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+# EAW-7 — Chess Thought-Git T0+63 lookahead: temporally strict worlds and independent oracles
+
+**Status 2026-10-27:** docs-only independent main-based research gate. No test executed, no new executor, source mutation, abi/runtime/merge permission. Companion idea ledger [EAW-6 #1826](https://github.com/AdaWorldAPI/lance-graph/pull/1826); existing owner [EAW-4 #1824](https://github.com/AdaWorldAPI/lance-graph/pull/1824). Do not duplicate Thought-Git, temporal.rs or Stockfish search.
+
+## Question
+Can a borrowed, as-of chess position spawn at most 63 resident legal *hypothetical futures* through existing Thought-Git while all real historical future observations and teacher labels stay unreadable to the Strict selector? Can independent oracles establish exact world contents and distinguish in-world move composition from incompatible sibling landing?
+
+## Exact owner interfaces audited
+- `lance-graph-planner/src/temporal.rs`: canonical temporal epistemology, `QueryReference::at(v,0)`, `EpistemicMode::{Strict,Aware,Retro}`, `classify`/`deinterlace`. Default QueryReference uses unbounded head, NOT safe for hindsight-blind evaluation. Temporal classification is not chess legality or quality.
+- `lance-graph-contract/src/temporal_pov.rs`: independent range-only filter `TemporalPov::at(v,0).admits(u)`; not a replacement for planner epistemic source/data readiness.
+- `stockfish-rs/examples/temporal_replay.rs`: existing NNUE HalfKA per-ply version stream with historically documented 34/34 baseline projections, 11/11 out-of-order accumulator replays; model-gated, not Thought-Git worlds.
+- `stockfish-rs/examples/hindsight_stream.rs`: current-ply read fence and independent PGN result; `rung_hindsight.rs` previous final-NNUE-sign oracle INCONCLUSIVE for sacrificial mates/unsettled random games.
+- `stockfish-rs/docs/DECISION-EPISODE-V1.md`: distinct PositionKey, GameEpisodeKey, evidence address, StrictObservation, RetroLabel; exact per-candidate teacher bounds only from `trace::teacher_search` full-window evaluator.
+- `stockfish-rs/.claude/plans/stockfish-harvest-64x64-v1.md`: D-CHESS-NARS-0 actual NARS learning / teacher-withdrawal owner, no second chess search or policy.
+- `crates/thought-git-probe/src/oracle.rs`, CFA-2 [#1815](https://github.com/AdaWorldAPI/lance-graph/pull/1815), EAW-4 [#1824](https://github.com/AdaWorldAPI/lance-graph/pull/1824): T0 sealed, T1..T63 independent speculative slots; `next_version` sibling union is a comparison instrument, not one world. CE64 W 53..58 is *live* slot ordinal, generation and durable replay witness external (EXO-98/148).
+- `shakmaty`: chess legal movegen, FEN, apply/unapply and terminal condition oracle. Never let the candidate model hallucinate legal moves. Real Stockfish C++ deep search optional independent privileged teacher; pure position semantics remain shakmaty.
+
+## Semantic experiment grammar (proposal only)
+T0 = { game_id, ply=v, exact board/FEN + side/castling/ep, QueryReference::at(v,0), source/game/engine/net/feature-codebook versions, completeness and permissions }. T0 is immutable.
+
+Each active T_i, 1≤i≤63 = {slot, generation, baseline_ref, parent-world/path, selected legal UCI, local simulated position, NNUE delta receipt, consumed-node budget, protected intermediate move/guard/effect trace, world identity}. Simulated descendants may be at hypothetical ply v+k, but `historical_read_allowed(u)` stays bounded by `u≤v`, including PGN and teacher labels. Logical search depth is NOT 63; recycle slots with generation checks between frontiers. Alternative siblings never become a physically committed combined board; multiple legal move steps within one single path compose normally.
+
+Represent chess legal constraints with source evidence and simulated legal successor transitions. Do not treat speculative moves as real future events in `TemporalPov` or as empirical evidence roots. PositionKey can be shared for exact transpositions but distinct episode/path provenance must be retained; hashing collisions and equivalence conditions need independent checks.
