0.15.2

Added

• Produce-level tracing (AgentSpan.produces). A trace span now records
  which Produce(s) ran within the agent for that event, with how many effect
  operations each authored and its latency — so a multi-produce agent (e.g. one
  that shapes an answer and records a side effect) is no longer a black box in
  the trace. Captured via a per-task contextvar in Agent.execute, persisted in
  the SQLite/Postgres trace stores (auto-migrated column) and shown in the
  dashboard as a Consume → Produce flow on each span (trigger artifact →
  produce chips with +N authored operations, no-op produces dimmed); the
  agent header aggregates it. The external sinks carry it too: LangfuseTracer
  emits a child observation per produce (with its latency, so Langfuse's
  waterfall shows each Consume → Produce step) plus the
  langfuse.observation.metadata.produces list, and OTLPTracer emits a
  reactifact.produces attribute (Name(ops) list). A produce that raises is
  still recorded — with its partial operations — on the error span, so the
  failing step is visible instead of silently missing. Produce names are readable:
  Produce.name uses the class name, the @produce function's name, or — for a
  bare Produce(Model) used only to widen an agent's allowed Create types —
  Produce[Model] (an explicit name= still wins), so traces no longer show a
  wall of generic Produce.
• AgentSpan.event_artifact_type — the artifact type whose change triggered
  the agent (its matched Consume), e.g. DraftAnswer vs FinalResponse for an
  agent that consumes both. event_type alone (created/updated) can't tell them
  apart. Persisted in both trace stores (auto-migrated) and shown on each span;
  Langfuse gets langfuse.observation.metadata.event_artifact_type and OTLP gets
  reactifact.event_artifact_type (both omitted when empty, so no blank key).

Fixed

• Dashboard disclosure carets now point down when expanded. The ▸ on
  agent, span and LLM-call rows was styled with details[open]>.caret, but the
  caret lives inside <summary>, so the selector never matched and it stayed
  ▸; it now rotates to ▾ for every expanded row.

Full changelog: https://github.com/bzdvdn/reactifact/blob/v0.15.2/CHANGELOG.md