v0.1.0 — First public release

LDP v0.1.0

First public release of the LLM Delegate Protocol.

Python SDK (pip install ldp-protocol)

• Protocol types — Pydantic models for all LDP types (identity cards, capabilities, sessions, messages, provenance, trust domains, payload modes)
• LdpClient — Async HTTP client with discovery, session management, and task submission
• LdpDelegate — Base class for building delegates with optional Starlette server
• LdpRouter — Multi-strategy routing (quality, cost, latency, balanced) with trust domain filtering
• 29 tests passing

Rust reference implementation

• Standalone protocol abstractions — ProtocolAdapter trait, ProtocolRegistry, and 9 standalone types (no external runtime dependency)
• LdpAdapter — Full lifecycle: discover, invoke, stream, status, cancel
• Session management — Transparent session establishment, reuse, and expiration
• Optional JamJet integration — enable with features = ["jamjet"] for native runtime integration
• 17 tests passing (10 unit + 7 integration)

Protocol features

• Rich delegate identity cards (model family, quality scores, reasoning profiles, cost/latency hints)
• Progressive payload modes 0-1 (Text + Semantic Frame, 37% token reduction)
• Governed sessions with payload mode negotiation
• Structured provenance on every response
• Trust domain enforcement (Rule #1)
• 12 message types (HELLO through SESSION_CLOSE)

Links

• PyPI: https://pypi.org/project/ldp-protocol/0.1.0/
• Website: https://ldp.sunilprakash.com
• Paper: https://arxiv.org/abs/2603.08852