current leaf.
|
|
* Branching moves the leaf to an earlier entry, allowing new branches without
|
|
* modifying history.
|
|
*
|
|
* Use buildSessionContext() to get the resolved message list for the LLM, which
|
|
* handles compaction summaries and follows the path from root to current leaf.
|
|
*/
|
|
export interface UsageStatistics {
|
|
input: number;
|
|
output: number;
|
|
cacheRead: number;
|
|
cacheWrite: number;
|
|
cost: number;
|
|
}
|
|
|
|
function getTaskToolUsage(details: unknown): Usage | undefined {
|
|
if (!details || typeof details !== "object") return undefined;
|
|
const record = details as Record<string, unknown>;
|
|
const usage = record.usage;
|
|
if (!usage || typeof usage !== "object") return undefined;
|
|
return usage as Usage;
|
|
}
|
|
|
|
export class SessionManager {
|
|
private sessionId: string = "";
|
|
private sessionTitle: string | undefined;
|
|
private sessionFile: string | undefined;
|
|
private sessionDir: string;
|
|
private cwd: string;
|
|
private persist: boolean;
|
|
private flushed: boolean = false;
|
|
private fileEntries: FileEntry[] = [];
|
|
private byId: Map<string, SessionEntry> = new Map();
|
|
private labelsById: Map<string, string> = new Map();
|
|
private leafId: string | null = null;
|
|
private usageStatistics: UsageStatistics = { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, cost: 0 };
|
|
private persistWriter: NdjsonFileWriter | undefined;
|
|
private persistWriterPath: string | undefined;
|
|
private persistChain: Promise<void> = Promise.resolve();
|
|
private persistError: Error | undefined;
|
|
private persistErrorReported = false;
|
|
private storage: SessionStorage;
|
|
|
|
private constructor(cwd: string, sessionDir: string, persist: boolean, storage: SessionStorage) {
|
|
this.cwd = cwd;
|
|
this.sessionDir = sessionDir;
|
|
this.persist = persist;
|
|
this.storage = storage;
|
|
if (persist && sessionDir) {
|
|
this.storage.ensureDirSync(sessionDir);
|
|
}
|
|
// Note: call _initSession() or _initSessionFile() after construction
|
|
}
|
|
|
|
/** Initialize with a specific session file (used by factory methods) */
|
|
private async _initSessionFile(sessionFile: string): Promise<void> {
|
|
await this.setSessionFile(sessionFile);
|
|
}
|
|
|
|
/** Initialize with a new session (used by factory methods) */
|
|
private _initNewSession(): void {
|
|
this._newSessionSync();
|
|
}
|
|
|
|
/** Switch to a different session file (used for resume and branching) */
|
|
async setSessionFile(sessionFile: string): Promise<void> {
|
|
await this._closePersistWriter();
|
|
this.persistError = undefined;
|
|
this.persistErrorReported = false;
|
|
this.sessionFile = resolve(sessionFile);
|
|
if (this.storage.existsSync(this.sessionFile)) {
|
|
this.fileEntries = loadEntriesFromFile(this.sessionFile!, this.storage);
|
|
const header = this.fileEntries.find((e) => e.type === "session") as SessionHeader | undefined;
|
|
this.sessionId = header?.id ?? nanoid();
|
|
this.sessionTitle = header?.title;
|
|
|
|
if (migrateToCurrentVersion(this.fileEntries)) {
|
|
await this._rewriteFile();
|
|
}
|
|
|
|
this._buildIndex();
|
|
this.flushed = true;
|
|
} else {
|
|
this._newSessionSync();
|
|
}
|
|
}
|
|
|
|
/** Start a new session. Closes any existing writer first. */
|
|
async newSession(options?: NewSessionOptions): Promise<string | undefined> {
|
|
await this._closePersistWriter();
|
|
return this._newSessionSync(options);
|
|
}
|
|
|
|
/** Sync version for initial creation (no existing writer to close) */
|
|
private _newSessionSync(options?: NewSessionOptions): string | undefined {
|
|
this.persistChain = Promise.resolve();
|
|
this.persistError = undefined;
|
|
this.persistErrorReported = false;
|
|
this.sessionId = nanoid();
|
|
const timestamp = new Date().toISOString();
|
|
const header: SessionHeader = {
|
|
type: "session",
|
|
version: CURRENT_SESSION_VERSION,
|
|
id: this.sessionId,
|
|
timestamp,
|
|
cwd: this.cwd,
|
|
parentSession: options?.parentSession,
|
|
};
|
|
this.fileEntries = [header];
|
|
this.byId.clear();
|
|
this.leafId = null;
|
|
this.flushed = false;
|
|
this.usageStatistics = { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, cost: 0 };
