Release Security Architecture

This page describes the security model for the NautilusTrader release pipeline. It explains how release artifacts are built, published, attested, and verified.

Use this page with:

Releases, which documents the release workflow and checklist.
Security Policy, which gives consumer-facing verification commands.
.github/OVERVIEW.md, which documents CI/CD controls.

Security goals

The release pipeline has four goals:

Build every official artifact from a reviewed repository commit.
Publish Python and Rust packages without long-lived package registry tokens.
Attach checksums, manifests, and provenance before publishing the GitHub release.
Give users enough public data to verify that downloaded artifacts match the release.

The GitHub release anchors package integrity. Stable releases attach wheel and sdist assets to a draft GitHub release before any package index publish starts. The pipeline publishes package indexes, verifies those indexes against the GitHub release assets, attaches final integrity assets, then publishes the GitHub release.

Threat model

The pipeline defends against:

Compromised or mutable third-party GitHub Actions, by pinning actions to commit SHAs.
Accidental release from the wrong workflow, branch, or environment, by binding OIDC publishers to nautechsystems/nautilus_trader, build.yml, and the release environment.
Long-lived package registry token theft, by using PyPI and crates.io Trusted Publishing.
Registry propagation lag or partial re-runs, by making publish and verify scripts idempotent and retry-tolerant.
Registry substitution or upload drift, by comparing PyPI and crates.io artifacts against release manifests and registry metadata.
Silent manual crate recovery, by requiring explicit CRATES_IO_MANUAL_PUBLISH_EXCEPTIONS entries and recording those exceptions in crates-manifest.json.

The pipeline does not defend against:

A malicious maintainer with permission to change release workflows and approve releases.
A compromise of GitHub, PyPI, crates.io, or Sigstore that can forge the trust roots users rely on.
A compromised end-user machine before verification runs.
Runtime compromise of an exchange, broker, data provider, or user trading strategy.
Bit-identical rebuild drift for wheels and sdists. The current guarantee is provenance and digest verification, not reproducible builds.

Trust roots

GitHub repository rules protect reviewed source, release branches, and release tags. Protected master and immutable v* release tags are the relevant records.
GitHub Actions OIDC issuer provides short-lived workflow identities from https://token.actions.githubusercontent.com.
GitHub release environment gates package publishing and release approvals. The environment restricts deployment to master and requires reviewer approval.
PyPI Trusted Publishing publishes wheels and sdist without a persistent token. It binds to repository nautechsystems/nautilus_trader, workflow build.yml, and environment release.
crates.io Trusted Publishing publishes Rust crates without a persistent token. It binds to owner nautechsystems, repository nautilus_trader, workflow build.yml, and environment release.
Sigstore Fulcio, Rekor, and TUF bind artifacts to OIDC identities and the transparency log. GitHub artifact attestations, PyPI publish attestations, and Docker cosign signatures rely on this root.
GitHub release immutability prevents post-publish asset and tag replacement. Published release assets and the release tag become immutable.

Release flow

The Docker workflow is separate from the package release workflow, but it follows the same identity model: image signatures and SBOM attestations bind the image digest to the expected GitHub Actions workflow identity.

Artifact records

Python wheels are published to GitHub Releases, PyPI, and the Nautech Systems package index (packages.nautechsystems.io). SHA256SUMS, per-asset .sha256 files, and dist-manifest.json record integrity. GitHub artifact attestations, PyPI publish attestations, .sigstore bundles, and .intoto.jsonl envelopes record provenance.
Python sdists use the same public locations, integrity records, and provenance records as wheels.
Rust crates are published to crates.io. The crates.io checksum and crates-manifest.json record integrity. crates.io trustpub_data records provenance unless an explicit manual exception is present.
Docker images are published to GitHub Container Registry. The image digest is the integrity record. Sigstore cosign signatures and SPDX SBOM attestations record provenance.
The GitHub release record is published through GitHub Releases. Published release assets and the immutable tag record integrity. The GitHub release attestation records provenance.

Consumer verification map

Detailed commands live in Verifying releases. The checks below show the public data each consumer should verify.

Python wheels and sdist

Verify:

The artifact digest matches SHA256SUMS, the per-asset .sha256 file, or dist-manifest.json.
The GitHub artifact attestation identity matches nautechsystems/nautilus_trader/.github/workflows/build.yml on master or nightly.
The PyPI publish attestation reports repository nautechsystems/nautilus_trader, workflow build.yml, and environment release.

Fish-compatible example:

set -gx TAG v1.228.0
set -gx REPO nautechsystems/nautilus_trader
set -gx ARTIFACT nautilus_trader-1.228.0.tar.gz
set -gx ISSUER https://token.actions.githubusercontent.com
set -gx IDENTITY \
  '^https://github\.com/nautechsystems/nautilus_trader/\.github/workflows/build\.yml@refs/heads/(master|nightly)$'

gh release download $TAG --repo $REPO --pattern $ARTIFACT --pattern $ARTIFACT.sha256
sha256sum -c $ARTIFACT.sha256
gh attestation verify $ARTIFACT \
  --repo $REPO \
  --cert-identity-regex $IDENTITY \
  --cert-oidc-issuer $ISSUER

PyPI publish provenance

Verify:

PyPI file hashes match dist-manifest.json.
PyPI provenance exposes the expected GitHub publisher identity.
pypi-attestations verify accepts the downloaded file URL.

