deepseek-harness/packages/pty

pty/ — persistent PTY capability family

PTY stands for Pseudo-Terminal（伪终端）. This capability provides persistent, owner-scoped terminal sessions for workflows that require state across tool calls or interactive stdin. PTY complements the one-shot bash and filesystem tools; it does not replace their stronger per-operation contracts.

Package	Role	ctx key
pty (@deepseek-ai/dsh-pty)	Backend registry, branded ids, exact-Agent ownership, session operations, and awaited cleanup	ctx.pty
pty-local (@deepseek-ai/dsh-pty-local)	Local node-pty backend, readiness detection, bounded terminal state, sandboxing, and process-session supervision	registers on ctx.pty
tool-pty (@deepseek-ai/dsh-tool-pty)	Six model-facing tools and generic task integration for background sends	registers on ctx.tools

The design and deferred boundaries live in the persistent PTY Agent Note.