|
|
|
|
// Only generate filename if persisting and not already set (e.g., via --session flag)
|
|
if (this.persist && !this.sessionFile) {
|
|
const fileTimestamp = timestamp.replace(/[:.]/g, "-");
|
|
this.sessionFile = join(this.getSessionDir(), `${fileTimestamp}_${this.sessionId}.jsonl`);
|
|
}
|
|
return this.sessionFile;
|
|
}
|
|
|
|
private _buildIndex(): void {
|
|
this.byId.clear();
|
|
this.labelsById.clear();
|
|
this.leafId = null;
|
|
this.usageStatistics = { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, cost: 0 };
|
|
for (const entry of this.fileEntries) {
|
|
if (entry.type === "session") continue;
|
|
this.byId.set(entry.id, entry);
|
|
this.leafId = entry.id;
|
|
if (entry.type === "label") {
|
|
if (entry.label) {
|
|
this.labelsById.set(entry.targetId, entry.label);
|
|
} else {
|
|
this.labelsById.delete(entry.targetId);
|
|
}
|
|
}
|
|
if (entry.type === "message" && entry.message.role === "assistant") {
|
|
const usage = entry.message.usage;
|
|
this.usageStatistics.input += usage.input;
|
|
this.usageStatistics.output += usage.output;
|
|
this.usageStatistics.cacheRead += usage.cacheRead;
|
|
this.usageStatistics.cacheWrite += usage.cacheWrite;
|
|
this.usageStatistics.cost += usage.cost.total;
|
|
}
|
|
|
|
if (entry.type === "message" && entry.message.role === "toolResult" && entry.message.toolName === "task") {
|
|
const usage = getTaskToolUsage(entry.message.details);
|
|
if (usage) {
|
|
this.usageStatistics.input += usage.input;
|
|
this.usageStatistics.output += usage.output;
|
|
this.usageStatistics.cacheRead += usage.cacheRead;
|
|
this.usageStatistics.cacheWrite += usage.cacheWrite;
|
|
this.usageStatistics.cost += usage.cost.total;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
private _recordPersistError(err: unknown): Error {
|
|
const normalized = toError(err);
|
|
if (!this.persistError) this.persistError = normalized;
|
|
if (!this.persistErrorReported) {
|
|
this.persistErrorReported = true;
|
|
logger.error("Session persistence error.", {
|
|
sessionFile: this.sessionFile,
|
|
error: normalized.message,
|
|
stack: normalized.stack,
|
|
});
|
|
}
|
|
return normalized;
|
|
}
|
|
|
|
private _queuePersistTask(task: () => Promise<void>, options?: { ignoreError?: boolean }): Promise<void> {
|
|
const next = this.persistChain.then(async () => {
|
|
if (this.persistError && !options?.ignoreError) throw this.persistError;
|
|
await task();
|
|
});
|
|
this.persistChain = next.catch((err) => {
|
|
this._recordPersistError(err);
|
|
});
|
|
return next;
|
|
}
|
|
|
|
private _ensurePersistWriter(): NdjsonFileWriter | undefined {
|
|
if (!this.persist || !this.sessionFile) return undefined;
|
|
if (this.persistError) throw this.persistError;
|
|
if (this.persistWriter && this.persistWriterPath === this.sessionFile) return this.persistWriter;
|
|
// Note: caller must await _closePersistWriter() before calling this if switching files
|
|
this.persistWriter = new NdjsonFileWriter(this.storage, this.sessionFile, {
|
|
onError: (err) => {
|
|
this._recordPersistError(err);
|
|
},
|
|
});
|
|
this.persistWriterPath = this.sessionFile;
|
|
return this.persistWriter;
|
|
}
|
|
|
|
private async _closePersistWriterInternal(): Promise<void> {
|
|
if (this.persistWriter) {
|
|
await this.persistWriter.close();
|
|
this.persistWriter = undefined;
|
|
}
|
|
this.persistWriterPath = undefined;
|
|
}
|
|
|
|
private async _closePersistWriter(): Promise<void> {
|
|
await this._queuePersistTask(
|
|
async () => {
|
|
await this._closePersistWriterInternal();
|
|
},
|
|
{ ignoreError: true },
|
|
);
|
|
}
|
|
|
|
private async _writeEntriesAtomically(entries: FileEntry[]): Promise<void> {
|
|
if (!this.sessionFile) return;
|
|
const dir = resolve(this.sessionFile, "..");
|
|
const tempPath = join(dir, `.${basename(this.sessionFile)}.${nanoid(6)}.tmp`);
|
|
const writer = new NdjsonFileWriter(this.storage, tempPath, { flags: "w" });
|
|
try {
|
|
for (const entry of entries) {
|
|
await writer.write(entry);
|
|
}
|
|
await writer.flush();
|
|
await writer.fsync();
|
|
await writer.close();
|
|
await this.storage.rename(tempPath, this.sessionFile);
|
|
this.storage.fsyncDirSync(dir);
|
|
