Publish a permanent demo render for every stable release under /v/ - #464
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The published demo only ever answers "what does the report look like right now", because deploy-pages replaces the whole site each time. That is a real gap while 4.0 deliberately breaks the visual contract and users run released versions rather than main. Publish stable release renders under /v/<tag>/ alongside main at the root. Per-commit versioning was costed and rejected: the live site is 11.1 MB and main takes ~190 commits a year, which is ~2.1 GB/year against a 1 GB Pages limit — over the ceiling within six months. Per-release is ~44 MB/year. The design's load-bearing choice is that the version store holds only the immutable release renders, never main's. That keeps the path which runs 190 times a year read-only, and confines contents: write to the release path that runs a few times a year. Records a prerequisite that blocks the release path outright: the github-pages environment admits deployments from the branch main alone, so a tag-triggered run is rejected by the protection rule. A tag policy entry has to be added first, and the obvious workaround does not exist because GITHUB_TOKEN-triggered runs do not chain. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Task 1 is the assembler and is where the design's safety lives: deploy-pages replaces the whole site, so a run that assembles a truncated tree deletes published versions and still finishes green. Four guards make that loud, and each is verified by deliberately triggering it rather than by reading the code. Written in Python rather than shell on purpose. The shell CI job runs shellcheck over every *.sh and is a required check, macOS runners ship bash 3.2 with no mapfile, and scripts/select_simulator.py already sets the precedent. Self-review caught a deadlock: pages-release.yml calls pages.yml as a reusable workflow, and a called workflow evaluates its own concurrency, so sharing the `pages` group would have made the call wait on a group its own caller was holding. The release workflow uses `pages-store` instead. Also records that pages.yml runs only on push to main and workflow_dispatch, so this change cannot be proven from a pull request — the plan says so plainly rather than implying a PR run verifies it. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
deploy-pages replaces the whole site on every deployment, so a run that assembles an incomplete tree deletes published versions and still finishes green. The four guards here turn each way that can happen into a failure: a declared version with no render, a rendered version nobody declared, a missing store or missing main render, and a site over the 800 MB ceiling. Also deletes _site/.git, which actions/checkout leaves behind and upload-pages-artifact would otherwise publish as browsable history. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
A called workflow inherits the CALLER's event context. pages.yml's source checkout specifies no ref, so when pages-release.yml calls it the checkout resolves github.ref to the tag rather than main. The site root would then be rebuilt from the tag's source, rolling `/` back whenever a tag is cut from behind an advanced main — until the next merge happened to republish it. Give the workflow_call trigger a render-ref input and pass `main` from the release workflow. The `|| github.sha` fallback avoids relying on actions/checkout treating an empty ref as "use the default", so the push-to-main path is provably unchanged rather than argued to be. The store checkout is untouched: it already pins ref: pages-site explicitly.
The assembler exists to disbelieve the store, and three defects in versions.json still got past it: entries that are not version numbers (path traversal, spaces, `#` breaking the generated href), the same version listed twice, and — where the store's `v` is a file rather than a directory — a raw FileExistsError traceback where every other failure emits ::error::. Sort the listing by version too. publish-version prepends, so a maintenance release on an older line is the newest manifest entry and rendered at the top, where a reader takes it for the latest version. versions.json stays in publication order: the manifest records what happened, the page presents it. The format guard above is what makes that integer sort total.
deploy-pages replaces the whole site on every deployment, so a regression in assemble_site.py publishes a tree with released versions missing in a run that still reports success. Until now its guards had only ever been exercised by hand, in shell transcripts that are gone. Standard library only — unittest and tempfile — so nothing new is installed anywhere. The tests drive the real script as a subprocess and assert on exit status, the ::error:: annotations and the files left on disk rather than on mocks. `v/.gitkeep` gets its own case and ships in every fixture: the real store contains it, and reading it as an undeclared version would fail every merge to main until the first release. The step rides in lint.yml's existing shell job because the runner already has python3; no new job, no new runner.
