Tianyi Cui
22e9152d8b
After turn/start was appended, nothing guaranteed a matching turn/end: a throw from a boundary emit (agent/turn-start, agent/step-start, the normal-path agent/turn-end) escaped runTurn, and the outer runLoop backstop logged an error but never appended turn/end — leaving an unbalanced turn that replay, telemetry, and the invariants plugin all assume is impossible. runTurn is restructured around idempotent finalizers that satisfy the four traps a naive finally would hit: - closeStep()/closeTurn(emit) are guarded (stepOpen/turnEnded) so they run at most once; the agent/step-end and agent/error emits are contained so a throwing listener can't strand the turn open. - failTurn() records the single error event + reason and emits agent/error exactly once (errorReported guard) — no double-logging when the outer catch also runs (e.g. a step error followed by a throwing turn-end listener). - the catch closes an open step BEFORE turn/end (invariants reject turn/end while a step is open), and rethrows ONLY pre-turn throws (turnStarted false), where no turn/end is owed, so the backstop still nets them. - disposal precedence: reason stays disposed only when disposed AND no error was reported; otherwise the error reason wins. Tests (with the invariants plugin loaded as a balance oracle): throwing turn-start (one error, one turn/end, no step), throwing step-start (step/end before turn/end), throwing agent/error on a step-error path (balanced, loop survives), disposal mid-turn (reason disposed, no error event), a pre-turn turn/start-append throw (rethrown to the backstop, no turn/end owed), and a step error + throwing turn-end listener (error logged exactly once). Verified all six fail against a simulated finalizer bypass. dsh-invariants added as an agent-loop devDependency (test-only oracle; no package cycle).
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.
yarn install
yarn test # vitest
yarn demo:echo # runnable echo-agent example (no API key needed)
yarn 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.