refactor(subprocess): rename the process seam to subprocess and address review

Review feedback (tianyicui): 'process' is a poor service name. The family is
now packages/subprocess/ — @deepseek-ai/dsh-subprocess (ctx.subprocess,
abstract SubprocessService, Subprocess* vocabulary) and
@deepseek-ai/dsh-subprocess-local (LocalSubprocessService) — renamed
throughout code, compositions, docs (en+zh, pairs re-recorded), catalogs,
and gates. 'subprocess' is the precise term for managed OS children (the
Python-stdlib sense), avoids colliding with Node's global process object,
and reads as one system beside dsh-subagent-subprocess.

ds-review-bot findings addressed:
- kill() on a settled handle is now a no-op (no signal to a possibly-reused
  pgid, no referenced grace timer delaying exit); pinned by a spy test.
- The moved DshEnvironmentKey/DshEnvironment/CollectedOutput types get
  drift-checked type-equiv blocks on the new subprocess.md page, restoring
  their manifest registration.
- subprocess.md is registered in the core.md sub-page index (en+zh).

packages/bash/bash-sandbox/package.json

@@ -38,7 +38,7 @@
     "@deepseek-ai/dsh-bash": "workspace:^",
     "@deepseek-ai/dsh-bash-local": "workspace:^",
     "@deepseek-ai/dsh-invariants": "workspace:^",
-    "@deepseek-ai/dsh-process-local": "workspace:^",
+    "@deepseek-ai/dsh-subprocess-local": "workspace:^",
     "@deepseek-ai/dsh-sandbox": "workspace:^",
     "@deepseek-ai/dsh-sandbox-local": "workspace:^",
     "@deepseek-ai/dsh-sandbox-policy": "workspace:^",

packages/bash/bash-sandbox/src/index.ts

@@ -34,7 +34,7 @@ export type Config = LocalConfig
  * mode; `result.sandbox` reports the mode and enforcement actually used.
  */
 export class SandboxBashExecutor extends LocalBashExecutor {
-  static override inject = ['processes', 'sandbox', 'sandboxPolicy']
+  static override inject = ['subprocess', 'sandbox', 'sandboxPolicy']
 
   // No own Config: the sandbox default (mode + workspaceRoot) moved to
   // ctx.sandboxPolicy, so this executor inherits LocalBashExecutor's Config
@@ -128,7 +128,7 @@ export class SandboxBashExecutor extends LocalBashExecutor {
    * Wrap one shell command via the `ctx.sandbox` provider: hand over the
    * exact `['bash', '-c', command]` argv this executor would spawn, get back
    * the confined argv, and re-assemble it into the `exec …` command string
-   * the inherited spawn path runs (the outer `bash -c` the process manager spawns
+   * the inherited spawn path runs (the outer `bash -c` the subprocess service spawns
    * `exec`s into the runner, so no extra shell lingers). Provider errors
    * (fail-closed `SANDBOX_UNAVAILABLE`) propagate to the caller unchanged.
    */

packages/bash/bash-sandbox/tests/bwrap.e2e.ts

@@ -9,7 +9,7 @@ import { LocalSandboxProvider } from '@deepseek-ai/dsh-sandbox-local'
 import { SandboxPolicyService } from '@deepseek-ai/dsh-sandbox-policy'
 import { bwrapProfileArgs } from '@deepseek-ai/dsh-sandbox-local/src/profiles.ts'
 import { SandboxBashExecutor } from '@deepseek-ai/dsh-bash-sandbox'
-import LocalProcessManager from '@deepseek-ai/dsh-process-local'
+import LocalSubprocessService from '@deepseek-ai/dsh-subprocess-local'
 
 /**
  * Keyless integration of the real provider and executor through public run/start paths. With
@@ -43,7 +43,7 @@ async function sandboxedBash(workspace: string, mode: 'read-only' | 'workspace-w
   ctx = new Context()
   await ctx.plugin(LocalSandboxProvider, {})
   await ctx.plugin(SandboxPolicyService, { mode, workspaceRoot: workspace })
-  await ctx.plugin(LocalProcessManager)
+  await ctx.plugin(LocalSubprocessService)
   await ctx.plugin(SandboxBashExecutor, { cwd: workspace, timeoutMs: 30_000 })
   return ctx.bash as SandboxBashExecutor
 }

packages/bash/bash-sandbox/tests/landlock.e2e.ts

@@ -9,7 +9,7 @@ import { launcherPath } from 'node-addon-landlock-run'
 import { LocalSandboxProvider } from '@deepseek-ai/dsh-sandbox-local'
 import { SandboxPolicyService } from '@deepseek-ai/dsh-sandbox-policy'
 import { SandboxBashExecutor } from '@deepseek-ai/dsh-bash-sandbox'
-import LocalProcessManager from '@deepseek-ai/dsh-process-local'
+import LocalSubprocessService from '@deepseek-ai/dsh-subprocess-local'
 
