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A client-callback throw only becomes a JSON-RPC error RESPONSE to the agent's session/request_permission — runScenario itself kept going, so a tolerant agent could treat the error as a denial and the scenario would pass, or worse, record: the impossible click baked into fixture and golden, green on every replay. The mismatch is now captured as a harness error while the agent is answered plain cancelled (a well-defined path it cannot reinterpret), and the step loop rejects the run on it as soon as the in-flight step settles. The spec asserts the rejection instead of the agent-side error echo.
DeepSeek Harness
English | 中文
The DeepSeek Harness SDK is a plugin-based SDK for building agent harnesses.
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:repl # REPL agent demo (needs DEEPSEEK_API_KEY)
pnpm run demo:acp # ACP server agent demo (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 and documentation graph index before package work. Local context lives in packages/ and vendor/.
For agents, follow AGENTS.md.