Add RTK integration for token-optimized command output

When enableRtk is set in adapter config, the adapter:
- Adds an init container (curlimages/curl) to download the RTK binary
- Mounts RTK binary in the main container via shared emptyDir volume
- Runs `rtk install claude-code` before invoking Claude to set up hooks
- Disables RTK telemetry (RTK_NO_TELEMETRY=1) for automated environments
- Supports optional rtkVersion config for pinning specific versions

RTK filters CLI command output before it reaches the LLM context,
reducing token consumption by ~80%.

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

src/server/config-schema.ts

@@ -108,6 +108,20 @@ export function getConfigSchema(): AdapterConfigSchema {
       label: "Memory Limit",
       hint: "Memory limit for Job pods (e.g. 128Mi, 512Mi, 1Gi).",
     },
+    // RTK (token optimization)
+    {
+      type: "toggle",
+      key: "enableRtk",
+      label: "Enable RTK",
+      hint: "Install and enable RTK (rtk-ai/rtk) to reduce token usage by filtering command output. Adds an init container to download the RTK binary.",
+      default: false,
+    },
+    {
+      type: "text",
+      key: "rtkVersion",
+      label: "RTK Version",
+      hint: "RTK version to install. Defaults to 'latest'.",
+    },
     // Scheduling
     {
       type: "textarea",

src/server/job-manifest.test.ts

@@ -497,6 +497,96 @@ describe("buildJobManifest", () => {
     });
   });
 
+  describe("RTK integration", () => {
+    it("does not add RTK init container by default", () => {
+      const { job } = buildJobManifest({ ctx, selfPod });
+      const inits = job.spec?.template?.spec?.initContainers ?? [];
+      expect(inits).toHaveLength(1);
+      expect(inits[0]?.name).toBe("write-prompt");
+    });
+
+    it("adds install-rtk init container when enableRtk is true", () => {
+      ctx.config = { enableRtk: true };
+      const { job } = buildJobManifest({ ctx, selfPod });
+      const inits = job.spec?.template?.spec?.initContainers ?? [];
+      expect(inits).toHaveLength(2);
+      expect(inits[1]?.name).toBe("install-rtk");
+      expect(inits[1]?.image).toBe("curlimages/curl:8.12.1");
+    });
+
+    it("adds rtk-bin emptyDir volume when enableRtk is true", () => {
+      ctx.config = { enableRtk: true };
+      const { job } = buildJobManifest({ ctx, selfPod });
+      const rtkVol = job.spec?.template?.spec?.volumes?.find((v) => v.name === "rtk-bin");
+      expect(rtkVol?.emptyDir).toEqual({});
+    });
+
+    it("mounts rtk-bin in main container when enableRtk is true", () => {
+      ctx.config = { enableRtk: true };
+      const { job } = buildJobManifest({ ctx, selfPod });
+      const rtkMount = job.spec?.template?.spec?.containers[0]?.volumeMounts?.find(
+        (vm) => vm.name === "rtk-bin",
+      );
+      expect(rtkMount?.mountPath).toBe("/tmp/rtk-bin");
+    });
+
+    it("prepends rtk setup to main command when enableRtk is true", () => {
+      ctx.config = { enableRtk: true };
+      const { job } = buildJobManifest({ ctx, selfPod });
+      const command = job.spec?.template?.spec?.containers[0]?.command;
+      expect(command?.[2]).toContain("export PATH=\"/tmp/rtk-bin:$PATH\"");
+      expect(command?.[2]).toContain("rtk install claude-code");
+      expect(command?.[2]).toContain("cat /tmp/prompt/prompt.txt | claude");
+    });
+
+    it("does not prepend rtk setup when enableRtk is false", () => {
+      ctx.config = { enableRtk: false };
+      const { job } = buildJobManifest({ ctx, selfPod });
+      const command = job.spec?.template?.spec?.containers[0]?.command;
+      expect(command?.[2]).not.toContain("rtk");
+      expect(command?.[2]).toMatch(/^cat \/tmp\/prompt\/prompt\.txt/);
+    });
+
+    it("does not add rtk-bin volume when enableRtk is false", () => {
+      ctx.config = { enableRtk: false };
+      const { job } = buildJobManifest({ ctx, selfPod });
+      expect(job.spec?.template?.spec?.volumes?.find((v) => v.name === "rtk-bin")).toBeUndefined();
+    });
+
+    it("sets RTK_NO_TELEMETRY env var when enableRtk is true", () => {
+      ctx.config = { enableRtk: true };
+      const { job } = buildJobManifest({ ctx, selfPod });
+      const rtkTelemetry = job.spec?.template?.spec?.containers[0]?.env?.find(
+        (e) => e.name === "RTK_NO_TELEMETRY",
+      );
+      expect(rtkTelemetry?.value).toBe("1");
+    });
+
+    it("does not set RTK_NO_TELEMETRY when enableRtk is false", () => {
+      const { job } = buildJobManifest({ ctx, selfPod });
+      const rtkTelemetry = job.spec?.template?.spec?.containers[0]?.env?.find(
+        (e) => e.name === "RTK_NO_TELEMETRY",
+      );
+      expect(rtkTelemetry).toBeUndefined();
+    });
+
+    it("uses custom rtkVersion in install command", () => {
+      ctx.config = { enableRtk: true, rtkVersion: "0.5.0" };
+      const { job } = buildJobManifest({ ctx, selfPod });
+      const inits = job.spec?.template?.spec?.initContainers ?? [];
+      const rtkInit = inits.find((c) => c.name === "install-rtk");
+      expect(rtkInit?.command?.[2]).toContain("RTK_VERSION=0.5.0");
+    });
+
+    it("mounts rtk-bin in install-rtk init container", () => {
+      ctx.config = { enableRtk: true };
+      const { job } = buildJobManifest({ ctx, selfPod });
+      const inits = job.spec?.template?.spec?.initContainers ?? [];
+      const rtkInit = inits.find((c) => c.name === "install-rtk");
+      expect(rtkInit?.volumeMounts).toContainEqual({ name: "rtk-bin", mountPath: "/tmp/rtk-bin" });
+    });
+  });
+
   describe("return value", () => {
     it("returns job, jobName, namespace, prompt, claudeArgs, promptMetrics", () => {
       const result = buildJobManifest({ ctx, selfPod });

