AdventOfCode

My contributions to the advent of code puzzles.

Usage

Put your adventofcode.com session cookie in .env as AOC_SESSION=<cookie>, or export it. Then, from the repository root:

go run ./cmd/aoc new                # scaffold today's puzzle and download its input
go run ./cmd/aoc new -y 2025 -d 10  # scaffold a specific day
go run ./cmd/aoc fetch              # regenerate any missing puzzle.go files
go run ./2025/Day10                 # run a solution
go test ./2025/Day10                # check its answers
go test -bench=. ./2025/Day10       # benchmark it

new never overwrites existing files. The first code block on the puzzle page becomes Test1, so check that it is the right example. Fill in the expected answers in puzzle.go; a value left as "" is not checked.

Puzzle inputs live in puzzle.go and are gitignored.