diff --git a/packages/adapter-utils/src/execution-target-kind.ts b/packages/adapter-utils/src/execution-target-kind.ts
index a95c76c50cd..bf4f809363e 100644
--- a/packages/adapter-utils/src/execution-target-kind.ts
+++ b/packages/adapter-utils/src/execution-target-kind.ts
@@ -6,4 +6,3 @@ export function adapterExecutionTargetIsCommandBacked(
 ): target is AdapterCommandBackedExecutionTarget {
   return target?.kind === "remote" && (target.transport === "sandbox" || target.transport === "computer");
 }
-
diff --git a/packages/adapter-utils/src/execution-target.test.ts b/packages/adapter-utils/src/execution-target.test.ts
index 46a4df7d6d5..88919a99f37 100644
--- a/packages/adapter-utils/src/execution-target.test.ts
+++ b/packages/adapter-utils/src/execution-target.test.ts
@@ -5,6 +5,9 @@ import * as ssh from "./ssh.js";
 import * as serverUtils from "./server-utils.js";
 import {
   cleanupGitHubOperationLaunchers,
+  adapterExecutionTargetRuntimeRoot,
+  prepareAdapterExecutionTargetRuntime,
+  type AdapterComputerExecutionTarget,
   prepareGitHubOperationLaunchers,
   adapterExecutionTargetUsesManagedHome,
   ensureAdapterExecutionTargetRuntimeCommandInstalled,
@@ -437,3 +440,36 @@ describe("GitHub launcher lifecycle", () => {
     expect(runner.execute).toHaveBeenCalledTimes(1);
   });
 });
+
+
+describe("computer legacy runtime ownership", () => {
+  it.each(["claude", "codex"])("isolates %s assets and callback roots for owners sharing a checkout", async adapterKey => {
+    const execute = vi.fn(async () => ({ exitCode: 0, signal: null, timedOut: false, stdout: "", stderr: "", pid: 123, startedAt: "2026-10-10T00:00:00Z" }));
+    const target = (ownerId: string, generation = 1) => ({
+      kind: "remote", transport: "computer", providerKey: "boat", environmentId: "environment",
+      leaseId: ownerId, remoteCwd: "/shared/project", listenerPort: 43127,
+      runner: { execute }, processRunner: { execute },
+      resourceAuthority: { kind: "computer-owner", computerId: "computer", ownerId, generation },
+      fileAuthority: { kind: "remote-persistent", placementId: "shared", root: "/shared/project", agentHome: `/homes/${ownerId}` },
+      launch: vi.fn(), inspectProcess: vi.fn(), retainWarm: vi.fn(), retire: vi.fn(),
+      computerTool: { command: "cua-driver", args: ["mcp"] },
+    } satisfies AdapterComputerExecutionTarget);
+    const prepare = (owner: AdapterComputerExecutionTarget) => prepareAdapterExecutionTargetRuntime({
+      target: owner, runId: owner.leaseId!, adapterKey, workspaceLocalDir: "/unused-local-workspace", syncWorkspace: false,
+    });
+    const first = await prepare(target("agent-one"));
+    const second = await prepare(target("agent-two"));
+    expect(first.workspaceRemoteDir).toBe("/shared/project");
+    expect(second.workspaceRemoteDir).toBe(first.workspaceRemoteDir);
+    expect(first.runtimeRootDir).toBe(adapterExecutionTargetRuntimeRoot(target("agent-one"), adapterKey));
+    expect(second.runtimeRootDir).not.toBe(first.runtimeRootDir);
+    expect(adapterExecutionTargetRuntimeRoot(target("agent-one", 2), adapterKey)).not.toBe(first.runtimeRootDir);
+    expect((await prepare(target("agent-one"))).runtimeRootDir).toBe(first.runtimeRootDir);
+    expect(first.runtimeRootDir).toMatch(new RegExp(`^/shared/project/\\.paperclip-runtime/${adapterKey}/owners/[a-f0-9]{64}$`));
+  });
+
+  it("preserves the existing sandbox runtime root", () => {
+    const target = { kind: "remote", transport: "sandbox", remoteCwd: "/workspace" } as const;
+    expect(adapterExecutionTargetRuntimeRoot(target, "claude")).toBe("/workspace/.paperclip-runtime/claude");
+  });
+});
diff --git a/packages/adapter-utils/src/runner-connectivity.test.ts b/packages/adapter-utils/src/runner-connectivity.test.ts
index 68a8b6d36de..e345a7ccc82 100644
--- a/packages/adapter-utils/src/runner-connectivity.test.ts
+++ b/packages/adapter-utils/src/runner-connectivity.test.ts
@@ -210,3 +210,29 @@ describe("paperclip runner transport routing", () => {
     ).toThrow();
   });
 });
+
+it("uses each computer owner's allocated port without changing the sandbox default", async () => {
+  const { adapterExecutionTargetIsCommandBacked } = await import("./execution-target.js");
+  const endpoint = ingress();
+  const getRunnerIngressEndpoint = vi.fn(async () => endpoint);
+  const base = {
+    kind: "remote" as const, transport: "computer" as const, providerKey: "boat", remoteCwd: "/home/user/project",
+    leaseId: "attempt-lease", listenerPort: 45101, effectiveCapabilities: capabilities, getRunnerIngressEndpoint,
+    processRunner: { execute: async () => ({ exitCode: 0, signal: null, timedOut: false, stdout: "", stderr: "", pid: null, startedAt: new Date().toISOString() }) },
+    resourceAuthority: { kind: "computer-owner" as const, computerId: "machine", ownerId: "owner-a", generation: 2 },
+    fileAuthority: { kind: "remote-persistent" as const, placementId: "placement", root: "/home/user/project", agentHome: "/home/user/agent-a" },
+    launch: async () => ({}), inspectProcess: async () => ({ running: true, claim: {} }),
+    retainWarm: async () => {}, retire: async () => true, computerTool: { command: "cua-driver", args: ["mcp"] },
+  };
+  expect(adapterExecutionTargetIsCommandBacked(base)).toBe(true);
+  for (const port of [45101, 45102]) {
+    const resolved = await resolvePaperclipRunnerTransport({ target: { ...base, listenerPort: port }, runId: "run-1",
+      localConnectUrl: "ws://localhost/unused", runnerIngressAuthorized: true });
+    expect(resolved).toMatchObject({ mode: "provider_ingress", listenPort: port });
+    expect(getRunnerIngressEndpoint).toHaveBeenLastCalledWith({ leaseId: "attempt-lease", port, path: "/api/runner/v1/connect/run-1" });
+  }
+  const { listenerPort, processRunner, resourceAuthority, fileAuthority, launch, inspectProcess, retainWarm, retire, computerTool, ...common } = base;
+  const resolved = await resolvePaperclipRunnerTransport({ target: { ...common, transport: "sandbox" }, runId: "sandbox-run",
+    localConnectUrl: "ws://localhost/unused", runnerIngressAuthorized: true });
+  expect(resolved).toMatchObject({ mode: "provider_ingress", listenPort: 43127 });
+});
diff --git a/packages/adapter-utils/src/ssh-fixture.test.ts b/packages/adapter-utils/src/ssh-fixture.test.ts
index 39d3c52515e..bc2d6abc92b 100644
--- a/packages/adapter-utils/src/ssh-fixture.test.ts
+++ b/packages/adapter-utils/src/ssh-fixture.test.ts
@@ -6,6 +6,7 @@ import path from "node:path";
 import { afterAll, afterEach, describe, expect, it } from "vitest";
 import {
   buildSshSpawnTarget,
+  createSshCommandManagedRuntimeRunner,
   buildSshEnvLabFixtureConfig,
   getSshEnvLabSupport,
   prepareWorkspaceForSshExecution,
@@ -181,6 +182,28 @@ describe("ssh env-lab fixture", () => {
   // this drains it too instead of stranding a listener until the process exits.
   afterAll(drainFixtureTeardowns);
 
+  it.each([0, 7])("handles a closed SSH input pipe without losing exit diagnostics (exit %i)", async (exitCode) => {
+    const rootDir = await createFixtureRootDir();
+    const previousPath = process.env.PATH;
+    await writeFile(path.join(rootDir, "ssh"), `#!/bin/sh
+exec 0<&-
+printf 'remote rejected upload' >&2
+sleep 0.05
+exit ${exitCode}
+`, { mode: 0o700 });
+    process.env.PATH = `${rootDir}${path.delimiter}${previousPath ?? ""}`;
+    try {
+      const runner = createSshCommandManagedRuntimeRunner({ spec: UNREACHABLE_SSH_SPEC });
+      const result = await runner.execute({ command: "cat", stdin: "x".repeat(8 * 1024 * 1024), timeoutMs: 5000 });
+      expect(result.exitCode).toBe(exitCode === 0 ? null : exitCode);
+      expect(result.stderr).toBe("remote rejected upload");
+      expect(result.timedOut).toBe(false);
+    } finally {
+      if (previousPath === undefined) delete process.env.PATH;
+      else process.env.PATH = previousPath;
+    }
+  });
+
   it("starts an isolated sshd fixture and executes commands through it", async () => {
     const rootDir = await createFixtureRootDir();
     const statePath = path.join(rootDir, "state.json");
diff --git a/packages/adapters/claude-local/src/server/execute.remote.test.ts b/packages/adapters/claude-local/src/server/execute.remote.test.ts
index cbb6ed55013..58118a838e6 100644
--- a/packages/adapters/claude-local/src/server/execute.remote.test.ts
+++ b/packages/adapters/claude-local/src/server/execute.remote.test.ts
@@ -231,6 +231,31 @@ describe("claude remote execution", () => {
     }));
   });
 
+  it("keeps an authoritative remote workspace in place while delivering managed Claude assets", async () => {
+    const rootDir = await mkdtemp(path.join(os.tmpdir(), "paperclip-claude-in-place-"));
+    cleanupDirs.push(rootDir);
+    await execute({
+      runId: "run-in-place",
+      agent: { id: "agent-1", companyId: "company-1", name: "Claude", adapterType: "claude_local", adapterConfig: {} },
+      runtime: { sessionId: null, sessionParams: null, sessionDisplayId: null, taskKey: null },
+      config: { engine: "cli", command: "claude", cwd: "/stale-host-cwd" },
+      context: { paperclipWorkspace: { cwd: "/remote-only-agent-home", source: "agent_home" } },
+      executionTarget: {
+        kind: "remote", transport: "ssh", remoteCwd: "/old-copied-workspace",
+        workspaceRealization: { mode: "in_place", authoritativeRoot: "/persistent-project", pathAliases: [], outboundRestorePaths: [] },
+        spec: { host: "127.0.0.1", port: 2222, username: "fixture", remoteWorkspacePath: "/persistent-project", remoteCwd: "/persistent-project",
+          privateKey: "PRIVATE KEY", knownHosts: "[127.0.0.1]:2222 ssh-ed25519 AAAA", strictHostKeyChecking: true },
+      },
+      onLog: async () => {},
+    });
+    expect(prepareWorkspaceForSshExecution).not.toHaveBeenCalled();
+    expect(restoreWorkspaceFromSshExecution).not.toHaveBeenCalled();
+    expect(syncDirectoryToSsh).toHaveBeenCalledTimes(2);
+    expect(syncDirectoryToSsh).toHaveBeenCalledWith(expect.objectContaining({ remoteDir: "/persistent-project/.paperclip-runtime/claude/skills" }));
+    const call = runChildProcess.mock.calls[0] as unknown as [string, string, string[], { remoteExecution: { remoteCwd: string } }];
+    expect(call[3].remoteExecution.remoteCwd).toBe("/persistent-project");
+  });
+
   it("does not resume saved Claude sessions for remote SSH execution without a matching remote identity", async () => {
     const rootDir = await mkdtemp(path.join(os.tmpdir(), "paperclip-claude-remote-resume-"));
     cleanupDirs.push(rootDir);
diff --git a/packages/paperclip-runner/src/contracts/runtime-context.test.ts b/packages/paperclip-runner/src/contracts/runtime-context.test.ts
index 09a931317cf..cc5a0332541 100644
--- a/packages/paperclip-runner/src/contracts/runtime-context.test.ts
+++ b/packages/paperclip-runner/src/contracts/runtime-context.test.ts
@@ -37,6 +37,13 @@ function savedContext(revision: string, text: string) {
 }
 
 describe("persisted native execution prompts", () => {
+  it("preserves an authenticated persistent home independently of instruction copies", () => {
+    const context = { ...savedContext("saved", "Instructions"), persistentAgentHome: { rootPath: "/computer/agent" } };
+    expect(parseNativeRuntimeContext(context).persistentAgentHome).toEqual({ rootPath: "/computer/agent" });
+    expect(parseNativeRuntimeContext(context).instructions.workingCopy).toBeUndefined();
+    expect(() => parseNativeRuntimeContext({ ...context, persistentAgentHome: { rootPath: "" } })).toThrow();
+    expect(() => parseNativeRuntimeContext({ ...context, persistentAgentHome: { rootPath: "/computer/agent", untrusted: true } })).toThrow();
+  });
   it.each([
     ["snapshot-before-upgrade", "Saved instructions from before the upgrade."],
     ["future-prompt-fixture", "  Saved instructions absent from this release.\n"],
diff --git a/packages/paperclip-runner/src/drivers/acpx/agent-files-binding.test.ts b/packages/paperclip-runner/src/drivers/acpx/agent-files-binding.test.ts
index 27437e8fde9..846e4df593b 100644
--- a/packages/paperclip-runner/src/drivers/acpx/agent-files-binding.test.ts
+++ b/packages/paperclip-runner/src/drivers/acpx/agent-files-binding.test.ts
@@ -18,6 +18,19 @@ function fixture() {
 }
 
 describe("registered ACP agent files", () => {
+  it("binds a persistent computer home without inventing an instruction copy", () => {
+    const { root, parent, context } = fixture();
+    delete context.instructions.workingCopy;
+    context.persistentAgentHome = { rootPath: root };
+    const nestedRuntime = join(root, ".paperclip-runtime"); mkdirSync(nestedRuntime);
+    const binding = bindAcpxAgentFiles(context, [nestedRuntime])!;
+    expect(binding.root.endsWith("registered-run-copy")).toBe(true);
+    for (const protectedRoot of [parent, root]) {
+      expect(() => bindAcpxAgentFiles(context, [protectedRoot])).toThrow("overlaps");
+    }
+    renameSync(root, `${root}-old`); mkdirSync(root);
+    expect(() => binding.assertHeld()).toThrow("changed");
+  });
   it("does not grant absent or legacy instruction copies", () => {
     expect(bindAcpxAgentFiles(null, [])).toBeNull();
     const { context } = fixture();
diff --git a/packages/paperclip-runner/src/drivers/acpx/runtime-host.test.ts b/packages/paperclip-runner/src/drivers/acpx/runtime-host.test.ts
index e3f1d9512d5..9af98b14c11 100644
--- a/packages/paperclip-runner/src/drivers/acpx/runtime-host.test.ts
+++ b/packages/paperclip-runner/src/drivers/acpx/runtime-host.test.ts
@@ -949,6 +949,34 @@ describe("ACPX runtime host", () => {
     expect(fixture.commandClose).toHaveBeenCalledOnce();
   });
 
+  it("gives Claude shells only the registered persistent home while keeping provider HOME isolated", async () => {
+    const fixture = await hostFixture();
+    const home = await realpath(await mkdtemp(join(tmpdir(), "paperclip-computer-agent-home-")));
+    temporaryDirectories.push(home);
+    const context: NativeRuntimeContextSnapshot = {
+      prompt: { revision: PAPERCLIP_EXECUTION_PROMPT_REVISION, text: PAPERCLIP_EXECUTION_PROMPT, digest: nativeRuntimePromptDigest() },
+      instructions: { entryPath: "AGENTS.md", bundle: { schema: NATIVE_RUNTIME_ASSET_SCHEMA, digest: "0".repeat(64), manifestDigest: "0".repeat(64), rootPath: home, fileCount: 0, totalBytes: 0 } },
+      persistentAgentHome: { rootPath: home }, skills: [],
+      mcp: { assignmentSetId: "none", digest: "0".repeat(64), bindingId: null }, aggregateDigest: "",
+    };
+    context.aggregateDigest = canonicalNativeRuntimeContextDigest(context);
+    let observed: { home: string; agentHome: string } | undefined;
+    const host = await AcpxRuntimeHost.open({ ...fixture.options, agent: "claude", model: "claude-sonnet-5",
+      environment: { AGENT_HOME: "/ambient/untrusted" }, runtimeContext: context,
+    }, fixture.dependencies({ openRuntime: async launch => {
+      observed = JSON.parse(execFileSync(process.execPath, ["-e", 'console.log(JSON.stringify({home:process.env.HOME,agentHome:process.env.AGENT_HOME}))'], {
+        env: launch.launchEnvironment, encoding: "utf8", timeout: 5_000,
+      }));
+      return runtimePort({ getStatus: async () => ({ models: { currentModelId: "claude-sonnet-5" } }) });
+    } }));
+    try {
+      expect(observed?.agentHome).toBe(home);
+      expect(observed?.home).not.toBe(home);
+      expect(observed?.home).toContain("home");
+      expect(context.instructions.workingCopy).toBeUndefined();
+    } finally { await host.close({ reason: "persistent home verified" }); }
+  });
+
   it.each(["cursor", "copilot", "pi"] as const)("binds %s agent files from each registered run copy, never ambient roots", async (agent) => {
     const fixture = await hostFixture();
     const copies = await mkdtemp(join(tmpdir(), "paperclip-agent-copies-"));
diff --git a/packages/paperclip-runner/src/drivers/runtime-context-materializer.test.ts b/packages/paperclip-runner/src/drivers/runtime-context-materializer.test.ts
index 062482ecad5..4e68be2944b 100644
--- a/packages/paperclip-runner/src/drivers/runtime-context-materializer.test.ts
+++ b/packages/paperclip-runner/src/drivers/runtime-context-materializer.test.ts
@@ -1,3 +1,4 @@
+import { createRunnerdCodexAppServerArgs } from "../live/runnerd-codex-transport.js";
 import {
   chmod,
   lstat,
@@ -27,6 +28,7 @@ import { nativeMcpLaunchBinding } from "./native-mcp.js";
 import {
   materializeNativeRuntimeSkills,
   prepareIsolatedCodexHome,
+  releaseMaterializedNativeRuntimeSkills,
 } from "./runtime-context-materializer.js";
 
 const roots: string[] = [];
@@ -93,6 +95,19 @@ function context(
 }
 
 describe("runtime context materialization", () => {
+  it("installs only the trusted environment computer binding and removes it on refresh without that capability", async () => {
+    const root = await mkdtemp(join(tmpdir(), "paperclip-computer-context-"));
+    roots.push(root);
+    const codexHome = join(root, "codex-home");
+    await prepareIsolatedCodexHome({ context: null, codexHome,
+      computerTool: { command: "/opt/ascii/cua-driver/cua-driver", args: ["mcp", "--socket", "/run/ascii-cua/driver.sock"] } });
+    const config = await readFile(join(codexHome, "config.toml"), "utf8");
+    expect(config).toContain("[mcp_servers.paperclip_computer]");
+    expect(config).toContain('command = "/opt/ascii/cua-driver/cua-driver"');
+    await releaseMaterializedNativeRuntimeSkills(join(codexHome, "skills"));
+    await prepareIsolatedCodexHome({ context: null, codexHome });
+    expect(await readFile(join(codexHome, "config.toml"), "utf8")).not.toContain("paperclip_computer");
+  });
   it("restores the legacy working-copy contract without changing its digest or adding new fields", () => {
     const old = context("/skills", "/instructions");
     old.instructions.workingCopy = { rootPath: "/old-run/copy", entryPath: "AGENTS.md" };
@@ -503,3 +518,12 @@ command = "untrusted-command"
     await expect(stat(join(symlinkCodexHome, "auth.json"))).rejects.toThrow();
   });
 });
+
+it("exposes a trusted persistent personal directory without instruction files", () => {
+  const options = { environment: { AGENT_HOME: "/untrusted", HOME: "/ambient" }, codexHome: "/private-provider" };
+  const supplied = createRunnerdCodexAppServerArgs({ ...options, persistentAgentHome: "/personal/agent" }).join("\n");
+  expect(supplied).toContain('AGENT_HOME="/personal/agent"');
+  expect(supplied).toContain('"/private-provider"="none"');
+  expect(supplied).not.toContain('AGENT_HOME="/untrusted"');
+  expect(createRunnerdCodexAppServerArgs(options).join("\n")).not.toContain("AGENT_HOME");
+});
diff --git a/packages/paperclip-runner/src/live/runnerd-codex-transport.test.ts b/packages/paperclip-runner/src/live/runnerd-codex-transport.test.ts
index c0615de84ca..243a5c3c781 100644
--- a/packages/paperclip-runner/src/live/runnerd-codex-transport.test.ts
+++ b/packages/paperclip-runner/src/live/runnerd-codex-transport.test.ts
@@ -643,6 +643,46 @@ it("retargets only composed instruction framing and retains legacy custom instru
 
 });
 
+it.each([false, true])("preserves ACPX asset framing across cold, warm, and post-idle attachment (guidance=%s)", (guidance) => {
+  const source = assignedRuntimeContext("/controller/skills", "/controller/bundle");
+  const cold = assignedRuntimeContext("/boat/skills", "/boat/context/cold");
+  const resumed = assignedRuntimeContext("/boat/skills", "/boat/context/resumed");
+  const custom = "Managed instructions with literal /controller/bundle example.";
+  const original = composeNativeSystemInstructions(source, custom);
+  const coldText = runnerdRecoveryInternals.retargetComposedInstructions(
+    runnerdRecoveryInternals.withComputerProcessInstructions(original, guidance, source),
+    source,
+    cold,
+  );
+  const suffix = (context: NativeRuntimeContextSnapshot) =>
+    composeNativeSystemInstructions(context, "").slice(context.prompt.text.length);
+  expect(coldText.endsWith(suffix(cold))).toBe(true);
+  const state = { runAttachTemplate: { provider: {
+    kind: "acpx", agent: "claude", runId: "cold-run", runtimeContext: cold, instructions: coldText,
+  } } };
+  const desired = {
+    runnerInstanceId: "runner", environmentLeaseId: "workspace", runId: "warm-run",
+    normalizedSessionId: "same-session", turnId: "turn", itemId: "item",
+  };
+  const warm = runnerdRecoveryInternals.rotatedRunAttachPayload(state, desired, null, undefined);
+  expect((warm.provider as { instructions: string }).instructions).toBe(coldText);
+  const recover = (text: string) => runnerdRecoveryInternals.rotatedRunAttachPayload(
+    { runAttachTemplate: warm }, { ...desired, runId: "post-idle-run" }, null, undefined, resumed,
+    { text, context: source },
+  ).provider as { instructions: string; runtimeContext: NativeRuntimeContextSnapshot };
+  const recovered = recover(composeNativeSystemInstructions(source, custom));
+  expect(recovered.runtimeContext).toEqual(resumed);
+  expect(recovered.instructions.endsWith(suffix(resumed))).toBe(true);
+  // This is the immutable-prefix equality required by Claude's guest guard.
+  expect(recovered.instructions.slice(0, -suffix(resumed).length))
+    .toBe(coldText.slice(0, -suffix(cold).length));
+  expect(recovered.instructions).toContain(custom);
+  expect(recovered.instructions).not.toContain("Read-only instruction sibling root: /controller/");
+  // Never silently substitute old managed instructions for current grants.
+  expect(recover(composeNativeSystemInstructions(source, "Changed managed instructions")).instructions)
+    .toContain("Changed managed instructions");
+});
+
 it("replays the durable run attachment outcome and latest provider identity", () => {
   expect(
     runnerdRecoveryInternals.recoveredRunAttachment({
@@ -2158,6 +2198,32 @@ it.each(["installed", "explicit"] as const)("records the selected %s Codex comma
   }
 });
 
+it.each([false, true])("binds detached-process guidance only for a trusted persistent computer (%s)", async (computer) => {
+  const root = await mkdtemp(join(tmpdir(), "paperclip-computer-process-guidance-"));
+  const runnerBinary = join(root, "runnerd");
+  await writeFile(runnerBinary, "unexecuted fixture artifact", { mode: 0o700 });
+  let instructions = "";
+  const { transport } = createCapabilityRunnerdCodexTransport({
+    provider: "codex", runnerBinary, stateDirectory: root, sourceCodexHome: "",
+    codexCommand: "/qualified/codex", persistentAgentHome: computer ? "/agent/home" : undefined,
+    controlPlaneRegistration: async (authority) => {
+      instructions = String((authority.store.state.runAttachTemplate!.provider as { instructions: string }).instructions);
+      throw new Error("fixture_stop_before_runner_launch");
+    },
+    runnerProcessLauncher: () => { throw new Error("must not launch"); },
+  });
+  try {
+    await expect(transport.request("thread/start", { cwd: root, model: "gpt-6.1-sol", dynamicTools: [],
+      developerInstructions: "Preserve the task instructions." })).rejects.toThrow("fixture_stop_before_runner_launch");
+    expect(instructions).toContain("Preserve the task instructions.");
+    expect(instructions.includes("nohup setsid")).toBe(computer);
+    if (computer) {
+      expect(instructions).toContain("stop when its warm timeout expires");
+      expect(instructions).toContain("Do not create services or change runner ownership");
+    }
+  } finally { await transport.close(); await rm(root, { recursive: true, force: true }); }
+});
+
 it("rejects remote Codex without a guest executable before resolving controller dependencies", async () => {
   const root = await mkdtemp(join(tmpdir(), "paperclip-runner-remote-codex-command-"));
   const runnerBinary = join(root, "runnerd");
diff --git a/packages/paperclip-runner/src/native-session-runtime.test.ts b/packages/paperclip-runner/src/native-session-runtime.test.ts
index 610813ef9c6..83ecfe439df 100644
--- a/packages/paperclip-runner/src/native-session-runtime.test.ts
+++ b/packages/paperclip-runner/src/native-session-runtime.test.ts
@@ -326,7 +326,7 @@ describe("executeNativeSession recovery", () => {
       const completeRun = vi.fn(async () => {});
       try {
         const execution = executeNativeSession({
-          input, turnTimeoutMs,
+          input, turnTimeoutMs, bootstrapTimeoutMs: 5,
           backend: {
             async descriptor() { return { kind: "mock", name: "long-lived", version: "1", capabilities }; },
             async openSession() { return session; },
@@ -2256,15 +2256,18 @@ describe("executeNativeSession recovery", () => {
           runnerInstanceId: "runner-recovery",
           controlPlaneInstanceId: "control-recovery",
           timeoutMs: 5,
+          bootstrapTimeoutMs: 10,
         });
       const execution = execute();
       const rejection = expect(execution).rejects.toThrow(
-        "native session bootstrap timed out after 5ms",
+        "native session bootstrap timed out after 10ms",
       );
 
