ci: publish homebrew formula for every stable release

[chalabi2]

Problem

The homebrew tap stopped receiving akash formula updates after v2.0.1 (2026-03-23). v2.1.0 was released on 2026-06-08 but never reached the tap.

Root cause

The notify-homebrew job gates the tap dispatch on script/mainnet-from-tag.sh, which implements the old even minor = mainnet convention. That convention is obsolete: mainnet upgrades have shipped with odd minors since v1.1.0 (see net/mainnet/upgrades/ — v1.1.0, v2.1.0). As a result the dispatch step was silently skipped for v2.1.0 (run) — and historically for all of v1.1.x as well (the tap has no v1.1.x entry).

The same dead convention affects two other release paths (fixed here as well):

• docker tags: IS_STABLE required IS_MAINNET, so v2.1.0's image was published as :latest instead of :stable (Makefile → make/releasing.mk → .goreleaser.yaml).
• release notes: genchangelog.sh restricted the changelog baseline to tags with the same minor parity, so v2.1.0's notes were generated against v1.1.1 instead of v2.0.1.

Release policy per PM: formulas publish for every stable tag, never for prereleases.

Changes

• release.yaml: gate the homebrew notify only on is_prerelease.sh (strict equality so script failures fail closed), matching the equivalent gate in the provider repo. Prereleases (rc/alpha/aN) still never publish.
• Delete dispatch.yaml: it fired on every push with an undefined RELEASE_TAG, flooding the tap with failing empty-tag dispatches (e.g. run). notify-homebrew in release.yaml is the real dispatch path.
• Makefile: derive IS_STABLE from the prerelease check alone, so every stable release publishes :stable docker images.
• genchangelog.sh: filter changelog tags only by stable vs prerelease, removing the even/odd parity matching.
• Remove script/mainnet-from-tag.sh: no consumers remain.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: b3b7bf73-538c-4f71-938a-5a49d162968d

📥 Commits

Reviewing files that changed from the base of the PR and between 9e64460 and 2a18256.

📒 Files selected for processing (2)

• script/genchangelog.sh
• script/mainnet-from-tag.sh

💤 Files with no reviewable changes (1)

• script/mainnet-from-tag.sh

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Walkthrough

Simplifies release CI by gating Homebrew notifications solely on prerelease output; changes Makefile stable-flag logic to depend on prerelease only; updates changelog script comments and tag-filter regexes; and fixes tag minor-parity exit behavior so odd minors return non-zero.

Changes

Release flow and tooling

Layer / File(s)	Summary
Homebrew notification condition simplification .github/workflows/release.yaml	The check step outputs only is_prerelease, and the "notify homebrew with a new release" step condition now depends solely on steps.check.outputs.is_prerelease == '1'.
IS_STABLE determination Makefile	IS_STABLE now defaults to false and is set to true when IS_PREREL is false; the IS_MAINNET variable and its prior gating were removed.
Changelog script docs and regexes script/genchangelog.sh	Header clarifies prerelease vs release note categories; version_rel and version_prerel regexes are defined unconditionally using sourced semver helpers, replacing prior conditional patterns.
Minor version parity fix script/mainnet-from-tag.sh	Fixes the minor-parity conditional to use `

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Poem

I hopped through YAML, Makefile, script, and tag,
Tweaked checks, smoothed regexes, fixed a parity snag.
Prerelease lights the pathway, stable flags stand true,
Odd minors now stumble — even hops bounce through.
Release sails on tidy tags, and I nibble a carrot too. 🐇

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: enabling Homebrew formula publication for all stable releases by removing obsolete version-parity logic.
Description check	✅ Passed	The description clearly explains the problem (Homebrew tap missing v2.1.0 due to obsolete mainnet convention), root cause, and all changes made across five files to fix it.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ci/fix-homebrew-notify

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In @.github/workflows/release.yaml:
- Line 97: The workflow gate currently uses
contains(steps.check.outputs.is_prerelease, '1') which performs substring
matching; replace it with a strict equality comparison so only the exact
sentinel triggers the job — change the if expression to use
steps.check.outputs.is_prerelease == '1' (i.e., replace contains(...) with a
strict == '1' check) in the if: conditional for the stable-tag gating.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: df2ca7b7-5b75-4686-886a-d9291d008fae

📥 Commits

Reviewing files that changed from the base of the PR and between 151b989 and 0d3dda4.

📒 Files selected for processing (3)

• .github/workflows/dispatch.yaml
• .github/workflows/release.yaml
• script/mainnet-from-tag.sh

💤 Files with no reviewable changes (1)

• .github/workflows/dispatch.yaml