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fix(sdk): anchor extractFrontmatter at file start (#3240) (#3247)

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* test: reproduce extractFrontmatter LAST-block bug (#3240)

* fix(sdk): anchor extractFrontmatter at file start (#3240)

* changeset: pr=3247 for #3240
This commit is contained in:
Tom Boucher
2026-05-08 08:40:30 -04:00
committed by GitHub
parent 447763411a
commit b2f0fdf250
5 changed files with 122 additions and 12 deletions
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51
sdk/src/plan-parser.test.ts
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@@ -217,6 +217,57 @@ describe('extractFrontmatter', () => {
const result = extractFrontmatter('');
expect(result).toEqual({});
});
it('returns the LEADING block when body contains markdown horizontal rules', () => {
// Regression: LAST-block semantics picked up body separators as frontmatter (#3240)
const content = [
'---',
'wave: 3',
'autonomous: false',
'phase: 05-hardening',
'---',
'',
'## Section One',
'',
'---',
'',
'## Section Two',
'',
'---',
'',
'body text',
].join('\n');
const result = extractFrontmatter(content);
expect(result.wave).toBe(3);
expect(result.autonomous).toBe(false);
expect(result.phase).toBe('05-hardening');
});
it('returns the LEADING block when body contains embedded YAML in fenced code block', () => {
// Regression: LAST-block semantics matched YAML inside ```yaml fences (#3240)
const content = [
'---',
'wave: 2',
'autonomous: true',
'phase: 04-polish',
'---',
'',
'## Example',
'',
'```yaml',
'---',
'name: example',
'value: 99',
'---',
'```',
'',
'More body text.',
].join('\n');
const result = extractFrontmatter(content);
expect(result.wave).toBe(2);
expect(result.autonomous).toBe(true);
expect(result.phase).toBe('04-polish');
});
});
describe('parsePlan — frontmatter', () => {