Licensing

Artifact class	License	SPDX
Source code (Rust, firmware, tooling)	Apache-2.0	`Apache-2.0`
Documentation corpus (whitepaper, RFCs, ADRs, this website)	Creative Commons Attribution-ShareAlike 4.0 International	`CC-BY-SA-4.0`
Hardware designs (Arca schematics, gerbers, BOM)	CERN Open Hardware Licence v2, Strongly Reciprocal	`CERN-OHL-S-2.0`