diff --git a/src/lib/local-inference.test.ts b/src/lib/local-inference.test.ts
index f01c2b10322..76a916d00a1 100644
--- a/src/lib/local-inference.test.ts
+++ b/src/lib/local-inference.test.ts
@@ -48,25 +48,25 @@ describe("local inference helpers", () => {
   });
 
   it("returns the expected validation URL for vllm-local", () => {
-    expect(getLocalProviderValidationBaseUrl("vllm-local")).toBe("http://localhost:8000/v1");
+    expect(getLocalProviderValidationBaseUrl("vllm-local")).toBe("http://127.0.0.1:8000/v1");
   });
 
   it("returns the expected health check command for ollama-local", () => {
     expect(getLocalProviderHealthEndpoint("ollama-local")).toBe(
-      "http://localhost:11434/api/tags",
+      "http://127.0.0.1:11434/api/tags",
     );
     expect(getLocalProviderLabel("ollama-local")).toBe("Local Ollama");
     expect(getLocalProviderHealthCheck("ollama-local")).toEqual(
-      ["curl", "-sf", "http://localhost:11434/api/tags"],
+      ["curl", "-sf", "http://127.0.0.1:11434/api/tags"],
     );
   });
 
   it("returns the expected validation and health check commands for vllm-local", () => {
-    expect(getLocalProviderValidationBaseUrl("ollama-local")).toBe("http://localhost:11434/v1");
-    expect(getLocalProviderHealthEndpoint("vllm-local")).toBe("http://localhost:8000/v1/models");
+    expect(getLocalProviderValidationBaseUrl("ollama-local")).toBe("http://127.0.0.1:11434/v1");
+    expect(getLocalProviderHealthEndpoint("vllm-local")).toBe("http://127.0.0.1:8000/v1/models");
     expect(getLocalProviderLabel("vllm-local")).toBe("Local vLLM");
     expect(getLocalProviderHealthCheck("vllm-local")).toEqual(
-      ["curl", "-sf", "http://localhost:8000/v1/models"],
+      ["curl", "-sf", "http://127.0.0.1:8000/v1/models"],
     );
     expect(getLocalProviderContainerReachabilityCheck("vllm-local")).toEqual([
       "docker", "run", "--rm",
@@ -99,7 +99,7 @@ describe("local inference helpers", () => {
   it("returns a clear error when ollama-local is unavailable", () => {
     const result = validateLocalProvider("ollama-local", () => "");
     expect(result.ok).toBe(false);
-    expect(result.message).toMatch(/http:\/\/localhost:11434/);
+    expect(result.message).toMatch(/http:\/\/127.0.0.1:11434/);
   });
 
   it("returns a clear error when ollama-local is not reachable from containers", () => {
@@ -117,7 +117,7 @@ describe("local inference helpers", () => {
   it("returns a clear error when vllm-local is unavailable", () => {
     const result = validateLocalProvider("vllm-local", () => "");
     expect(result.ok).toBe(false);
-    expect(result.message).toMatch(/http:\/\/localhost:8000/);
+    expect(result.message).toMatch(/http:\/\/127.0.0.1:8000/);
   });
 
   it("probes local provider health successfully", () => {
@@ -135,8 +135,8 @@ describe("local inference helpers", () => {
     expect(result).toEqual({
       ok: true,
       providerLabel: "Local Ollama",
-      endpoint: "http://localhost:11434/api/tags",
-      detail: "Local Ollama is reachable on http://localhost:11434/api/tags.",
+      endpoint: "http://127.0.0.1:11434/api/tags",
+      detail: "Local Ollama is reachable on http://127.0.0.1:11434/api/tags.",
     });
   });
 