+
+## Smallest proposed test-only probe (separate owner authorization)
+Fixture A: one deterministic midgame FEN, 3–8 legal candidates including a tactical trap and two distinct routes to a transposition; fixture B: a capture, castle/king-bucket refresh, promotion or en-passant special move, and a terminal mate. Pin two independent game histories with same exact board but separate EpisodeKeys.
+1. Seal T0 and enumerated legal move set from shakmaty, independent of Thought-Git.
+2. Branch legal selected candidate moves T1..Tmin(63,budget); capture generation-aware IDs, paths and source versions.
+3. Compute board and legal transitions for each branch using shakmaty; compare every occupied world to an independent from-start replay and hash/full board equality, not score only.
+4. Enforce Strict present read only on real history through explicit `QueryReference::at(v,0)` / `TemporalPov::at(v,0)`; the simulated successor is separately typed `Hypothetical`, not a spoiler read.
+5. Run the same candidate selection after replacing all future PGN plies, result and deep teacher labels; identical Strict result must follow. Deeper teacher revealed only after.
+6. Compare bounded breadth/reuse under T1..T63 occupancy pressure, ABA generation reuse and exact explicit independent world records. Cold budget includes source opening, masks, fork, movegen, replay and numerical refresh.
+7. Test sibling union by passing incompatible world results to general `next_version`: the union may be a valid comparison receipt but MUST NOT be exposed as a legal chess state or new historical episode.
+
+## Pre-registered red/green falsifiers (NOT RUN)
+| ID | Falsifier | Correct behavior |
+|---|---|---|
+| CHT-01 | Future historical ply v+1 or result injected into Strict input | Reject; same selected candidates after every Retro mutation |
+| CHT-02 | Use default unbounded QueryReference instead of explicit as-of | Gate detects historical future admission |
+| CHT-03 | Hypothetical T1 move becomes a real source observation | Reject cross-namespace contamination |
+| CHT-04 | Two sibling moves both committed into one board | Reject world interpretation; only a comparison receipt allowed |
+| CHT-05 | Recycle W=slot without external generation seal | Stale token refuse, T0 unchanged |
+| CHT-06 | Two different game episodes share exact transposition board | Share position representation only, retain distinct historical/derivation roots |
+| CHT-07 | Pawn promotion, en passant, castle rights or 50-move clock lost by projection | Independent game-state oracle mismatch |
+| CHT-08 | Mate tactic labelled by final NNUE sign | Reject oracle; use mate-aware teacher / actual PGN result later |
+| CHT-09 | No slots remain or path horizon >63 | Capacity management explicit; never overclaim 63 parallel ply |
+| CHT-10 | Teacher/real future alters STRICT trace, scores or candidate ranks | Zero tolerated contamination |
+| CHT-11 | Feature/evidence values from different source revisions share local ordinal | Rebind or refuse under DT64 Q0 |
+| CHT-12 | Different branch enumeration order changes any deterministic complete-world outcome | Must remain equivalent after normalizing candidate IDs, except declared budget-limited search-policy order effect |
+
+## Benchmarks / exit decisions
+Compare (A) vanilla legal shallow search / frozen ordering, (B) identical search and borrowed Thought-Git receipt overlay, (C) eventual NNUE delta heuristic from EAW-8; no neural claim in this stage. Report slots resident, batches, candidate/legal count, exact replay matches, world contamination count, future admissions (must be zero), cold/warm setup, heap, branch and generation overhead. Prefer a tiny falsifiable proof to speculative throughput.
+
+Exit: REVIEW for a separately approved test-only PR only when owner confirms world/temporal membrane. Otherwise DEFER. No production DR³ third axis (NFR-OP-2), escaped Keep (NFR-OP-1), new time store, new engine, teacher selection, source action, or law admission. [#1812](https://github.com/AdaWorldAPI/lance-graph/pull/1812) excluded epistemically. EXO-46/98/109/133/148/50 relevant; EXO-50 messages are not recipient ACKs.