chore(ci): use github runners for fork prs by jdx · Pull Request #12345 · jdx/mise

jdx · 2026-08-23T18:33:51Z

Summary

route fork pull requests to GitHub-hosted Linux and macOS runners while keeping same-repository pull requests on Namespace
install pinned mr-boxington v0.2.0 from mise.toml and its checksum-locked release metadata for Rust build and test jobs
warm a bounded mbx local CAS from trusted main builds and store it in GitHub Actions cache
let fork pull requests restore the main cache without permission to save it or access the private mise cache host
retain sccache for Clippy because released mbx currently bypasses Clippy compilations

Cache safety

cache keys include mbx v0.2.0 and the trusted main SHA
fork workflows use actions/cache/restore only
the main warmer caps the mbx store at 3 GB per platform before saving
no mbx remote URL or private cache credential is exposed

Testing

mise run lint-fix
mise run render
actionlint on the changed workflows
action-validator on the setup-mbx composite action
zizmor on the cache-warming workflow
mise install github:jdx/mr-boxington verification against the published v0.2.0 Linux asset, GitHub attestation, and SLSA provenance
local mbx smoke tests for dependency hits and sccache/Clippy compatibility boundaries
git diff --check

AI-assisted — Tool: Codex; model: unavailable/unavailable; version: unavailable.

Note

Medium Risk
Touches CI runner selection, cache restore vs save, and release job gates for forks. Mis-routing or cache poisoning would affect untrusted PRs and build performance, not product auth.

Overview
Fork pull requests now run on GitHub-hosted Linux/macOS runners instead of Namespace. Same-repo PRs stay on Namespace. Release jobs only run for trusted release PRs, not forks.

Rust build/test jobs install pinned mbx 0.2.0 via a new setup-mbx action and mbx build instead of cargo + sccache (Clippy still uses sccache). A main-branch warmer writes a 3GB-capped GHA cache; forks restore it read-only and never get Namespace cache.

Perf jobs skip .github / mise.toml / mise.lock changes, and perf tasks ignore the repo mise.toml so tool pins do not skew benchmarks.

^{Reviewed by Cursor Bugbot for commit fe2c952. Bugbot is set up for automated code reviews on this repo. Configure here.}

Summary by CodeRabbit

Improvements
- Fork-based pull requests now run reliably on standard hosted runners, improving compatibility and security.
- Build, test, lint, documentation, and release workflows use safer cache handling for external contributions.
- Added automated Rust build-cache warming for scheduled, main-branch, and manually triggered runs.
- Improved cross-platform build and test caching with clearer cache diagnostics.
- Standardized project build tooling across supported Linux and macOS environments.
- Performance checks now avoid running for configuration-only changes.

coderabbitai · 2026-08-23T18:34:17Z

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⚙️ Run configuration

Configuration used: Repository YAML (base), Central YAML (inherited), Organization UI (inherited)

Review profile: CHILL

Plan: Pro Plus

Run ID: d9b2f690-5598-4611-a36b-043f95181118

📥 Commits

Reviewing files that changed from the base of the PR and between f6bd772 and 5ff571a.

⛔ Files ignored due to path filters (1)

mise.lock is excluded by !**/*.lock

📒 Files selected for processing (1)

.github/workflows/perf-pr.yml

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📝 Walkthrough

Walkthrough

GitHub Actions now use hosted runners for fork pull requests and Namespace runners for trusted events. Workflows use mbx v0.2.0 for Rust builds, tests, cache restoration, statistics, and cleanup. Release operations now require trusted release pull requests.

Changes

Fork-safe CI execution

Layer / File(s)	Summary
mbx setup and cache restoration `.github/actions/setup-mbx/action.yml`, `mise.toml`	The action installs mbx v0.2.0 through mise, verifies the version, exports the cache directory, and uses v0.2.0 cache keys.
Fork-aware workflow routing `.github/workflows/docs.yml`, `.github/workflows/registry.yml`, `.github/workflows/test.yml`, `.github/workflows/test-vfox.yml`, `.github/workflows/vendored-file-warning.yml`	Fork pull requests use hosted runners. Trusted events continue to use Namespace runners.
mbx workflow execution `.github/workflows/registry.yml`, `.github/workflows/test-vfox.yml`, `.github/workflows/test.yml`	Build, test, and cache-stat commands use mbx. Namespace caching is restricted to trusted runs, with fork-safe cache restoration.
Hosted runner cache warming `.github/workflows/github-runner-cache.yml`	Scheduled, push, and manual Ubuntu and macOS jobs restore caches, build with all features, and run bounded `mbx gc` cleanup.
Trusted release conditions `.github/workflows/release.yml`	Release packaging, verification, signing, artifact, and release-script steps exclude fork and non-release pull requests.
Performance workflow filtering `.github/workflows/perf-pr.yml`	The performance workflow ignores pull requests that change only GitHub Actions or mise configuration files.

