27012ce4dd2a65da94a96a5bce5d098f8ee9058b
The deliverable is plan mode — retitle and reorder the proposal opener so the feature leads and the logged session-mode state is its implementation property. Fix the Codex citation in the boolean-planMode alternative: Codex has plan mode (/plan); its ACP mode list carries its approval presets — two different surfaces. Durable vocabulary (mode/set, ctx.modes, dsh-mode) stays string-shaped so a second mode never renames logged event types.
DeepSeek Harness
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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.
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