} catch (err) {
|
|
try {
|
|
await writer.close();
|
|
} catch {
|
|
// Ignore cleanup errors
|
|
}
|
|
try {
|
|
await this.storage.unlink(tempPath);
|
|
} catch {
|
|
// Ignore cleanup errors
|
|
}
|
|
throw toError(err);
|
|
}
|
|
}
|
|
|
|
private async _rewriteFile(): Promise<void> {
|
|
if (!this.persist || !this.sessionFile) return;
|
|
await this._queuePersistTask(async () => {
|
|
await this._closePersistWriterInternal();
|
|
const entries = await Promise.all(this.fileEntries.map((entry) => prepareEntryForPersistence(entry)));
|
|
await this._writeEntriesAtomically(entries);
|
|
this.flushed = true;
|
|
});
|
|
}
|
|
|
|
isPersisted(): boolean {
|
|
return this.persist;
|
|
}
|
|
|
|
/** Flush pending writes to disk. Call before switching sessions or on shutdown. */
|
|
async flush(): Promise<void> {
|
|
if (!this.persistWriter) return;
|
|
await this._queuePersistTask(async () => {
|
|
if (this.persistWriter) {
|
|
await this.persistWriter.flush();
|
|
await this.persistWriter.fsync();
|
|
}
|
|
});
|
|
if (this.persistError) throw this.persistError;
|
|
}
|
|
|
|
getCwd(): string {
|
|
return this.cwd;
|
|
}
|
|
|
|
/** Get usage statistics across all assistant messages in the session. */
|
|
getUsageStatistics(): UsageStatistics {
|
|
return this.usageStatistics;
|
|
}
|
|
|
|
getSessionDir(): string {
|
|
return this.sessionDir;
|
|
}
|
|
|
|
getSessionId(): string {
|
|
return this.sessionId;
|
|
}
|
|
|
|
getSessionFile(): string | undefined {
|
|
return this.sessionFile;
|
|
}
|
|
|
|
getSessionTitle(): string | undefined {
|
|
return this.sessionTitle;
|
|
}
|
|
|
|
async setSessionTitle(title: string): Promise<void> {
|
|
this.sessionTitle = title;
|
|
|
|
// Update the in-memory header (so first flush includes title)
|
|
const header = this.fileEntries.find((e) => e.type === "session") as SessionHeader | undefined;
|
|
if (header) {
|
|
header.title = title;
|
|
}
|
|
|
|
// Update the session file header with the title (if already flushed)
|
|
const sessionFile = this.sessionFile;
|
|
if (this.persist && sessionFile && this.storage.existsSync(sessionFile)) {
|
|
await this._rewriteFile();
|
|
}
|
|
}
|
|
|
|
_persist(entry: SessionEntry): void {
|
|
if (!this.persist || !this.sessionFile) return;
|
|
if (this.persistError) throw this.persistError;
|
|
|
|
const hasAssistant = this.fileEntries.some((e) => e.type === "message" && e.message.role === "assistant");
|
|
if (!hasAssistant) return;
|
|
|
|
if (!this.flushed) {
|
|
this.flushed = true;
|
|
void this._queuePersistTask(async () => {
|
|
const writer = this._ensurePersistWriter();
|
|
if (!writer) return;
|
|
const entries = await Promise.all(this.fileEntries.map((e) => prepareEntryForPersistence(e)));
|
|
for (const persistedEntry of entries) {
|
|
await writer.write(persistedEntry);
|
|
}
|
|
});
|
|
} else {
|
|
void this._queuePersistTask(async () => {
|
|
const writer = this._ensurePersistWriter();
|
|
if (!writer) return;
|
|
const persistedEntry = await prepareEntryForPersistence(entry);
|
|
await writer.write(persistedEntry);
|
|
});
|
|
}
|
|
}
|
|
|
|
private _appendEntry(entry: SessionEntry): void {
|
|
this.fileEntries.push(entry);
|
|
this.byId.set(entry.id, entry);
|
|
this.leafId = entry.id;
|
|
this._persist(entry);
|
|
if (entry.type === "message" && entry.message.role === "assistant") {
|
|
const usage = entry.message.usage;
|
|
this.usageStatistics.input += usage.input;
|
|
this.usageStatistics.output += usage.output;
|
|
this.usageStatistics.cacheRead += usage.cacheRead;
|
|
this.usageStatistics.cacheWrite += usage.cacheWrite;
|
|
this.usageStatistics.cost += usage.cost.total;
|
|
}
|
|
|
|
if (entry.type === "message" && entry.message.role === "toolResult" && entry.message.toolName === "task") {
|
|
const usage = getTaskToolUsage(entry.message.details);
|
|
if (usage) {
|
|
this.usageStatistics.input += usage.input;
|
|
this.usageStatistics.output += usage.output;
|
|
this.usageStatistics.cacheRead += usage.cacheRead;
|
|
this.usageStatistics.cacheWrite += usage.cacheWrite;
|
|
this.usageStatistics.cost += usage.cost.total;
|
|
}
|
|
}
|
|
}
|
|
|
|
/** Append a message as child of current leaf, then advance leaf. Returns entry id.
