v0.3.4

Summary

• Per-service runtime.json context propagation — replaces individual EXGENTIC_* env vars with a single runtime.json per service. Each agent/benchmark session bootstraps context, settings, and OTEL trace IDs from disk. Eliminates env var leakage and race conditions in parallel workers.
• Session/Evaluator separation — Sessions self-load their own task data given just task_id. Evaluator exists only for run-level aggregation (list_tasks + aggregate_sessions). Removes N redundant evaluator spawns per run.
• Per-session otel_spans.jsonl — when OTEL is enabled, each session automatically gets a local JSONL file with all spans (session lifecycle, tool executions, LLM calls). No Jaeger or collector required.
• Env var allowlist — subprocess runners now forward only model-provider credentials and OTEL config (~3 vars) instead of the entire host environment (~45 vars).
• Shared retriever for BrowseCompPlus — auto-enabled for venv/process/docker runners so sessions don't each load the 612MB search model.
• Health check cache bypass — model accessibility check now skips LiteLLM cache to verify real connectivity.

Notes

• EXGENTIC_OTEL_ENABLED=true now works standalone for local file export without a running collector. Set OTEL_EXPORTER_OTLP_ENDPOINT to also send to Jaeger/Tempo.
• settings.cache_dir default changed from .exgentic (CWD-relative) to ~/.exgentic (home-relative), matching EnvironmentManager.
• Removed APIs: context_env, init_context_from_env, agent_scope, benchmark_scope, Context.to_env, Evaluator.get_session_kwargs. These were internal and replaced by runtime.json propagation.
• New Role.AGGREGATOR for run-level evaluator services (path isolation from session-level Role.BENCHMARK).