@@ -155,7 +155,7 @@ describe("local inference helpers", () => {
     expect(result?.ok).toBe(false);
     expect(result?.detail).toContain("Local Ollama is selected for inference");
     expect(result?.detail).toContain("Start Ollama and retry");
-    expect(result?.detail).toContain("http://localhost:11434/api/tags");
+    expect(result?.detail).toContain("http://127.0.0.1:11434/api/tags");
   });
 
   it("returns null when provider health probing is not supported", () => {
@@ -267,7 +267,7 @@ describe("local inference helpers", () => {
   it("builds a background warmup command for ollama models", () => {
     const command = getOllamaWarmupCommand("nemotron-3-nano:30b");
     expect(command).toEqual(expect.arrayContaining(["bash", "-c"]));
-    expect(command[2]).toMatch(/^nohup curl -s http:\/\/localhost:11434\/api\/generate /);
+    expect(command[2]).toMatch(/^nohup curl -s http:\/\/127.0.0.1:11434\/api\/generate /);
     expect(command[2]).toMatch(/"model":"nemotron-3-nano:30b"/);
     expect(command[2]).toMatch(/"keep_alive":"15m"/);
   });
@@ -288,7 +288,7 @@ describe("local inference helpers", () => {
     expect(command).toContain("-sS");
     expect(command).toContain("--max-time");
     expect(command).toContain("120");
-    expect(command).toContain("http://localhost:11434/api/generate");
+    expect(command).toContain("http://127.0.0.1:11434/api/generate");
     const payload = command[command.length - 1];
     expect(payload).toMatch(/"model":"nemotron-3-nano:30b"/);
   });
diff --git a/src/lib/local-inference.ts b/src/lib/local-inference.ts
index 9c0a4b2c9bd..98f03310595 100644
--- a/src/lib/local-inference.ts
+++ b/src/lib/local-inference.ts
@@ -63,9 +63,9 @@ export function getLocalProviderBaseUrl(provider: string): string | null {
 export function getLocalProviderValidationBaseUrl(provider: string): string | null {
   switch (provider) {
     case "vllm-local":
-      return `http://localhost:${VLLM_PORT}/v1`;
+      return `http://127.0.0.1:${VLLM_PORT}/v1`;
     case "ollama-local":
-      return `http://localhost:${OLLAMA_PORT}/v1`;
+      return `http://127.0.0.1:${OLLAMA_PORT}/v1`;
     default:
       return null;
   }
@@ -74,9 +74,9 @@ export function getLocalProviderValidationBaseUrl(provider: string): string | nu
 export function getLocalProviderHealthEndpoint(provider: string): string | null {
   switch (provider) {
     case "vllm-local":
-      return `http://localhost:${VLLM_PORT}/v1/models`;
+      return `http://127.0.0.1:${VLLM_PORT}/v1/models`;
     case "ollama-local":
-      return `http://localhost:${OLLAMA_PORT}/api/tags`;
+      return `http://127.0.0.1:${OLLAMA_PORT}/api/tags`;
     default:
       return null;
   }
@@ -192,13 +192,13 @@ export function validateLocalProvider(
       case "vllm-local":
         return {
           ok: false,
-          message: `Local vLLM was selected, but nothing is responding on http://localhost:${VLLM_PORT}.`,
+          message: `Local vLLM was selected, but nothing is responding on http://127.0.0.1:${VLLM_PORT}.`,
         };
       case "ollama-local":
         return {
           ok: false,
           message:
-            `Local Ollama was selected, but nothing is responding on http://localhost:${OLLAMA_PORT}.`,
+            `Local Ollama was selected, but nothing is responding on http://127.0.0.1:${OLLAMA_PORT}.`,
         };
       default:
         return { ok: false, message: "The selected local inference provider is unavailable." };
@@ -220,13 +220,13 @@ export function validateLocalProvider(
       return {
         ok: false,
         message:
-          `Local vLLM is responding on localhost, but containers cannot reach http://host.openshell.internal:${VLLM_PORT}. Ensure the server is reachable from containers, not only from the host shell.`,
+          `Local vLLM is responding on 127.0.0.1, but containers cannot reach http://host.openshell.internal:${VLLM_PORT}. Ensure the server is reachable from containers, not only from the host shell.`,
       };
     case "ollama-local":
       return {
         ok: false,
         message:
-          `Local Ollama is responding on localhost, but containers cannot reach the auth proxy at http://host.openshell.internal:${OLLAMA_CONTAINER_PORT}. Ensure the Ollama auth proxy is running.`,
+          `Local Ollama is responding on 127.0.0.1, but containers cannot reach the auth proxy at http://host.openshell.internal:${OLLAMA_CONTAINER_PORT}. Ensure the Ollama auth proxy is running.`,
       };
     default:
       return {
@@ -259,7 +259,7 @@ export function parseOllamaTags(output: unknown): string[] {
 