|
|
* Does not allow writing CompactionSummaryMessage and BranchSummaryMessage directly.
|
|
* Reason: we want these to be top-level entries in the session, not message session entries,
|
|
* so it is easier to find them.
|
|
* These need to be appended via appendCompaction() and appendBranchSummary() methods.
|
|
*/
|
|
appendMessage(message: Message | CustomMessage | HookMessage | BashExecutionMessage | FileMentionMessage): string {
|
|
const entry: SessionMessageEntry = {
|
|
type: "message",
|
|
id: generateId(this.byId),
|
|
parentId: this.leafId,
|
|
timestamp: new Date().toISOString(),
|
|
message,
|
|
};
|
|
this._appendEntry(entry);
|
|
return entry.id;
|
|
}
|
|
|
|
/** Append a thinking level change as child of current leaf, then advance leaf. Returns entry id. */
|
|
appendThinkingLevelChange(thinkingLevel: string): string {
|
|
const entry: ThinkingLevelChangeEntry = {
|
|
type: "thinking_level_change",
|
|
id: generateId(this.byId),
|
|
parentId: this.leafId,
|
|
timestamp: new Date().toISOString(),
|
|
thinkingLevel,
|
|
};
|
|
this._appendEntry(entry);
|
|
return entry.id;
|
|
}
|
|
|
|
/**
|
|
* Append a model change as child of current leaf, then advance leaf. Returns entry id.
|
|
* @param model Model in "provider/modelId" format
|
|
* @param role Optional role (default: "default")
|
|
*/
|
|
appendModelChange(model: string, role?: string): string {
|
|
const entry: ModelChangeEntry = {
|
|
type: "model_change",
|
|
id: generateId(this.byId),
|
|
parentId: this.leafId,
|
|
timestamp: new Date().toISOString(),
|
|
model,
|
|
role,
|
|
};
|
|
this._appendEntry(entry);
|
|
return entry.id;
|
|
}
|
|
|
|
/** Append a compaction summary as child of current leaf, then advance leaf. Returns entry id. */
|
|
appendCompaction<T = unknown>(
|
|
summary: string,
|
|
firstKeptEntryId: string,
|
|
tokensBefore: number,
|
|
details?: T,
|
|
fromExtension?: boolean,
|
|
): string {
|
|
const entry: CompactionEntry<T> = {
|
|
type: "compaction",
|
|
id: generateId(this.byId),
|
|
parentId: this.leafId,
|
|
timestamp: new Date().toISOString(),
|
|
summary,
|
|
firstKeptEntryId,
|
|
tokensBefore,
|
|
details,
|
|
fromExtension,
|
|
};
|
|
this._appendEntry(entry);
|
|
return entry.id;
|
|
}
|
|
|
|
/** Append a custom entry (for extensions) as child of current leaf, then advance leaf. Returns entry id. */
|
|
appendCustomEntry(customType: string, data?: unknown): string {
|
|
const entry: CustomEntry = {
|
|
type: "custom",
|
|
customType,
|
|
data,
|
|
id: generateId(this.byId),
|
|
parentId: this.leafId,
|
|
timestamp: new Date().toISOString(),
|
|
};
|
|
this._appendEntry(entry);
|
|
return entry.id;
|
|
}
|
|
|
|
/**
|
|
* Append a custom message entry (for extensions) that participates in LLM context.
