Tianyi Cui
a4f7e757fa
deriveMessages() no longer re-derives and re-clones the whole surface per call: each node is projected exactly once, when first seen (O(new nodes) per access), through the now-public deriveEventMessage — the per-node pure function external reconstructors and the dev invariant fold over a log prefix, so no two paths can disagree about a request's messages. A surface rewrite (replace, invalidate) rebuilds, signalled by SurfaceManager.replaceGeneration — monotonic, bumped by every folded replace and by invalidate(), never reset. Callers get a fresh array snapshot per call over SHARED deep-frozen messages: isolation of the append-only log moves from per-call cloning to unrepresentability (mutation throws), which the two isolation tests now pin directly.
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.