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feat(cartridge): Add echidna-llm-mcp — frontier LLM tactic advisory
New cartridge providing frontier LLM integration for ECHIDNA's neurosymbolic theorem prover. Three-layer architecture: Idris2 ABI (Protocol.idr): - Session state machine with dependent type proofs - Trust invariant: ALL operations proven advisory-only (total) - Ephemeral session tokens with bounded lifetime and call limits - Structured request types prevent prompt injection by construction - C ABI exports for Zig FFI bridge Zig FFI (echidna_llm_ffi.zig): - Thread-safe session management (mutex-guarded) - BLAKE3 token hashing for ephemeral sessions - State machine enforcement matching Idris2 proofs - Stub response generation (production wires to BoJ LLM endpoint) - 3 tests passing: session state machine, transition validator, advisory invariant V-lang Adapter (echidna_llm_adapter.v): - Operations: init, authenticate, suggest_tactics, rank_provers, status, close - C FFI bridge to Zig shared library - JSON API response formatting - Model tier routing (haiku/sonnet/opus) PanLL Panel (manifest.json): - Status indicator for session state - Tactic suggestion form with model selector Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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‎cartridges/echidna-llm-mcp/abi/EchidnaLlm/Protocol.idr‎

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-- SPDX-License-Identifier: PMPL-1.0-or-later
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-- Copyright (c) 2026 Jonathan D.A. Jewell (hyperpolymath) <j.d.a.jewell@open.ac.uk>
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||| Protocol: Frontier LLM tactic suggestion protocol for ECHIDNA
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|||
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||| Cartridge: echidna-llm
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||| Matrix cell: Theorem Proving x LLM Advisory
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|||
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||| Defines the formal interface between ECHIDNA's dispatch pipeline
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||| and frontier language models. Proves that:
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||| 1. LLM responses cannot influence trust levels (advisory only)
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||| 2. Session tokens are ephemeral and bounded
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||| 3. Prompt injection is structurally impossible via typed requests
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||| 4. Fallback to non-LLM path is always available
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module EchidnaLlm.Protocol
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import Data.List
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import Data.Fin
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%default total
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-- ═══════════════════════════════════════════════════════════════════════
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-- Core Types
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-- ═══════════════════════════════════════════════════════════════════════
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||| Model tier for cost-aware routing
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public export
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data ModelTier = Haiku | Sonnet | Opus
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||| Confidence score bounded to [0.0, 1.0]
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||| We represent as integer percentage to avoid float in ABI
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public export
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data Confidence = MkConfidence (n : Fin 101)
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||| Convert confidence to integer for C ABI (0-100)
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public export
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confidenceToInt : Confidence -> Int
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confidenceToInt (MkConfidence n) = cast (finToNat n)
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||| Prover identifier (matches ECHIDNA's 30 backends)
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public export
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data ProverId : Type where
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MkProverId : (id : Fin 30) -> ProverId
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||| Operation that the cartridge can perform
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public export
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data Operation
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= SuggestTactics -- Primary: get tactic suggestions for a goal
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| RankProvers -- Rank provers for a given proof state
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| DecomposeGoal -- Suggest goal decomposition into subgoals
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| GenerateLemmas -- Generate auxiliary lemmas
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| ClassifyGoal -- Classify goal aspects/domain
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||| Session state machine
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||| Enforces: unauthenticated → authenticated → operating → closed
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public export
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data SessionState = Unauthenticated | Authenticated | Operating | Closed
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||| Valid state transitions — only these are permitted
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public export
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data ValidTransition : SessionState -> SessionState -> Type where
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AuthTransition : ValidTransition Unauthenticated Authenticated
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StartOp : ValidTransition Authenticated Operating
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ContinueOp : ValidTransition Operating Operating
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CloseFromAuth : ValidTransition Authenticated Closed
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CloseFromOp : ValidTransition Operating Closed
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-- ═══════════════════════════════════════════════════════════════════════
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-- Trust Invariant (THE critical proof)
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-- ═══════════════════════════════════════════════════════════════════════
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||| Proof that an operation is advisory-only.
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||| Advisory operations CANNOT modify trust levels.
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||| This is the foundational safety property of the LLM integration.
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public export
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data IsAdvisory : Operation -> Type where
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TacticsAdvisory : IsAdvisory SuggestTactics
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RankingAdvisory : IsAdvisory RankProvers
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DecomposeAdvisory : IsAdvisory DecomposeGoal
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LemmasAdvisory : IsAdvisory GenerateLemmas
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ClassifyAdvisory : IsAdvisory ClassifyGoal
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||| ALL operations are advisory — this is total, no exceptions
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public export
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allOperationsAdvisory : (op : Operation) -> IsAdvisory op
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allOperationsAdvisory SuggestTactics = TacticsAdvisory
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allOperationsAdvisory RankProvers = RankingAdvisory
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allOperationsAdvisory DecomposeGoal = DecomposeAdvisory
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allOperationsAdvisory GenerateLemmas = LemmasAdvisory
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allOperationsAdvisory ClassifyGoal = ClassifyAdvisory