       await bootstrapStarted;
       expect(bootstrapSignal?.aborted).toBe(false);
       await vi.advanceTimersByTimeAsync(5);
+      expect(bootstrapSignal?.aborted).toBe(false);
+      await vi.advanceTimersByTimeAsync(5);
       await rejection;
       expect(bootstrapSignal?.aborted).toBe(true);
       expect(openRun).not.toHaveBeenCalled();
@@ -2659,6 +2662,7 @@ describe("executeNativeSession recovery", () => {
           runnerInstanceId: "runner-recovery",
           controlPlaneInstanceId: "control-recovery",
           timeoutMs: 10,
+          bootstrapTimeoutMs: 100,
           keepSessionOpen: true,
           onSession: (current) => retainedSessions.push(current),
         });
@@ -5513,6 +5517,7 @@ describe("executeNativeSession recovery", () => {
         controlPlaneInstanceId: "control-recovery",
         persistedSession: structuredClone(checkpoint),
         timeoutMs: 5,
+        bootstrapTimeoutMs: 100,
         onSession,
       });
       const rejection = expect(execution).rejects.toThrow(
@@ -5648,15 +5653,18 @@ describe("executeNativeSession recovery", () => {
         controlPlaneInstanceId: "control-recovery",
         persistedSession: structuredClone(checkpoint),
         timeoutMs: 5,
+        bootstrapTimeoutMs: 10,
         onSession,
       });
       const rejection = expect(execution).rejects.toThrow(
-        "native session replacement bootstrap timed out after 5ms",
+        "native session replacement bootstrap timed out after 10ms",
       );
 
       await replacementStarted;
       expect(replacementSignal?.aborted).toBe(false);
       await vi.advanceTimersByTimeAsync(5);
+      expect(replacementSignal?.aborted).toBe(false);
+      await vi.advanceTimersByTimeAsync(5);
       await rejection;
       expect(replacementSignal?.aborted).toBe(true);
       expect(openRun).not.toHaveBeenCalled();
diff --git a/server/src/__tests__/claude-local-execute.test.ts b/server/src/__tests__/claude-local-execute.test.ts
index adea792ca6e..3423cd406c5 100644
--- a/server/src/__tests__/claude-local-execute.test.ts
+++ b/server/src/__tests__/claude-local-execute.test.ts
@@ -983,6 +983,110 @@ describe("claude execute", () => {
     }
   }, 10_000);
 
+  it("uses registered persistent instruction paths in computer CLI prompts", async () => {
+    const root = await fs.mkdtemp(path.join(os.tmpdir(), "paperclip-claude-execute-sandbox-"));
+    const localWorkspace = path.join(root, "workspace");
+    const remoteWorkspace = path.join(root, "sandbox-$HOME");
+    const binDir = path.join(root, "bin");
+    const commandPath = path.join(binDir, "claude");
+    const capturePath1 = path.join(remoteWorkspace, "capture-1.json");
+    const claudeRoot = path.join(root, ".claude");
+    const localInstructions = path.join(localWorkspace, "AGENTS.md");
+    const remoteInstructions = path.join(remoteWorkspace, "nested", "AGENTS.md");
+    const runner = createLocalSandboxRunner();
+    const previousHome = process.env.HOME;
+    const previousPath = process.env.PATH;
+
+    await fs.mkdir(localWorkspace, { recursive: true });
+    await fs.mkdir(remoteWorkspace, { recursive: true });
+    await fs.mkdir(binDir, { recursive: true });
+    await fs.mkdir(claudeRoot, { recursive: true });
+    await fs.writeFile(path.join(claudeRoot, "settings.json"), JSON.stringify({ theme: "test" }), "utf8");
+    await writeFakeClaudeCommand(commandPath);
+
+    await fs.writeFile(localInstructions, "Persistent guidance contents.");
+    process.env.HOME = root;
+    process.env.PATH = `${binDir}${path.delimiter}${process.env.PATH ?? ""}`;
+
+    try {
+      const result = await execute({
+        runId: "run-sandbox-auth",
+        agent: {
+          id: "agent-1",
+          companyId: "company-1",
+          name: "Claude Coder",
+          adapterType: "claude_local",
+          adapterConfig: { engine: "cli" },
+        },
+        runtime: {
+          sessionId: null,
+          sessionParams: null,
+          sessionDisplayId: null,
+          taskKey: null,
+        },
+        config: {
+          engine: "cli",
+          managedAiConnection: true,
+          command: commandPath,
+          cwd: localWorkspace,
+          instructionsFilePath: localInstructions,
+          env: {
+            CLAUDE_CONFIG_DIR: claudeRoot,
+            PAPERCLIP_TEST_CAPTURE_PATH: capturePath1,
+          },
+          promptTemplate: "Follow the paperclip heartbeat.",
+        },
+        context: { paperclipWorkspace: { instructionsFilePath: remoteInstructions, agentHome: remoteWorkspace } },
+        executionTarget: {
+          kind: "remote",
+          transport: "computer",
+          providerKey: "e2b",
+          environmentId: "env-1",
+          leaseId: "lease-1",
+          remoteCwd: remoteWorkspace,
+          timeoutMs: 30_000,
+          runner,
+          processRunner: runner,
+          listenerPort: 12345,
+          resourceAuthority: { kind: "computer-owner", computerId: "computer-1", ownerId: "owner-1", generation: 1 },
+          fileAuthority: { kind: "remote-persistent", placementId: "placement-1", root: remoteWorkspace, agentHome: remoteWorkspace },
+          workspaceRealization: { mode: "in_place", authoritativeRoot: remoteWorkspace },
+          launch: async () => ({}),
+          inspectProcess: async () => ({ running: false, claim: null }),
+          retainWarm: async () => {},
+          retire: async () => true,
+          computerTool: { command: "unused", args: [] },
+        },
+        authToken: "run-jwt-token",
+        onLog: async () => {},
+      });
+
+      expect(result.exitCode).toBe(0);
+      const capture = JSON.parse(await fs.readFile(capturePath1, "utf8")) as CapturePayload;
+      expect(capture.argv).toContain("--dangerously-skip-permissions");
+      expect(capture.argv).not.toContain("--allowedTools");
+      expect(capture.claudeConfigDir).toContain(path.join(remoteWorkspace, ".paperclip-runtime", "claude", "owners"));
+      expect(capture.argv.slice(capture.argv.indexOf("--setting-sources"), capture.argv.indexOf("--setting-sources") + 2)).toEqual(["--setting-sources", "user"]);
+      const userSkills = path.join(capture.claudeConfigDir!, "skills");
+      expect(await fs.realpath(userSkills)).toBe(await fs.realpath(path.join(capture.addDir!, ".claude", "skills")));
+      expect(await fs.readFile(path.join(userSkills, "paperclip", "SKILL.md"), "utf8")).toContain("name: paperclip");
+      expect(capture.instructionsContents).toContain("Persistent guidance contents.");
+      expect(capture.claudeConfigEntries).toContain("settings.json");
+      expect(capture.prompt).toContain(remoteInstructions);
+      expect(capture.prompt).toContain(`${path.dirname(remoteInstructions)}/`);
+      expect(capture.prompt).not.toContain(localInstructions);
+      expect(capture.paperclipApiUrl).toMatch(/^http:\/\/127\.0\.0\.1:\d+$/);
+      expect(capture.paperclipApiKey).not.toBe("run-jwt-token");
+      expect(capture.paperclipApiBridgeMode).toBe("queue_v1");
+    } finally {
+      if (previousHome === undefined) delete process.env.HOME;
+      else process.env.HOME = previousHome;
+      if (previousPath === undefined) delete process.env.PATH;
+      else process.env.PATH = previousPath;
+      await fs.rm(root, { recursive: true, force: true });
+    }
+  }, 10_000);
+
   it("omits --effort for sandbox-managed runs when the installed Claude CLI does not advertise it", async () => {
     const root = await fs.mkdtemp(path.join(os.tmpdir(), "paperclip-claude-execute-sandbox-effort-"));
     const { workspace, commandPath, capturePath, restore } = await setupExecuteEnv(root, {
diff --git a/server/src/__tests__/codex-local-execute.test.ts b/server/src/__tests__/codex-local-execute.test.ts
index 29a3a2b2255..265a7d3ef3e 100644
--- a/server/src/__tests__/codex-local-execute.test.ts
+++ b/server/src/__tests__/codex-local-execute.test.ts
@@ -538,6 +538,101 @@ describe("codex execute", () => {
     }
   });
 
