VCSDD Convergence Detection

When to Activate

• Phase 6 (convergence check)
• Comparing adversary review iterations
• Detecting hallucinated file references

Four Convergence Dimensions

1. Finding Diminishment

Compare finding counts across iterations:

Iteration 1: 8 findings
Iteration 2: 4 findings  <- diminishment ok
Iteration 3: 6 findings  <- NOT diminishing (re-review needed)

Convergent when: monotonically decreasing OR zero findings.

2. Finding Specificity (Hallucination Detection)

For every finding, verify evidence.filePath is a real file:

for finding in .vcsdd/features/<name>/reviews/sprint-*/output/findings/*.json; do
  filepath=$(jq -r '.evidence.filePath' "$finding")
  ls "$filepath" 2>/dev/null || echo "HALLUCINATED: $filepath in $finding"
done

Convergent when: zero hallucinated file paths.

3. Criteria Coverage

All contract criteria must have been evaluated:

• Read contracts/sprint-N.md for all CRIT-XXX IDs
• Verify each CRIT-XXX appears in grading verdict Convergent when: all criteria evaluated.

4. Duplicate Detection

Compare current findings against previously-addressed findings:

• A finding is a duplicate if it describes the same issue as a FIND-XXX that has resolution.status = "fixed" Convergent when: zero duplicates.

Convergence Verdict

CONVERGED = all 4 dimensions satisfied
NOT CONVERGED = any dimension fails -> route back to Phase 3
ESCALATE = convergence iteration limit (2) exceeded -> human review