 /**
  * KEYLESS consumer-integration proof: the REAL `LocalSandboxProvider` (bwrap
@@ -48,7 +48,7 @@ async function sandboxedBash(workspace: string, mode: 'read-only' | 'workspace-w
   await ctx.plugin(LocalSandboxProvider, {})
   ;(ctx.sandbox as LocalSandboxProvider).internals = { probeBwrap: () => false }
   await ctx.plugin(SandboxPolicyService, { mode, workspaceRoot: workspace })
-  await ctx.plugin(LocalProcessManager)
+  await ctx.plugin(LocalSubprocessService)
   await ctx.plugin(SandboxBashExecutor, { cwd: workspace, timeoutMs: 30_000 })
   return ctx.bash as SandboxBashExecutor
 }

packages/bash/bash-sandbox/tests/sandbox.spec.ts

@@ -15,7 +15,7 @@ import { SANDBOX_UNAVAILABLE, SandboxProvider, SandboxUnavailableError } from '@
 import type { ConfinedArgv, SandboxExecutionPolicy, SandboxMode, SandboxPolicy } from '@deepseek-ai/dsh-sandbox'
 import { SandboxPolicyService } from '@deepseek-ai/dsh-sandbox-policy'
 import { SandboxBashExecutor } from '@deepseek-ai/dsh-bash-sandbox'
-import LocalProcessManager from '@deepseek-ai/dsh-process-local'
+import LocalSubprocessService from '@deepseek-ai/dsh-subprocess-local'
 import { classifyDenial, classifyRunnerFailure, shellQuote } from '../src/helpers.ts'
 import type { Config } from '@deepseek-ai/dsh-bash-sandbox'
 
@@ -59,8 +59,8 @@ async function setup(
     ...mode !== undefined ? { mode } : {},
     ...workspaceRoot !== undefined ? { workspaceRoot } : {},
   })
-  await ctx.plugin(LocalProcessManager)
-  ;(ctx.processes as LocalProcessManager).internals = { spillDir }
+  await ctx.plugin(LocalSubprocessService)
+  ;(ctx.subprocess as LocalSubprocessService).internals = { spillDir }
   await ctx.plugin(SandboxBashExecutor, { graceMs: 200, ...execConfig })
   const bash = ctx.bash as SandboxBashExecutor
   return { ctx, bash, calls }

packages/bash/bash-sandbox/tests/seatbelt.e2e.ts

@@ -9,7 +9,7 @@ import { LocalSandboxProvider } from '@deepseek-ai/dsh-sandbox-local'
 import { SandboxPolicyService } from '@deepseek-ai/dsh-sandbox-policy'
 import { seatbeltProfileArgs } from '@deepseek-ai/dsh-sandbox-local/src/profiles.ts'
 import { SandboxBashExecutor } from '@deepseek-ai/dsh-bash-sandbox'
-import LocalProcessManager from '@deepseek-ai/dsh-process-local'
+import LocalSubprocessService from '@deepseek-ai/dsh-subprocess-local'
 
 /**
  * Keyless macOS integration of the real provider and executor through public run/start paths.
@@ -42,7 +42,7 @@ async function sandboxedBash(workspace: string, mode: 'read-only' | 'workspace-w
   await ctx.plugin(LocalSandboxProvider, {})
   ;(ctx.sandbox as LocalSandboxProvider).internals = { probeBwrap: () => false, probeLandlock: () => 'unusable' }
   await ctx.plugin(SandboxPolicyService, { mode, workspaceRoot: workspace })
-  await ctx.plugin(LocalProcessManager)
+  await ctx.plugin(LocalSubprocessService)
   await ctx.plugin(SandboxBashExecutor, { cwd: workspace, timeoutMs: 30_000 })
   return ctx.bash as SandboxBashExecutor
 }