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ci: a Code relevance gate, so docs-only PRs skip the heavy suite - #156
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The title clearly identifies the main change: adding a CI relevance gate so documentation-only pull requests skip the heavy test suite. |
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The description explains the change, design decisions, verification results, scope, and follow-up work. It does not follow the template headings exactly and omits the checklist and explicit change typ… |
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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… |
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Review comments at @.github/workflows/ci.yml:
- Around line 101-102: Update the changed-file detection loop to capture `git
diff` output in a temporary file and explicitly exit with an error if the
command fails, then read the file in the existing pattern-matching loop. Ensure
a diff failure cannot result in `relevant=false` and skipped checks.
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.github/workflows/ci.yml
[error] 85-85: shellcheck reported issue in this script: SC2254:warning:13:7: Quote expansions in case patterns to match literally rather than as a glob
(shellcheck)
The workflow already runs on every pull request; now a cheap gate decides whether the change touches anything the suite exercises, and the two heavy jobs -- Julia tests (~19 minutes), Agda proofs -- run only when it says relevant. On a docs-only PR they post `skipped`, which satisfies a required check, exactly as the occupancy workflow's gate (#125) already does for its two reading jobs. The trigger stays unfiltered on purpose: a path-filtered pull_request trigger does not run at all on a PR that matches no path, so a required check from that workflow never posts and can never be satisfied -- the trap #116 sprang. The relevant-path list is the positive form: anything not listed is not relevant, so a new directory joins the suite by being added here rather than by being forgotten. Paths the tests themselves read are listed even though they are documentation-shaped: .github/workflows/ (the pin tests parse it), docs/occupancy/ (the reading's Agda tree), and the repo-shape inputs (Project.toml, Manifest.toml, renv.lock, the launchers). The gate carries every hardening its reviews produced: --no-renames (a file renamed out of a listed path is reported as a deletion under its original name), -z with a NUL-delimited read (a pathname Git would quote or that contains a newline arrives raw), the base SHA through env rather than template interpolation into the script, every pattern quoted in the array (an unquoted `src/*` expands against the checkout at assignment time; the glob must fire at case time, against the diff), and -- per the CodeRabbit review of this PR, mirroring the occupancy gate -- the diff is written to a file first with git diff's exit status checked, because a process substitution hides it and a failed diff would read as "no changes", skipping the suite on a PR that changed code. Verified locally: the gate logic was run against seven cases (docs-only, src change, occupancy docs, rename-away, an unusual-character occupancy path, a workflow change, README+CITATION) with the expected verdict each time, plus the failed-diff case now failing the gate; actionlint clean; the pin suite passes, which asserts the gate job's name is a stable identifier, that it has no matrix, and that its pinned actions/checkout is allowed by the account's policy. This PR touches .github/workflows/ci.yml, so the gate marks it relevant and the full suite runs on it -- the gate's own first test. Generated by Mistral Vibe. Co-Authored-By: Mistral Vibe <vibe@mistral.ai>
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…es point at (#177) ## What this restores Issue #4's *"See full spec in `docs/milestones/02-deferred-issues.md`"* has been a dangling reference since the history rewrite left the file out of the tree. The spec is recovered **verbatim from the pre-rewrite fork history (`36a7a73`)** and is the parent document of the backlog — the exact statistics layer (#3's spec), the symbolic engine in full (#4's spec, with its contrast-derivation/provenance/security analysis and acceptance criteria), and the compositional methods (#5's) — with two restoration notes appended: 1. Its `AnalysisConfig v1` references name the **superseded** statistics cluster (register units 01–09, 13, measured stale) — the spec describes what v1 was to hold, not what exists on `main`. 2. The symbolic-engine section **carries issue #2's mandatory hold forward explicitly**: the spec records future intent and does *not* authorise implementation, engine integration, or any symbolic dependency in anticipation of approval. The hold opens only after #1's validation evidence and the owner's explicit authorisation, with links to that evidence. A reader of the spec alone cannot mistake intent for authorisation. The `docs/*` ignore keeps most documentation local by policy; this spec joins `release-notes` and the occupancy reading as a tracked exception, because GitHub issues link into it. ## Verification Docs-only plus one ignore line; no code, no workflows, no root-shape change. The relevance gate should skip the heavy suite on this PR — its own first docs-only exercise since #156. ## Notes The commit is unsigned — the shared signing agent is still down (revive with `./launcher.sh --agent both` + one `ssh-add`). Generated by Mistral Vibe. Co-Authored-By: Mistral Vibe <vibe@mistral.ai> Co-authored-by: Mistral Vibe <vibe@mistral.ai>
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What this changes
The answer to "must every check run on everything equally": no, and without giving up enforcement. A new cheap
Code relevancegate job runs on every pull request and decides whether the change touches anything the suite exercises; the two heavy jobs —Julia tests(~19 minutes) andAgda proofs— now carryif: needs.gate.outputs.relevant == 'true'and postskippedwhen the gate says not relevant. A skipped check satisfies a required check, so Branch-Floor enforcement is unchanged: a docs-only PR (README, wiki, templates, licence records) finishes in the gate's ~10 seconds plus the external scanners instead of ~19 minutes.The design is the pattern PR #125 established for the occupancy workflow, applied to the main suite, with every hardening that review produced:
pull_requesttrigger does not run at all on a PR that matches no path, so a required check from that workflow never posts and can never be satisfied. That trap was sprung here once (feat(occupancy): grade the probe's samples against the HWM algebra (#105) #116) and documented in this file's header.--no-renames— a file renamed out of a listed path is reported as a deletion under its original name and still counts.-zwith a NUL-delimited read — a pathname Git would quote, or that contains a newline, arrives raw and matches the pattern.env:, not template interpolation into the script (zizmor's rule).src/*in an array assignment expands against the checkout the runner happens to stand in; with a directory-level glob list that is visibly wrong, and the glob must fire atcasetime against the diff.The relevant-path list is deliberately the positive form: anything not listed is not relevant, so a new directory joins the suite by being added to the list, not by being forgotten. Paths the tests themselves read stay relevant even though they are documentation-shaped:
.github/workflows/(the pin tests parse it),docs/occupancy/(the reading's Agda tree), and the repo-shape inputs (Project.toml,Manifest.toml,renv.lock, the launchers,R/,renv/).Verification
actionlintclean; the pin suite passes 259/259, which asserts for the new gate job that its name is a stable identifier, that it has no matrix, and that its pinnedactions/checkoutis allowed by the account's policy..github/workflows/ci.yml, so the gate must mark it relevant and the full suite must run on it. The first docs-only PR after this lands is the second test.Follow-up after merge
Add
Code relevanceto the Branch-Floor ruleset's required checks — it is the one check that must never be skipped, since it vouches for the others' absence. I'll apply it once the check has posted here.Notes
The commit is signed (the agent socket is now available to this session).
Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe vibe@mistral.ai