`git add "v/$TAG/index.html"` is correct only while `-i` emits exactly one file. If the render ever gains a sibling asset the store takes a version whose index.html exists and whose page is broken — which the truncation guard, which checks only index.html, would pass. Staging the directory costs nothing and removes the coupling. The two comments are for whoever is debugging a release at the time: on a tag push GitHub runs the workflow files as they existed at the tag while the sources and the assembler come from main, and a queued deploy can still be cancelled by a later merge because GitHub keeps only one pending run per concurrency group.
The plan's purpose is re-execution, and its Task 3 and Task 4 YAML still showed the pre-fix workflow_call block and a deploy job with no `with: render-ref`. Following it reintroduces exactly the bug this branch was corrected for: a called workflow inherits the caller's event context, so a release would rebuild the site root from the tag. Both blocks now match the shipped files, with the reasoning recorded once in Global Constraints. The five /Users/tyler paths are the only ones in any committed plan here; the other two use repo-relative commands throughout.
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📝 WalkthroughWalkthroughThe change adds versioned GitHub Pages publishing. A site assembler validates stored releases and creates ChangesVersioned Pages publishing
Estimated code review effort: 4 (Complex) | ~45 minutes Mergeability Score: 🟡 Moderate · up to This change adds permanent versioned release renders, but rerunning a stable tag may still fail or replace an existing historical render. A release page could therefore become unavailable or change unexpectedly, so the tag rerun behavior should be fixed or explicitly accepted before merging. Sequence Diagram(s)sequenceDiagram
participant StableTag
participant ReleaseWorkflow
participant PagesStore
participant PagesWorkflow
participant GitHubPages
StableTag->>ReleaseWorkflow: trigger stable release
ReleaseWorkflow->>PagesStore: store rendered version and manifest
ReleaseWorkflow->>PagesWorkflow: invoke with render-ref main
PagesWorkflow->>GitHubPages: publish current and stored renders
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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In @.github/workflows/pages-release.yml:
- Around line 82-104: Update the “Write the version into the store” step to make
publication immutable and rerunnable: when store/v/$TAG/index.html already
exists, verify it matches render/index.html and that versions.json already
contains TAG, then exit successfully; fail without modifying files if either
check fails. For a new version path, retain creation, version registration,
commit, and push, while avoiding an empty git commit on retries.
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.github/workflows/lint.yml.github/workflows/pages-release.yml.github/workflows/pages.yml.gitignoreREADME.mddocs/superpowers/plans/2026-08-13-versioned-pages-publishing.mddocs/superpowers/specs/2026-08-13-versioned-pages-publishing-design.mdscripts/assemble_site.pyscripts/test_assemble_site.py
Two coupled defects in the store write, both about re-running a tag. `cp render/index.html` published exactly one file while `git add "v/$TAG"` staged a directory. `-i` yields one self-contained file today, so the two agreed by accident; a render that ever emitted a sibling asset would have published a half-complete version, and the truncation guard only checks index.html so it would not have noticed. Copy the whole render instead, and clear the directory first so "a re-run overwrites" is literally true rather than merely usually true — a plain copy leaves behind files an earlier render produced and this one no longer does. Separately, a re-run whose render matched byte for byte staged nothing, and a bare `git commit` then exited nonzero and took `deploy` with it. Nothing staged means the store is already correct, which is success. Verified by simulating all three paths against a scratch store: a sibling asset is published, a byte-identical re-run no-ops and stays green, and a stale file from an earlier render is gone after the next publish.
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Why
pages.yml(#458) publishes one rendered report tohttps://xctesthtmlreport.github.io/XCTestHTMLReport/on every merge tomain,replacing whatever was there. The site can therefore only ever answer "what does
the report look like right now."
It cannot answer "what did the report look like in 3.0" — a question with
practical weight, because 4.0 deliberately breaks the report's visual contract
(#439) and because this tool's users are running released versions, not
main.What
Release renders are published alongside
main's, under versioned paths:Stable releases only, forward-only — no backfill of 2.x or 3.0.0.
The constraint that shapes everything
actions/deploy-pagesreplaces the entire site on each deployment; there isno incremental publish. So every deploy must upload
main's render and everyversion, which means versions have to persist outside the run.
