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

djcb/mu

maildir indexer/searcher + emacs mail client + guile bindings observed · 2026-08-28

github.com/djcb/mu · homepage · C++ · GPL-3.0 (copyleft) observed · 2026-08-28

Health v2 · maintenance only

94/100

  • Activity 99
  • Release rhythm 84
  • Longevity 100

Flags: no_readme

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: 55.0
  • age_days: 5353
  • days_rel: 24
  • days_push: 7
  • n_releases_24m: 13

Full methodology

Adoption not part of the score

1718 stars · 407 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

mu is a set of command-line tools for indexing and searching email stored in the Maildir format on Unix-like systems. It also includes mu4e, an Emacs-based email client, and Guile/Scheme bindings for scripting.

Use cases

  • instantly find that one important email in a large maildir
  • index and search maildir email from the command line
  • read and manage email inside Emacs with mu4e
  • extract attachments from email messages
  • search messages by sender, date, size, flags, or attachments
  • script email handling with Guile/Scheme

When to avoid

  • you need a graphical email client
  • your mail lives on a proprietary server without local Maildir access
  • you need Windows-native support

Facets

cli-tool · maturity active

search-engine cli email email developer-tools bsd cli maildir mu4e emacs-mail-client guile-bindings full-text-search command-line linux macos emacs

2 sources

Member repositories

RepositoryRoleHealth v2
djcb/mumain94

For agents

markdown · JSON · MCP: product_card(name="djcb/mu")

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