deepseek-harness/packages/subprocess/README.md

subprocess/ — subprocess capability family

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The shared process substrate for one execution world: executable lookup, fully-specified managed child-process trees with raw or collected stdio, and one deep terminal-process primitive that owns PTY allocation, foreground groups, and provider-observable session cleanup. Command defaulting, shell semantics, deadlines, protocol framing, readiness, and presentation stay with consumers — the bash executors, LSP host, PTY shell backend, and ACP subagent backend. See the subprocess seam Agent Note.

Package	ctx key	Role
subprocess (@deepseek-ai/dsh-subprocess)	ctx.subprocess	The seam: executable lookup, ordinary managed spawns, the terminal-process primitive, handle lifecycles, and shared environment/output vocabulary
subprocess-local (@deepseek-ai/dsh-subprocess-local)	—	The local implementation: detached process trees, bounded collection/spill, node-pty, foreground/session inspection, tree signalling, and terminate-and-join disposal

The service owns process lifetime across consumer reloads; consumers own what a process means (a bash command, a future non-shell runner) and every default that shapes one.