Fish-compatible example:

set -gx VERSION 1.228.0
set -gx ARTIFACT nautilus_trader-1.228.0.tar.gz
set -gx PYPI_URL (curl -sS https://pypi.org/pypi/nautilus_trader/$VERSION/json | \
  jq -r --arg artifact "$ARTIFACT" '.urls[] | select(.filename == $artifact) | .url')

uv run --no-project --no-build --with pypi-attestations -- \
  pypi-attestations verify pypi \
  --repository https://github.com/nautechsystems/nautilus_trader \
  $PYPI_URL

Rust crates

Verify:

The crates.io version checksum matches the downloaded .crate file.
trustpub_data.provider is github.
trustpub_data.repository is nautechsystems/nautilus_trader.
published_by is null, unless crates-manifest.json records an explicit manual_token_publish exception.

Fish-compatible example:

set -gx CRATE nautilus-core
set -gx VERSION 0.58.0
set -gx REPO nautechsystems/nautilus_trader
set -gx VERSION_JSON (curl -sS https://crates.io/api/v1/crates/$CRATE/versions | \
  jq -c --arg version "$VERSION" '.versions[] | select(.num == $version)')
set -gx CRATE_SHA256 (printf '%s\n' "$VERSION_JSON" | jq -r '.checksum')

printf '%s\n' "$VERSION_JSON" | jq -e --arg repo "$REPO" \
  '.trustpub_data.provider == "github" and .trustpub_data.repository == $repo and .published_by == null'
curl -sSL https://static.crates.io/crates/$CRATE/$CRATE-$VERSION.crate -o $CRATE-$VERSION.crate
test (sha256sum $CRATE-$VERSION.crate | cut -d ' ' -f 1) = $CRATE_SHA256

Docker images

Verify:

The mutable tag resolves to the digest you intend to run.
The cosign signature identity matches the Docker workflow.
The SPDX SBOM attestation is bound to the same image digest.

Fish-compatible example:

set -gx IMAGE_BASE ghcr.io/nautechsystems/nautilus_trader
set -gx DIGEST (crane digest $IMAGE_BASE:latest)
set -gx IMAGE $IMAGE_BASE@$DIGEST
set -gx ISSUER https://token.actions.githubusercontent.com
set -gx IDENTITY \
  '^https://github\.com/nautechsystems/nautilus_trader/\.github/workflows/docker\.yml@refs/heads/(master|nightly)$'

cosign verify $IMAGE --certificate-identity-regexp $IDENTITY --certificate-oidc-issuer $ISSUER
cosign verify-attestation \
  --type https://spdx.dev/Document/v2.3 \
  $IMAGE \
  --certificate-identity-regexp $IDENTITY \
  --certificate-oidc-issuer $ISSUER

Manual recovery posture

Normal releases use Trusted Publishing only. Manual package publishing is a last-resort recovery path after a partial release.

Rules for manual recovery:

Prefer re-running the failed job or workflow when a registry or Sigstore verifier fails.
Do not replace a release tag or GitHub release assets after publication.
Do not silently accept manually published crates.
If a crate must be recovered with a token, list each crate@version in CRATES_IO_MANUAL_PUBLISH_EXCEPTIONS.
Record the exception in release notes and in crates-manifest.json with release_status: "manual_token_publish".

No routine release path depends on a long-lived PyPI or crates.io token.

Incident response posture

PyPI publisher drift is detected by the PyPI provenance verifier. Stop publishing, fix the PyPI Trusted Publisher, and rerun verification.
crates.io publisher drift is detected by the trusted-publishing check or registry verifier. Fix crate publisher settings and rerun. Use a manual exception only for partial recovery.
GitHub release asset mismatch is detected by checksum or manifest verification. Stop the release before publication, or publish an advisory if assets already shipped.
Sigstore, Rekor, or TUF lag is detected by retryable transparency errors. Retry with bounded backoff, then pause release sealing if lag persists.
Sigstore trust root concern appears when attestation verification becomes ambiguous. Pause releases, verify against registry records, and rotate trust roots when supported.
Workflow identity mismatch is detected by GitHub, PyPI, or cosign identity checks. Treat it as configuration drift or compromise until reviewed.
Manual crate publish exceptions are detected when crates.io shows published_by instead of trustpub_data. Record the explicit exception, document affected crates, and preserve the audit trail.

SLSA posture

Python release artifacts carry build provenance through GitHub artifact attestations and PyPI publish attestations. Docker images carry Sigstore signatures and SPDX SBOM attestations. Rust crates rely on crates.io Trusted Publishing metadata and the release crates-manifest.json.

This page does not assert a named SLSA level for all artifact classes. Any future SLSA level claim must cite this architecture, name the artifact classes it covers, and include CI validation that the published provenance parses as the claimed predicate type.

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