Release credential bring-up

Everything needed to publish goq is already built and already fails closed. The only thing standing between this repository and a public release is that two committed trust pins still read unconfigured:

Pin	File	Becomes
Sigil publisher key	`release/sigil-minisign.pub`	The offline Minisign public key
Sigil bootstrap channel	`website/install-sigil`	`publisher_key` and `release_tag`

Both are free. There is no third credential, because Portal is deliberately not signed with an Apple Developer ID.

This document is the operator path from those sentinels to a published prerelease. It closes the credential half of issue #4 and issue #5.

Read Public release delivery for the trust model and the Portal runbook for the publication transaction.

Read this ordering constraint first

scripts/verify-sigil-bootstrap.py accepts exactly two states: fully closed, or fully open. A commit that configures release/sigil-minisign.pub while website/install-sigil still says unconfigured is rejected as "partially configured", and the website gate fails.

The bootstrap also pins one immutable release_tag. Combined with the promotion workflow reading release/sigil-minisign.pub from the checked-out tag, this means the release commit must already contain the real key and a bootstrap pinned to the tag it is itself becoming.

Pushing either path to main triggers a goq.sh deployment. So the release commit is tagged and released before it is merged, or the public install command goes live pointing at a release that does not exist yet. The sequence in "First release" below does this in the correct order. Do not shortcut it.

Part A: the Sigil offline publisher key

This key is the root of trust for every Bazzite install. It must be generated and must stay on a machine that is not the release runner and never a CI environment.

minisign -G -p sigil-minisign.pub -s sigil-release.key

Choose a strong passphrase and store it separately from the key file. Back up sigil-release.key offline, in two physically separate locations. There is no recovery path: losing it means every future release needs a new key and a reviewed re-pin, and disclosing it means an attacker can sign a package that the bootstrap will install without complaint.

Prove the passphrase works before you depend on it:

echo test > /tmp/sigcheck
minisign -Sm /tmp/sigcheck -s sigil-release.key
minisign -Vm /tmp/sigcheck -P "$(tail -1 sigil-minisign.pub)"

sigil-minisign.pub is two lines, an untrusted comment: line and the base64 key. Both matter, in different places:

release/sigil-minisign.pub takes the file verbatim. The verifier tolerates the comment line and reads the key from the last non-empty line.
website/install-sigil takes only the base64 key in readonly publisher_key="...", with no comment line.

The two must match exactly or the gate refuses to open the channel. The key decodes to exactly 42 bytes beginning Ed; anything else is rejected as malformed.

Record the key fingerprint and publish it through a channel independent of the website, so a compromised site cannot also redefine what "the real key" is.

Part B: no Apple credentials

Portal ships as an ad-hoc signed, un-notarized DMG. There is no Apple Developer Program membership, no Developer ID certificate, and no notarization credential, and none of them are required to cut a release.

The packaging gate refuses to build in ad-hoc mode if any of APPLE_SIGNING_IDENTITY, APPLE_CERTIFICATE, APPLE_API_KEY, APPLE_API_ISSUER, APPLE_API_KEY_PATH, APPLE_ID, or APPLE_PASSWORD is set. Do not add them to the main environment "just in case".

What replaces Apple as the trust anchor:

a GitHub/Sigstore build-provenance attestation bound to the exact workflow, tag ref, and source commit;
the published SHA-256 beside the DMG;
a release manifest that records signing: "adhoc" and notarized: false.

The cost is real and is stated on the website and in the release notes: macOS blocks Portal's first launch, and the user must allow it under System Settings, Privacy and Security.

If a membership is ever purchased, --signing developer-id still implements the full Developer ID path, and docs/public-release-delivery.md records what has to be restored. That branch is not exercised by CI; re-validate it end to end before trusting it.

Part C: the protected GitHub environment

Create an environment named main with required reviewers and restrict its deployment branches and tags to the release policy.

It needs no Apple secrets. The website deployment needs CLOUDFLARE_API_TOKEN and CLOUDFLARE_ACCOUNT_ID; scope the token to Workers deployment on the goq.sh account only.

No Minisign secret belongs here, or in any other GitHub environment. The promotion workflow has no input capable of receiving it, and that is deliberate.

First release, in order

The tag is v0.1.0, matching the version already in every workspace manifest.

Prepare one reviewed release commit on a branch. It replaces release/sigil-minisign.pub with the real public key file and opens website/install-sigil with the base64 publisher_key and readonly release_tag="v0.1.0". No version bump is needed.

Verify locally before pushing:
```
python3 scripts/verify-sigil-bootstrap.py \
  --bootstrap website/install-sigil \
  --public-key-file release/sigil-minisign.pub
./scripts/verify-website.sh
./scripts/tests/portal-release.sh
```
Expect sigil_bootstrap_channel=open.
Tag that exact commit and push the tag. Do not merge to main yet. Merging now would deploy an install command pointing at a release that does not exist.
Run Sigil Release with build-candidate against the tag. It creates the draft and attaches the unsigned candidate archive and its checksum.

Sign offline. Move the candidate bytes to the publisher machine, independently confirm the tag commit, then:

scripts/sign-bazzite-release.sh \
  --tag v0.1.0 \
  --archive /absolute/offline/path/sigil-v0.1.0-linux-glibc2.17-x86_64.tar.gz \
  --source-commit "$tag_commit" \
  --minisign-key /absolute/offline/path/sigil-release.key \
  --public-key-file /absolute/offline/path/sigil-minisign.pub

Carry only the resulting .minisig back and attach it to the draft. Never use --clobber.

Run Portal release against the same tag. It builds, verifies, and attests the ad-hoc macOS arm64 assets, and separately builds and attests the unpublished preview matrix. The draft stays a draft.
Run Sigil Release with promote-signed-draft. It requires the exact six-asset set, re-verifies both products against the same tag and commit, and publishes the prerelease.
Verify as a stranger would, on a different machine: download the DMG, check the digest, run gh attestation verify, confirm the Gatekeeper prompt behaves as documented, and run the public install command on clean Bazzite.
Merge the release commit to main. This deploys goq.sh with the install command open against the now-published tag.
Enable the Portal download with the follow-up reviewed change to website/portal-release.json described in the Portal runbook. It needs the published DMG's verified SHA-256, so it can only happen after step 6.

Every subsequent release repeats steps 1 to 9, except that the key is already correct and only release_tag in website/install-sigil moves.

Deliberately not automated

The Minisign secret key never enters CI. Signing is a manual offline step.
Opening or moving the public install channel is a reviewed website commit.
Enabling the Portal download link is a separate reviewed commit made only after an operator independently verifies the published artifact.
Preview matrix artifacts are never published. See Portal platform support.

If a step fails, the release stays a draft. Fix the source, discard the unpublished draft after review, and use a new version and tag; do not replace assets on a tag that anyone may already have fetched.