Release Process

Lightweight by design. Jacquard is a single-binary Rust project with vendor/ submodules; releases are git tags + a CHANGELOG entry. No crates.io publication, no pre-built binaries (until/unless that demand surfaces).

When to release

Cut a release when:

  • A user-visible feature or fix lands that you want consumers to be able to pin against.
  • Schema or CLI changes happened (--timing-report JSON, CLI flags) and consumers need a stable reference point.
  • A meaningful chunk of work in docs/plans/ is closed (e.g. a Phase exits all criteria).

There is no fixed cadence.

Versioning

SemVer, starting once the first numbered release ships. Pre-1.0 versions (0.x.0) carry the standard SemVer caveat: minor bumps may include breaking changes; the public contracts (--timing-report schema, IR layout) are documented in their own ADRs and follow stricter rules.

Stable contracts (additive-only, breaking changes require a major bump and a deprecation window):

  • --timing-report JSON schema — src/timing_report.rs::SCHEMA_VERSION, governed by ADR 0008.
  • Timing IR FlatBuffers schema — crates/timing-ir/schemas/timing_ir.fbs, governed by ADR 0002.

CLI flags, log message formats, and --timing-summary text output are not stable parseable contracts; consumers that need to script against them should use --timing-report JSON.

Steps

For maintainers cutting a release:

  1. Verify CI is green on main for all three GPU backends (Metal, CUDA, HIP) plus the unit-test, opensta-to-ir, and lint jobs. If any GPU runner is offline, hold the release until it's restored — see .github/workflows/ci.yml. Do not ship a binary the CI hasn't built.

  2. Roll the [Unreleased] section in CHANGELOG.md into a numbered version block. Format follows Keep a Changelog. Update the link references at the bottom of the file. Leave a fresh empty [Unreleased] section at the top.

  3. Bump the Rust crate version to match: python3 scripts/bump_version.py <X.Y.Z>. The three first-party Rust crates (jacquard, opensta-to-ir, timing-ir) ship together in one tarball and carry a single shared version, so this script sets all three at once — never edit their [package].version by hand. Then cargo build to update Cargo.lock. (netlist-graph versions independently — see its own netlist-graph-v* tag flow.) The release workflow re-runs bump_version.py --check <tag> as a verify-guard and aborts before publishing if the tag and the crates disagree.

  4. Commit: chore: release v<X.Y.Z> with the standard Co-developed-by trailer.

  5. Tag: git tag -a v<X.Y.Z> -m "v<X.Y.Z>" then git push --tags.

  6. Create a GitHub release from the tag. Body = the CHANGELOG section for that version. No artefacts attached unless someone has asked for them.

Homebrew tap (automated)

The Homebrew formula is auto-bumped by release.yml — no manual step (this closes the drift that had left the tap stale at 0.2.3). On every release tag the bump-tap job rewrites packaging/homebrew/jacquard.rb's url/version/sha256 from the just-published tarball + .sha256 and pushes Formula/jacquard.rb to the tap:

  • final release → gpu-eda/homebrew-tap (brew install gpu-eda/tap/jacquard);
  • prerelease (RC) → gpu-eda/homebrew-tap-prerelease (brew install gpu-eda/tap-prerelease/jacquard), so RCs are brew install-able for staging without touching the stable channel.

packaging/homebrew/jacquard.rb is the template — edit it only to change the formula's structure (deps, install, test); its version pin is a placeholder the job overwrites. Requires the one-time org setup: secrets.HOMEBREW_TAP_TOKEN (a token with contents: write on both tap repos) and the gpu-eda/homebrew-tap-prerelease repo.

Staging validation (release candidates)

Optional but recommended before a user-facing release: prove the documented install commands work against a staging artifact before promoting. There is no "test crates registry", so a GitHub prerelease is the staging tier for the binary channels.

Sequence matters — do NOT roll main to the final version before the RC validates. During the RC window main is the candidate: it stays at X.Y.Z-rc.N with the changelog still under [Unreleased]. Only the Promote step (below) rolls [Unreleased] → [X.Y.Z] and bumps to the final X.Y.Z. Rolling the release onto main first leaves main advertising a version that has no release — the version pin and dated changelog claim X.Y.Z is shipped while only the RC tag exists, which also breaks cargo binstall --git (it reads main's version and fetches a non-existent vX.Y.Z tarball). Each new RC is a main commit bumped to the next -rc.N; main == the latest RC tag throughout.

  1. Cut an RC. On main at X.Y.Z-rc.N (changelog under [Unreleased]), python3 scripts/bump_version.py <X.Y.Z>-rc.<N>, commit, tag v<X.Y.Z>-rc.<N>, push the tag. release.yml detects the SemVer pre-release suffix and publishes a GitHub prerelease (never shown as "Latest") with the Metal tarball attached, and bump-tap pushes the formula to gpu-eda/homebrew-tap-prerelease.