Per-commit versioning was measured and rejected: the live site is 11,096,947
bytes,
maintakes ~190 commits/year, so 11.1 MB × 190 ≈ 2.1 GB/year againsta 1 GB Pages limit — exceeded within about six months. Per-release versioning
costs ~44 MB/year.
Pieces
pages-site— an orphan branch holding only immutable version renders plusversions.json, a flat array of tags. It is both the declared inventory thetruncation guard checks against and the input the listing is generated from, so
the two cannot disagree.
main's render is deliberately not stored: itchanges 190 times a year and is cheap to regenerate.
scripts/assemble_site.py— deletes the store's.git(otherwiseupload-pages-artifactpublishes the store's git history as browsable files),generates
/v/index.html, and runs the guards.pages.yml— now checks the store out into_site/, calls the assembler,and gains
workflow_call. No write permission anywhere in this path, whichis the main security property: the workflow that runs ~190 times a year only
reads.
pages-release.yml— on a stable tag, renders the tag, writesv/<tag>/index.htmlinto the store, thenuses: ./.github/workflows/pages.ymlso assembly and deployment exist in one place.
contents: writeappears inexactly one job across both workflows.
Guards
Each prevents a green build that loses data:
_site/v/*is counted againstversions.json; fewer thandeclared fails the run. Without it a version silently vanishing from a deploy
looks like success.
headroom rather than a Pages rejection at 1 GB.
v/<tag>/rather than appending.pages-sitealready exists carryingversions.jsonas[],so the first run does not fail checking out a missing branch.
versions.jsonis written only after a successful render, so a failed buildcannot leave the store declaring a version whose directory does not exist.
Two things worth reviewing closely
render-ref. A called workflow inherits the caller's event context, so atag-triggered call to
pages.ymlwould have rebuilt the site root from the tagrather than
main— rolling/back until the next merge, and contradicting"
/staysmain's render".pages.ymltherefore takes a requiredworkflow_callinput consumed asref: ${{ inputs.render-ref || github.sha }}.The
|| github.shais deliberate: it does not rely onactions/checkout'sempty-
refbehaviour, so the push-to-mainpath is provably unchanged.The concurrency groups are different on purpose.
pages-release.ymlusespages-store, notpages. It callspages.ymlas a reusable workflow, and acalled workflow evaluates its own
concurrency— sharing the group would makethe call wait on a group its own caller holds, and the run would deadlock.
Testing
scripts/test_assemble_site.py— 14 cases, stdlibunittestonly, no newdependency — wired into
lint.yml's existing ubuntushelljob. It asserts onreal behaviour (exit codes, emitted
::error::text, files on disk).The suite was validated by a negative control: nine separate mutations, one
per guard, were each caught. The
v/.gitkeepcase matters most — the real storeships that file, and if it were ever treated as an undeclared version it would
fail every merge to
mainuntil the first release.zizmor --min-severity low .github/workflows/andactionlintare clean onevery workflow touched.
Before the first release — needs a maintainer action
pages-sitehas no branch protection (gh api repos/:owner/:repo/branches/pages-site/protection→ 404). The truncation guardcompares
versions.jsonagainst the tree, but both come from the same checkout,so they move together: a force-push or hand-edit removing a version and its
manifest entry produces a self-consistent store, a green run, and a deploy that
permanently deletes that version. The store is the only copy outside the
published site.
Add a ruleset blocking force-push and deletion, allowing
github-actions[bot]topush. It cannot be a review requirement —
publish-versionpushes unattended.What this PR does not prove
pages.ymltriggers only on push tomain,workflow_dispatchandworkflow_call;pages-release.ymlonly on a stable tag push. Neither can beexercised by a pull request run. After merge:
gh workflow run "Demo Site" --ref mainExpected: both jobs green and
assembled _site: 0 version(s)— zero versions iscorrect before the first release, and
/v/will be a valid but empty listinguntil the first stable tag.
The
github-pagesenvironment already carries thetag: *.*.*policy that therelease path needs; the stable-only filter is
pages-release.yml's trigger glob,not that policy.
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Summary by CodeRabbit
New Features
Bug Fixes
Tests
Documentation