feat(runner): import verified Linux companions for normal Pi execution

Add explicit public CLI setup and full async source/profile/byte admission for an operator-pinned Linux companion. Preserve existing remote integrity checks and explicit overrides.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

server/src/services/native-runtime/native-session-executor.ts

@@ -21,6 +21,7 @@ import { nativeCompletionFeedback } from "./native-completion-feedback.js";
 import { hasAcknowledgedNativeReassignmentStopIntent, hasAcknowledgedNativeStopIntent } from "../acknowledged-native-stop.js";
 import { stoppedCodexTurnIsTextOnly } from "./stopped-codex-turn.js";
 import { prepareVerifiedRemoteProviderPack } from "./remote-provider-pack.js";
+import { selectRemotePiCompanion } from "./remote-pi-companion.js";
 import { readNativeLocalProcessStop, PROCESS_START_REQUESTED } from "../native-local-process-stop.js";
 import { remoteLeaseCleanupScope } from "../remote-execution-termination.js";
 import { resolveConnectorAssignments, isConnectorSkill } from "../connector-runtime.js";
@@ -10979,8 +10980,16 @@ async function createRunnerdBackendWithinSessionClaim(
     remoteTarget !== null &&
     (input.execution.provider.kind === "opencode" ||
       input.execution.provider.kind === "acpx");
+  // Pi's explicit operator import supplies the target-platform authority. Never
+  // substitute a Mac controller daemon or trust an image's self-reported hashes.
+  // Existing explicit overrides and every other provider keep their old path.
+  const remotePiCompanion = await selectRemotePiCompanion({
+    provider: input.execution.provider, remote: remoteTarget !== null,
+    binaryOverride: input.runnerRemoteBinaryPath, packOverride: input.runnerRemoteProviderPackPath,
+    workspaceRoot: input.execution.workspace.cwd,
+  });
   const configuredProviderPackRoot =
-    input.runnerRemoteProviderPackPath?.trim() || null;
+    input.runnerRemoteProviderPackPath?.trim() || remotePiCompanion?.providerPack || null;
   let expectedProviderPackManifest: RemoteProviderPackManifest | null = null;
   if (requiresRemoteProviderPack) {
     if (
@@ -11009,7 +11018,7 @@ async function createRunnerdBackendWithinSessionClaim(
   // When an explicit remote artifact is configured, prepareRemoteRunner stages
   // these exact bytes at remoteBinary before launch.
   const controllerRunnerBinary = remoteTarget
-    ? input.runnerRemoteBinaryPath?.trim() || resolvePaperclipRunnerBinary()
+    ? input.runnerRemoteBinaryPath?.trim() || remotePiCompanion?.runnerBinary || resolvePaperclipRunnerBinary()
     : resolvePaperclipRunnerBinary();
   const explicitRemoteCodex = input.runnerRemoteCodexPath?.trim() || null;
   const remoteCodexNpmSpec = input.runnerRemoteCodexNpmSpec?.trim() || null;
@@ -11386,7 +11395,7 @@ async function createRunnerdBackendWithinSessionClaim(
       if (!existsSync(sourceBinary)) {
         throw new Error("runner_remote_artifact_unavailable");
       }
-      if (!explicitRemoteBinary) {
+      if (!explicitRemoteBinary && !remotePiCompanion) {
         const platform = await remoteCommandRunner.execute({
           command: "sh",
           args: ["-c", "uname -s; uname -m"],