Ross ROSS = Recommend OSS · open-source software intelligence for agents

aosabook/500lines resource

500 Lines or Less observed · 2026-08-28

github.com/aosabook/500lines · JavaScript · NOASSERTION (other) observed · 2026-08-28

Health v2 · maintenance only

32/100

  • Activity 0
  • Release rhythm 35
  • Longevity 100

Flags: no_releases no_license

How is this computed?

round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.

  • gap_med: n/a
  • age_days: 4686
  • days_rel: n/a
  • days_push: 1110
  • n_releases_24m: 0

Full methodology

Adoption not part of the score

29574 stars · 5811 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

The source repository for the book '500 Lines or Less', the fourth volume in the Architecture of Open Source Applications series. Each chapter walks through a small program (at most 500 lines of code) that solves a canonical software engineering problem, explaining design decisions and tradeoffs.

Use cases

  • learn how compilers, databases, and spreadsheets work by reading small implementations
  • study software architecture and design tradeoffs
  • find educational code examples for teaching programming
  • understand how experienced engineers structure small programs
  • learn by reading well-crafted minimal codebases

When to choose

  • you want to learn software design through small, readable real examples
  • you are teaching or self-studying software architecture
  • you want canonical problems (compilers, databases, spreadsheets) explained from scratch

When to avoid

  • you need production-ready, maintained software
  • you want comprehensive large-scale system documentation
  • you need a library or tool to integrate into a project

Facets

learning-resource · maturity maintenance

developer-tools documentation education developer-tools tutorials programming-languages cross-platform book open-source-architecture software-design educational-code aosa

1 source

Member repositories

RepositoryRoleHealth v2
aosabook/500linesmain32

For agents

markdown · JSON · MCP: product_card(name="aosabook/500lines")

Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem