Tianyi Cui
b3d40d427e
A fork subagent seeds its child session with a prefix of the parent's log, and that seed becomes the child's persisted log — so a fork child's .jsonl begins with the PARENT's events, including the parent's assistant/chunk events. The snapshot replay harness derived a child's script from its whole log, which would replay the parent's recorded responses as the child's model calls. Spawn-only scenarios never hit it, but a fork snapshot would mis-route silently. Record the seed boundary and skip the inherited prefix at replay: - SessionHeader gains an optional `seedLength` (how many leading events were inherited via a seed), threaded through CreateSessionOptions/CreateAgentOptions meta and stamped by the fork backend (= seeded-prefix length; absent for spawn). It is EXPLICIT, never inferred from seed.length: a resume seeds the whole stored log, so the resume path passes the persisted boundary back. - Both persistence backends round-trip it: JSONL header line, SQLite seed_length column. The SQLite table change bumps SCHEMA_VERSION 2->3; per the pre-release stance the backend rejects an older user_version on open with NO migration. - llm-replay's parseSessionHeader reads seedLength and loadSessionScripts derives a child script from events AFTER the boundary. seedLength is 0 for spawn, so spawn replay is byte-for-byte unchanged. Closes the routing-correctness gap the per-session snapshot replay RFC under- stated; a recorded fork scenario remains a future addition but now derives correctly. RFC: docs/rfc/implemented/testing/2026-06-22-fork-child-replay-seed-boundary.md. Regression coverage: a fork child fixture whose seeded prefix carries a parent chunk (derived script must exclude it, proven red without the slice); a seedLength persistence round-trip through the shared coordinator contract (both backends); the fork backend stamping it; resume preserving it from the persisted header.
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.
pnpm install
pnpm run test # vitest
pnpm run demo:echo # runnable echo-agent example (no API key needed)
pnpm run 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.