Task Examples

The examples/ directory contains ready-to-run task configurations spanning optimization, ML, and math.

Circle Packing

Goal: Pack 26 circles into a unit square to maximize the sum of radii.

task:
  name: "Circle Packing"
  description: |
    Pack N = 26 circles into a unit square (side length 1)
    to maximize the sum of radii.
  files:
    - "initial_program.py"

grader:
  timeout: 600
  direction: maximize

agents:
  count: 2
  model: claude-sonnet-4-6

What agents work on: Implementing optimization algorithms (simulated annealing, basin-hopping, gradient descent) to find the densest packing.

Score: sum_radii / best_known_result — 1.0 means matching the best known configuration.

coral start -c examples/circle_packing/task.yaml

Erdos

Goal: Explore mathematical conjectures related to Erdos problems.

What agents work on: Generating counterexamples or proofs for combinatorial conjectures.

coral start -c examples/erdos/task.yaml

Kernel Builder

Goal: Optimize VLIW SIMD kernels for minimum cycle count.

What agents work on: Assembly-level optimization, instruction scheduling, register allocation.

coral start -c examples/kernel_builder/task.yaml

Kernel Engineering

Goal: Optimize GPU kernel implementations for maximum throughput.

Score: 1000 / runtime_us — lower kernel runtime = higher score.

coral start -c examples/kernel_engineering/trimul/task.yaml

MNIST

Goal: Build an ML classifier for handwritten digits.

What agents work on: Neural network architecture, training procedures, data augmentation.

coral start -c examples/mnist/task.yaml

Spaceship Titanic

Goal: Kaggle-style classification competition.

Score: Classification accuracy (0.50 = naive, 0.80+ = strong).

coral start -c examples/spaceship_titanic/task.yaml

Stanford COVID Vaccine

Goal: Predict mRNA degradation rates.

What agents work on: Feature engineering, model selection, sequence analysis.

coral start -c examples/stanford_covid_vaccine/task.yaml

Creating your own

To create a new task from scratch:

coral init my-task

This scaffolds the directory structure. See Quick Start and Writing a Custom Grader for the full walkthrough.