Function buildSessionContext

lib/session-reader.ts:194–230

(
  entries: SessionEntry[],
  leafId?: string | null,
  options: { deferThinking?: boolean; deferToolResultImages?: boolean } = {},
)

}

export function buildSessionContext(
  entries: SessionEntry[],
  leafId?: string | null,
  options: { deferThinking?: boolean; deferToolResultImages?: boolean } = {},
): SessionContext {
  const byId = new Map<string, SessionEntry>();
  for (const e of entries) byId.set(e.id, e);

  const piEntries = entries as unknown as PiSessionEntry[];
  const piCtx = piBuildSessionContext(piEntries, leafId, byId as unknown as Map<string, PiSessionEntry>);

  const contextEntries = piBuildContextEntries(
    piEntries,
    leafId,
    byId as unknown as Map<string, PiSessionEntry>,
  );

  // Convert the SDK-selected context entries and their IDs together. This keeps
  // fork/navigation targets aligned while preserving pi's compaction ordering.
  const messages: AgentMessage[] = [];
  const entryIds: string[] = [];
  for (const entry of contextEntries) {
    const localEntry = entry as unknown as SessionEntry;
    const m = entryToUiMessage(localEntry, options);
    if (m) {
      messages.push(m);
      entryIds.push(localEntry.id);
    }
  }

  return {
    messages,
    entryIds,
    thinkingLevel: piCtx.thinkingLevel,
    model: piCtx.model,
  };
}

function parseEntryTimestamp(timestamp: string): number | undefined {
  const parsed = Date.parse(timestamp);