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core/HANDOFF-gpt55-2026-06-20.md

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HANDOFF — GPT-5.5 — 2026-06-20

Agent and Session

  • Agent: gpt55
  • Date: 2026-06-20
  • Reasoning effort used: high
  • Grok Build mode used: Headless
  • Session entry point: implement the first PR from the semantic-substrate problem-solving master plan: close proportional-decrease contracts and make readiness obligation-sound without touching serving or derivation organs

Smoke Suite + Bootstrap Status

Read before editing:
- GPT55.md
- AGENTS.md
- docs/runtime_contracts.md
- HANDOFF-gpt55-2026-06-20.md (prior planning handoff, now superseded by this file)
- ADR-0223 audit/session pack and targeted ProblemFrame files/tests

core test --suite smoke -q
zsh: command not found: core

uv run python -m core.cli test --suite smoke -q
108 passed in 121.54s (0:02:01)

core-bootstrap skill was not available in this session; bootstrap was completed manually.

Modules Touched

File Change type Summary
generate/problem_frame.py modified extended BoundQuestionTarget with typed operator/state/direction validation so delta-decrease targets are structurally representable
generate/problem_frame_builder.py modified added narrow decrease_to_fraction binding, copular half-partition strengthening, canonical entity grounding, and richer bound target detection
generate/problem_frame_contracts.py modified added assess_fraction_decrease; tightened percent_partition to require forward aggregate topology, original whole provenance, and explicit blocker codes
scripts/gsm8k_problem_frame_adequacy.py modified surfaced blocker sets and blocker-combination aggregates by organ
scripts/gsm8k_substrate_morphology.py modified surfaced per-organ blockers and kept non-runnable decrease cases on a substrate contract-gap recommendation instead of a serving-organ recommendation
tests/test_problem_frame_builder.py modified added proportional-decrease binding/span tests
tests/test_problem_frame_contracts.py replaced added positive/negative obligation tests for fraction decrease and percent partition
tests/test_problem_frame_skeleton.py modified added BoundQuestionTarget validation coverage
tests/test_gsm8k_problem_frame_adequacy.py modified added blocker-by-organ/blocker-combination adequacy coverage
tests/test_gsm8k_morphology_missing_kernel_labels.py modified added morphology contract-gap recommendation coverage

Invariants Verified (Versor Coherence Guardian + Core)

Invariant Check performed Result Notes
` F * reverse(F) - 1
versor_apply / cga_inner exactness Manual sweep of touched files/imports Preserved No recall/ranking/operator-path changes
Normalization boundaries respected Pre-edit sweep + patch review Preserved No normalization added outside approved construction/IR boundary
No approximate recall (ANN/HNSW/cosine) Import/call-site sweep on touched path Preserved Diagnostic path remains exact/deterministic
Claim status transitions via review gates only Scope review Preserved Teaching/review/proposal paths untouched
Safety/identity pack immutability Scope review Preserved No pack, manifest, policy, identity, or recall edits
INV-21 / INV-24 / INV-29 (Vault & epistemic) Scope review + serving parity Preserved No memory mutation or serving-path widening
Wrong-zero serving Direct runner build_report() checks Preserved Train 30/20/0, holdout 5/495/0, wrong_ids == []
Readiness truthfulness Targeted adequacy reruns Improved Train runnable 1 -> 2; holdout runnable 1 -> 0; 0393 now blocked

Subagent / Arena Reconciliation (if applicable)

  • Number of subagents spawned: 0
  • Each subagent independently verified versor closure? (Yes/No): N/A
  • How were results reconciled before merge? N/A

Tests Run

# exit 0
uv run python -m pytest -q \
  tests/test_problem_frame_builder.py \
  tests/test_problem_frame_contracts.py \
  tests/test_gsm8k_problem_frame_adequacy.py \
  tests/test_gsm8k_morphology_missing_kernel_labels.py \
  tests/test_kernel_no_new_legacy_derivation_surfaces.py

# exit 0
uv run python -m pytest -q \
  tests/test_problem_frame_builder.py \
  tests/test_problem_frame_contracts.py \
  tests/test_problem_frame_skeleton.py \
  tests/test_gsm8k_problem_frame_adequacy.py \
  tests/test_gsm8k_morphology_missing_kernel_labels.py \
  tests/test_kernel_no_new_legacy_derivation_surfaces.py

