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Pin the three-domain rule (session = durable fact log, agent = live runtime surface, tools = registry/exec): a durable replayable fact is a SessionEvent; a live interception or transient/live-object signal is an agent/tools Cordis event. A boundary that is both is mirrored as an agent/* emit ONLY where a live consumer needs the Agent handle. Apply it to the boundary twins: drop agent/step-start and agent/step-end (no production consumer needs the live Agent at a step boundary — consumers read the durable step/start/step/end session events). Keep agent/turn-start/turn-end (the stdio UI labels output by agent.id). Tests that observed step boundaries via the removed emits now observe the durable session events; the pinned behavior is unchanged. Conservative subset of the proposed "remove boundary mirror events" simplification; foundation for the Hooks subsystem's canonical event surface.
DeepSeek Harness
Monorepo for the DeepSeek Harness group.
Projects
- DeepSeek Code — DeepSeek's coding agent product.
Development
This monorepo is built on the Cordis framework (vendored as source under vendor/), microkernel-style: everything is a plugin.
pnpm install
pnpm run test # vitest
pnpm run demo:echo # runnable echo-agent example (no API key needed)
pnpm run demo:coding # the real DeepSeek coding agent (needs DEEPSEEK_API_KEY)
For humans, start with the development guide for local setup, hooks, environment variables, and quality gates, then read the architecture design before package work. Local context lives in packages/ and vendor/.
For agents, follow AGENTS.md.