 export function getOllamaModelOptions(runCaptureImpl?: RunCaptureFn): string[] {
   const capture = runCaptureImpl ?? runCapture;
-  const tagsOutput = capture(["curl", "-sf", `http://localhost:${OLLAMA_PORT}/api/tags`], {
+  const tagsOutput = capture(["curl", "-sf", `http://127.0.0.1:${OLLAMA_PORT}/api/tags`], {
     ignoreError: true,
   });
   const tagsParsed = parseOllamaTags(tagsOutput);
@@ -304,7 +304,7 @@ export function getOllamaWarmupCommand(model: string, keepAlive = "15m"): string
   // names is not feasible. This is the one intentional bash -c exception.
   return [
     "bash", "-c",
-    `nohup curl -s http://localhost:${OLLAMA_PORT}/api/generate -H 'Content-Type: application/json' -d ${shellQuote(payload)} >/dev/null 2>&1 &`,
+    `nohup curl -s http://127.0.0.1:${OLLAMA_PORT}/api/generate -H 'Content-Type: application/json' -d ${shellQuote(payload)} >/dev/null 2>&1 &`,
   ];
 }
 
@@ -322,7 +322,7 @@ export function getOllamaProbeCommand(
   return [
     "curl", "-sS",
     "--max-time", String(timeoutSeconds),
-    `http://localhost:${OLLAMA_PORT}/api/generate`,
+    `http://127.0.0.1:${OLLAMA_PORT}/api/generate`,
     "-H", "Content-Type: application/json",
     "-d", payload,
   ];
diff --git a/src/lib/nim.test.ts b/src/lib/nim.test.ts
index 85edca72308..fa251765334 100644
--- a/src/lib/nim.test.ts
+++ b/src/lib/nim.test.ts
@@ -186,7 +186,7 @@ describe("nim", () => {
       const runCapture = vi.fn((cmd: string | string[]) => {
         if (!Array.isArray(cmd)) throw new Error("expected argv array");
         if (cmd[0] === "docker" && cmd.includes("inspect")) return "running";
-        if (cmd[0] === "curl" && hasArg(cmd, "http://localhost:9000/v1/models")) return '{"data":[]}';
+        if (cmd[0] === "curl" && hasArg(cmd, "http://127.0.0.1:9000/v1/models")) return '{"data":[]}';
         return "";
       });
       const { nimModule, restore } = loadNimWithMockedRunner(runCapture);
@@ -202,7 +202,7 @@ describe("nim", () => {
           state: "running",
         });
         expect(commands.some((c) => c[0] === "docker" && c.includes("port"))).toBe(false);
-        expect(commands.some((c) => c.includes("http://localhost:9000/v1/models"))).toBe(
+        expect(commands.some((c) => c.includes("http://127.0.0.1:9000/v1/models"))).toBe(
           true,
         );
       } finally {
@@ -216,7 +216,7 @@ describe("nim", () => {
           if (!Array.isArray(cmd)) throw new Error("expected argv array");
           if (cmd[0] === "docker" && cmd.includes("inspect")) return "running";
           if (cmd[0] === "docker" && cmd.includes("port")) return mapping;
-          if (cmd[0] === "curl" && hasArg(cmd, "http://localhost:9000/v1/models")) return '{"data":[]}';
+          if (cmd[0] === "curl" && hasArg(cmd, "http://127.0.0.1:9000/v1/models")) return '{"data":[]}';
           return "";
         });
         const { nimModule, restore } = loadNimWithMockedRunner(runCapture);
@@ -238,7 +238,7 @@ describe("nim", () => {
         if (!Array.isArray(cmd)) throw new Error("expected argv array");
         if (cmd[0] === "docker" && cmd.includes("inspect")) return "running";
         if (cmd[0] === "docker" && cmd.includes("port")) return "";
-        if (cmd[0] === "curl" && hasArg(cmd, "http://localhost:8000/v1/models")) return '{"data":[]}';
+        if (cmd[0] === "curl" && hasArg(cmd, "http://127.0.0.1:8000/v1/models")) return '{"data":[]}';
         return "";
       });
       const { nimModule, restore } = loadNimWithMockedRunner(runCapture);
diff --git a/src/lib/nim.ts b/src/lib/nim.ts
index 03f17f4ba24..d30db81fa42 100644
--- a/src/lib/nim.ts
+++ b/src/lib/nim.ts
@@ -220,7 +220,7 @@ export function waitForNimHealth(port = VLLM_PORT, timeout = 300): boolean {
 
