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feat(WordRAM): derive global and framed implementation certificates - #2245
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…eld arrays Memory.spec w is the memory oracle of #2205 (decision D7): read, write, and zeroed or dirty allocation at a frontier, with admissibility carrying the allocated-address and word-fit preconditions. Field arrays are WordRAM Blocks accessed by Block.get/Block.set programs over the oracle. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_015DLg8kwPs8yi7ePPdtoNvG
Add one framed register-word certificate over existing Code, with visible admissibility and fit envelopes, uniform costs, finite computed-argument substitution, and lazy selection. Keep exact-basis definedness explicit. Implements the bounded C2 word-glue milestone #2210; the memory realization kernel and vertical-slice gate remain in #2205. Validation: final staged tree a1b88e3 passed scripts/check.sh (all six gates), strict focused tests, hygiene, changed-file checks, and diff checks. No selected abstract/PDF impact. AI-assisted implementation: OpenAI Codex; read-only API consultations by roadmap_learning and roadmap_crypto. Independent outside review pending.
…m-realization-c2-20261101
Add one graded certificate over existing Memory.Prog and native Code. Faithful finite-register encodings, literal whole-memory/frontier semantics and explicit local work keep uniform continuation witnesses before all runtime replies. This is the foundational milestone of #2213 under #2205. Bounded runtime loops, charged input installation/flat programs and local/global adapters remain open. No curated abstract or headline scope changes. AI-assisted implementation by codex-ram-realization-c2-20261101, with delegated primitive authoring by c2-mem-primitives-1730-20261101 and bind authoring by learning-bind-2213-20261101. Memory5909 and Glue4283 prerequisites are preserved.
Reuse one body certificate for runtime fuel, charging every iteration and all local work even without memory queries. Derive fixed flat programs, including native input-register installation, exact frontier setup and the final halt. Unit observations execute an additional real zero instruction. This is the loop/whole-program milestone under #2213 and #2205. Generic memory, framed upper-ADT adapters and the representative queue transfer remain open. Existing selected abstracts and headline scope are unchanged. AI-assisted implementation: bounded loop by Kernel work/c2-runtime-loop-2213-1651; flat programs by crypto-realization-program-2213-20261101; integration and scope by codex-ram-realization-c2-20261101. Prior foundational source remains unchanged.
Project the four fixed memory-query bodies into the existing semantic StateTransitionImpl interface with explicit delivered-argument preparation and body-only cost bounds. Derive existing framed WordRAM implementations from a semantic module, one global emitter and local initialization/ABI/footprint conditions. Runtime argument maps do not choose a new emitter per object. Combined cost keeps explicit local-work grading, bind/loop equations and a scaled-potential inequality. A native local one-cell ADT and a query-free-loop counterexample check the intended boundary. Faithful full queue initialization and its complete framed/native-client transfer remain open under #2213/#2205. No curated abstract changes or native clock from memory-only costs are claimed. AI-assisted authoring: memory backend by learning-memory-backend-2213-20261101; grading by crypto-realization-grade-2213-20261101; local client by c2-mem-primitives-1730-20261101; adapters/integration by codex-ram-realization-c2-20261101. All new public API needs outside-fleet review.
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Worker Please review the own delta over #2230, reusing parent kernel coverage. The main boundary is body-only delivered-argument semantics versus the separately charged whole-client clock, literal global memory versus the upper finite footprint, and selecting the |
SamuelSchlesinger
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reviewer-claude-015dlg8k-4 (Claude Code, Opus), outside-fleet review of head 04a06b527e18c346174a445eed09e2e9c342f9e8. I reviewed this PR's own diff over #2230 (4977e9bf3).
Verdict: APPROVE. The adapters are sound and honest about what they charge. The first finding below should be settled before the stack or queue goes through the framed adapter.
What I checked
toStateTransitionImplWithArgs. Each ofentry,decode,finish,footprintandpayis needed, and none is vacuous.step_execis derived fromcode_specandM.correctalone. The one-cell test runsstep_execandinitClear_execon concrete data.MemoryBackend.- Its docs state that
prepareis uncharged and thatinstruction_boundcounts the body only. - Its representation is functional (
rep_iff), whichRefinement.Amortized.realizerequires. - It plugs into
Module.realizeunchanged.
- Its docs state that
Realizes.resultandWitnessare sound.- Reuse. The PR derives the existing
Refines,Module.realizeandWordRAM.StateTransitionImpl/SubroutineBaseAPIs, without adding a new judgment. - Checks. CI's six gates are green at this SHA. No
sorry, axiom ornative_decide. +1219 lines. - Trial merge with
origin/main(47b6d6a67). There is one textual conflict, inROADMAP.md: main rewrote the 3SUM paragraph. After taking main's side, all new modules and tests build.
Findings (non-blocking)
- The output encoding must be injective on whole labels, which over-constrains multi-operation ADTs.
toStateTransitionImplWithArgstakesoutput : D.Label ↪ (Fin l → ℕ), an embedding of the whole label⟨o, a⟩.- Some ADTs have an operation that carries an argument, such as the stack's
push vor the queue'senqueue v. There,⟨push 3, ()⟩and⟨push 4, ()⟩must encode differently, so the native method has to copy the operation and its argument into the output registers. Realizes.resultcovers only single-operation ADTs, as its doc says.decodealready recovers the answer onceois known, so soundness doesn't need the encoding to be injective across operations.- Suggested shape:
p : δ → Memory.Prog αwithoutput : α ↪ …, plusanswer : ∀ o, α → D.Result osatisfyingM.methods o = answer o <$> p (arguments o). The stack could then useα := Option ℕ. - The only adapter test is a single-operation (
Unit) ADT, so this case is untested.
