[Param-Harrison]

What was wrong

splitCents rounded every share down and threw away the remainder. Splitting 1000 cents among 3 members gave 333/333/333, which adds up to 999, so one cent was lost.

The fix

• src/money/cents.ts: splitCents now follows the remainder rule in .claude/skills/handling-money/references/rules.md. It computes base = floor(total / n) and remainder = total - base * n, and the first remainder members, in the order passed in, get base + 1. The shares now always add up to the total. Negative totals work too: -1000 split 3 ways gives -333, -333, -334. I replaced the old "SEEDED DEFECT" doc comment with a description of the rule.
• tests/routes.test.ts: I removed a comment that described the remainder bug as still open. The reviewer flagged it.

No caller needed changing: createExpense in src/expenses.ts stores whatever splitCents returns.

The test

I added two tests to tests/money.test.ts:

• gives the leftover cent to the first member (issue #178): splitCents(1000, ["a","b","c"]) returns {a:334, b:333, c:333}, which adds up to 1000.
• gives leftover cents to the first N members in order: splitCents(1001, ["a","b","c"]) returns {a:334, b:334, c:333}, which adds up to 1001.

Both failed before the fix, because they got 333/333/333. After it, bun test passes: 43 tests, 0 failures. I did not run the issue's check-cents.ts script because the session's permission mode blocked the command.

Review

The code-reviewer subagent approved the change. It worked through the cases by hand and did not run the tests. Its notes:

• Fixed in this PR: the outdated comment in tests/routes.test.ts.
• Not fixed here (they predate this change): splitCents doesn't check its input. If a member id appears twice, both shares land on one key and cents are lost. A total with a fraction of a cent, such as 10.5, gives shares that don't add up to it. Each is worth its own issue.

🤖 Generated with Claude Code

Fixes #178

[Param-Harrison]

Closing as stale: superseded by the current factory runs; the issue stays open to be re-run.