Fix path-resolution bug in `changenotes.mts validate` by using `getChangenotes` - #4156

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mario-campos wants to merge 13 commits into

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mario-campos/fix-validate-cmd

Commits on Sep 18, 2026

Do not include trailing newlines in `NO_CHANGES_STR`
mario-campos
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cb31eab
Add changelog parsing helper `getHeader`
mario-campos
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47d607e
Add CHANGELOG function `addBodyLinesToUnreleasedSection`
mario-campos
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bb1dc54
Add `changenotes.mts flush` command
mario-campos
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1ee3265
Use `withChangelog` I/O helper
mario-campos
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bffae1c
Use `ExitCode` instead of `0`/`1`
mario-campos
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b246e56
Assume '[UNRELEASED]' section is first section
mario-campos
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d63b2a4
Simplify `getHeader` to operate on `ChangelogSection`s
mario-campos
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128614a
Simplify `addBodyLinesToUnreleasedSection`
mario-campos
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bc0efd6
Replace `splice` with `push` and `pop`
mario-campos
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977b29b
Rename `flush` command to `assemble`
mario-campos
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7f54212
Refactor changenote file listing into function to D.R.Y.
mario-campos
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a92f7fb
Refactor `changenotes validate` to use helper `getChangenotes`
mario-campos
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bf6da6f