How Homebrew’s scores are calculated
The full audit trail, recomputed from the verdict data at build time through the same code that produced the leaderboard: verdict × quality × story weight per cell, cells sum to dimension scores, dimensions blend into the PA Score. Every number on the product page is reproducible from this page alone; for why the formula looks like this, see the methodology.
verdict factors: full ×1.0 · partial ×0.6 · disputed ×0.3 · none ×0.0 · n/a excluded from both sides · cell points = weight × quality × factor · cell max = weight × 10
PA Score28/100
Agent-ready 21.2 × 0.30 = 6.36
API quality 0.0 × 0.20 = 0.00
Openness 43.5 × 0.20 = 8.70
Built-in AI n/a — excluded, its ×0.15 weight renormalized away
Automation 59.3 × 0.15 = 8.89
(6.36 + 0.00 + 8.70 + 8.89) ÷ (0.30 + 0.20 + 0.20 + 0.15) = 23.95 ÷ 0.85 = 28.2 — weights renormalized over the scored components
Scores are stored to 1 decimal; the product page’s pills round to whole numbers for display. Each dimension below shows the stories, verdicts, and cited evidence behind its number.
Agent-ready21.2/100×0.30 of the PA blend
Outside-in: can YOUR agent reach and drive this product — API, MCP, CLI, headless runs, agent docs.
Point an agent at llms.txt or agent-oriented docsweight 2
2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max
- [probe] https://docs.brew.sh/llms.txt“PROBE llms.txt: HTTP 404 at https://docs.brew.sh/llms.txt”
- [probe] https://docs.brew.sh/openapi.json“PROBE openapi: all candidate paths 404 (https://docs.brew.sh/openapi.json, https://docs.brew.sh/swagger.json, https://docs.brew.sh/api/openapi.json, https://docs.brew.sh/.well-known/openapi.json)”
Run the product headlessly / in CI for automationweight 2
2 (weight) × 7 (quality) × 1.0 (full) = 14.0 of 20 max
- [claimed-docs] https://docs.brew.sh/Installation“prepend `NONINTERACTIVE=1` to the installation command”
- [claimed-docs] https://docs.brew.sh/Brew-Bundle-and-Brewfile“Adding a `Brewfile` to a project's repository (like you might a `package.json`, `Gemfile` or `requirements.txt`) is a nicer way of encoding project dependencies for developer environments.”
- [claimed-docs] https://docs.brew.sh/Brew-Bundle-and-Brewfile“Adding a `Brewfile` to a project’s repository (like you might a `package.json`, `Gemfile` or `requirements.txt`) is a nicer way of encoding project dependencies for developer environments.”
- [claimed-docs] https://docs.brew.sh/Brew-Bundle-and-Brewfile“Adding a `Brewfile` to a project's repository (like you might a `package.json`, `Gemfile` or `requirements.txt`) is a nicer way of encoding project dependencies”
- [claimed-docs] https://docs.brew.sh/Brew-Bundle-and-Brewfile“brew bundle check || brew bundle install”
- [claimed-docs] https://docs.brew.sh/Manpage“Run your shell in a `brew bundle exec` environment.”
- [probe] https://docs.brew.sh/Manpage“official CLI documented at https://docs.brew.sh/Manpage”
Plug MCP servers into this product so it can use their toolsweight 3
n/a — not applicable to this product: excluded from numerator and denominator
no evidence cited — the verdict rests on absence of evidence, re-checked on refresh
Connect an agent via an official MCP serverweight 3
3 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 30 max
- [probe] https://docs.brew.sh/llms.txt“PROBE llms.txt: HTTP 404 at https://docs.brew.sh/llms.txt”
- [probe] https://docs.brew.sh/openapi.json“PROBE openapi: all candidate paths 404 (https://docs.brew.sh/openapi.json, https://docs.brew.sh/swagger.json, https://docs.brew.sh/api/openapi.json, https://docs.brew.sh/.well-known/openapi.json)”
Use an official CLIweight 2
2 (weight) × 5 (quality) × 0.6 (partial) = 6.0 of 20 max
- [probe] https://docs.brew.sh/Manpage“official CLI documented at https://docs.brew.sh/Manpage”
- [claimed-docs] https://docs.brew.sh/Installation“prepend `NONINTERACTIVE=1` to the installation command”
- [probe] https://docs.brew.sh/llms.txt“PROBE llms.txt: HTTP 404 at https://docs.brew.sh/llms.txt”
Drive the product through a documented public APIweight 3
3 (weight) × 3 (quality) × 0.6 (partial) = 5.4 of 30 max
- [probe] https://docs.brew.sh/llms.txt“PROBE llms.txt: HTTP 404 at https://docs.brew.sh/llms.txt”
- [probe] https://docs.brew.sh/openapi.json“PROBE openapi: all candidate paths 404 (https://docs.brew.sh/openapi.json, https://docs.brew.sh/swagger.json, https://docs.brew.sh/api/openapi.json, https://docs.brew.sh/.well-known/openapi.json)”
- [probe] https://docs.brew.sh/Manpage“official CLI documented at https://docs.brew.sh/Manpage”
- [claimed-docs] https://docs.brew.sh/Manpage“Bundler for non-Ruby dependencies from Homebrew formulae, Homebrew casks, Mac App Store dependencies, VSCode (and forks/variants) extensions, Go packages, Cargo packages, uv tools, Flatpak packages, WinGet packages, Krew plugins and npm packages.”