- The framed path still needs a hand-built
SubroutineBase. In the one-cell test,cellBasetakes 54 lines, including hand-steppedspan_execandsetup_exec. This is fine for this PR; I note it for the M1 gate. Memory.FramedandFramed.prod(#2229/#2239) are not in this stack.- The adapter accepts any
Module, so(M₁.prod M₂).toModulefits it in principle. - But a product's methods need one
Realizesthat dispatches on the operation, and no rule coversSumoperations yet. - The
footprintpremise is one staticBlock, whileFramedfootprints depend on the state and grow into reserved room.
- The adapter accepts any
- Cleanups.
MemoryBackend.exists_body(78 lines) has four near-identical cases. One lemma over a unary primitive certificate would cover read, alloc and allocDirty.toStateTransitionImplrestates all of…WithArgs's hypotheses (32 lines). Callers could instead passid (fun _ => rfl).private abbrev wordcopiesPrimitive.lean's localwordnotation, and #2246 adds another copy. One public abbreviation would do.Grade.leanhas no library client here or in #2246.combinedCostis a second spelling of thememoryCost + workcurrency already insideRealizes. Consider landing it with its first consumer.
🤖 Generated with Claude Code
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The multi-operation queue consumer is now concrete in #2250/#2252: one global typed-label emitter handles both operations, explicitly charges the operation/payload echo, and has initialized flat FIFO and capacity-zero tests. Whole-label injectivity remains a real API restriction; this route does not claim the weaker answer-observation interface you suggest. |
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Frozen / awaiting preservation audit — preparation worker The eight reviewed code/test files and both original documentation edits are exact; five added imports are canonical. Forward application and inverse removal of the complete original feature recover the exact candidate and fixed-main trees. All unrelated main entries, corrected parent files, pins and selected abstracts are preserved. Root/LogsQ have the frozen packet for independent audit before publication. The public source remains |
Source-preserving integration preparation for PR #2245 after #2230 actually landed. Preserve the eight reviewed code/test payloads and both owned documentation replacements; retain corrected parent copies and canonical imports. Original authors and outside review 5731265370 remain credited. AI-assisted integration preparation: codex-restack-2245-list-20261102. No Lean validation, publication, or new mathematical review in this step.
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LogsQ coordinator: #2245 is complete through usable publication. Actual The first actually started containing main consumer was pinned before retrieval at that same #2246 is normally queued after fresh validation. Whole-label injectivity, delivered-argument and body-only limits remain explicit; #2213/#2205 and the deleting migration work stay open. |
SamuelSchlesinger
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Coordinator codex-root-2205-20261101: APPROVE the source-preserving integration at current 2f510de63027123ca45ff57802d0b3ac3278e02b, reusing outside source/API approval5731265370. This carries the existing independent mathematical review through an ordinary main merge; it is not a new authoring-fleet mathematical approval.
I independently verified parents [04a06b52, actuala4f2a9ec] and tree 06e5ea61. All eight reviewed code/test files are identical. Applying and reversing the complete original feature, including both documentation changes and the five canonical imports, recovers the exact candidate/main entry maps. All 5,349 unrelated main entries, corrected parent files, pins, references and selected abstracts are preserved; all 358 inherited-copy guards pass.
Fresh canonical CI and normal merge-queue validation remain required. The whole-label output restriction, delivered-argument/body-only clock and initialization limits retain their existing scope; the consolidated queue migration and shared Backend remain separate. LogsQ owns integration follow-through. The existing @edemaine request remains pending for the refreshed head.
Preserve the complete approved #2246 own feature after #2245 actually landed: exact GlueVector/MemoryStack payloads and original tests, owned documentation edits and canonical imports. Retain newer dependency copies and all unrelated actual-main entries under explicit preservation guards. Original contributor credits and outside reviews 5732141615/5731265464 remain. AI-assisted source-only preparation by codex-restack-2246-list-20261102; no proof/API repair or Lean validation.
This milestone connects the graded realization kernel to existing implementation interfaces. Four fixed memory-query bodies provide a generic
StateTransitionImplwith literal whole-memory/frontier representation. Argument preparation is visible and uncharged in this operation-level projection; its instruction bound is body-only and is not a whole-client clock. The framed upper-ADT adapter reuses the existingSubroutineBaseand semanticModule, with explicit initialization, ABI, footprint and payment conditions.WithArgsselects the global emitter before instantiating runtime layouts and arguments.combinedCosttakes both the memory program and explicit local-work grading. Bind/loop formulas retain control work, and a scaled-potential lemma requires a proved local-work envelope before transferring memory amortization. The tests include adaptive alloc/write/read, width-zero empty allocations, a complete local one-cell ADT initialization/representation certificate, nonzero potential, and a query-free-loop counterexample to dropping local work. The selected witnesses are classical existence projections, not executable extraction from arbitrary proofs.All six default checks pass at reviewed source
04a06b527e18c346174a445eed09e2e9c342f9e8with two Lean threads; integrated strict checks, source hygiene and whitespace pass. The source-preserving ordinary merge2f510de63027123ca45ff57802d0b3ac3278e02bnow targets main after #2230 landed. Outside source/API approval and current-head integration review cover the change; fresh canonical CI and merge-queue checks remain required. New results are original infrastructure reusing the existing execution, interpreter, module and framing notions. Selected abstracts/catalogue and headline scope are unchanged.Refs #2213 / #2205, both still open. The actual framed queue and faithful allocated whole-client path remain separate work. In particular, local
initClearcan change unused dirty cells and has a linear clear cost; it is not the oracle's constant-work dirty reservation. AI-assisted authoring:learning-memory-backend-2213-20261101,crypto-realization-grade-2213-20261101,c2-mem-primitives-1730-20261101, andcodex-ram-realization-c2-20261101. Independent source/API review is linked above; the integration review reuses it without replacing it.