test: changelog-agent - Clarify supported test folders

[ashleyshaw]

Testing / Coverage Summary

Historical request to move changelog-agent tests from agents/changelog/tests/ to agents/changelog/__tests__/. The premise that Jest requires __tests__/ was incorrect: the active .jest.config.cjs discovers both tests/ and __tests__/. The historical agents/changelog/ paths are absent on checked develop; the current agent has agents/changelog-agent/tests/. Closed as not planned in favour of #3469; no migration is requested here.

Linked Stories/Tasks/PRs/Epic

• Successor: task: support tests/ and __tests__/ and remove dead root jest.config.js #3469; standards epic: epic: align agents and skills with official standards and unblock #3434 #3464.
• Original related PR: feat: changelog-quality-audit - Phase 2 Validation Engine #3130; its presence alone does not establish delivery.

Milestones & Timeline

The existing v1.1 milestone is historical. No completed test migration or current delivery date is verified.

Action

• Action type: no new test file or folder move under this closed issue.
• Configuration to reconcile in task: support tests/ and __tests__/ and remove dead root jest.config.js #3469: .jest.config.cjs and the obsolete jest.config.js.

Proposed Test Content

#3469 should verify discovery for both supported folder conventions and reconcile documentation and obsolete configuration. No new test content is specified by this historical issue.

Scope & Applicability

Jest discovery for the changelog agent and other agents; choosing a single folder spelling is not an acceptance condition.

Acceptance Criteria

• Verify both folder conventions under the active configuration in task: support tests/ and __tests__/ and remove dead root jest.config.js #3469.
• Reconcile obsolete configuration and documentation in task: support tests/ and __tests__/ and remove dead root jest.config.js #3469.
• Do not infer passing tests from this issue's closure.

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Definition of Ready (DoR)

• Original assertion, current paths and successor identified.

Definition of Done (DoD)

• Historical request superseded by task: support tests/ and __tests__/ and remove dead root jest.config.js #3469.
• Verify successor work separately before claiming test coverage.

[linear-code]

LS-4130

[eleshar]

Superseded by #3469, part of epic #3464 (agents and skills aligned with the official AGENTS.md, Agent Skills, GitHub Copilot and Claude Code standards). The plan this issue belonged to has been replaced there. Reopen if it covers something #3464 and its children do not.