install

Additional install commands

macOS

Homebrewverified · 100%

brew install smlfmt

local Homebrew formula metadata

Linux

Nixverified · 92%

nix profile install nixpkgs#smlfmt

nixpkgs package indexes · pkgs/by-name/sm/smlfmt/package.nix · source: api.github.com

overview

Package summary

Custom parser and code formatter for Standard ML

Project links

Commands and aliases

smlfmt

history

Project history and usage

smlfmt is a command-line parser and formatter for Standard ML. It is a niche but package-manager-relevant developer tool because it brings modern formatter workflows, including check mode and whole-project formatting, to an older ML-family language ecosystem.

Project history

The official README describes smlfmt as a custom parser and code formatter for Standard ML, fast enough for large projects and used to format its own source tree. The repository release list and README record v1.0.0 in January 2023, v1.2.0 in May 2025, and v1.3.0 in January 2026.

Adoption history

The supplied package metadata shows smlfmt packaged in Homebrew and Nix, a typical adoption path for smaller language tooling. Its README targets command-line workflows rather than editor-only integration, including stdin/stdout use, CI-friendly checking, and `.mlb` whole-project formatting.

How it is used

Users build it with MLton, format `.sml` files in place, pipe code through stdin/stdout, or pass an `.mlb` file to format many files. Options include `--preview`, `--preview-only`, `--read-only`, `--check`, width and indentation controls, and SuccessorML syntax toggles.

Why package nerds care

Package maintainers care because smlfmt packages a language-specific formatter with MLton build requirements, command-line formatting semantics, and CI use through `--check`. It fills the same ergonomic role for Standard ML that formatter packages do for larger language ecosystems.

Timeline

2023: v1.0.0 release published on GitHub.
2025: README records v1.2.0 release on May 2, 2025.
2026: README and release list record v1.3.0 on January 1, 2026.

Related projects

The README references MLton, MLBasis path maps, Emacs integration through `smlfmt.el`, SuccessorML syntax extensions, and hyperfine for timing measurements.

Sources

GitHub releases API for shwestrick/smlfmt: first listed release v1.0.0 on 2023-01-10.
https://github.com/shwestrick/smlfmt README: formatter purpose, features, release notes, build/run examples, options, performance notes.
input source_facts.package-manager: Homebrew and Nix package names.

security posture

Risk level: green

narrow executable package without higher-risk signals.

Risk classifier

green risk · low confidence · appliance

Why

narrow executable package without higher-risk signals

Signals

metadata:no-higher-risk-signals

Install behavior

No Homebrew post-install hook is recorded in formula metadata.
Homebrew bottle metadata is available for 6 platform targets.
Installs with 1 runtime dependencies.
Build metadata lists 1 build dependencies.

Recommended review

Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.

executables

Installed executables

Command	Kind	Exposure	Note
`smlfmt`	cli	global executable

freshness

Version and freshness

These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.

page generated2026-07-08

manager version1.3.0

manager updated2026-06-14

local dataok

upstreamcurrent

latest detectedv1.3.0

https://github.com/shwestrick/smlfmt

okNo freshness warnings were generated.

install metadata

Package metadata

Package key	brew:smlfmt
Version	1.3.0
Package manager	Homebrew
Package manager page	https://formulae.brew.sh/formula/smlfmt
Homepage	https://github.com/shwestrick/smlfmt
Repository	https://github.com/shwestrick/smlfmt
Upstream docs	https://github.com/shwestrick/smlfmt#readme
License	MIT
Source archive	https://github.com/shwestrick/smlfmt/archive/refs/tags/v1.3.0.tar.gz
Last updated	2026-06-14T15:13:50+02:00
Pulse	updated
Dependencies	gmp
Build dependencies	mlton
Bottle	available (on arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, x86_64_linux)
Homebrew post-install	not defined
Service	none declared

registry facts

Source database details

Source Database	Homebrew formula API
Tap	homebrew/core
Full Name	smlfmt
Version Scheme	0
Revision	0
Head Version	HEAD
Bottle Stable Root URL	https://ghcr.io/v2/homebrew/core
Deprecated	no
Disabled	no
Keg Only	no
URL Keys	head stable

source database matches

Other package-manager records

Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.

Nix95%

smlfmt

nix profile install nixpkgs#smlfmt

normalized package name match
Matched by: Smlfmt

nixpkgs package indexes · api.github.com · nixpkgs package indexes: pkgs/by-name/sm/smlfmt/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1

package graph

Links come from deterministic package relationships, av.db category and tag curation, ecosystem matches, and package hub membership.

source trail

Generated from repository data

This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.

Combined YAML source

View the package source record on GitHub.

combined/smlfmt.yml

Used sources

Geiger risk classifier
Nucleus package database
av.db category and tag curation
cross-ecosystem install command graph
curated package history
external package-manager database matches
package relationship graph
package version freshness
package-page enrichment

Install smlfmt with Homebrew, Nix