ICW Test Design — E6:S07:T115 last-modified stamp forensic integrity guardrails

Test Objectives

Verify that timestamp updates are evidence-driven, rewrite-immune, and auditable.

Test Matrix

1. No-op rewrite stability

   • Scenario: run board sort/format/reconciliation with no underlying record deltas.
   • Expected: zero row-level Last modified changes.

2. Substantive change propagation

   • Scenario: update linked task/FR/BR/UXR with substantive delta (status transition, AC progress, evidence/version anchor update).
   • Expected: only corresponding board row(s) timestamp changes.

3. Mass-churn anomaly detection

   • Scenario: attempted run proposes widespread stamp mutation without linked-source changes.
   • Expected: validator emits blocking failure or high-severity warning and reports anomaly counters.

4. Audit observability

   • Scenario: run UKW/RW board update with mixed substantive and non-substantive rows.
   • Expected: output includes rows_audited, substantive_updates, suppressed_non_substantive_updates, anomaly_flag.

5. Backward compatibility

   • Scenario: canonical + legacy board aliases present.
   • Expected: integrity guardrails apply consistently, independent of filename alias path.

Evidence Capture

• Before/after row snapshots for targeted scenarios.
• Command outputs from validators and board update runs.
• Per-run integrity counters and anomaly status.

References

• ICW Specification
• Task E6:S07:T115