   while ((Date.now() - start) / 1000 < timeout) {
     try {
-      const result = runCapture(["curl", "-sf", `http://localhost:${hostPort}/v1/models`], {
+      const result = runCapture(["curl", "-sf", `http://127.0.0.1:${hostPort}/v1/models`], {
         ignoreError: true,
       });
       if (result) {
@@ -272,7 +272,7 @@ export function nimStatusByName(name: string, port?: number): NimStatus {
         resolvedHostPort = m ? Number(m[1]) : VLLM_PORT;
       }
       const health = runCapture(
-        ["curl", "-sf", `http://localhost:${resolvedHostPort}/v1/models`],
+        ["curl", "-sf", `http://127.0.0.1:${resolvedHostPort}/v1/models`],
         { ignoreError: true },
       );
       healthy = !!health;
diff --git a/src/lib/onboard.ts b/src/lib/onboard.ts
index 885d5dbf400..8f61f93b242 100644
--- a/src/lib/onboard.ts
+++ b/src/lib/onboard.ts
@@ -3243,12 +3243,12 @@ async function setupNim(gpu) {
   // Detect local inference options
   const hasOllama = !!runCapture("command -v ollama", { ignoreError: true });
   const ollamaRunning = !!runCapture(
-    `curl -sf http://localhost:${OLLAMA_PORT}/api/tags 2>/dev/null`,
+    `curl -sf http://127.0.0.1:${OLLAMA_PORT}/api/tags 2>/dev/null`,
     {
       ignoreError: true,
     },
   );
-  const vllmRunning = !!runCapture(`curl -sf http://localhost:${VLLM_PORT}/v1/models 2>/dev/null`, {
+  const vllmRunning = !!runCapture(`curl -sf http://127.0.0.1:${VLLM_PORT}/v1/models 2>/dev/null`, {
     ignoreError: true,
   });
   const requestedProvider = isNonInteractive() ? getNonInteractiveProvider() : null;
@@ -3821,7 +3821,7 @@ async function setupNim(gpu) {
         endpointUrl = getLocalProviderBaseUrl(provider);
         // Query vLLM for the actual model ID
         const vllmModelsRaw = runCapture(
-          `curl -sf http://localhost:${VLLM_PORT}/v1/models 2>/dev/null`,
+          `curl -sf http://127.0.0.1:${VLLM_PORT}/v1/models 2>/dev/null`,
           {
             ignoreError: true,
           },
diff --git a/test/cli.test.ts b/test/cli.test.ts
index c15ab40117f..e3151a37b21 100644
--- a/test/cli.test.ts
+++ b/test/cli.test.ts
@@ -1674,7 +1674,7 @@ describe("CLI dispatch", () => {
     expect(r.out).toContain("Inference:");
     expect(r.out).toContain("unreachable");
     expect(r.out).toContain("Start Ollama and retry");
-    expect(r.out).toContain("http://localhost:11434/api/tags");
+    expect(r.out).toContain("http://127.0.0.1:11434/api/tags");
   });
 
   it("does not treat a different connected gateway as a healthy nemoclaw gateway", () => {
diff --git a/test/e2e/test-gpu-e2e.sh b/test/e2e/test-gpu-e2e.sh
index 0d48026fd6a..6794dba836c 100755
--- a/test/e2e/test-gpu-e2e.sh
+++ b/test/e2e/test-gpu-e2e.sh
@@ -161,7 +161,7 @@ if [ "${NEMOCLAW_ACCEPT_THIRD_PARTY_SOFTWARE:-}" != "1" ]; then
 fi
 
