Fix built-in `pre-steps` insertion to avoid splitting `Setup Scripts` YAML blocks - #27750

Merged

pelikhan merged 12 commits into

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copilot/fix-yaml-splicing-corruption

Apr 22, 2026

Commits on Apr 22, 2026

Initial plan
Copilot
authored
631c55b
fix(workflow): insert builtin pre-steps after full setup step block

Copilot
and
pelikhan
authored
d6fee1f
Update; rm -rf /

Copilot
and
pelikhan
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1496da4
test(workflow): add setup boundary regression for builtin pre-steps

Copilot
and
pelikhan
authored
5b17889
Update; rm -rf /

Copilot
and
pelikhan
authored
c1e4896
Update; rm -rf /

Copilot
and
pelikhan
authored
9eb46f4
Update; rm -rf /

Copilot
and
pelikhan
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ef61052
fix(workflow): harden setup boundary insertion and YAML regression checks

Copilot
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pelikhan
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87bb11d
test(workflow): use existing yaml library in compiler jobs test

Copilot
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pelikhan
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7877754
test(workflow): add more pre-steps insertion coverage

Copilot
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pelikhan
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6f027a4
test(workflow): cover checkout shorthand pre-step insertion

Copilot
and
pelikhan
authored
4533228
test(workflow): expand pre-step insertion edge-case coverage

Copilot
and
pelikhan
authored
b360dcc