  2. Validate. Dispatch the Validate install (staging) workflow (validate-install.yml) with that tag. It runs the real install commands against the prerelease asset on macOS:

    • cargo binstall (asset-fetch via the [package.metadata.binstall] override, compile fallback disabled so a missing asset fails hard);
    • brew install of an RC formula (the source-of-truth formula repointed at the prerelease tarball + its .sha256, installed from a throwaway local tap).

  3. Promote. A green run means the channels work. Bump to the final <X.Y.Z> (drop the -rc.<N>), commit, tag v<X.Y.Z>, push — the same flow as a normal release below.

The netlist-graph (PyPI) channel validates separately via its own workflow_dispatch → TestPyPI path (see publish-netlist-graph.yml); it versions independently of the Rust crates.

What does NOT need to change at release time

  • Submodule pins (unless deliberately bumping a vendored dep).
  • The vendor/opensta/ submodule pin is the version named in crates/opensta-to-ir::MIN_TESTED_OPENSTA_VERSION. If you bump the submodule, also bump the constant and the version-probe test — see WS-RH.1 in docs/plans/post-phase-0-roadmap.md.
  • LICENSE (unless re-licensing).

Pre-release checklist (one-time, before the first numbered release)

These items are tracked in docs/plans/post-phase-0-roadmap.md § Release hardening; this section is the visible punch-list:

  • Phase 1 (ADR 0008 required outputs) closed.
  • WS-RH.1 (OpenSTA detection + version check) shipped.
  • Metal CI on macos-runner-1 green (re-enabled in commit 12e98df, 2026-05-12).
  • CUDA CI on nvidia-runner-1 green on main. Currently disabled in .github/workflows/ci.yml (if: ${{ false }}, ~line 268). Re-enable when hardware lands.
  • HIP CI on the AMD runner green on main. Currently disabled in .github/workflows/ci.yml (if: ${{ false }}, ~line 357). Re-enable when the AMD runner is online.
  • Prebuilt CUDA/HIP binaries (ADR 0018 Phase 4), when produced, must build with JACQUARD_CUDA_ARCH=all-major so the kernel ships portable SASS for every major arch (sm_50…sm_120 on CUDA ≥ 12.8, Blackwell included) plus PTX for the newest — see the README § CUDA target architecture. Local dev uses JACQUARD_CUDA_ARCH=native instead. The nvidia1.local Blackwell box (sm_120, CUDA 12.8) is a candidate self-hosted CUDA release runner.
  • Vendored-dep license posture confirmed (gzz2000/eda-infra-rs#2 — sverilogparse AGPL declaration acknowledged as a typo; workspace Apache-2.0 governs).
  • Cargo.toml::license = "Apache-2.0" set.
  • NOTICE file enumerating vendored deps + their licenses.
  • Bump vendor/eda-infra-rs submodule once upstream pushes the sverilogparse Cargo.toml correction; remove the corresponding footnote in NOTICE. Maintainer acknowledged the typo on 2026-05-02 but hasn't pushed the fix as of 2026-05-13. Verify with git -C vendor/eda-infra-rs fetch && git log origin/master --oneline.
  • CUDA / HIP runtime violation routing through process_events — done (commit 24723b5, issue #104). sim_cuda / sim_hip now dispatch the timed-batched path and drain violation events, so --timing-report / --timing-summary / --timed are no longer Metal-only.
  • Bounded violations array (--timing-report-max-violations, default 100k).
  • End-to-end --timing-report test on Metal CI. The inv_chain_pnr sim step uses --timing-ir (pre-generated .jtir checked in) + --timing-report + --timing-summary; a follow-up step validates the JSON shape (top-level keys, semver schema version, metadata, stats, arrays).
  • GF180MCU enablement (Phases 0–6) shipped. See docs/plans/gf180mcu-enablement.md. Phase 7 (wafer.space test-run-1 design integration) deferred pending design availability; not release-blocking.

License posture

Project license is Apache-2.0 (LICENSE). Vendored-dep posture is enumerated in NOTICE. Summary:

  • vendor/eda-infra-rs/ — Apache-2.0 (workspace). The sverilogparse sub-crate's stale AGPL-3.0-only declaration in Cargo.toml is a typo per upstream maintainer (gzz2000/eda-infra-rs#2); governed by the workspace LICENSE. Submodule pin will be bumped when upstream pushes the correction.
  • vendor/sky130_fd_sc_hd/ — Apache-2.0.
  • vendor/opensta/ — GPL-3 (subprocess only per ADR 0001 + ADR 0006 § Amendment; never linked, never bundled).

Cross-references