Estimated code review effort: 3 (Moderate) | ~30 minutes

Merge Risk: ⚪ Minimal · up to 5ff57

The PR changes CI runner selection, cache handling, and fork-related release guards, but no actionable merge-blocking risk remains after normal checks and review.

Poem

A rabbit checks each runner gate,
Forked jobs take the hosted route.
mbx builds and caches hop,
Mise keeps the tool on top.
Release steps wait for trusted paths.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (1 skipped: 1 unsupported.)
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.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the primary change: routing fork pull requests to GitHub-hosted runners.

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greptile-apps · 2026-08-23T18:37:59Z

Greptile Summary

The PR routes fork pull requests to GitHub-hosted runners while retaining Namespace runners for trusted workflows, and introduces a pinned mbx-backed cache for Rust CI.

Fork release builds are now excluded by repository-identity checks.
The aggregate release job uses the same trusted-release predicate as its artifact dependencies.
Same-repository release PRs and non-PR releases retain the large Linux and ARM macOS Namespace runners.
Fork workflows restore the main-branch cache without permission to save it.

Confidence Score: 5/5

The PR appears safe to merge because the previously reported release-runner and false-success paths are no longer reachable.

No blocking failure remains.

Important Files Changed

Filename	Overview
.github/workflows/release.yml	Adds consistent same-repository release gating to artifact and aggregate jobs while preserving the required large Linux and ARM macOS runners for reachable release builds.
.github/actions/setup-mbx/action.yml	Installs the pinned mbx tool and optionally restores the main-branch GitHub Actions cache.
.github/workflows/github-runner-cache.yml	Adds a trusted-main workflow that warms and bounds platform-specific mbx caches.
.github/workflows/test.yml	Routes fork jobs to hosted runners and replaces most Rust build and test caching with mbx.
.github/workflows/registry.yml	Applies fork-aware runner selection and mbx caching to registry build jobs.
.github/workflows/test-vfox.yml	Applies fork-aware runner selection and uses mbx for vfox builds and tests.
mise.toml	Pins mr-boxington and isolates performance fixtures from repository tool configuration.
mise.lock	Locks mr-boxington v0.2.0 release assets and checksums across supported platforms.

_{Reviews (17): Last reviewed commit: "perf: isolate benchmark fixture from dev..." | Re-trigger Greptile}

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Actionable comments posted: 2

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Inline comments:
In @.github/workflows/github-runner-cache.yml:
- Around line 3-8: Restrict manual cache warming to the main branch in the
workflow: either remove workflow_dispatch or add a condition to the warm job
requiring refs/heads/main. Preserve the existing push and scheduled triggers.

In @.github/workflows/release.yml:
- Line 97: Update the release workflow’s secret-dependent conditions, including
the macOS runner selection and release preparation/signing gates, to require a
trusted source repository rather than relying on the pull request branch name;
preserve tag-gating for CDN and GitHub publishing, and if fork release pull
requests remain buildable, route them through an explicit unsigned path excluded
from release success checks.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Repository YAML (base), Central YAML (inherited), Organization UI (inherited)

Review profile: CHILL

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Run ID: 202279e3-959b-45fb-bf25-4ed35955a4e9

📥 Commits

Reviewing files that changed from the base of the PR and between 2a02059 and e00539e.

📒 Files selected for processing (8)

.github/actions/restore-fork-cache/action.yml
.github/workflows/docs.yml
.github/workflows/github-runner-cache.yml
.github/workflows/registry.yml
.github/workflows/release.yml
.github/workflows/test-vfox.yml
.github/workflows/test.yml
.github/workflows/vendored-file-warning.yml

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github-actions · 2026-08-23T19:43:05Z

Instruction counts

benchmark	trend	instructions	Δ	wall (min)	Δ
env	`████▇▇▇▇▇▇▁`	70,184,682 → 34,618,334	-50.68%	18.33 → 12.25ms	-33.15%
hook-env	`████▇▇▇▇▇▇▁`	71,690,694 → 35,764,892	-50.11%	19.45 → 13.08ms	-32.73%
ls	`████▇▇▇▇▇▇▁`	65,314,506 → 38,022,936	-41.78%	17.50 → 14.36ms	-17.93%
registry	`████▂▂▂▂▂▂▁`	37,447,525 → 36,905,953	-1.45%	11.30 → 11.13ms	-1.44%
startup	`████▁▁▁▁▁▁▁`	9,531,724 → 9,216,048	-3.31%	7.33 → 7.74ms	+5.67%

No instruction-count regression above 1%.

