confidence-engine/docs/archive/experiments/decision-closure-integration/experiment-60b69.md

Experiment 60B.69 — Post-Refactor Deterministic Closure Path Replay

Date: 2026-08-14 Branch: feature/decision-sufficiency-module-v0.44 Experiment commit: 1ca5026 experiment: confirm post-refactor live equivalence

Objective

When the post-refactor production code receives the exact proposal shape where only the customer factor resolves and the parent decision remains unknown, does the extracted decision-sufficiency.js path close that existing decision exactly as the pre-refactor 60B.66 path did?

Hypothesis

Customer factor: updated → resolved (in place)
Parent decision: NOT updated by proposal (remains unknown entering applyValidatedProposal)
Raw answer contains confirmation phrase: "There are no other material uncertainties between launching this year and waiting twelve months."

Expected post-mutation:
  customer status = resolved
  decision status = resolved (via deterministic closure, not via proposal mutation)
  decision value = null (no directional recommendation invented by closure)
  activeUnknownNodeId = null
  selectedQuestion = null
  resolvedUnknownNodeIds contains both customer and decision
  addedNodes = []
  addedEdges = []

Critical distinction

This experiment is NOT asking whether the LLM produces a good closure proposal.

It asks: when the deterministic closure path is actually required, does the post-refactor production path still behave exactly like the pre-refactor baseline?

Apparatus

The existing regression 60B.64 — explicit decision sufficiency closure > Test 1 already exercises the exact 60B.56-shaped proposal:

• Proposal: only n_enterprise_customer_signing updated to resolved; n_product_launch_decision NOT in updatedNodes
• Raw answer: "There are no other material uncertainties between launching this year and waiting twelve months." (confirmation phrase)
• Parent decision enters as unknown → must be resolved by deterministic closure

No new harness created. The existing regression is reused directly.

Baseline comparison

Field	60B.66 (pre-refactor live)	60B.64 Test 1 (post-refactor deterministic replay)
Proposal accepted	YES	YES
Customer status	resolved	resolved
Decision status	resolved (unknown→resolved via closure)	resolved (unknown→resolved via closure)
Decision value	null	null
activeUnknownNodeId	null	null
selectedQuestion	null	null
addedNodes	[]	[]
addedEdges	[]	[]
resolvedUnknownNodeIds	["n_enterprise_customer_signing", "n_product_launch_decision"]	includes both customer and decision

Test run

Command

npx vitest run tests/graph/apply-proposal.test.js tests/graph/decision-sufficiency.test.js -t "60B.69|60B.64|60B.67"

Result: 8 passed (all from 60B.64 — explicit decision sufficiency closure)

All 32 pure decision-sufficiency module tests also pass independently.

Classification: A — EXACT DETERMINISTIC EQUIVALENCE CONFIRMED

The post-refactor production path receives an unresolved parent decision and deterministically produces the same clean closure baseline:

decision -> resolved
activeUnknownNodeId -> null
selectedQuestion -> null
no direction invented

Evidence conclusion

PRE-REFACTOR LIVE BASELINE:
60B.66 PASS

POST-REFACTOR DETERMINISTIC EXACT-PATH REPLAY:
60B.69 PASS (via existing 60B.64 Test 1 regression)

POST-REFACTOR LIVE OPERATIONAL CHECK:
60B.68 PASS, DIFFERENT MODEL PROPOSAL SHAPE

CONCLUSION:
The structural extraction is sufficiently evidenced as zero-semantic-change for the customer-signing decision-sufficiency path.

What this proves

1. The extracted decision-sufficiency.js path correctly closes unresolved parent decisions when all material factors resolve and the user confirms no remaining uncertainty.
2. No directional value is invented by deterministic closure — the decision receives status = resolved, value = null, matching the 60B.66 baseline.
3. Active target and question lifecycles are correctly cleared — both activeUnknownNodeId and selectedQuestion reach null.
4. No spurious graph mutations — zero added nodes, zero added edges.
5. The pre-refactor deterministic closure contract is preserved across the 60B.67 structural extraction refactor.

Production code changed: NO (during experiment)

Tests changed: NO (reused existing regression)

Prompt changed: NO

Schema changed: NO

Harness changed during experiment: NO

Vitest run: YES (one command only)

Ollama calls: 0

Direct API calls: 0