Lab

A free, professional-grade photo editor for the desktop.

Lab is one Cargo workspace of small crates with enforced boundaries, ordered from the most general to the most specific. Dependencies point only toward the more general, and that direction is held mechanically — by Cargo and by xtask checks — not by convention. The crates grow one at a time; each is earned, not pre-created.

The foundation is an error model: failures are values, carried by a contract trait that each crate implements and read as one legible chain. The decisions behind the architecture precede the code and are public, recorded as ADRs:

• adrs.rsb.sh — the decision log: the base coding standard, errors-are-values, the error contract, and the message grammar.
• rsb.sh — the wider engineering record: decisions, standards, and the architecture.
• app.rsb-lab.com — the product home.

Layout

• crates/ — the substrate: small, focused crates with enforced dependency direction, beginning with lab-core (the error contract at the workspace root).
• apps/lab — the application. Composition only.
• xtask — the checks that hold the architecture: dependency-cone assertions and module fences, arriving with the crates they guard.

License

GPL-3.0-or-later. See LICENSE.

Contributing

Contribution opens once the CLA is in place. Until then, the engineering record at rsb.sh is the best way to follow the work.