Issue scoped/least-privilege API credentials for an agentweight 2
n/a — not applicable to this product: excluded from numerator and denominator
no evidence cited — the verdict rests on absence of evidence, re-checked on refresh
Build against official SDKsweight 2
n/a — not applicable to this product: excluded from numerator and denominator
no evidence cited — the verdict rests on absence of evidence, re-checked on refresh
Subscribe to events via webhooksweight 2
n/a — not applicable to this product: excluded from numerator and denominator
no evidence cited — the verdict rests on absence of evidence, re-checked on refresh
Agent-ready = 25.4 ÷ 120 × 100 = 21.2
API quality0.0/100×0.20 of the PA blend
The programmable surface once an agent is there — machine-readable spec, interactive docs, sandbox, versioning discipline.
Explore an interactive API reference with runnable examplesweight 2
n/a — not applicable to this product: excluded from numerator and denominator
no evidence cited — the verdict rests on absence of evidence, re-checked on refresh
Download a machine-readable API spec (OpenAPI or equivalent)weight 2
2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max
- [probe] https://docs.brew.sh/llms.txt“PROBE llms.txt: HTTP 404 at https://docs.brew.sh/llms.txt”
- [probe] https://docs.brew.sh/openapi.json“PROBE openapi: all candidate paths 404 (https://docs.brew.sh/openapi.json, https://docs.brew.sh/swagger.json, https://docs.brew.sh/api/openapi.json, https://docs.brew.sh/.well-known/openapi.json)”
Test against a sandbox environment without touching production dataweight 1
n/a — not applicable to this product: excluded from numerator and denominator
no evidence cited — the verdict rests on absence of evidence, re-checked on refresh
Rely on versioned APIs with a documented deprecation policyweight 2
n/a — not applicable to this product: excluded from numerator and denominator
no evidence cited — the verdict rests on absence of evidence, re-checked on refresh
API quality = 0.0 ÷ 20 × 100 = 0.0
Openness43.5/100×0.20 of the PA blend
Can you leave, inspect, or self-host — data export, open source, portability.
Do everything through the API that I can do in the UIweight 2
n/a — not applicable to this product: excluded from numerator and denominator
no evidence cited — the verdict rests on absence of evidence, re-checked on refresh
Export all of my data in open formats and leaveweight 3
3 (weight) × 7 (quality) × 1.0 (full) = 21.0 of 30 max
- [claimed-docs] https://docs.brew.sh/Brew-Bundle-and-Brewfile“`brew bundle dump` is Homebrew's installed-state snapshot command: it records supported installed formulae, casks, taps and other package types as a `Brewfile`.”
- [claimed-docs] https://docs.brew.sh/Brew-Bundle-and-Brewfile“`brew bundle dump` is Homebrew's installed-state snapshot command: it records supported installed formulae, casks, taps and other package types as a `Brewfile`”
- [claimed-docs] https://docs.brew.sh/Brew-Bundle-and-Brewfile“Adding a `Brewfile` to a project’s repository (like you might a `package.json`, `Gemfile` or `requirements.txt`) is a nicer way of encoding project dependencies for developer environments.”
- [claimed-docs] https://docs.brew.sh/Manpage“Bundler for non-Ruby dependencies from Homebrew formulae, Homebrew casks, Mac App Store dependencies, VSCode (and forks/variants) extensions, Go packages, Cargo packages, uv tools, Flatpak packages, WinGet packages, Krew plugins and npm packages.”
- [claimed-docs] https://docs.brew.sh/Brew-Bundle-and-Brewfile“You can check if a `brew bundle install` will do anything by running: $ brew bundle check”
Read the product's source under an open licenseweight 2
2 (weight) × 4 (quality) × 0.6 (partial) = 4.8 of 20 max
- [github] https://github.com/Homebrew/brew“perform a strict audit on a package you use e.g. `brew audit --strict ffmpeg` for FFmpeg”
Self-host the core productweight 3
3 (weight) × 5 (quality) × 0.6 (partial) = 9.0 of 30 max
- [claimed-docs] https://docs.brew.sh/Taps“The `brew tap` command adds repositories that Homebrew can use for formulae, casks and external commands.”
