fix: docs: verify #648 already implemented (closes #818)

docs/issue-648-verification.md

@@ -0,0 +1,35 @@
+# Issue #648 Verification — Session Harvest Report
+
+**Date:** 2026-04-14  
+**Verified by:** Timmy-Sprint  
+**Issue:** timmy-home #648 — session harvest report  
+
+## Conclusion
+
+Issue #648 deliverables already exist on `main`. No re-implementation needed.
+
+## What exists on `main`
+
+1. **Session harvest report artifact**  
+   `reports/production/2026-04-14-session-harvest-report.md` — present and complete with all required sections.
+
+2. **Regression test**  
+   `tests/test_session_harvest_report_2026_04_14.py` — present, covers:
+   - report file existence
+   - required heading sections
+   - verified PR references and state-drift notes
+   - follow-up issue state changes
+
+## Fresh verification run
+
+Cloned `main` from scratch, ran:
+
+```
+python3 -m pytest tests/test_session_harvest_report_2026_04_14.py -q
+```
+
+All tests pass. The artifact and its regression test are in place.
+
+## Action
+
+Issue #648 is a zombie — the work was completed but the issue was never closed. This verification note ties the existing artifact back to the original issue so it can be closed without re-doing work.

tests/test_issue_648_verification.py

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+"""Regression test: verify issue #648 deliverables exist on main."""
+
+from pathlib import Path
+
+DOCS = Path('docs/issue-648-verification.md')
+REPORT = Path('reports/production/2026-04-14-session-harvest-report.md')
+TEST = Path('tests/test_session_harvest_report_2026_04_14.py')
+
+
+def test_verification_doc_exists():
+    assert DOCS.exists(), 'docs/issue-648-verification.md must exist'
+
+
+def test_verification_doc_has_required_content():
+    text = DOCS.read_text(encoding='utf-8')
+    for token in [
+        '#648',
+        'session harvest report',
+        'main',
+        'zombie',
+        'already exist',
+    ]:
+        assert token in text, f'Missing token: {token}'
+
+
+def test_session_harvest_report_exists():
+    assert REPORT.exists(), 'Session harvest report artifact must exist'
+
+
+def test_session_harvest_test_exists():
+    assert TEST.exists(), 'Session harvest regression test must exist'