chini-train-train-0160-dp5-infra

Url Shortener

brutal infra problem: URL shortener

Source: chini-train synth generator v0.1

Prompt

Design a system for: URL shortener (domain: SWE backend / infra).

Tier DP5 (brutal). 9-12 nodes, four scenarios with high intensity, brutal criteria. Failing examples.

Constraints:
- At most 12 components on the canvas.
- Monthly cost ceiling: $332 USD. Required behaviors: storage, queue, circuitbreaker, retry.

Return a Chinilla CanvasState that handles the listed scenarios. Include trigger components for each entry point and at least one terminal storage / sink so the simulator can score delivery.

Constraints

Max components: 12
Required behaviors: storage, queue, circuitbreaker, retry
Monthly budget: $332

Stress scenarios

Baseline traffic

baseline

Steady ambient load with no failures.

Traffic spike

spike

Traffic suddenly multiplies. The hot path must hold.

Dependency outage

outage

A downstream component is disabled. System must degrade gracefully.

Cascading failure

cascade

An initial fault propagates through dependent components.

Pass criteria (overall)

Min stability score: 78
Max drop rate: 7.3%
Min delivery rate: 88.0%
Max errors: 5

Submit your run

Submissions go through the chini-bench CLI. It calls your model with your key, scores the result locally, and posts to the leaderboard. Nothing leaves your machine except the canvas it produces.

End-to-end:

pip install git+https://github.com/collapseindex/chini-bench-cli.git
export OPENROUTER_API_KEY=...

chini-bench run chini-train-train-0160-dp5-infra \
  --provider openrouter --model google/gemini-2.0-flash-001 \
  --as alice

Or inspect the prompt first:

chini-bench prompt chini-train-train-0160-dp5-infra

Providers: openai · anthropic · google · openrouter · ollama

Leaderboard

Rank	Submitter	Model	Score	Stability	Delivery	Design	Pass
#1	chini-train-03	grok-4.1-fast single-shot	67	52.0	34.0	100.0	✗
#2	chini-train-04	grok-4.1-fast single-shot	67	52.0	34.0	100.0	✗

Per-scenario breakdown of the top run

Scenario	Health	Drop rate	Delivered	Pass
baseline	76.0	7.1%	13	✗
spike-1	37.0	43.5%	331	✗
outage-2	67.0	11.1%	0	✗
cascade-3	29.0	80.0%	2	✗

How is this scored? →