- [claimed-docs] https://docs.brew.sh/Taps“`brew tap <user>/<repository>` clones `https://github.com/<user>/homebrew-<repository>` into Homebrew’s tap directory.”
- [claimed-docs] https://docs.brew.sh/Taps“`brew tap <user>/<repository>` clones `https://github.com/<user>/homebrew-<repository>` into Homebrew's tap directory”
- [community] https://news.ycombinator.com/item?id=48490024“User who tried hosting a Homebrew tap found it much harder than hosting apt/yum repos, since it requires running a git server rather than just a static file host with a CDN.”
Openness = 34.8 ÷ 80 × 100 = 43.5
Built-in AIn/a×0.15 of the PA blend
Inside-out: how agentic the product itself is for its users — built-in assistants, autonomous features.
Get AI-generated insights and suggestions from my data inside the productweight 2
n/a — not applicable to this product: excluded from numerator and denominator
no evidence cited — the verdict rests on absence of evidence, re-checked on refresh
Set up automations that run autonomously in the backgroundweight 2
n/a — not applicable to this product: excluded from numerator and denominator
no evidence cited — the verdict rests on absence of evidence, re-checked on refresh
Delegate tasks to a built-in AI assistant inside the productweight 3
n/a — not applicable to this product: excluded from numerator and denominator
no evidence cited — the verdict rests on absence of evidence, re-checked on refresh
Operate the product with natural-language commandsweight 2
n/a — not applicable to this product: excluded from numerator and denominator
no evidence cited — the verdict rests on absence of evidence, re-checked on refresh
every cell n/a — unscored (not zero), excluded from the blend
Automation59.3/100×0.15 of the PA blend
Depth of automation primitives — rules, scheduling, bulk operations, webhooks.
Perform bulk operations across many items at onceweight 2
2 (weight) × 8 (quality) × 1.0 (full) = 16.0 of 20 max
- [claimed-docs] https://docs.brew.sh/Brew-Bundle-and-Brewfile“`brew bundle dump` is Homebrew's installed-state snapshot command: it records supported installed formulae, casks, taps and other package types as a `Brewfile`.”
- [claimed-docs] https://docs.brew.sh/Manpage“Bundler for non-Ruby dependencies from Homebrew formulae, Homebrew casks, Mac App Store dependencies, VSCode (and forks/variants) extensions, Go packages, Cargo packages, uv tools, Flatpak packages, WinGet packages, Krew plugins and npm packages.”
- [claimed-docs] https://docs.brew.sh/Brew-Bundle-and-Brewfile“You can check if a `brew bundle install` will do anything by running: $ brew bundle check”
- [claimed-docs] https://docs.brew.sh/Brew-Bundle-and-Brewfile“brew bundle check || brew bundle install”
- [claimed-docs] https://docs.brew.sh/Brew-Bundle-and-Brewfile“this will take instructions from the Brewfile to run brew install ruby and install Ruby if needed”
- [claimed-docs] https://docs.brew.sh/Installation“prepend `NONINTERACTIVE=1` to the installation command”
- [community] https://news.ycombinator.com/item?id=48490024“User reports that 'brew upgrade' started updating ALL casks, even ones marked 'auto_updates: true' in the Cask JSON API, calling it new default behavior that didn't used to happen.”
- [community] https://news.ycombinator.com/item?id=48490024“User asks: "Does homebrew still do that insane thing when you want to upgrade a single package it tells you 'hold my beer' and starts installing postgres and some obscure python version?"”
Define rules that trigger actions automatically on eventsweight 3
n/a — not applicable to this product: excluded from numerator and denominator
no evidence cited — the verdict rests on absence of evidence, re-checked on refresh
Schedule recurring jobs or workflowsweight 2
n/a — not applicable to this product: excluded from numerator and denominator
no evidence cited — the verdict rests on absence of evidence, re-checked on refresh
Version, review, and roll back my automationsweight 1
1 (weight) × 3 (quality) × 0.6 (partial) = 1.8 of 10 max
- [claimed-docs] https://docs.brew.sh/Brew-Bundle-and-Brewfile“Adding a `Brewfile` to a project's repository (like you might a `package.json`, `Gemfile` or `requirements.txt`) is a nicer way of encoding project dependencies for developer environments.”
- [claimed-docs] https://docs.brew.sh/Brew-Bundle-and-Brewfile“`brew bundle dump` is Homebrew's installed-state snapshot command: it records supported installed formulae, casks, taps and other package types as a `Brewfile`.”
- [claimed-docs] https://docs.brew.sh/Brew-Bundle-and-Brewfile“You can check if a `brew bundle install` will do anything by running: $ brew bundle check”
- [community] https://news.ycombinator.com/item?id=48490024“User requests a better rollback mechanism, having broken their home server multiple times with bad InfluxDB/Grafana updates via Homebrew; now disables cleanup to keep old versions as a workaround.”
Automation = 17.8 ÷ 30 × 100 = 59.3