v0.1.6

Added

• OpenAI Assistants API adapter: instrument_openai_assistant(client) — monkey-patches create_and_poll to automatically verify assistant responses against file_search citations.
• CrewAI adapter: instrument_crewai(crew) — wraps kickoff() to verify each task's output against its context sources. Also provides verify_crew_output() for standalone use.
• AutoGen adapter: instrument_autogen(agent) — wraps AutoGen ≥0.4 AssistantAgent.on_messages for automatic response verification. Also provides verify_autogen_result() for standalone use.
• REST API server (longtracer serve): FastAPI-based HTTP server exposing verification as REST endpoints.
  • POST /api/v1/verify — verify a single response.
  • POST /api/v1/verify/batch — verify multiple responses in one call.
  • GET /api/v1/health — health check (no auth required).
  • GET /api/v1/traces — list recent traces.
  • GET /api/v1/traces/{trace_id} — get a specific trace.
  • API key authentication via x-api-key header (LangSmith-standard) with Authorization: Bearer fallback.
  • Timing-safe key comparison via secrets.compare_digest.
  • CORS middleware with configurable origins (LONGTRACER_CORS_ORIGINS).
  • Token bucket rate limiter (60 req/min per IP, configurable via LONGTRACER_RATE_LIMIT).
  • Pydantic input validation with max-length and max-items constraints.
• Webhook support: HMAC-SHA256 signed HTTP POST dispatch with 5 retries + exponential backoff + jitter (Stripe-style).
  • Configurable via env vars (LONGTRACER_WEBHOOK_URL, LONGTRACER_WEBHOOK_SECRET) or [tool.longtracer] in pyproject.toml.
  • Async dispatch in background thread — never blocks the verification pipeline.
  • Dead-letter logging after max retries.
  • dispatch_webhook() and dispatch_verification_result() public APIs.
• Webhook config keys added to [tool.longtracer]: webhook_url, webhook_secret, webhook_events, webhook_timeout.
• Optional dependency groups: openai, crewai, autogen, server.

Changed

• Version bumped to 0.1.6.
• [project.optional-dependencies] all extra now includes openai, crewai, autogen, server.
• longtracer.adapters.__init__ now lazily exports all 7 adapter modules.