src/server/job-manifest.ts

@@ -148,6 +148,10 @@ function buildEnvVars(
   // HOME must be /paperclip to match PVC mount and enable session resume
   merged.HOME = "/paperclip";
 
+  if (asBoolean(config.enableRtk, false)) {
+    merged.RTK_NO_TELEMETRY = "1";
+  }
+
   // Convert to V1EnvVar array
   const envVars: k8s.V1EnvVar[] = Object.entries(merged).map(([name, value]) => ({
     name,
@@ -171,6 +175,8 @@ export function buildJobManifest(input: JobBuildInput): JobBuildResult {
   // K8s Job pods are always unattended — no one to approve permission prompts
   const dangerouslySkipPermissions = asBoolean(config.dangerouslySkipPermissions, true);
   const extraArgs = asStringArray(config.extraArgs);
+  const enableRtk = asBoolean(config.enableRtk, false);
+  const rtkVersion = asString(config.rtkVersion, "latest");
   const timeoutSec = asNumber(config.timeoutSec, 0);
   const ttlSeconds = asNumber(config.ttlSecondsAfterFinished, 300);
   const resources = parseObject(config.resources);
@@ -282,6 +288,11 @@ export function buildJobManifest(input: JobBuildInput): JobBuildResult {
     },
   ];
 
+  if (enableRtk) {
+    volumes.push({ name: "rtk-bin", emptyDir: {} });
+    volumeMounts.push({ name: "rtk-bin", mountPath: "/tmp/rtk-bin" });
+  }
+
   // Mount shared PVC for /paperclip (session state, workspaces, data)
   if (selfPod.pvcClaimName) {
     volumes.push({
@@ -326,7 +337,10 @@ export function buildJobManifest(input: JobBuildInput): JobBuildResult {
 
   // Build the claude command string for the main container
   const claudeArgsEscaped = claudeArgs.map((a) => `'${a.replace(/'/g, "'\\''")}'`).join(" ");
-  const mainCommand = `cat /tmp/prompt/prompt.txt | claude ${claudeArgsEscaped}`;
+  const claudeCommand = `cat /tmp/prompt/prompt.txt | claude ${claudeArgsEscaped}`;
+  const mainCommand = enableRtk
+    ? `export PATH="/tmp/rtk-bin:$PATH" && rtk install claude-code && ${claudeCommand}`
+    : claudeCommand;
 
   const job: k8s.V1Job = {
     apiVersion: "batch/v1",
@@ -368,6 +382,28 @@ export function buildJobManifest(input: JobBuildInput): JobBuildResult {
                 limits: { cpu: "100m", memory: "64Mi" },
               },
             },
+            ...(enableRtk
+              ? [
+                  {
+                    name: "install-rtk",
+                    image: "curlimages/curl:8.12.1",
+                    imagePullPolicy: "IfNotPresent" as const,
+                    command: [
+                      "sh",
+                      "-c",
+                      rtkVersion === "latest"
+                        ? "curl -fsSL https://raw.githubusercontent.com/rtk-ai/rtk/refs/heads/master/install.sh | RTK_INSTALL_DIR=/tmp/rtk-bin sh"
+                        : `curl -fsSL https://raw.githubusercontent.com/rtk-ai/rtk/refs/heads/master/install.sh | RTK_INSTALL_DIR=/tmp/rtk-bin RTK_VERSION=${rtkVersion} sh`,
+                    ],
+                    volumeMounts: [{ name: "rtk-bin", mountPath: "/tmp/rtk-bin" }],
+                    securityContext,
+                    resources: {
+                      requests: { cpu: "10m", memory: "32Mi" },
+                      limits: { cpu: "200m", memory: "128Mi" },
+                    },
+                  },
+                ]
+              : []),
           ],
           containers: [
             {