# exit 0
uv run python -m core.cli test --suite smoke -q

# exit 0
uv run python -m scripts.gsm8k_problem_frame_adequacy \
  --cases evals/gsm8k_math/train_sample/v1/cases.jsonl

# exit 0
uv run python -m scripts.gsm8k_problem_frame_adequacy \
  --cases evals/gsm8k_math/holdout_dev/v1/cases.jsonl

# exit 0
uv run python - <<'PY'
from evals.gsm8k_math.train_sample.v1.runner import _CASES_PATH, _load_cases, build_report
r = build_report(_load_cases(_CASES_PATH))
print(r["counts"])
print([x["case_id"] for x in r["per_case"] if x["verdict"] == "wrong"])
PY

# exit 0
uv run python - <<'PY'
from evals.gsm8k_math.holdout_dev.v1.runner import build_report
r = build_report()
print(r["counts"])
print([x["case_id"] for x in r["per_case"] if x["verdict"] == "wrong"])
PY

# exit 0
git diff --check
git status --short
git diff --name-only origin/main...

Key outcomes:

  • train adequacy contract_runnable_count == 2
  • runnable train cases are gsm8k-train-sample-v1-0005 and gsm8k-train-sample-v1-0046
  • holdout adequacy contract_runnable_count == 0
  • gsm8k-holdout-dev-v1-0393 now blocks with inverse/original-whole topology reasons
  • serving unchanged: train {'correct': 30, 'wrong': 0, 'refused': 20}, holdout {'correct': 5, 'wrong': 0, 'refused': 495}

Open Tasks / Next Session Entry Point

  1. Inspect whether any non-0046 percent-partition candidates are now worth a narrower contract split instead of accumulating blocker lists on one forward organ.
  2. Decide whether the next substrate PR should introduce explicit typed gap records (PF-* codes as first-class data) or keep using stable blocker strings until the construction catalog lands.
  3. If a future PR starts typed adapter work, consume fraction_decrease only from ProblemFrame facts and do not reparse raw text inside any adapter or derivation organ.

Known Hazards / Do Not Touch

  • Do not edit generate/derivation/* or generate/math_candidate_graph.py to “finish” this slice. This PR is diagnostic-only and already proved serving parity.
  • The new builder logic is intentionally narrow. Do not generalize decrease_to_fraction into decrease by, percent change, or affine fraction comparison without a separate contract/confuser pack.
  • percent_partition is now deliberately stricter. A runnable-count drop elsewhere is acceptable if it removes false readiness; do not loosen obligations to make the number larger.
  • HANDOFF-gpt55-2026-06-20.md was replaced; do not rely on the earlier planning-only contents.

Architectural Decisions Made This Session

  • BoundQuestionTarget now carries typed operator/state/direction, with validation that blocks illegal delta/final combinations at construction time.
  • decrease_to_fraction is represented as a span-grounded BoundRelation in ProblemFrame, not as a derivation-organ shortcut.
  • Readiness is keyed to exact grounded IDs from the frame. Repeated entity mentions are canonicalized at relation construction so contracts can match by identity rather than lowercase text equality.
  • percent_partition requires a forward aggregate target and an original whole bound before subgroup events. Final-state/inverse prompts are blocked rather than treated as forward partition.
  • Adequacy and morphology reports now expose blocker combinations by organ, making false readiness auditable without touching serving.

What Must Not Be Forgotten

The substantive result of this session is not just “0005 runnable.” It is that runnable now means obligation-closed from ProblemFrame evidence alone: 0005 closes through decrease_to_fraction, 0046 closes only under explicit complementary-subgroup topology, and 0393 is blocked because its target is inverse/original-whole rather than a forward aggregate.

Prompt Library Reference: See docs/core-rd-base-prompts.md (especially sections #7 Standing Loop Axiom Check, #8 PR Merge-Readiness Audit, and #9 Grok Build Implementation Session). Use them as standing prefixes.

Skills Used This Session

  • core-bootstrap: not available
  • versor-coherence-guardian: not available
  • pre-edit-sweep: manual import/call-site sweep completed
  • claim-proposal-guardian: not needed
  • Other: none