# 9fans/plan9port

Plan 9 from User Space

Repository: https://github.com/9fans/plan9port
Canonical: https://ross.abutalabs.com/products/plan9port
Homepage: https://9fans.github.io/plan9port/
Language: C
License: NOASSERTION
License Family: other
Last push: 2026-08-26T11:06:27+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 4322, "days_push": 7, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1941, forks 381 (observed 2026-08-28T04:05:57.477327+00:00)

## What it is
Plan 9 from User Space (plan9port) is a port of many Plan 9 libraries and programs from their native Plan 9 environment to Unix-like operating systems. It provides tools such as the rc shell, mk build tool, acme editor, and Plan 9 C libraries on Linux, macOS, and the BSDs.

## Use cases
- run the rc shell and Plan 9 utilities on Linux or macOS
- use the acme text editor on Unix
- build software with the mk build tool
- develop C programs using Plan 9 libraries on Unix
- experiment with Plan 9 userland without installing Plan 9
- use Plan 9 man pages and tools on a BSD system

## When to choose
- you want Plan 9 tools like rc, mk, or acme on a Unix-like OS
- you develop or study Plan 9-style software without native Plan 9 hardware
- you prefer the Plan 9 C library and threading model on Unix

## When to avoid
- you need a full Plan 9 operating system or kernel
- you want mainstream, well-documented Unix tooling for production teams
- you are unfamiliar with Plan 9 conventions and just need standard Unix tools

## Facets
- artifact type: library
- maturity: maintenance
- function: developer-tools, cli, compiler, interpreter, file-system, concurrency
- domain: operating-systems, developer-tools, cross-platform
- platform: bsd, cli, cross-platform
- tags: plan9, plan9port, unix-port, bell-labs, acme, rc-shell, mk, 9p, command-line, linux, macos, unix

## Member repositories
- 9fans/plan9port (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:57.477327+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:08:05.286547+00:00, confidence not recorded.
  - readme: https://github.com/9fans/plan9port (fetched 2026-08-28T04:05:57.477327+00:00, sha 7dd629be1292)
  - homepage: https://9fans.github.io/plan9port/ (fetched 2026-08-29T10:47:11.713884+00:00, sha 6693af575912)
- Data as of 2026-08-30T08:39:29.467469+00:00.