 # Verify port 11434 is free (onboard needs to start Ollama on 127.0.0.1:11434)
-if curl -sf http://localhost:11434/api/tags >/dev/null 2>&1; then
+if curl -sf http://127.0.0.1:11434/api/tags >/dev/null 2>&1; then
   info "WARNING: Something is already listening on port 11434."
   info "Onboard may not be able to start Ollama."
   info "On ephemeral runners this should not happen."
@@ -189,7 +189,7 @@ fi
 # If the Ollama installer started a system service, stop it so onboard
 # can start Ollama with OLLAMA_HOST=0.0.0.0:11434 (required for containers).
 # This needs the ollama process to be owned by our user, or systemctl access.
-if curl -sf http://localhost:11434/api/tags >/dev/null 2>&1; then
+if curl -sf http://127.0.0.1:11434/api/tags >/dev/null 2>&1; then
   info "Ollama service is running — attempting to stop for clean onboard..."
   # Try systemctl first (works if user has permissions)
   systemctl --user stop ollama 2>/dev/null || true
@@ -198,7 +198,7 @@ if curl -sf http://localhost:11434/api/tags >/dev/null 2>&1; then
   pkill -f "ollama serve" 2>/dev/null || true
   sleep 2
 
-  if curl -sf http://localhost:11434/api/tags >/dev/null 2>&1; then
+  if curl -sf http://127.0.0.1:11434/api/tags >/dev/null 2>&1; then
     info "Could not stop existing Ollama — onboard will use it as-is"
   else
     pass "Existing Ollama stopped — port 11434 is free for onboard"
@@ -288,8 +288,8 @@ else
 fi
 
 # 4d: Ollama is running and reachable
-if curl -sf http://localhost:11434/api/tags >/dev/null 2>&1; then
-  pass "Ollama running on localhost:11434 (started by onboard)"
+if curl -sf http://127.0.0.1:11434/api/tags >/dev/null 2>&1; then
+  pass "Ollama running on 127.0.0.1:11434 (started by onboard)"
 else
   fail "Ollama not running — onboard should have started it"
 fi
@@ -415,7 +415,7 @@ section "Phase 5: Local inference through sandbox"
 CONFIGURED_MODEL="${NEMOCLAW_MODEL:-}"
 if [ -n "$CONFIGURED_MODEL" ]; then
   # Verify the expected model is actually available in Ollama
-  if curl -sf http://localhost:11434/api/tags 2>/dev/null \
+  if curl -sf http://127.0.0.1:11434/api/tags 2>/dev/null \
     | python3 -c "import json,sys; m=[x['name'] for x in json.load(sys.stdin).get('models',[])]; sys.exit(0 if '$CONFIGURED_MODEL' in m or any('$CONFIGURED_MODEL' in x for x in m) else 1)" 2>/dev/null; then
     info "Using NEMOCLAW_MODEL: $CONFIGURED_MODEL (confirmed in Ollama)"
   else
@@ -424,7 +424,7 @@ if [ -n "$CONFIGURED_MODEL" ]; then
   fi
 fi
 if [ -z "$CONFIGURED_MODEL" ]; then
-  CONFIGURED_MODEL=$(curl -sf http://localhost:11434/api/tags 2>/dev/null \
+  CONFIGURED_MODEL=$(curl -sf http://127.0.0.1:11434/api/tags 2>/dev/null \
     | python3 -c "import json,sys; m=json.load(sys.stdin).get('models',[]); print(m[0]['name'] if m else '')" 2>/dev/null || echo "")
   if [ -n "$CONFIGURED_MODEL" ]; then
     info "Auto-detected Ollama model: $CONFIGURED_MODEL"
@@ -434,9 +434,9 @@ if [ -z "$CONFIGURED_MODEL" ]; then
 fi
 
