Grok 4.6 on Rename an API without breaking callers

Passed in 32s. Attempt 2. Run 20260904T133248Z-grok-4-6-refactor-rename-api-2.

Task

Rename the ledger API safely

Refactor this Node project so lib/ledger.js uses record and list instead of postEntry and getEntries.

Keep postEntry only as the deprecated compatibility shim marked // keep in lib/ledger.js; the shim must delegate to record. Remove getEntries. Update every project call site to the new names. Delete lib/legacy.js and its sole caller, src/legacy-report.js.

Do not add dependencies. The required output is the updated project, with this command green:

node --test test/*.test.js

Command

grok -m grok-4.6 --output-format plain --always-approve -p 'You are working in the current folder. Do the task in TASK.md and write the outputs to the exact paths it names.
Do not ask questions. When done, stop.

# Rename the ledger API safely

Refactor this Node project so `lib/ledger.js` uses `record` and `list` instead of `postEntry`
and `getEntries`.

Keep `postEntry` only as the deprecated compatibility shim marked `// keep` in
`lib/ledger.js`; the shim must delegate to `record`. Remove `getEntries`. Update every project
call site to the new names. Delete `lib/legacy.js` and its sole caller, `src/legacy-report.js`.

Do not add dependencies. The required output is the updated project, with this command green:

` ` `sh
node --test test/*.test.js
` ` `'

Output

I'll start by reading TASK.md and looking at the project so I can rename the ledger API without breaking callers.I'll read the ledger module, tests, and every file that still calls the old names.Call sites are clear. I'll read the remaining source files, then switch them to `record`/`list` and drop the legacy files.Updating the ledger API, switching every call site, and deleting the two legacy files.Checking leftover old names, then running the tests.The ledger API now uses `record` and `list`.

`postEntry` is only a deprecated shim that calls `record`. `getEntries` is gone. Call sites in the project use the new names. The two leftover files are deleted.

`node --test test/*.test.js` is green.

Files produced

lib/ledger.js

import { assertAccount, assertAmount } from "./validate.js";
import { makeId } from "./ids.js";

const entries = [];

export function record(account, amount, memo = "") {
  assertAccount(account);
  assertAmount(amount);
  const entry = { id: makeId(entries.length + 1), account, amount, memo };
  entries.push(entry);
  return { ...entry };
}

export function list(account) {
  return entries.filter((entry) => entry.account === account).map((entry) => ({ ...entry }));
}

// keep
export function postEntry(account, amount, memo = "") {
  return record(account, amount, memo);
}

export function resetForTests() {
  entries.length = 0;
}

lib/legacy.js

[deleted]

src/account-summary.js

import { list } from "../lib/ledger.js";

export function accountSummary(account) {
  const rows = list(account);
  return { account, count: rows.length, total: rows.reduce((sum, row) => sum + row.amount, 0) };
}

src/audit.js

import { list } from "../lib/ledger.js";

export function auditAccount(account) {
  return list(account).map(({ id, memo }) => `${id}:${memo}`);
}

src/cli.js

import { list, record } from "../lib/ledger.js";

export function runCommand(name, account, amount) {
  if (name === "record") return record(account, amount, "cli");
  if (name === "list") return list(account);
  throw new Error(`unknown command: ${name}`);
}

src/import-invoices.js

import { record } from "../lib/ledger.js";

export function importInvoices(invoices) {
  return invoices.map((invoice) => record("receivable", invoice.total, invoice.id));
}

src/legacy-report.js

[deleted]

src/month-close.js

import { list } from "../lib/ledger.js";

export function monthClose(account) {
  const total = list(account).reduce((sum, entry) => sum + entry.amount, 0);
  return Object.freeze({ account, total });
}

src/refund.js

import { record } from "../lib/ledger.js";

export function refund(amount, reference) {
  return record("refunds", -amount, reference);
}

Checker

{"passed": true, "score": 1.0, "notes": "all refactor checks passed; node: \u2139 duration_ms 34.943875"}

Judge

Not used for this task.