Bid placement: a successful bid with no confirmation

The bug Kane CLI caught

The failure lands on step three, after the minimum bid validation has already been proven to work:

• What Kane CLI observed - the final verification could not find "Bid placed" with an amount of $90.00 on the page.
• The verdict - a successful bid lacks placement confirmation.
• The classification - application_issue, functional_defect, at confidence 0.91.

The word "successful" in that verdict is doing real work. Kane CLI did not conclude the bid failed. It concluded the bid succeeded and the confirmation was missing, which is a different bug with a different owner and a different fix.

The flow under test

Step two is what makes the finding trustworthy. It proves the bid form validates correctly by submitting $83 against an $84.50 minimum and asserting the exact error, so the form is known to be working before the valid bid is attempted.

---
mode: testing
url: https://my-testing-repo-main.vercel.app/ebay-clone-app?reset=true
max_steps: 40
tags: [ebay, auction, bidding]
---

# eBid 6.1: Bid placement

Catalog objective: place a bid above the current price on an auction listing.
Key assertion: the bid is registered and the user is shown as high bidder.

## Open an auction listing
Click "Vintage Rangefinder Camera 35mm" and verify the listing shows a current bid of "$82.00", "7" bids and high bidder "m_torres".

## Reject a bid below the minimum
Type "83" into the bid field, click "Place bid", and verify an error appears reading "Your bid must be at least $84.50."

## Place a winning bid
Clear the bid field, type "90", click "Place bid", and verify the page shows "Bid placed" with an amount of "$90.00".

## Confirm the bid is recorded
Click "My eBid" and verify the bids list shows "Vintage Rangefinder Camera 35mm" at "$90.00" with status "High bidder".

Step four then confirms the bid reached the account page at $90.00 with status High bidder. That step passed, which is how the defect is known to be cosmetic rather than functional at the data layer. Reproduce it with:

kane-cli testmd run tests/ebay/bid-placement_test.md

How the failure surfaced

The result file carries the contradiction in plain sight: a failed confirmation assertion followed by a passing assertion that the bid was recorded.

---
test: ../bid-placement_test.md
status: failed
started: 2026-09-15T10:15:48.578Z
duration_s: 161
session_id: d4e937a9-6c8d-49e7-a01d-5b91cf3253d2
---

# eBid 6.1: Bid placement - Result

## Open an auction listing ✓ passed (53.9s)
md5: ac6dc6b665c010f0fff2883d3eab891e
Click "Vintage Rangefinder Camera 35mm" and verify the listing shows a current bid of "$82.00", "7" bids and high bidder "m_torres".

## Reject a bid below the minimum ✓ passed (37.7s)
md5: b83a92002b4d1a5f82449772fd01bcd6
Type "83" into the bid field, click "Place bid", and verify an error appears reading "Your bid must be at least $84.50."

## Place a winning bid ✗ failed (67s)
md5: bcf7bdbb7419e3e08f1d430e606a663f
Reason: Final verification failed: "the page shows "Bid placed" with an amount of "$90.00"" - bug verdict: Successful bid lacks placement confirmation [application_issue/functional_defect, confidence 0.91]
Clear the bid field, type "90", click "Place bid", and verify the page shows "Bid placed" with an amount of "$90.00".

## Confirm the bid is recorded ✓ passed ( - )
md5: 93aa88a3efa1f7def07ffaa187c1a36d
Click "My eBid" and verify the bids list shows "Vintage Rangefinder Camera 35mm" at "$90.00" with status "High bidder".

Reading those two steps together is what turns a red run into a precise ticket. The bid is in the system. The listing page did not acknowledge it. A tester watching this by hand would probably have refreshed, seen the bid, and closed the bug as not reproducible.

Acting on the verdict

What you can hand an engineer is the reproduction, the point of failure, the evidence that the write succeeded, and a classification that says the fault is in the product. The fix is a confirmation state on the listing page, and this same file verifies it.

Auction and offer flows are full of this pattern, where the write lands and the interface does not update. Evidence based QA covers keeping that proof attached to the ticket, and NDJSON agent mode covers routing verdicts like this one automatically in CI.