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refactor(code-runtime): remove subprocess backend

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Tianyi Cui
2026-07-30 14:24:47 +08:00
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docs/core-data-structures/subprocess.md
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English | [中文](subprocess.zh.md)
The subprocess seam is split across interface ([dsh-subprocess](../../packages/subprocess/subprocess), `ctx.subprocess`) and implementation ([dsh-subprocess-local](../../packages/subprocess/subprocess-local)); its consumers are other capability seams and out-of-process backends: the [bash executor family](bash.md) uses collected batch output, the LSP and Code Runtime hosts use raw protocol pipes, the PTY backend uses the terminal primitive, and the ACP subagent backend uses piped ndjson plus inherited stderr. This seam owns the managed `DSH_*` environment namespace, the shared credential scrub (`scrubbedParentEnv`), and the `CollectedOutput` shape; [dsh-bash](../../packages/bash/bash) re-exports the vocabulary so bash consumers keep one import root.
The subprocess seam is split across interface ([dsh-subprocess](../../packages/subprocess/subprocess), `ctx.subprocess`) and implementation ([dsh-subprocess-local](../../packages/subprocess/subprocess-local)); its consumers are other capability seams and out-of-process backends: the [bash executor family](bash.md) uses collected batch output, LSP uses raw protocol pipes, the PTY backend uses the terminal primitive, and the ACP subagent backend uses piped ndjson plus inherited stderr. This seam owns the managed `DSH_*` environment namespace, the shared credential scrub (`scrubbedParentEnv`), and the `CollectedOutput` shape; [dsh-bash](../../packages/bash/bash) re-exports the vocabulary so bash consumers keep one import root.
Source: [`packages/subprocess/subprocess/src/types.ts`](../../packages/subprocess/subprocess/src/types.ts) and [`packages/subprocess/subprocess/src/index.ts`](../../packages/subprocess/subprocess/src/index.ts)
## Execution-world coordinates
## Executable lookup
One provider's `cwd`, executable paths, ordinary processes, and terminal sessions inhabit the same path and process namespace as the mounted filesystem provider. `resolveExecutable(command, env?, signal?)` verifies absolute executable paths or resolves bare names through the provider's scrubbed `PATH` plus deliberate overrides.
One provider's spawn working directories, executable paths, ordinary processes, and terminal sessions inhabit the same path and process namespace as the mounted filesystem provider. `resolveExecutable(command, env?, signal?)` verifies absolute executable paths or resolves bare names through the provider's scrubbed `PATH` plus deliberate overrides.
## Managed environment namespace and captured output