Nightly component releases

Status: accepted, 2026-11-01. Amends weekly CBC releases.

The nightly 04:00 gold replaces the weekly whole-OS cut. After installation and acceptance succeed, publish changed components independently in the one monorepo. GitHub hosts verified CBC bytes and never builds them. Release failure must not roll back accepted gold.

Every binary in the release contract and every shipping Mix component gets tags <name>-v<declared-version>-<YYYYMMDD>. Mix uses its language version; server and desktop bundles use the workspace version. Existing published tags are immutable. Server is the only line marked GitHub Latest, preserving full-system downloads for clients using the repository's default release.

Each component archive has one top directory containing its binary or Mix scripts and its runtime share files. Mix additionally has a bare binary. SHA256SUMS.txt and release.manifest.mx bind assets to full source commit, gold job, date and binary version lines. Compare remote digests after upload; remove the newly created release and fail loudly on mismatch.

Publish only when the component's directory, a transitive Cargo path dependency, lockfile or version changed. Parse Cargo statically, including workspace-inherited dependencies. Conservatively include shared packaging, layout and toolchain inputs. Bundles take the union of their members' inputs. Notes show the source range and path-limited commit log. First run publishes all lines. No periodic rebuild is needed to package an unchanged binary.

Use current Arch Linux glibc for now. Record the highest required GLIBC_ symbol version as information, with no floor gate. Cross-builds and older distribution compatibility are deferred until this release split works.

The release job uses a throwaway checkout at the gold commit and the already built snapshot, never a mutable development checkout. A gold predating the packager cannot be published through newer packaging code. Dry-run packaging and read-only planning precede the operator's first real publication.