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Legacy scores
CHALLENGES—120 bugs · 30 challenges · 14 playgrounds

Hunt the bugs. Score the reports.

Each challenge points you at a broken surface in a playground: file a bug report and get graded.

PLAYGROUND
DIFF
#TitlePlaygroundDifficultySeverityGlobal %Score
01
Legacy Shop: Product Listing Bugs
uilistingdata
Legacy
Easy— in plain sightMED
33%
—
02
Find the stale cart count
stateui
Legacy
Easy— in plain sightHIGH
100%
—
03
Auth endpoint accepts invalid credentials
contractsecurity
API
Medium— bring toolsHIGH——
04
Order history sorts as string
sortingdata
Legacy
Easy— in plain sightMED——
05
Modal does not trap focus
a11ykeyboard
A11Y
Easy— in plain sightHIGH
100%
—
06
Cart accepts negative quantity
validation
Legacy
Easy— in plain sightHIGH——
07
PRODUCT_VIEWED payload drops productId
eventspipeline
Events
Medium— bring toolsHIGH
100%
—
08
Price mismatch list ↔ detail
dataui
Legacy
Easy— in plain sightHIGH——
09
GET /products leaks inactive items
contractdata
API
Medium— bring toolsMED
100%
—
10
Race: cart count beats POST /cart
racetiming
Flaky
Hard— bring patienceHIGH——
11
LCP > 4.2s on /products
perfCWV
Perf
Hard— bring patienceMED
100%
—
12
Tone drifts under 7B model
evalregression
AI
Hard— bring patienceMED——
13
Touch target on stepper < 32px
mobilea11y
Mobile
Easy— in plain sightLOW
100%
—
14
Filter UI ≠ filtered results
state
Legacy
Medium— bring toolsMED——
15
ORDER_SUBMITTED on payment failure
eventsdata
Events
Hard— bring patienceHIGH——
16
Grid collapses early on tablet
responsive
Legacy
Easy— in plain sightLOW——
17
Aggregate ship/no-ship recommendation
capstone
Release
Capstone— bring judgmentHIGH
100%
—
18
Card copy drifts from playground metadata
copydata
Homepage
Easy— in plain sightMED
100%
—
19
Homepage CTA fires analytics with the wrong payload
analyticsevents
Homepage
Medium— bring toolsMED——
20
Prompt injection slips past the AI safety guard
aisecurity
AI
Hard— bring patienceHIGH
100%
—
21
Mobile search input vanishes under sticky nav
mobileresponsive
Mobile
Medium— bring toolsHIGH——
22
Release confidence score green-lights a risky deploy
releasestate
Release
Hard— bring patienceHIGH——
23
QualityChart patient portal — FE bug hunt
fhirehra11y
Health
Medium— bring toolsHIGH——
24
FHIR R4 services — Interconnect bug hunt
fhirehrapi
Health
Medium— bring toolsHIGH——
25
Ambient AI note drafting — grounding bug hunt
fhirehrai
Health
Medium— bring toolsHIGH——
26
HL7 → FHIR pipeline — Bridges bug hunt
fhirehretl
Health
Medium— bring toolsHIGH——
27
TapTrust Federal client app — transfer bug hunt
transfersstateprecision
Banking
Medium— bring toolsHIGH——
28
TapTrust Federal teller console — ledger + approval bug hunt
ledgerauthzcaching
Banking
Medium— bring toolsHIGH——
29
Quality Mart checkout — pricing, tax, and coupon bug hunt
Other
Medium— bring toolsMED——
30
Quality Mart cart & orders — concurrency and authorization bug hunt
Other
Medium— bring toolsMED——