Read-only inspection of 8 files (prompt-builder.js, schema.js, utils.js,
apply-proposal.js, orchestrator.js, experiment-60b1.md, experiment-60b2.md,
current-handoff.md). No code changes.
Key findings:
- Prompt has no independent materiality/sufficiency rule (Rule 20 says null
selectedQuestion when 'no consequential unresolved unknown' but doesn't define
what makes an unknown non-consequential)
- Validator performs structural checks only, no evidence sufficiency evaluation
- No cross-option comparison logic in propagateResolvedChildEvidence
- Schema has no materiality or couldChangeDecision field
- 60B.1 resolved WITH 'no other material differences' cue; 60B.2 continued
WITHOUT it, despite internally computing ~3.6 month payback
Classification: C — NO SUFFICIENCY RULE + CONTINUATION BIAS
Missing distinction: MATERIALITY / DECISION-RELEVANCE RULE
Diagnoses the root cause of the persistent pattern from 59B.2-59B.4
where explicit dual-option input collapsed into a single undifferentiated
unknown node. Concludes the graph vocabulary lacks first-class primitives
for options/decisions (not primarily a prompt issue). Identifies three
missing primitives: option node kind, decision node kind, alternative_of
edge type. Recommends ~25-line schema addition for 60A.2 implementation.
Add FIXTURE_MODE=updateOnly support that bypasses Start and sends the
committed fixture (tests/fixtures/pre-anchored-update-savings-realism.json)
directly as an Update request body through production HTTP route.
scripts/reproduce-multi-turn-investigation.mjs:
- Added ESM imports for deterministic fixture loading (fs, fileURLToPath, path)
- Added FIXTURE_PATH constant pointing to committed fixture
- Added fixtureMode env-var selector and runUpdateOnlyMode() function
- Validates ANSWER_2 before any live call (zero calls if missing)
- Verifies single savings-realism anchor invariant on load
- Preserves all hardened capture fields in pre-anchored mode
- Normal-mode Start→Update chain preserved under guard clause
tests/reproduce-multi-turn-investigation.harness.test.js:
- Added 7 new harness tests for pre-anchored scenarios (46 total, all pass)
- Updated runPreAnchoredSimulation to persist rejectedProposalSnapshot on rejection
- Added runPreAnchoredSimulationWithBlock() helper
docs/:
- New docs/experiment-57j78.md with full apparatus description
- Updated docs/current-handoff.md with 57J.78 section
robbond