+  it("uses registered persistent instruction paths in computer CLI prompts", async () => {
+    const root = await fs.mkdtemp(path.join(os.tmpdir(), "paperclip-codex-execute-sandbox-"));
+    const localWorkspace = path.join(root, "workspace");
+    const remoteWorkspace = path.join(root, "sandbox");
+    const binDir = path.join(root, "bin");
+    const commandPath = path.join(binDir, "codex");
+    const capturePath = path.join(remoteWorkspace, "capture.json");
+    const localInstructions = path.join(localWorkspace, "AGENTS.md");
+    const remoteInstructions = path.join(remoteWorkspace, "nested", "AGENTS.md");
+    const runner = createLocalSandboxRunner();
+    const previousHome = process.env.HOME;
+    const previousPath = process.env.PATH;
+
+    await fs.mkdir(localWorkspace, { recursive: true });
+    await fs.mkdir(remoteWorkspace, { recursive: true });
+    await fs.mkdir(binDir, { recursive: true });
+    await writeFakeCodexCommand(commandPath);
+
+    await fs.writeFile(localInstructions, "Persistent guidance contents.");
+    process.env.HOME = root;
+    process.env.PATH = `${binDir}${path.delimiter}${process.env.PATH ?? ""}`;
+    await seedSharedCodexAuth(root);
+
+    try {
+      const result = await execute({
+        runId: "run-sandbox-auth",
+        agent: {
+          id: "agent-1",
+          companyId: "company-1",
+          name: "Codex Coder",
+          adapterType: "codex_local",
+          adapterConfig: { engine: "cli" },
+        },
+        runtime: {
+          sessionId: null,
+          sessionParams: null,
+          sessionDisplayId: null,
+          taskKey: null,
+        },
+        config: {
+          engine: "cli",
+          command: commandPath,
+          cwd: localWorkspace,
+          instructionsFilePath: localInstructions,
+          env: {
+            PAPERCLIP_TEST_CAPTURE_PATH: capturePath,
+          },
+          promptTemplate: "Follow the paperclip heartbeat.",
+        },
+        context: { paperclipWorkspace: { instructionsFilePath: remoteInstructions, agentHome: remoteWorkspace } },
+        executionTarget: {
+          kind: "remote",
+          transport: "computer",
+          providerKey: "e2b",
+          environmentId: "env-1",
+          leaseId: "lease-1",
+          remoteCwd: remoteWorkspace,
+          timeoutMs: 30_000,
+          runner,
+          processRunner: runner,
+          listenerPort: 12345,
+          resourceAuthority: { kind: "computer-owner", computerId: "computer-1", ownerId: "owner-1", generation: 1 },
+          fileAuthority: { kind: "remote-persistent", placementId: "placement-1", root: remoteWorkspace, agentHome: remoteWorkspace },
+          workspaceRealization: { mode: "in_place", authoritativeRoot: remoteWorkspace },
+          launch: async () => ({}),
+          inspectProcess: async () => ({ running: false, claim: null }),
+          retainWarm: async () => {},
+          retire: async () => true,
+          computerTool: { command: "unused", args: [] },
+        },
+        authToken: "run-jwt-token",
+        onLog: async () => {},
+      });
+
+      expect(result.exitCode).toBe(0);
+      expect(result.errorMessage).toBeNull();
+
+      const capture = JSON.parse(await fs.readFile(capturePath, "utf8")) as CapturePayload;
+      expect(capture.codexHome).toContain(path.join(remoteWorkspace, ".paperclip-runtime", "codex", "owners"));
+      expect(capture.prompt).toContain("Persistent guidance contents.");
+      expect(capture.prompt).toContain(remoteInstructions);
+      expect(capture.prompt).toContain(`${path.dirname(remoteInstructions)}/`);
+      expect(capture.prompt).not.toContain(localInstructions);
+      expect(capture.paperclipApiUrl).toMatch(/^http:\/\/127\.0\.0\.1:\d+$/);
+      expect(capture.paperclipApiKey).not.toBe("run-jwt-token");
+      expect(capture.paperclipApiBridgeMode).toBe("queue_v1");
+    } finally {
+      if (previousHome === undefined) delete process.env.HOME;
+      else process.env.HOME = previousHome;
+      if (previousPath === undefined) delete process.env.PATH;
+      else process.env.PATH = previousPath;
+      await fs.rm(root, { recursive: true, force: true });
+    }
+  });
+
   it.each([false, true])("delivers oversized wake context through stdin (sandbox=%s)", async (sandbox) => {
     const root = await fs.mkdtemp(path.join(os.tmpdir(), "paperclip-codex-execute-wake-"));
     const workspace = path.join(root, "workspace");
diff --git a/server/src/services/heartbeat-github-launchers.test.ts b/server/src/services/heartbeat-github-launchers.test.ts
index 5bb4038bacb..3d5fd005259 100644
--- a/server/src/services/heartbeat-github-launchers.test.ts
+++ b/server/src/services/heartbeat-github-launchers.test.ts
@@ -8,10 +8,11 @@ import type { CommandManagedRuntimeRunner } from "@paperclipai/adapter-utils/com
 import { describe, expect, it, vi } from "vitest";
 import { prepareHeartbeatGitHubLaunchers } from "./heartbeat-github-launchers.js";
 
