Thirteen test harnesses executed workflow `run:` bodies with their own bash
flags. Four of them used `bash -eo pipefail` "as in Actions", but the runner
executes a step without `shell:` as `bash -e {0}`: pipefail comes only from an
explicit `shell: bash` or from `set -o pipefail` in the body. The harness
supplied protection the step did not have, so a step that lost its pipefail
stayed green in tests (#729, #737, #751); the reverse also happened - the
#793 guard test was red only because of the harness flag.
test/helpers/workflow-step.mjs resolves the shell like the runner (step ->
jobs.<id>.defaults.run.shell -> workflow defaults.run.shell -> unset), maps it
to the runner's command lines (unset -> `bash -e {0}`, bash -> `bash
--noprofile --norc -e -o pipefail {0}`, sh, python, custom templates with
{0}), writes the body to a file and executes it by path. Unsupported YAML or
shells are refused loudly instead of guessed. All step-executing tests now go
through runStep(findStep(...)).
Witnesses: a step whose left pipeline side fails is green without a shell
(negative test) and red with `shell: bash`, job defaults or `set -o pipefail`;
the #751 executed test now also shows that the same real steps without their
pipefail line stay green, i.e. the test sees a removed pipefail; a guard fails
on any test that runs a step with its own bash flags. TESTING.md rule 7 names
the helper.
Issue: #766
User-Visible: no
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018qZfe7YS4rqEMKoVeS3GKd
`ubuntu-latest` с 19.10.2026 переезжает на Ubuntu 26, а golden, скриншоты
документации и перф-бюджеты сняты на текущем образе: все 43 job на раннере
теперь явно на `ubuntu-24.04`, один образ на все workflow. 26 job получили
`timeout-minutes` по наблюдённой длительности с запасом; гейт релиза — 180,
больше суммы собственных ожиданий (60 + 60 + 45). Расписания ушли с круглых
минут (ночь 02:17, мутанты 00:43, метрики 05:23, полный перф 04:11), ночь
пишет в summary сдвиг старта и предупреждает, если он больше часа.
test/workflow-hygiene.test.mjs держит все три правила по тексту workflow
(разбор `parseJobSettings` в scripts/workflow-jobs.mjs) и исполняет шаг
сдвига старта настоящим bash; порядок осознанного подъёма образа —
docs/DEVELOPMENT.md.
Issue: #658
User-Visible: no
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018qZfe7YS4rqEMKoVeS3GKd
