Merge remote-tracking branch 'origin/master' into worktree/dsbench-patch

# Conflicts:
#	packages/bash/bash-local/README.md
#	packages/bash/bash-local/src/index.ts
#	packages/bash/bash-local/src/run.ts
#	packages/bash/bash-local/tests/run.spec.ts
#	packages/examples/agent-spine-demo/README.md
#	packages/examples/agent-spine-demo/src/index.ts
#	packages/ui/jsonrpc/README.md
#	packages/ui/jsonrpc/src/server.ts

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

@@ -96,15 +96,22 @@ export class LocalBashExecutor extends BashExecutor {
       this.config.maxTimeoutMs,
       'bash-local: request.timeoutMs',
     )
+    const stdoutMaxBytes = request.stdoutMaxBytes ?? this.config.maxOutputBytes
+    assertPositiveFinite('request.stdoutMaxBytes', stdoutMaxBytes)
     return {
       command: request.command,
       workdir: request.workdir ?? this.config.cwd ?? process.cwd(),
       timeoutMs,
+      stdoutMaxBytes,
       ...request.signal ? { signal: request.signal } : {},
-      // Explicit environment values are merged after credential scrubbing in run.ts.
+      // Carry stdin/ordinary env/trusted dshEnv through verbatim — optional,
+      // no config default. run.ts owns the scrub and merge order.
       ...request.stdin !== undefined ? { stdin: request.stdin } : {},
       ...request.env !== undefined ? { env: request.env } : {},
-      // Local execution carries this override for sandboxing subclasses.
+      ...request.dshEnv !== undefined ? { dshEnv: request.dshEnv } : {},
+      // Carry a sandbox-mode override through verbatim: this executor never
+      // confines, so the field is inert here (the seam contract) — a
+      // sandboxing subclass overrides resolve() to stamp its default instead.
       sandboxMode: request.sandboxMode,
     }
   }
@@ -115,12 +122,14 @@ export class LocalBashExecutor extends BashExecutor {
     const outcome = await runBash({
       command: spec.command,
       cwd: spec.workdir,
-      maxOutputBytes: this.config.maxOutputBytes,
+      stdoutMaxBytes: spec.stdoutMaxBytes,
+      stderrMaxBytes: this.config.maxOutputBytes,
       maxSpillBytes: this.config.maxSpillBytes,
       graceMs: this.config.graceMs,
       signal: d.signal,
       stdin: spec.stdin,
       env: spec.env,
+      dshEnv: spec.dshEnv,
     }, this.internals).done
     // Only this executor's timeout reason counts as timedOut; outer deadlines count as aborts.
     const timedOut = timeoutOf(d.signal, 'BASH_TIMEOUT') !== undefined
@@ -133,12 +142,14 @@ export class LocalBashExecutor extends BashExecutor {
     const running = runBash({
       command: spec.command,
       cwd: spec.workdir,
-      maxOutputBytes: this.config.maxOutputBytes,
+      stdoutMaxBytes: this.config.maxOutputBytes,
+      stderrMaxBytes: this.config.maxOutputBytes,
       maxSpillBytes: this.config.maxSpillBytes,
       graceMs: this.config.graceMs,
       signal: spec.signal,
       stdin: spec.stdin,
       env: spec.env,
+      dshEnv: spec.dshEnv,
     }, this.internals)
 
     let stdoutOffset = 0