Address review feedback on PR #1738: - ReactLoopAgent builds its AgentEventDispatch once in the constructor and routes every emit/serial/waterfall through it, so hot-path dispatches no longer allocate a carrier and dispatcher per call; the public carrier field is gone (fused dispatcher is private). - agentEvents accepts an optional prebuilt carrier. - The fused payload builder spreads the payload before the injected agent so a structurally acceptable payload carrying an agent field can never override the subject. - Regenerate doc graphs; re-record core + architecture + affected Agent Note translation pairs; add payload-object event contract Agent Note.
core/ — product API spine
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The session log, system-prompt assembly, tool registry, agent vocabulary, and concrete loop that form the harness's default control spine. These are product packages — the stable surface plugins and consumers build against.
| Package | Role | ctx key |
|---|---|---|
scope/ |
Scoped-context registration primitive | library — no ctx key |
session/ |
Event-sourced session log and in-memory store | ctx.sessions |
system-prompt/ |
Prompt and tool-schema assembly registry | ctx.systemPrompt |
tools/ |
Scoped tool registry and execution pipeline | ctx.tools |
agent/ |
Agent interface, registry, and event vocabulary | ctx.agents |
agent-loop/ |
Default concrete agent driver | ctx.agentLoop |
scope supplies the shared scoping primitive. agent owns the public seam, while agent-loop is its default implementation; extension plugins depend on the seam so the driver remains swappable.
Runnable compositions belong to examples/agent-spine-demo; this group owns only the swappable spine pieces.