Module doctor 

The prerequisite walkthrough, mechanized — and the knowledge every other verb inlines into its own failures.

One table describes every tool a Frame application depends on: what it is, which command proves it, and where to install it. frame doctor walks the whole table; every other verb asks require for exactly the subset it is about to use, so a missing tool surfaces at the earliest, most fixable moment as a typed refusal carrying its install link — a raw “command not found” never reaches the user.

Structs

MissingTools

Every tool a verb needs but the machine lacks, with install links — batched so one refusal names every gap instead of dribbling them out.

Tool

One prerequisite tool: its user-facing name, the command that proves it, and the install link a refusal carries.

Constants

CHROME_INSTALL

Install link a missing-Chrome refusal carries.

Statics

ALL_TOOLS

The whole walkthrough, in the order the doctor reports it.

BUILD_PREREQUISITES

Tools frame run and frame build refuse without: the host build chain only — a fresh scaffold’s page is already compiled, so Node enters only when page sources change.

CHECK_PREREQUISITES

Tools frame check refuses without.

ERLANG

Erlang/OTP: the VM toolchain Gleam compiles through.

GLEAM

Gleam: compiles and tests the application’s component.

NEW_PREREQUISITES

Tools frame new refuses without: everything the generated application needs to build, verify, and run.

NODE

Node.js: typechecks the page and drives the browser proof.

NPM

npm: installs the page’s type and proof toolchain.

RUST

The Rust toolchain: builds and tests the application’s host.

Functions

probe

Probes one tool and returns the first line of its version report.

require

Requires every listed tool, batching all gaps into one typed refusal.

require_chrome

Resolves the installed Chrome the browser proof drives: CHROME_BIN when set, the default macOS installation path otherwise.

warn_if_chrome_missing

Warns loudly (without refusing) when Chrome is missing: creating, building, and running an application need no browser, but frame test’s default verdict includes the real-browser proof and will refuse until one is installed.