Crate proofsheet_core 

proofsheet-core

Local-first browser control for two jobs that turn out to be the same job: producing store-ready screenshots at exact dimensions, and running deterministic tests against a real browser.

Both need the same three things — a driver, a way to make the page stop being nondeterministic, and a record of what happened that can be checked later. So they share one core.

Design commitments

• The model never authors code or selectors. Actions are typed; the runtime composes them. A free-text field in a tool schema is grammar-constrained to any text, so the field is removed rather than validated after the fact.
• Output pixels are the source of truth. Stores specify pixels; the viewport is derived. See device.
• Determinism is injected, not hoped for. See determinism.
• Nothing is claimed without a negative control. A check that cannot fail on correct input is not evidence.

Dependencies

Deliberately small. No async runtime, no browser automation framework: a tool people install should not drag a dependency tree behind it.

Re-exports

pub use capture::capture;

pub use capture::Capture;

pub use capture::CaptureRequest;

pub use capture::Environment;

pub use capture::Stability;

pub use cdp::find_browser;

pub use cdp::Browser;

pub use cdp::LaunchOptions;

pub use determinism::Determinism;

pub use device::builtin;

pub use device::by_id;

pub use device::for_store;

pub use device::Device;

pub use device::Platform;

pub use device::Requirement;

pub use device::Store;

pub use error::Error;

pub use error::Result;

pub use install::install_browser;

pub use install::managed_root;

pub use progress::Collector;

pub use progress::DeviceEvent;

pub use progress::Outcome;

pub use progress::Progress;

pub use progress::Silent;

pub use progress::Summary;

pub use progress::Tally;

pub use run::run;

pub use run::DeviceResult;

pub use run::RunOptions;

pub use run::RunReport;

Modules

capture

Capturing one image, at exactly the size a store demands.

cdp

Launching a headless Chromium and speaking the DevTools Protocol to it.

determinism

The determinism preamble.

device

Device presets.

error

install

Downloading a known-good browser.

png

Just enough PNG to verify what the browser handed back.

progress

Progress reporting.

run

Driving a whole capture matrix.

Constants

VERSION

The crate version, surfaced so receipts can record which build produced them.