+const computerTarget = { kind: "remote", transport: "computer", remoteCwd: "/workspace" } as Parameters<typeof prepareHeartbeatGitHubLaunchers>[0]["target"];
 const target = { kind: "remote" as const, transport: "sandbox" as const, providerKey: "daytona", remoteCwd: "/workspace" };
 
 describe("heartbeat GitHub launcher lifetime", () => {
-  it.each([target, null])("defers native managed authorization/staging to the session owner (%j)", async (target) => {
+  it.each([target, computerTarget, null])("defers native managed authorization/staging to the session owner (%j)", async (target) => {
     const prepare = vi.fn();
     const mint = vi.fn();
     const result = await prepareHeartbeatGitHubLaunchers({
@@ -23,7 +24,7 @@ describe("heartbeat GitHub launcher lifetime", () => {
     expect(result.cleanupLocation).toBeNull();
     expect(result.env).toMatchObject({ GH_TOKEN: "", PAPERCLIP_GITHUB_BROKER_TOKEN: "" });
   });
-  it("keeps anonymous native sandbox launchers stable without issuing a run capability", async () => {
+  it.each([target, computerTarget])("keeps anonymous native launchers stable without issuing a run capability (%j)", async (target) => {
     const createBrokerToken = vi.fn(() => "run-secret");
     const prepareLaunchers = vi.fn(async (input) => input.env);
     const inputs = { native: true, githubConfigured: false, agentId: "agent-a", target,
@@ -50,7 +51,7 @@ describe("heartbeat GitHub launcher lifetime", () => {
     expect(cleanupLaunchers).toHaveBeenCalledExactlyOnceWith({ runId: "failed-run", target });
   });
 