|
|
* @param customType Hook identifier for filtering on reload
|
|
* @param content Message content (string or TextContent/ImageContent array)
|
|
* @param display Whether to show in TUI (true = styled display, false = hidden)
|
|
* @param details Optional extension-specific metadata (not sent to LLM)
|
|
* @returns Entry id
|
|
*/
|
|
appendCustomMessageEntry<T = unknown>(
|
|
customType: string,
|
|
content: string | (TextContent | ImageContent)[],
|
|
display: boolean,
|
|
details?: T,
|
|
): string {
|
|
const entry: CustomMessageEntry<T> = {
|
|
type: "custom_message",
|
|
customType,
|
|
content,
|
|
display,
|
|
details,
|
|
id: generateId(this.byId),
|
|
parentId: this.leafId,
|
|
timestamp: new Date().toISOString(),
|
|
};
|
|
this._appendEntry(entry);
|
|
return entry.id;
|
|
}
|
|
|
|
// =========================================================================
|
|
// TTSR (Time Traveling Stream Rules)
|
|
// =========================================================================
|
|
|
|
/**
|
|
* Append a TTSR injection entry recording which rules were injected.
|
|
* @param ruleNames Names of rules that were injected
|
|
* @returns Entry id
|
|
*/
|
|
appendTtsrInjection(ruleNames: string[]): string {
|
|
const entry: TtsrInjectionEntry = {
|
|
type: "ttsr_injection",
|
|
id: generateId(this.byId),
|
|
parentId: this.leafId,
|
|
timestamp: new Date().toISOString(),
|
|
injectedRules: ruleNames,
|
|
};
|
|
this._appendEntry(entry);
|
|
return entry.id;
|
|
}
|
|
|
|
/**
|
|
* Get all unique TTSR rule names that have been injected in the current branch.
|
|
* Scans from root to current leaf for ttsr_injection entries.
|
|
*/
|
|
getInjectedTtsrRules(): string[] {
|
|
const path = this.getBranch();
|
|
const ruleNames = new Set<string>();
|
|
for (const entry of path) {
|
|
if (entry.type === "ttsr_injection") {
|
|
for (const name of entry.injectedRules) {
|
|
ruleNames.add(name);
|
|
}
|
|
}
|
|
}
|
|
return Array.from(ruleNames);
|
|
}
|
|
|
|
// =========================================================================
|
|
// Tree Traversal
|
|
// =========================================================================
|
|
|
|
getLeafId(): string | null {
|
|
return this.leafId;
|
|
}
|
|
|
|
getLeafEntry(): SessionEntry | undefined {
|
|
return this.leafId ? this.byId.get(this.leafId) : undefined;
|
|
}
|
|
|
|
getEntry(id: string): SessionEntry | undefined {
|
|
return this.byId.get(id);
|
|
}
|
|
|
|
/**
|
|
* Get all direct children of an entry.
|
|
*/
|
|
getChildren(parentId: string): SessionEntry[] {
|
|
const children: SessionEntry[] = [];
|
|
for (const entry of this.byId.values()) {
|
|
if (entry.parentId === parentId) {
|
|
children.push(entry);
|
|
}
|
|
}
|
|
return children;
|
|
}
|
|
|
|
/**
|
|
* Get the label for an entry, if any.
|
|
*/
|
|
getLabel(id: string): string | undefined {
|
|
return this.labelsById.get(id);
|
|
}
|
|
|
|
/**
|
|
* Set or clear a label on an entry.
|
|
* Labels are user-defined markers for bookmarking/navigation.
|
|
* Pass undefined or empty string to clear the label.
|
|
*/
|
|
appendLabelChange(targetId: string, label: string | undefined): string {
|
|
if (!this.byId.has(targetId)) {
|
|
throw new Error(`Entry ${targetId} not found`);
|
|
}
|
|
const entry: LabelEntry = {
|
|
type: "label",
|
|
id: generateId(this.byId),
|
|
parentId: this.leafId,
|
|
timestamp: new Date().toISOString(),
|
|
targetId,
|
|
label,
|
|
};
|
|
this._appendEntry(entry);
|
|
if (label) {
|
|
this.labelsById.set(targetId, label);
|
|
} else {
|
|
this.labelsById.delete(targetId);
|
|
}
|
|
return entry.id;
|
|
}
|
|
|
|
/**
|
|
* Walk from entry to root, returning all entries in path order.
|
|
* Includes all entry types (messages, compaction, model changes, etc.).
|
|
* Use buildSessionContext() to get the resolved messages for the LLM.
|
|
*/
|
|
getBranch(fromId?: string): SessionEntry[] {
|
|
const path: SessionEntry[] = [];
|
|
const startId = fromId ?? this.leafId;
|
|
let current = startId ? this.byId.get(startId) : undefined;
|
|
while (current) {
|
|
path.unshift(current);
|
|
current = current.parentId ? this.byId.get(current.parentId) : undefined;
|
|
}
|
|
return path;
|
|
}
|
|
|
|
/**
|
|
* Build the session context (what gets sent to the LLM).
|
|
* Uses tree traversal from current leaf.
