SOULVM_JIT.md

SoulVM JIT Integration

Status: Phase 3D Architecture (Ready for Implementation)
Date: 2026-07-30
Target: Runtime bytecode verification + native code generation

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Overview

What: Link Lean/Coq formal proofs directly to runtime bytecode generation.
Why: Every EmojiScript program verification → Cranelift native code (proven correct).
How: 3-stage pipeline: Lean theorems → proof certificates → JIT code generation.

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Architecture

Stage 1: Proof Extraction (Lean → Certificates)

Input: Skclisp.Equivalence.lean (proven theorems)

Output: Proof certificates (binary format):

Certificate struct:
  - theorem_id: u32                    (T01-T11 proof ID)
  - proof_hash: [u8; 32]              (Blake3 of proof)
  - theorems_covered: u32             (bitmask: T01-T11)
  - machine_state_invariants: u32     (validity checks)
  - cranelift_backend: String         ("x86_64" | "aarch64")
  - optimization_level: u8            (0=none, 1=basic, 2=aggressive)

Stage 2: Proof Certificate Validation

Input: Proof certificate + EmojiScript bytecode

Validation checks:

1. Blake3(certificate) matches on-chain WORM record ✓
2. Theorem ID covers the bytecode operations ✓
3. Machine state invariants apply to execution context ✓
4. Cranelift backend available for target architecture ✓

Output: Validated proof token (allows JIT codegen)

Stage 3: JIT Code Generation (Bytecode → Native)

Input: EmojiScript bytecode + proof token

Cranelift pipeline:

EmojiScript bytecode
  ↓ [parse emoji→SigilOp]
Intermediate representation (IR)
  ↓ [apply proof invariants]
Verified IR (with theorem bounds)
  ↓ [Cranelift backend]
Machine code (x64 or ARM64)
  ↓ [seal with Ed25519]
Signed native code block
  ↓ [memory map + execute]
Runtime execution (proven correct)

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Integration Points

1. EmojiScript Compiler Hook

(defn compile-with-proof [source proof-certificate]
  "Compile EmojiScript to native code using proof certificate"
  (let [bytecode (emoji/compile-emojiscript source)
        validity (validate-proof-cert proof-certificate bytecode)]
    (if (:valid? validity)
      (jit-compile-cranelift bytecode proof-certificate)
      (throw (ex-info "Proof does not cover bytecode" validity)))))

2. MCP Tooling

New MCP tool: compile_with_proof

{
  "name": "compile_with_proof",
  "description": "Compile EmojiScript to native code with formal proof",
  "parameters": {
    "source": "EmojiScript source code",
    "proof_certificate": "Blake3 + Ed25519 signed proof (base64)",
    "target": "x86_64 or aarch64"
  },
  "returns": {
    "native_code": "Cranelift-generated machine code (base64)",
    "proof_id": "Lean theorem ID used (T01-T11)",
    "performance_estimate": "estimated execution time (ns)"
  }
}

3. WORM Ledger Sealing

Every JIT compilation requires WORM entry:

Event struct:
  - timestamp: u64
  - source_hash: Blake3(bytecode)
  - proof_id: u32
  - native_code_hash: Blake3(machine code)
  - actor_signature: Ed25519
  - status: "compiled" | "verified" | "executed"

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Proof Invariants Enforced by JIT

T01: Step Determinism

• Native code generation is deterministic
• Same bytecode → identical machine code
• Verified: Blake3 hash before/after compilation must match

T04: State Preservation

• Every native instruction preserves machine state validity
• Stack bounds checked at entry + exit
• Heap invariants maintained throughout execution

T08: Mutation Journal Completeness

• Every mutation recorded to WORM before commit
• Generation counter verified at boundary
• Rollback points marked in machine code

T10: Rollback Soundness

• Native code includes rollback jump targets
• State snapshots at generation boundaries
• Recovery code verified by proof certificate

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Implementation Roadmap

Phase 3D-1: Proof Certificate Format (2h)

• Define binary proof certificate struct (20 lines)
• Blake3 + Ed25519 signing/verification (30 lines)
• Serialization → base64 for MCP transport (15 lines)

Artifacts:

• Skclisp/ProofCertificate.lean (65 lines)
• skclisp_proof_certificate.ts (Node.js bindings, 40 lines)

Phase 3D-2: Cranelift Backend Wiring (4h)

• Cranelift dependency integration (10 lines package.json)
• EmojiScript → Cranelift IR translation (80 lines)
• x86_64 + aarch64 target support (50 lines)

Artifacts:

• native/cranelift-backend.rs (150 lines)
• src/snapkitty/lisp/jit.cljs (120 lines)

Phase 3D-3: Proof Invariant Enforcement (3h)

• T01-T04 checks compiled into native code (40 lines)
• T08-T10 mutation/rollback instrumentation (30 lines)
• Performance profiling + optimization (20 lines)

Artifacts:

• native/jit-verification.rs (90 lines)
• Test suite + benchmarks (50 lines)

Phase 3D-4: WORM Integration (2h)

• Ledger entry generation after compilation (25 lines)
• Proof certificate → WORM link (15 lines)
• Rollback coordination (20 lines)

Artifacts:

• src/snapkitty/lisp/jit-ledger.cljs (60 lines)
• Integration tests (30 lines)

Total Phase 3D: ~11 hours, 645 lines code + tests

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Security Model

Proof-of-Correctness Execution

1. Proof Certificate → Blake3-signed theorem ID
2. Bytecode → Compile to IR
3. Invariant Check → Does proof cover all ops?
4. Code Generation → Cranelift → native
5. Sealing → Ed25519 sign machine code
6. Execution → Verified native code only

Threat model: If the proof certificate matches the WORM record, we execute knowing:

• Lean theorem verified the operation semantics
• Machine state invariants are enforced
• No mutation occurs without logging
• Rollback points are reachable

Attack Surface

Protected:

• ✅ Proof substitution (Ed25519 signature)
• ✅ Bytecode modification (Blake3 check before compile)
• ✅ Code injection (proof certificate required for JIT)
• ✅ State corruption (T04 preservation enforced)

Assumptions:

• ❌ Proof certificate is honest (must be from trusted Lean verifier)
• ❌ Cranelift is bug-free (compiler bugs will pass through)
• ❌ Private keys are not compromised (Ed25519 verification only)

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Performance Target

Operation	Baseline	With JIT
Compile bytecode	2.5µs	15µs (compile phase)
Execute (interpreted)	500ns/op	—
Execute (native)	—	50ns/op (10x faster)
Proof verification	—	1.2µs
WORM ledger seal	2.1µs	2.1µs (unchanged)

Breakeven: ~300 operations before native execution pays off.

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Next Phase (Phase 4: Production Hardening)

• Distributed JIT compilation (load balancing across 200 repos)
• Hardware acceleration profiles (AVX-512, SVE for ARM)
• Proof certificate caching + precompilation
• End-to-end benchmarking (proof→code→execution)

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Built by: Jessica (SnapKittyWest) + Claude Code
Theorem Foundation: Lean 4 M02-M03 (Coq-equivalent)
Runtime: Cranelift IR → x86_64/aarch64 native
Security: Ed25519 proof certificates + Blake3 validation
Status: ARCHITECTURE COMPLETE, READY FOR PHASE 3D-1