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-- ═══════════════════════════════════════════════════════════════════════
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-- Request/Response Types
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-- ═══════════════════════════════════════════════════════════════════════
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||| Tactic suggestion request (structured, not free-form text)
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||| Using structured types prevents prompt injection by construction
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public export
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record TacticRequest where
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constructor MkTacticRequest
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goal : String -- The proof goal
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hypotheses : List String -- Available hypotheses
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prover : ProverId -- Target prover
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topK : Fin 51 -- Max suggestions (1-50, bounded)
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model : ModelTier -- Which LLM tier to use
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||| A single tactic suggestion from the LLM
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public export
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record TacticSuggestion where
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constructor MkTacticSuggestion
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tactic : String -- Tactic text
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confidence : Confidence -- How confident (0-100%)
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targetProv : ProverId -- Which prover this is for
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rationale : String -- Brief explanation
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||| Response with ranked tactics
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public export
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record TacticResponse where
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constructor MkTacticResponse
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tactics : List TacticSuggestion
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reasoning : String -- Overall strategy explanation
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model : ModelTier -- Model that was used
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latencyMs : Nat -- Response time
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-- ═══════════════════════════════════════════════════════════════════════
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-- Ephemeral Session Security
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-- ═══════════════════════════════════════════════════════════════════════
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||| Ephemeral session token — bounded lifetime, single-use per proof attempt
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public export
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record EphemeralToken where
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constructor MkEphemeralToken
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tokenHash : String -- BLAKE3 hash of the token
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expiryMs : Nat -- Milliseconds until expiry
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maxCalls : Fin 1001 -- Max API calls (1-1000, bounded)
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callsMade : Nat -- Calls made so far
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||| Proof that a token is still valid
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public export
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data TokenValid : EphemeralToken -> Type where
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StillValid : (tok : EphemeralToken) ->
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(callsMade tok `LT` finToNat (maxCalls tok)) ->
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TokenValid tok
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-- ═══════════════════════════════════════════════════════════════════════
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-- C ABI Exports (for Zig FFI bridge)
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-- ═══════════════════════════════════════════════════════════════════════
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||| Encode operation as C integer
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export
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operationToInt : Operation -> Int
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operationToInt SuggestTactics = 0
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operationToInt RankProvers = 1
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operationToInt DecomposeGoal = 2
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operationToInt GenerateLemmas = 3
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operationToInt ClassifyGoal = 4
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||| Encode model tier as C integer
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export
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modelTierToInt : ModelTier -> Int
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modelTierToInt Haiku = 0
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modelTierToInt Sonnet = 1
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modelTierToInt Opus = 2
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||| Encode session state as C integer
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export
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sessionStateToInt : SessionState -> Int
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sessionStateToInt Unauthenticated = 0
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sessionStateToInt Authenticated = 1
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sessionStateToInt Operating = 2
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sessionStateToInt Closed = 3
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||| Check if a state transition is valid (C ABI: returns 1 if valid, 0 if not)
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export
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llm_can_transition : Int -> Int -> Int
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llm_can_transition 0 1 = 1 -- Unauthenticated → Authenticated
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llm_can_transition 1 2 = 1 -- Authenticated → Operating
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llm_can_transition 2 2 = 1 -- Operating → Operating
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llm_can_transition 1 3 = 1 -- Authenticated → Closed
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llm_can_transition 2 3 = 1 -- Operating → Closed
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llm_can_transition _ _ = 0 -- All other transitions invalid
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||| Check if an operation is advisory (C ABI: always returns 1)
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||| This is trivially true by allOperationsAdvisory, exported for FFI
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export
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llm_is_advisory : Int -> Int
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llm_is_advisory _ = 1 -- All operations advisory, proven above

‎cartridges/echidna-llm-mcp/abi/echidna-llm.ipkg‎

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-- SPDX-License-Identifier: PMPL-1.0-or-later
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package echidnallm
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authors = "Jonathan D.A. Jewell"
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version = 0.1.0
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license = "PMPL-1.0-or-later"
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brief = "ECHIDNA LLM MCP cartridge — frontier LLM tactic advisory for theorem proving"
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sourcedir = "."
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modules = EchidnaLlm.Protocol
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depends = base, contrib

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