-  it("does not remove shared anonymous wrappers when staging a later run fails", async () => {
+  it.each([target, computerTarget])("does not remove shared anonymous wrappers when staging a later run fails (%j)", async (target) => {
     const stagingError = new Error("remote launcher staging failed");
     const cleanupLaunchers = vi.fn(async () => undefined);
     await expect(prepareHeartbeatGitHubLaunchers({
@@ -64,6 +65,7 @@ describe("heartbeat GitHub launcher lifetime", () => {
   it.each([
     { native: false, githubConfigured: true, target },
     { native: false, githubConfigured: false, target },
+    { native: false, githubConfigured: false, target: computerTarget },
     { native: true, githubConfigured: false, target: null },
   ])("preserves run-scoped managed capabilities outside anonymous native sandboxes: %j", async (mode) => {
     const createBrokerToken = vi.fn(() => "current-run-secret");
diff --git a/server/src/services/native-runtime/native-github-access.test.ts b/server/src/services/native-runtime/native-github-access.test.ts
index e6c1aaea539..65f07102e31 100644
--- a/server/src/services/native-runtime/native-github-access.test.ts
+++ b/server/src/services/native-runtime/native-github-access.test.ts
@@ -2,6 +2,7 @@ import { afterEach, expect, it, vi } from "vitest";
 import { spawn, execFile } from "node:child_process";
 import { mkdtemp, mkdir, readFile, rm, writeFile, access } from "node:fs/promises";
 import { promisify } from "node:util";
+import type { AdapterExecutionTarget } from "@paperclipai/adapter-utils/execution-target";
 import type { CommandManagedRuntimeRunner } from "@paperclipai/adapter-utils/command-managed-runtime";
 import { tmpdir } from "node:os";
 import path from "node:path";
@@ -13,7 +14,7 @@ const cleanups: (() => Promise<unknown>)[] = [];
 afterEach(async () => { for (const cleanup of cleanups.splice(0).reverse()) await cleanup(); });
 async function broker(resolveCredentials = vi.fn(async (binding: ReturnType<typeof run>) => ({
   status: "available", env: { GH_TOKEN: `fixture-${binding.runId}` },
-})), remote = false, bridgeUnavailable = false, onLog?: (stream: "stdout" | "stderr", chunk: string) => Promise<void>) {
+})), remote: boolean | "computer" = false, bridgeUnavailable = false, onLog?: (stream: "stdout" | "stderr", chunk: string) => Promise<void>) {
   const root = await mkdtemp(path.join(tmpdir(), "native-github-reuse-"));
   cleanups.push(() => rm(root, { recursive: true, force: true }));
   const bin = path.join(root, "real-bin");
@@ -29,20 +30,42 @@ async function broker(resolveCredentials = vi.fn(async (binding: ReturnType<type
     const result = await child;
     return { ...result, exitCode: 0, signal: null, timedOut: false, pid: null, startedAt };
   };
-  const target = remote ? { kind: "remote" as const, transport: "sandbox" as const, providerKey: "test",
-    remoteCwd: root, runner: { execute }, streamRunLogs: false } : null;
+  let generation = 1;
+  let processLive = true;
+  const processRunner = { execute: vi.fn(async (input: Parameters<typeof execute>[0]) => {
+    if (!processLive) throw new Error("computer_process_claim_stale");
+    return execute(input);
+  }) };
+  const target: AdapterExecutionTarget | null = remote === "computer" ? {
+    kind: "remote", transport: "computer", remoteCwd: root,
+    runner: { execute: async (input: Parameters<typeof execute>[0]) => {
+      if (generation !== 1) throw new Error("computer_attempt_superseded");
+      return execute(input);
+    } }, processRunner,
+    listenerPort: 43127,
+    resourceAuthority: { kind: "computer-owner", computerId: "computer-a", ownerId: "owner-a", generation: 1 },
+    fileAuthority: { kind: "remote-persistent", placementId: "placement-a", root, agentHome: root },
+    launch: async () => { throw new Error("Fixture runner is already launched"); },
+    inspectProcess: async () => ({ running: processLive, claim: { nonce: "fixture-process" } }),
+    retainWarm: async () => undefined,
+    retire: async () => { processLive = false; return true; },
+    computerTool: { command: "fixture-computer-tool", args: [] },
+  } : remote ? {
+    kind: "remote" as const, transport: "sandbox" as const, providerKey: "test",
+    remoteCwd: root, runner: { execute }, streamRunLogs: false,
+  } : null;
   const result = await createNativeGitHubAccess({ scope, target, cwd: root,
     env: { PATH: `${bin}:${path.dirname(process.execPath)}:/usr/bin:/bin`, PAPERCLIP_API_KEY: "old-run-api-key" }, resolveCredentials, onLog },
     bridgeUnavailable ? async () => { throw new Error("fixture bridge unavailable"); } : undefined);
   cleanups.push(result.stop);
-  return { ...result, root, resolveCredentials };
+  return { ...result, root, resolveCredentials, processRunner, advanceGeneration: () => { generation++; }, retireProcess: () => { processLive = false; } };
 }
 function request(broker: NativeGitHubAccess, extra: RequestInit = {}, endpoint = "/runtime-tools/github/credentials") {
   return fetch(broker.env.PAPERCLIP_GITHUB_BROKER_URL + endpoint, {
     method: "POST", body: "{}", headers: { authorization: `Bearer ${broker.env.PAPERCLIP_GITHUB_BRIDGE_TOKEN}`, "content-type": "application/json" }, ...extra,
   });
 }
-it.each([false, true])("keeps one live parent and its original launcher environment across two authorized runs (callback bridge: %s)", async (remote) => {
+it.each([false, true, "computer"] as const)("keeps one live parent and its original launcher environment across two authorized runs (callback bridge: %s)", async (remote) => {
   const b = await broker(undefined, remote);
   const parent = spawn(process.execPath, ["-e", `
     const {execFile}=require('node:child_process');
@@ -61,6 +84,7 @@ it.each([false, true])("keeps one live parent and its original launcher environm
   expect(a.value).toBe("fixture-run-a");
   releaseA();
   expect((await operation()).value).toBe("anonymous");
+  b.advanceGeneration();
   const releaseB = b.activate(run("run-b"));
   releaseA(); // A's delayed cleanup cannot revoke B.
   const second = await operation();
@@ -70,6 +94,11 @@ it.each([false, true])("keeps one live parent and its original launcher environm
   expect(await readFile(path.join(b.env.PAPERCLIP_GITHUB_LAUNCHER_DIR, "gh"), "utf8")).not.toContain(b.env.PAPERCLIP_GITHUB_BROKER_TOKEN);
   releaseB(); await b.stop();
   await expect(access(b.env.PAPERCLIP_GITHUB_LAUNCHER_DIR)).rejects.toThrow();
+  if (remote === "computer") {
+    expect(b.processRunner.execute).toHaveBeenCalled();
+    b.retireProcess();
+    await expect(b.processRunner.execute({ command: "true" })).rejects.toThrow("computer_process_claim_stale");
+  }
 }, 45_000);
 it("rejects other scopes, concurrent bindings, browser requests and forged authority", async () => {
   const b = await broker();
diff --git a/server/src/services/native-runtime/native-session-executor.test.ts b/server/src/services/native-runtime/native-session-executor.test.ts
index 54c94047bf5..b8f7ad47577 100644
--- a/server/src/services/native-runtime/native-session-executor.test.ts
+++ b/server/src/services/native-runtime/native-session-executor.test.ts
@@ -8028,6 +8028,41 @@ describe("native warm session supervision", () => {
       expect(secondCopy.collectStopped).toHaveBeenCalledOnce();
     });
 
+    it.each(["same", "generation", "owner", "computer"])("preserves command-transport directory identity across %s changes", async change => {
+      const name = `managed-computer-identity-${change}`;
+      const current = { ...execution, binding: { ...execution.binding, runId: `${name}-one`, executionWorkspaceId: name },
+        session: { ...execution.session, normalizedSessionId: name, lifecyclePolicy: { mode: "warm", idleTimeoutMs: 60_000 } } } as NativeExecutionInputV1;
+      const close = vi.fn(async () => undefined);
+      const collectStopped = vi.fn(async () => undefined);
+      const target = { kind: "remote", transport: "computer", environmentId: name, remoteCwd: `/tmp/${name}`,
+        resourceAuthority: { kind: "computer-owner", computerId: name, ownerId: name, generation: 1 } };
+      state.execute.mockReset().mockImplementationOnce(async options => { await options.onSession?.({ close }); return result; });
+      await executePaperclipNativeSession({ db: leaseDb(current), execution: current, runnerInstanceId: name,
+        runnerExecutionTarget: target as never,
+        instructionWorkingCopy: { runId: current.binding.runId, root: `/tmp/${name}/home`, collectStopped,
+          checkpointWarm: async () => true, hasChanges: async () => false } });
+      const canReuse = vi.fn(async () => true);
+      const nextAuthority = { ...target.resourceAuthority,
+        ...(change === "generation" ? { generation: 2 } : {}),
+        ...(change === "owner" ? { ownerId: "different-owner" } : {}),
+        ...(change === "computer" ? { computerId: "different-computer" } : {}),
+      };
+      const reservation = await reserveWarmNativeInstructionDirectory({ companyId: current.binding.companyId,
+        agentId: current.binding.agentId, previousRunId: current.binding.runId, runId: `${name}-two`, canReuse,
+        target: { ...target, resourceAuthority: nextAuthority } as never });
+      if (change === "same" || change === "generation") {
+        expect(reservation?.reuseRunId).toBe(current.binding.runId);
+        expect(canReuse).toHaveBeenCalledOnce();
+        expect(close).not.toHaveBeenCalled();
+        await reservation!.release();
+      } else {
+        expect(reservation).toBeNull();
+        expect(canReuse).not.toHaveBeenCalled();
+        expect(close).toHaveBeenCalledOnce();
+        expect(collectStopped).toHaveBeenCalledOnce();
+      }
+    });
+
     it("stops before collecting when a checkpoint cannot stabilize", async () => {
       const f = await start("managed-fallback", false);
       expect(f.close).toHaveBeenCalledOnce();