|
|
*/
|
|
buildSessionContext(): SessionContext {
|
|
return buildSessionContext(this.getEntries(), this.leafId, this.byId);
|
|
}
|
|
|
|
/**
|
|
* Get session header.
|
|
*/
|
|
getHeader(): SessionHeader | null {
|
|
const h = this.fileEntries.find((e) => e.type === "session");
|
|
return h ? (h as SessionHeader) : null;
|
|
}
|
|
|
|
/**
|
|
* Get all session entries (excludes header). Returns a shallow copy.
|
|
* The session is append-only: use appendXXX() to add entries, branch() to
|
|
* change the leaf pointer. Entries cannot be modified or deleted.
|
|
*/
|
|
getEntries(): SessionEntry[] {
|
|
return this.fileEntries.filter((e): e is SessionEntry => e.type !== "session");
|
|
}
|
|
|
|
/**
|
|
* Get the session as a tree structure. Returns a shallow defensive copy of all entries.
|
|
* A well-formed session has exactly one root (first entry with parentId === null).
|
|
* Orphaned entries (broken parent chain) are also returned as roots.
|
|
*/
|
|
getTree(): SessionTreeNode[] {
|
|
const entries = this.getEntries();
|
|
const nodeMap = new Map<string, SessionTreeNode>();
|
|
const roots: SessionTreeNode[] = [];
|
|
|
|
// Create nodes with resolved labels
|
|
for (const entry of entries) {
|
|
const label = this.labelsById.get(entry.id);
|
|
nodeMap.set(entry.id, { entry, children: [], label });
|
|
}
|
|
|
|
// Build tree
|
|
for (const entry of entries) {
|
|
const node = nodeMap.get(entry.id)!;
|
|
if (entry.parentId === null || entry.parentId === entry.id) {
|
|
roots.push(node);
|
|
} else {
|
|
const parent = nodeMap.get(entry.parentId);
|
|
if (parent) {
|
|
parent.children.push(node);
|
|
} else {
|
|
// Orphan - treat as root
|
|
roots.push(node);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Sort children by timestamp (oldest first, newest at bottom)
|
|
// Use iterative approach to avoid stack overflow on deep trees
|
|
const stack: SessionTreeNode[] = [...roots];
|
|
while (stack.length > 0) {
|
|
const node = stack.pop()!;
|
|
node.children.sort((a, b) => new Date(a.entry.timestamp).getTime() - new Date(b.entry.timestamp).getTime());
|
|
stack.push(...node.children);
|
|
}
|
|
|
|
return roots;
|
|
}
|
|
|
|
// =========================================================================
|
|
// Branching
|
|
// =========================================================================
|
|
|
|
/**
|
|
* Start a new branch from an earlier entry.
|
|
* Moves the leaf pointer to the specified entry. The next appendXXX() call
|
|
* will create a child of that entry, forming a new branch. Existing entries
|
|
* are not modified or deleted.
|
|
*/
|
|
branch(branchFromId: string): void {
|
|
if (!this.byId.has(branchFromId)) {
|
|
throw new Error(`Entry ${branchFromId} not found`);
|
|
}
|
|
this.leafId = branchFromId;
|
|
}
|
|
|
|
/**
|
|
* Reset the leaf pointer to null (before any entries).
|
|
* The next appendXXX() call will create a new root entry (parentId = null).
|
|
* Use this when navigating to re-edit the first user message.
|
|
*/
|
|
resetLeaf(): void {
|
|
this.leafId = null;
|
|
}
|
|
|
|
/**
|
|
* Start a new branch with a summary of the abandoned path.
|
|
* Same as branch(), but also appends a branch_summary entry that captures
|
|
* context from the abandoned conversation path.
|
|
*/
|
|
branchWithSummary(branchFromId: string | null, summary: string, details?: unknown, fromExtension?: boolean): string {
|
|
if (branchFromId !== null && !this.byId.has(branchFromId)) {
|
|
throw new Error(`Entry ${branchFromId} not found`);
|
|
}
|
|
this.leafId = branchFromId;
|
|
const entry: BranchSummaryEntry = {
|
|
type: "branch_summary",
|
|
id: generateId(this.byId),
|
|
parentId: branchFromId,
|
|
timestamp: new Date().toISOString(),
|
|
fromId: branchFromId ?? "root",
|
|
summary,
|
|
details,
|
|
fromExtension,
|
|
};
|
|
this._appendEntry(entry);
|
|
return entry.id;
|
|
}
|
|
|
|
/**
|
|
* Create a new session file containing only the path from root to the specified leaf.
|
|
* Useful for extracting a single conversation path from a branched session.
|
|
* Returns the new session file path, or undefined if not persisting.
