refactor(process): split the process manager out of the bash executor

New process/ capability family: @deepseek-ai/dsh-process owns ctx.processes —
abstract ProcessManager.spawn(spec) over a fully-explicit ProcessSpawnSpec —
plus the shared DSH_* managed-environment and CollectedOutput vocabulary;
@deepseek-ai/dsh-process-local carries the former bash-local run.ts plumbing
(detached groups, tail-keep spill-backed output, credential scrub, kill
escalation, kill-and-join disposal) with no config of its own.

dsh-bash-local becomes a consumer: it keeps command defaulting, the fused
deadline timedOut/aborted classification, the model-friendly terminal env
(now merged through the ordinary env channel), and the [stderr]-marked
background read merge, and spawns through ctx.processes. Background-process
lifetime moves to the manager, so an executor reload no longer kills live
background work; a background spawn failure is injected once into the read
path instead of being buffered as fake stderr. dsh-bash re-exports the moved
vocabulary so bash consumers keep one import root; dsh-bash-sandbox only
redeclares the inherited inject.

Every composition loading a bash executor now loads dsh-process-local (CLI,
examples, python bundled runtime, create-sdk bash feature, inline test
configs).

packages/hooks/hooks-claude/package.json

@@ -46,6 +46,7 @@
     "@deepseek-ai/dsh-agent-loop-testkit": "workspace:^",
     "@deepseek-ai/dsh-bash": "workspace:^",
     "@deepseek-ai/dsh-bash-local": "workspace:^",
+    "@deepseek-ai/dsh-process-local": "workspace:^",
     "@deepseek-ai/dsh-hook-protocol": "workspace:^",
     "@deepseek-ai/dsh-invariants": "workspace:^",
     "@deepseek-ai/dsh-llm": "workspace:^",

packages/hooks/hooks-claude/tests/bridge.spec.ts

@@ -10,6 +10,7 @@ import type { Agent } from '@deepseek-ai/dsh-agent'
 import AgentLoop from '@deepseek-ai/dsh-agent-loop'
 import { mountAgentLoopTestDependencies } from '@deepseek-ai/dsh-agent-loop-testkit'
 import { LocalBashExecutor } from '@deepseek-ai/dsh-bash-local'
+import LocalProcessManager from '@deepseek-ai/dsh-process-local'
 import { scopeTarget } from '@deepseek-ai/dsh-scope'
 import SubagentService, { SubagentRunId } from '@deepseek-ai/dsh-subagent'
 import * as HooksClaude from '@deepseek-ai/dsh-hooks-claude'
@@ -52,6 +53,7 @@ async function harnessWithFiber(configDir: string, adapter: MockAdapter): Promis
   const ctx = new Context()
   await mountAgentLoopTestDependencies(ctx)
   await ctx.plugin(AgentLoop, { agents: [] })
+  await ctx.plugin(LocalProcessManager)
   await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000 })
   const hooks = await ctx.plugin(HooksClaude, { configPath: join(configDir, 'hooks.json') })
   ctx.llm.registerAdapter(['mock'], adapter)
@@ -353,6 +355,7 @@ describe('hooks-claude bridge — load resilience', () => {
     const ctx = new Context()
     await mountAgentLoopTestDependencies(ctx)
     await ctx.plugin(AgentLoop, { agents: [] })
+    await ctx.plugin(LocalProcessManager)
     await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000 })
     await ctx.plugin(HooksClaude, { configPath: '/nonexistent/hooks.json' })
     ctx.llm.registerAdapter(['mock'], adapter)
@@ -374,6 +377,7 @@ describe('hooks-claude bridge — load resilience', () => {
     const ctx = new Context()
     await mountAgentLoopTestDependencies(ctx)
     await ctx.plugin(AgentLoop, { agents: [] })
+    await ctx.plugin(LocalProcessManager)
     await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000 })
     const fiber = await ctx.plugin(HooksClaude, { configPath: join(dir, 'hooks.json') })
     await fiber.dispose()

packages/hooks/hooks-claude/tests/coverage-cases.ts

@@ -10,6 +10,7 @@ import type { Agent } from '@deepseek-ai/dsh-agent'
 import AgentLoop from '@deepseek-ai/dsh-agent-loop'
 import { mountAgentLoopTestDependencies } from '@deepseek-ai/dsh-agent-loop-testkit'
 import { LocalBashExecutor } from '@deepseek-ai/dsh-bash-local'
+import LocalProcessManager from '@deepseek-ai/dsh-process-local'
 import { scopeTarget } from '@deepseek-ai/dsh-scope'
 import SubagentService, { SubagentRunId } from '@deepseek-ai/dsh-subagent'
 import * as HooksClaude from '@deepseek-ai/dsh-hooks-claude'
@@ -41,6 +42,7 @@ async function harness(configPath: string, adapter: MockAdapter, opts: HarnessOp
   await mountAgentLoopTestDependencies(ctx)
   if (opts.sessionRoot !== undefined) await ctx.plugin(SessionPersistenceJsonl, { root: opts.sessionRoot })
   await ctx.plugin(AgentLoop, { agents: [] })
+  await ctx.plugin(LocalProcessManager)
   await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000 })
   await ctx.plugin(HooksClaude, { configPath, ...opts })
   ctx.llm.registerAdapter(['mock'], adapter)
@@ -359,6 +361,7 @@ export function defineCoverageCases(group: CoverageGroup): void {
       const ctx = new Context()
       await mountAgentLoopTestDependencies(ctx)
       await ctx.plugin(AgentLoop, { agents: [] })
+      await ctx.plugin(LocalProcessManager)
       await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000 })
       // Direct apply with only configPath — bypasses schemastery's defaults, so
       // the bridge must run on the raw minimal config (the per-hook timeout is
@@ -657,6 +660,7 @@ export function defineCoverageCases(group: CoverageGroup): void {
       await mountAgentLoopTestDependencies(ctx)
       await ctx.plugin(AgentLoop, { agents: [] })
       // Executor default cwd = serverDir (deliberately NOT the session cwd).
+      await ctx.plugin(LocalProcessManager)
       await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000, cwd: serverDir })
       await ctx.plugin(HooksClaude, { configPath: join(serverDir, 'hooks.json') })
       ctx.llm.registerAdapter(['mock'], adapter)
@@ -686,6 +690,7 @@ export function defineCoverageCases(group: CoverageGroup): void {
       await mountAgentLoopTestDependencies(ctx)
       await ctx.plugin(AgentLoop, { agents: [] })
       // Executor default cwd = serverDir (deliberately NOT the child session cwd).
+      await ctx.plugin(LocalProcessManager)
       await ctx.plugin(LocalBashExecutor, { timeoutMs: 10_000, cwd: serverDir })
       await ctx.plugin(HooksClaude, { configPath: join(serverDir, 'hooks.json') })
       ctx.llm.registerAdapter(['mock'], new MockAdapter([]))