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013f12963b
Codex follow-up findings on the carrier commit, both verified: B: the invariant guard only protected the bind path — an overlay key colliding with a non-configurable, non-writable OWN prop of a (pathological) base would have the get trap report the overlay value, which the engine rejects as a proxy invariant violation (TypeError at read time). The pin check now runs FIRST and covers both invariant-pinned shapes (non-writable own data prop reported as-is; getterless non-configurable accessor reported undefined via the delegated read) before overlay and bind alike. Such a base forgoes scope filtering by construction — correctness of the read beats filtering for a base no production code ships. C: `constructor` is looked up for identity, never invoked as a subject method — binding it broke `carrier.constructor === Subject` for no benefit; it now returns raw (the same special-case withProps had). Both pinned in scope.spec: the frozen-own-filter collision yields the base's value without throwing, and class identity survives the carrier.
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.