Cross-Runtime Syrup Exchange Skill

Cross-Runtime Syrup Exchange Skill

Overview

This skill enables content-addressed interoperability between three Syrup implementations:

• Clojure (Babashka) - syrup.clj
• Rust - ocapn-syrup crate
• Zig - zig-syrup

All three produce identical CIDs for the same data structures, enabling trustless cross-runtime communication.

Canonical CID

06fe1dc709bea744f8a0e1cd767210cd90f2b78200f574497e876c2778fa7ffb

This CID represents a skill invocation that is identical across all runtimes:

<12"skill:invoke[7'gay-mcp7'palette{1"n4+4"seed1069+}0+]>

Usage

Run Cross-Runtime Verification

# Zig
zig build cross-runtime

# Or run the example directly
zig run examples/​cross_runtime_exchange.zig

Expected Output

╔══════════════════════════════════════════════════════════════════╗
║     Zig (zig-syrup) Cross-Runtime Exchange                        ║
╚══════════════════════════════════════════════════════════════════╝

=== Zig Encoding & CID Computation ===

skill-invocation     CID: 06fe1dc7...78fa7ffb [57 bytes]
                     ✓ MATCHES CANONICAL CID

=== Cross-Runtime Compatibility ===

All CIDs match between:
  • Clojure (Babashka) - syrup.clj
  • Rust - ocapn-syrup crate
  • Zig - zig-syrup

Canonical skill:invoke CID:
  06fe1dc709bea744f8a0e1cd767210cd90f2b78200f574497e876c2778fa7ffb

Key Compatibility Rules

1. Record labels must be Strings (not Symbols)

   • ✅ "skill:invoke" (string)
   • ❌ 'skill:invoke (symbol)

2. Record fields must be wrapped in a Sequence/​List

   • ✅ [7'gay-mcp7'palette{...}0+] (list)
   • ❌ 7'gay-mcp7'palette{...}0+ (bare)

3. Dictionary keys must be Strings for canonical ordering

   • ✅ {"n" 4 "seed" 1069} (string keys)
   • ❌ {n 4 seed 1069} (symbol keys)

Cross-Runtime Use Cases

1. Content-Addressed Skill Invocation

Client (Clojure) → Router (Rust) → Worker (Zig)
     │                  │               │
     └──── Same CID ────┴───────┬───────┘
                                ↓
                    Content-Addressed Cache

2. Embedded-to-Cloud Communication

Sensor Device (Zig) → Gateway (Rust) → Analytics (Clojure)
        │                  │                  │
        └────── Same CID representing sensor reading ──────┘

3. Trustless Data Verification

Producer signs CID → Network transmits bytes → Consumer verifies CID
       │                                            │
       └──────────── Cryptographic guarantee ───────┘

Files

• examples/​cross_runtime_exchange.zig - Zig implementation
• examples/​cross_runtime_exchange.rs - Rust implementation
• syrup_cross_runtime_exchange.clj - Clojure implementation
• SYRUP_CROSS_RUNTIME_EXCHANGE.md - Full documentation

Related Skills

• bandwidth-benchmark - Measure throughput across runtimes