docs/persistence-catalog/log-events.md enumerates every SessionEventMap member — the owning dsh-session vocabulary plus the dsh-compact and dsh-hook-protocol declaration merges — with payload, surface/log-only badge, JSDoc prose, and declaration site. scripts/gen-persistence-catalog.ts is a pure AST pass in the gen-cordis-catalog mold: verify-persistence-catalog (--check) joins doc-sync, so a stale committed catalog fails pre-push and CI. The walk enforces JSDoc completeness (every member needs description prose; @mode is rejected as a category error — log events do not dispatch on the cordis bus), derives the surface badge from the SurfaceEventType union with a stale-member cross-check, and hard-errors on duplicate declarations. Payloads render through the TypeScript printer so newline-separated multi-line type literals still emit valid one-line fragments. Documented the five previously JSDoc-less core events (turn/step boundaries, tool/call), removed the two stray @mode tags on the hook/* merges, and replaced the hand-restated event enumerations (session.md hook/* table, compact README table, hook-protocol README bullets, session README name-list — whose merge note had already drifted) with links to the catalog. RFC: docs/rfc/implemented/process/2026-07-04-persistence-log-catalog.md.
core/ — product API spine
The packages every harness build is assembled from: the session log, the system-prompt assembly, the tool registry, the agent vocabulary, and the one concrete loop that drives them. These are product packages — the stable surface plugins and consumers build against.
| Package | Role | ctx key |
|---|---|---|
session/ |
Event-sourced session log + in-memory store | ctx.sessions |
system-prompt/ |
Prompt-section + tool-schema assembly registry | ctx.systemPrompt |
tools/ |
Tool registry + tools/pre-execute/tools/post-execute pipeline |
ctx.tools |
agent/ |
Agent interface, registry, agent/* event vocabulary |
ctx.agents |
agent-loop/ |
The concrete loop plugin: ReactLoopAgent + the loop driver |
ctx.agentLoop |
agent-core/ |
Bundle plugin: the providerless/executor-less/UI-less spine as code | (loads the spine) |
agent-loop is the one concrete implementation of the agent seam and lives here because it is the harness's default product loop; everything else in core/ is interface/vocabulary. Plugins depend on the agent vocabulary, never on agent-loop directly, so the loop stays swappable.
agent-core is the composition counterpart: one bundle plugin that loads the whole providerless spine (timer + llm + sessions + system-prompt + tools + agents + invariants + tool-bash + agent-loop) and forwards agent-loop's agents list as its own config. App packages (ui/stdio-agent, ui/acp-agent) consume it and add only a front door; a leaf adds the swappable backends plus any optional product tools it wants to expose. It lives in core/ because it composes exclusively core/ + interface packages and ships no provider, executor, or UI of its own.