Prove your opening position matches at cutover

**Objective:** Prove the Intacct opening position matches Dynamics GP at cutover: GP fiscal year `{fiscal-year}` through period `{period-id}` against Intacct through `{cutover-date}`, account by account.

**Step 1: GP balances**

Call `dynamics-gp-get-gl-account-summary` with `year` = `{fiscal-year}` (no `period-id` filter; filter locally). For each account:
* Balance sheet accounts (`posting-type` Balance Sheet): add `period-balance` for period 0 (the beginning balance) through `{period-id}`.
* Profit and Loss accounts: add `period-balance` for periods 1 through `{period-id}` (year to date).

Roll the results up by `main-account-segment`. Work in debit-positive amounts (debits positive, credits negative).

**Step 2: Intacct balances**

Call `intacct-get-account` to get each account's `account-type`. Then call `intacct-get-general-ledger-detail` per account (`account-number`), with `entry-date.to` = `{cutover-date}`:
* Balance sheet accounts: no start date.
* Income statement accounts: `entry-date.from` = the first day of the fiscal year. If `{fiscal-year}` is not a calendar year and the start date is not clear, ask the user for it.

Net `debit-amount` minus `credit-amount` per account.

**Step 3: Compare**

Pair GP main segment with Intacct `account-number` (exactly, then with leading zeros removed). Treat a difference under 0.01 as a match. First check that each side nets to zero overall; if one does not, say so before anything else, because the comparison below is then unreliable.

**Step 4: Report**

1. Totals: GP net, Intacct net, number of accounts matched, number different, number unmapped.
2. Differences, largest first: account, description, GP balance, Intacct balance, difference (GP minus Intacct).
3. Accounts with a GP balance but no Intacct account, and Intacct accounts with a balance but no GP segment.
4. If the differences net to zero and sit in one or two accounts, say that it looks like an offset posted to a clearing or retained earnings account.

**Rules & Guidelines:**

* Tools prefixed dynamics-gp- are on the dynamics-gp MCP server. Tools prefixed intacct- are on the intacct MCP server. Both servers must be connected; if a tool from either is missing, say which server is not connected and stop.
* Pass `{gp-company}` as `company` on every dynamics-gp- call (empty means the default GP company). Use the default Intacct company; if the Intacct side holds several entities and it is not clear which one received this GP company, ask before starting.
* Set `max-records` high (5000) on every list read. If a read returns exactly that many rows, say the result may be truncated and narrow the filter (per account, per vendor, per customer or per item) instead of reporting totals from it.
* Read only. Do NOT call `intacct-create-journal-entry`, `intacct-update-journal-entry` or `dynamics-gp-gl-account-transaction-add`. To correct a difference, use the post-conversion-balance-adjustment prompt.

**Validation:**

* If GP has no summaries for `{fiscal-year}`, list the years it does have and stop.
* If an account has so many Intacct lines that a read truncates, split it by month and add the months.
* Never compare GP full segmented account numbers against Intacct accounts directly; always roll up to the main segment first.