_{Only instruction counts gate. Wall clock is shown for context — on identical hardware it moves 4-20% run to run.}

_{Measured by tak — instruction-counted CLI benchmarks, stored in this repository's git notes.}

_{7e6ff867321a vs 2a02059445d2 · measured on the runner, not pushed to the history.}

cursor

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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^{Reviewed by Cursor Bugbot for commit 49bd4ca. Configure here.}

@jdx

### 🚀 Features - **(bootstrap)** add package plugin uninstall support by @jdx in [#12332](#12332) ### 🐛 Bug Fixes - **(brew-cask)** recognize Homebrew-owned casks by @donbeave in [#12346](#12346) - **(cli)** report a cd target it cannot enter instead of panicking by @JamBalaya56562 in [#12314](#12314) - **(config)** skip disabled idiomatic tracked configs by @xqm32 in [#12194](#12194) - **(config)** keep comments when saving from mise edit by @Marukome0743 in [#12319](#12319) - **(config)** strip a byte-order mark before reading a version file by @JamBalaya56562 in [#12325](#12325) - **(doctor)** report installs that provide no executables by @Marukome0743 in [#12321](#12321) - **(env)** say why an age SSH identity could not be used by @Marukome0743 in [#12339](#12339) - **(env)** name the key and file behind an unexpanded $VAR by @Marukome0743 in [#12316](#12316) - **(go)** don't hand go install a GOROOT from another Go by @Marukome0743 in [#12342](#12342) - **(task)** treat a SIGINT-killed child as an interruption by @Marukome0743 in [#12323](#12323) - **(task)** preserve string type for usage value flags by @jdx in [#12355](#12355) - **(tasks)** tell Windows users why a task file was skipped by @JamBalaya56562 in [#12324](#12324) - **(tool-stub)** keep env_with_path instead of rebuilding PATH by @tmkx in [#12322](#12322) - **(watch)** restore the controlling terminal from a drop guard by @Marukome0743 in [#12328](#12328) ### 🚜 Refactor - **(cli)** keep one copy of the task-flag escape rule by @JamBalaya56562 in [#12343](#12343) ### 📚 Documentation - **(tasks)** point extensionless pwsh tasks at MISE_TASK_DIR by @JamBalaya56562 in [#12313](#12313) ### 📦️ Dependency Updates - update rust crate aube-registry to v2.1.0 by @renovate[bot] in [#12348](#12348) - bump aube to 2.1.0 by @jdx in [#12351](#12351) - bump usage to 6.2.0 by @jdx in [#12354](#12354) ### 📦 Registry - fix usage version test by @jdx in [#12349](#12349) - install oc from a channel directory by @Marukome0743 in [#12326](#12326) ### Chore - **(ci)** use github runners for fork prs by @jdx in [#12345](#12345) - **(ci)** prevent cache warmer starvation by @jdx in [#12350](#12350) ### New Contributors - @tmkx made their first contribution in [#12322](#12322)

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jdx force-pushed the chore/fork-pr-github-runners branch from e00539e to 719bcae Compare August 23, 2026 18:45

chore(ci): use github runners for fork prs

96700b7

jdx force-pushed the chore/fork-pr-github-runners branch from 719bcae to 96700b7 Compare August 23, 2026 18:47

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jdx added 5 commits August 23, 2026 20:15

chore(ci): install mbx 0.2.0 with mise

4534322

chore(ci): bootstrap mise before installing mbx

fc4e722

chore(ci): restrict trusted cache and release paths

f6bd772

chore(ci): keep mbx lock platforms consistent

d1c12f9

chore(ci): skip perf gate for tooling-only changes

5ff571a

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jdx added 2 commits August 24, 2026 00:49

chore(ci): skip aggregate release for untrusted prs

9a7aa60

perf: isolate benchmark fixture from dev tools

fe2c952

jdx force-pushed the chore/fork-pr-github-runners branch from 7e6ff86 to fe2c952 Compare August 24, 2026 00:49

jdx merged commit 617929e into main Aug 24, 2026
34 of 37 checks passed

jdx deleted the chore/fork-pr-github-runners branch August 24, 2026 01:55

mise-en-dev mentioned this pull request Aug 24, 2026

chore: release 2026.8.12 #12344

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Marukome0743 mentioned this pull request Aug 24, 2026

test: make e2e harness compatible with BSD env #12357

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This was referenced Aug 25, 2026

chore(ci): adopt mbx for Rust builds jdx/fnox#749

Merged

chore(ci): adopt mbx for Rust builds jdx/hk#1229

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chore(ci): adopt mbx for Rust builds #12405

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coderabbitai Bot mentioned this pull request Aug 26, 2026

security: bound remote downloads and protect release assets jdx/mr-boxington#109

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chore(ci): use github runners for fork prs - #12345

chore(ci): use github runners for fork prs#12345
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Summary

Cache safety

Testing

Summary by CodeRabbit

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Confidence Score: 5/5

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