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# Conflicts: # docs/agent-lifecycle.md # docs/architecture.md # docs/cookbook/extension-cookbook.i18n.yaml # docs/cordis-catalog/events.md # docs/cordis-catalog/services.md # docs/event-producer-consumer.md # docs/rfc/INDEX.md # docs/rfc/implemented/architecture/2026-07-05-reconstructable-requests.md # docs/rfc/implemented/architecture/2026-07-15-replay-token-meter-service.i18n.yaml # docs/rfc/implemented/architecture/2026-07-15-replay-token-meter-service.md # docs/rfc/implemented/architecture/2026-07-15-replay-token-meter-service.zh.md # docs/rfc/implemented/feature/2026-06-18-compaction-capability-seam.md # docs/rfc/implemented/feature/2026-07-07-session-prefix.md # packages/compact/compact-basic/README.md # packages/compact/compact-basic/src/config.ts # packages/compact/compact-basic/src/index.ts # packages/compact/compact-basic/src/summarizer.ts # packages/compact/compact-basic/tests/compact-basic.spec.ts # packages/compact/compact-basic/tests/compact-loop-repro.spec.ts # packages/compact/compact/README.md # packages/cordis/tool-cordis/src/api-catalog.ts # packages/core/agent-loop/src/loop.ts # packages/core/agent-loop/tests/cancel.spec.ts # packages/llm/llm-deepseek/src/adapter.ts # packages/llm/llm-pi-ai/README.md # packages/llm/llm-pi-ai/src/stream.ts # packages/llm/llm-pi-ai/tests/convert.spec.ts # packages/llm/llm/README.md # packages/llm/llm/src/index.ts # packages/llm/llm/tests/service.spec.ts # scripts/gen-doc-graphs.ts
core/ — product API spine
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 (scope tags, scope-filtered dispatch) | (library — no ctx key) |
session/ |
Event-sourced session log + in-memory store | ctx.sessions |
system-prompt/ |
Prompt-section + tool-schema assembly registry | ctx.systemPrompt |
tools/ |
Scoped tool registry + pre-policy, guards, around-dispatch, post-policy, and final-result observation | ctx.tools |
agent/ |
Agent interface, registry, agent/* event vocabulary |
ctx.agents |
agent-loop/ |
Concrete plugin implementing the public Agent contract and owning the loop driver |
ctx.agentLoop |
scope/ is the one non-service package here: a dependency-free library (createScope/scopeOf/scopeTarget) the registries and the loop build per-agent scoping on — it sits below session/ and system-prompt/ in the module graph precisely so they can consume it without a cycle.
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.
The default composition that wires this spine into a runnable agent lives in examples/agent-spine-demo: one bundle plugin that loads the control spine plus selected default capabilities (timer + llm + sessions + system-prompt + tools + agents + invariants + the local skill family + tool-bash + workspace-context + agent-loop) and forwards agent-loop's agents list as its own config. It sits in examples/ — ready-to-run demo/reference bundles — not in core/: core/ ships the swappable spine pieces, while a demo bundle picks one concrete composition of them and adds a front door.