Function buildPiEntries

packages/cli/src/commands/migrate.ts:473–567

(params: {
    session: OpenCodeSessionRow;
    messages: OpenCodeMessageRow[];
    parts: OpenCodePartRow[];
    now: Date;
    provider: string;
    modelId: string;
})

}

function buildPiEntries(params: {
    session: OpenCodeSessionRow;
    messages: OpenCodeMessageRow[];
    parts: OpenCodePartRow[];
    now: Date;
    provider: string;
    modelId: string;
}): BuildEntriesResult {
    const sessionUuid = generateUuidV7(params.now);
    const nowIso = params.now.toISOString();
    const entries: PiJson[] = [
        {
            type: "session",
            version: 3,
            id: sessionUuid,
            timestamp: nowIso,
            cwd: params.session.directory ?? params.session.path ?? process.cwd(),
        },
        {
            type: "model_change",
            id: shortId(),
            parentId: null,
            timestamp: nowIso,
            provider: params.provider,
            modelId: params.modelId,
        },
    ];

    // Migration boundary marker — appears as the first user message in
    // the migrated session. This is intentionally stub usage (zeros)
    // because no real LLM produced it; it's a synthetic marker only.
    const boundary = makeMessageEntry(
        "user",
        `<!-- migrated from OpenCode session ${params.session.id} at ${nowIso} -->\n\nThe following conversation was migrated from a different harness. Reasoning context from prior turns may be incomplete; tool calls reference tools that may not exist in this environment.`,
        nowIso,
        null,
        {
            input: 0,
            output: 0,
            cacheRead: 0,
            cacheWrite: 0,
            totalTokens: 0,
            cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
        },
    );
    entries.push(boundary);

    const partsByMessage = new Map<string, OpenCodePartRow[]>();
    for (const part of params.parts) {
        const list = partsByMessage.get(part.message_id) ?? [];
        list.push(part);
        partsByMessage.set(part.message_id, list);
    }

    const messageIdToLastPiEntryId = new Map<string, string>();
    const orderedSourceMessageIds: string[] = [];

    let parentId = boundary.id as string;