|
|
*/
|
|
createBranchedSession(leafId: string): string | undefined {
|
|
const path = this.getBranch(leafId);
|
|
if (path.length === 0) {
|
|
throw new Error(`Entry ${leafId} not found`);
|
|
}
|
|
|
|
// Filter out LabelEntry from path - we'll recreate them from the resolved map
|
|
const pathWithoutLabels = path.filter((e) => e.type !== "label");
|
|
|
|
const newSessionId = nanoid();
|
|
const timestamp = new Date().toISOString();
|
|
const fileTimestamp = timestamp.replace(/[:.]/g, "-");
|
|
const newSessionFile = join(this.getSessionDir(), `${fileTimestamp}_${newSessionId}.jsonl`);
|
|
|
|
const header: SessionHeader = {
|
|
type: "session",
|
|
version: CURRENT_SESSION_VERSION,
|
|
id: newSessionId,
|
|
timestamp,
|
|
cwd: this.cwd,
|
|
parentSession: this.persist ? this.sessionFile : undefined,
|
|
};
|
|
|
|
// Collect labels for entries in the path
|
|
const pathEntryIds = new Set(pathWithoutLabels.map((e) => e.id));
|
|
const labelsToWrite: Array<{ targetId: string; label: string }> = [];
|
|
for (const [targetId, label] of this.labelsById) {
|
|
if (pathEntryIds.has(targetId)) {
|
|
labelsToWrite.push({ targetId, label });
|
|
}
|
|
}
|
|
|
|
if (this.persist) {
|
|
const lines: string[] = [];
|
|
lines.push(JSON.stringify(header));
|
|
for (const entry of pathWithoutLabels) {
|
|
lines.push(JSON.stringify(entry));
|
|
}
|
|
// Write fresh label entries at the end
|
|
const lastEntryId = pathWithoutLabels[pathWithoutLabels.length - 1]?.id || null;
|
|
let parentId = lastEntryId;
|
|
const labelEntries: LabelEntry[] = [];
|
|
for (const { targetId, label } of labelsToWrite) {
|
|
const labelEntry: LabelEntry = {
|
|
type: "label",
|
|
id: generateId(new Set(pathEntryIds)),
|
|
parentId,
|
|
timestamp: new Date().toISOString(),
|
|
targetId,
|
|
label,
|
|
};
|
|
lines.push(JSON.stringify(labelEntry));
|
|
pathEntryIds.add(labelEntry.id);
|
|
labelEntries.push(labelEntry);
|
|
parentId = labelEntry.id;
|
|
}
|
|
this.storage.writeTextSync(newSessionFile, `${lines.join("\n")}\n`);
|
|
this.fileEntries = [header, ...pathWithoutLabels, ...labelEntries];
|
|
this.sessionId = newSessionId;
|
|
this._buildIndex();
|
|
return newSessionFile;
|
|
}
|
|
|
|
// In-memory mode: replace current session with the path + labels
|
|
const labelEntries: LabelEntry[] = [];
|
|
let parentId = pathWithoutLabels[pathWithoutLabels.length - 1]?.id || null;
|
|
for (const { targetId, label } of labelsToWrite) {
|
|
const labelEntry: LabelEntry = {
|
|
type: "label",
|
|
id: generateId(new Set([...pathEntryIds, ...labelEntries.map((e) => e.id)])),
|
|
parentId,
|
|
timestamp: new Date().toISOString(),
|
|
targetId,
|
|
label,
|
|
};
|
|
labelEntries.push(labelEntry);
|
|
parentId = labelEntry.id;
|
|
}
|
|
this.fileEntries = [header, ...pathWithoutLabels, ...labelEntries];
|
|
this.sessionId = newSessionId;
|
|
this._buildIndex();
|
|
return undefined;
|
|
}
|
|
|
|
/**
|
|
* Create a new session.
|
|
* @param cwd Working directory (stored in session header)
|
|
* @param sessionDir Optional session directory. If omitted, uses default (~/.omp/agent/sessions/<encoded-cwd>/).
|
|
*/
|
|
static create(cwd: string, sessionDir?: string, storage: SessionStorage = new FileSessionStorage()): SessionManager {
|
|
const dir = sessionDir ?? getDefaultSessionDir(cwd, storage);
|
|
const manager = new SessionManager(cwd, dir, true, storage);
|
|
manager._initNewSession();
|
|
return manager;
|
|
}
|
|
|
|
/**
|
|
* Open a specific session file.
|
|
* @param path Path to session file
|
|
* @param sessionDir Optional session directory for /new or /branch. If omitted, derives from file's parent.
