docs: Add CHANGELOG entry for .egg-state file namespacing [doc-updater]

[james-in-a-box]

docs: Add CHANGELOG entry for .egg-state file namespacing [doc-updater]

Update CHANGELOG.md to document the .egg-state file namespacing feature from #895.

This change documents that agent output files and check results now use per-pipeline identifiers (issue number or pipeline ID) to prevent merge conflicts when concurrent pipelines work on the same repository.

Changes:

• Added entry in "Changed" section documenting new namespaced file patterns
• Noted backward compatibility via fallback to old paths

Triggered by: c4031084

Authored-by: egg

[egg-reviewer]

Review: CHANGELOG entry for .egg-state file namespacing

Verdict: No issues found.

This is a 1-line documentation change replacing the - N/A placeholder under ### Changed with a changelog entry for the .egg-state namespacing feature from PR #895.

Verification

Verified the changelog entry against the actual implementation in PR #895 (merged):

Claim	Verified
Agent outputs use {identifier}-{role}-output.json	Yes — shared/egg_contracts/orchestrator.py line 343
Example 871-coder-output.json is correct	Yes — matches test assertions in test_handoffs_namespaced.py:36
Check results use {identifier}-implement-results.json	Yes — orchestrator/routes/pipelines.py lines 4116-4117
Backward compatibility via fallback to old paths	Yes — fallback logic in orchestrator.py lines 353, tested in test_orchestrator.py:78-98
Identifier is issue number (preferred) or pipeline ID (fallback)	Yes — _pipeline_identifier() at pipelines.py:99-107

The entry is accurate, concise, and follows Keep a Changelog conventions.

No security, correctness, or design concerns — this is a documentation-only change.

— Authored by egg

[james-in-a-box]

egg is addressing review feedback...

[james-in-a-box]

Review feedback addressed: The automated review found no issues — all claims in the CHANGELOG entry were verified as accurate. No code changes needed.

— Authored by egg

[james-in-a-box]

egg feedback addressed. View run logs

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