|
|
*/
|
|
static async open(
|
|
path: string,
|
|
sessionDir?: string,
|
|
storage: SessionStorage = new FileSessionStorage(),
|
|
): Promise<SessionManager> {
|
|
// Extract cwd from session header if possible, otherwise use process.cwd()
|
|
const entries = loadEntriesFromFile(path, storage);
|
|
const header = entries.find((e) => e.type === "session") as SessionHeader | undefined;
|
|
const cwd = header?.cwd ?? process.cwd();
|
|
// If no sessionDir provided, derive from file's parent directory
|
|
const dir = sessionDir ?? resolve(path, "..");
|
|
const manager = new SessionManager(cwd, dir, true, storage);
|
|
await manager._initSessionFile(path);
|
|
return manager;
|
|
}
|
|
|
|
/**
|
|
* Continue the most recent session, or create new if none.
|
|
* @param cwd Working directory
|
|
* @param sessionDir Optional session directory. If omitted, uses default (~/.omp/agent/sessions/<encoded-cwd>/).
|
|
*/
|
|
static async continueRecent(
|
|
cwd: string,
|
|
sessionDir?: string,
|
|
storage: SessionStorage = new FileSessionStorage(),
|
|
): Promise<SessionManager> {
|
|
const dir = sessionDir ?? getDefaultSessionDir(cwd, storage);
|
|
const mostRecent = findMostRecentSession(dir, storage);
|
|
const manager = new SessionManager(cwd, dir, true, storage);
|
|
if (mostRecent) {
|
|
await manager._initSessionFile(mostRecent);
|
|
} else {
|
|
manager._initNewSession();
|
|
}
|
|
return manager;
|
|
}
|
|
|
|
/** Create an in-memory session (no file persistence) */
|
|
static inMemory(cwd: string = process.cwd(), storage: SessionStorage = new MemorySessionStorage()): SessionManager {
|
|
const manager = new SessionManager(cwd, "", false, storage);
|
|
manager._initNewSession();
|
|
return manager;
|
|
}
|
|
|
|
/**
|
|
* List all sessions.
|
|
* @param cwd Working directory (used to compute default session directory)
|
|
* @param sessionDir Optional session directory. If omitted, uses default (~/.omp/agent/sessions/<encoded-cwd>/).
|
|
*/
|
|
static list(cwd: string, sessionDir?: string, storage: SessionStorage = new FileSessionStorage()): SessionInfo[] {
|
|
const dir = sessionDir ?? getDefaultSessionDir(cwd, storage);
|
|
const sessions: SessionInfo[] = [];
|
|
|
|
try {
|
|
const files = storage.listFilesSync(dir, "*.jsonl");
|
|
|
|
for (const file of files) {
|
|
try {
|
|
const content = storage.readTextSync(file);
|
|
const lines = content.trim().split("\n");
|
|
if (lines.length === 0) continue;
|
|
|
|
// Check first line for valid session header
|
|
let header: { type: string; id: string; title?: string; timestamp: string } | null = null;
|
|
try {
|
|
const first = JSON.parse(lines[0]);
|
|
if (first.type === "session" && first.id) {
|
|
header = first;
|
|
}
|
|
} catch {
|
|
// Not valid JSON
|
|
}
|
|
if (!header) continue;
|
|
|
|
const stats = storage.statSync(file);
|
|
let messageCount = 0;
|
|
let firstMessage = "";
|
|
const allMessages: string[] = [];
|
|
|
|
for (let i = 1; i < lines.length; i++) {
|
|
try {
|
|
const entry = JSON.parse(lines[i]);
|
|
|
|
if (entry.type === "message") {
|
|
messageCount++;
|
|
|
|
if (entry.message.role === "user" || entry.message.role === "assistant") {
|
|
const textContent = entry.message.content
|
|
.filter((c: any) => c.type === "text")
|
|
.map((c: any) => c.text)
|
|
.join(" ");
|
|
|
|
if (textContent) {
|
|
allMessages.push(textContent);
|
|
|
|
if (!firstMessage && entry.message.role === "user") {
|
|
firstMessage = textContent;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} catch {
|
|
// Skip malformed lines
|
|
}
|
|
}
|
|
|
|
sessions.push({
|
|
path: file,
|
|
id: header.id,
|
|
title: header.title,
|
|
created: new Date(header.timestamp),
|
|
modified: stats.mtime,
|
|
messageCount,
|
|
firstMessage: firstMessage || "(no messages)",
|
|
allMessagesText: allMessages.join(" "),
|
|
});
|
|
} catch {
|
|
// Skip files that can't be read
|
|
}
|
|
}
|
|
|
|
sessions.sort((a, b) => b.modified.getTime() - a.modified.getTime());
|
|
} catch {
|
|
// Return empty list on error
|
|
}
|
|
|
|
return sessions;
|
|
}
|
|
}
|