 # 5a: Direct Ollama inference (host-side, OpenAI-compatible)
-info "[LOCAL] Direct Ollama test → localhost:11434/v1/chat/completions..."
+info "[LOCAL] Direct Ollama test → 127.0.0.1:11434/v1/chat/completions..."
 direct_response=$(curl -s --max-time 120 \
-  -X POST http://localhost:11434/v1/chat/completions \
+  -X POST http://127.0.0.1:11434/v1/chat/completions \
   -H "Content-Type: application/json" \
   -d "{
     \"model\": \"$CONFIGURED_MODEL\",
@@ -550,7 +550,7 @@ echo "  What this tested (real user flow):"
 echo "    - GPU detection (nvidia-smi)"
 echo "    - Ollama binary install"
 echo "    - install.sh --non-interactive with NEMOCLAW_PROVIDER=ollama"
-echo "    - Onboard: starts Ollama on localhost, starts auth proxy, pulls model, creates sandbox"
+echo "    - Onboard: starts Ollama on 127.0.0.1, starts auth proxy, pulls model, creates sandbox"
 echo "    - Auth proxy: token persistence, auth reject/accept, container reachability, recovery"
 echo "    - Local inference: direct + sandbox → gateway → auth proxy → Ollama on GPU"
 echo "    - Destroy + uninstall --delete-models"
diff --git a/test/onboard-selection.test.ts b/test/onboard-selection.test.ts
index f80e29e4be3..3a647e4c091 100644
--- a/test/onboard-selection.test.ts
+++ b/test/onboard-selection.test.ts
@@ -136,9 +136,9 @@ runner.runCapture = (command) => {
   // Once onboard.ts is migrated to argv (#1889), these mocks can assert Array.isArray.
   const cmd = Array.isArray(command) ? command.join(" ") : command;
   if (cmd.includes("command -v ollama")) return "/usr/bin/ollama";
-  if (cmd.includes("localhost:11434/api/tags")) return JSON.stringify({ models: [{ name: "nemotron-3-nano:30b" }] });
+  if (cmd.includes("127.0.0.1:11434/api/tags")) return JSON.stringify({ models: [{ name: "nemotron-3-nano:30b" }] });
   if (cmd.includes("ollama list")) return "nemotron-3-nano:30b  abc  24 GB  now\\nqwen3:32b  def  20 GB  now";
-  if (cmd.includes("localhost:8000/v1/models")) return "";
+  if (cmd.includes("127.0.0.1:8000/v1/models")) return "";
   return "";
 };
 registry.updateSandbox = (_name, update) => updates.push(update);
@@ -312,8 +312,8 @@ runner.runCapture = (command) => {
   // Once onboard.ts is migrated to argv (#1889), these mocks can assert Array.isArray.
   const cmd = Array.isArray(command) ? command.join(" ") : command;
   if (cmd.includes("command -v ollama")) return "";
-  if (cmd.includes("localhost:11434/api/tags")) return "";
-  if (cmd.includes("localhost:8000/v1/models")) return "";
+  if (cmd.includes("127.0.0.1:11434/api/tags")) return "";
+  if (cmd.includes("127.0.0.1:8000/v1/models")) return "";
   return "";
 };
 
@@ -408,8 +408,8 @@ runner.runCapture = (command) => {
   // Once onboard.ts is migrated to argv (#1889), these mocks can assert Array.isArray.
   const cmd = Array.isArray(command) ? command.join(" ") : command;
   if (cmd.includes("command -v ollama")) return "";
-  if (cmd.includes("localhost:11434/api/tags")) return "";
-  if (cmd.includes("localhost:8000/v1/models")) return "";
+  if (cmd.includes("127.0.0.1:11434/api/tags")) return "";
+  if (cmd.includes("127.0.0.1:8000/v1/models")) return "";
   return "";
 };
 
@@ -550,7 +550,7 @@ const { setupNim } = require(${onboardPath});
     assert.ok(payload.lines.some((line) => line.includes("Chat Completions API available")));
   });
 
-  it("warms and validates Ollama via localhost before moving on", () => {
+  it("warms and validates Ollama via 127.0.0.1 before moving on", () => {
     const repoRoot = path.join(import.meta.dirname, "..");
     const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), "nemoclaw-onboard-ollama-validation-"));
     const fakeBin = path.join(tmpDir, "bin");
@@ -600,9 +600,9 @@ runner.runCapture = (command) => {
   // Once onboard.ts is migrated to argv (#1889), these mocks can assert Array.isArray.
   const cmd = Array.isArray(command) ? command.join(" ") : command;
   if (cmd.includes("command -v ollama")) return "/usr/bin/ollama";
-  if (cmd.includes("localhost:11434/api/tags")) return JSON.stringify({ models: [{ name: "nemotron-3-nano:30b" }] });
+  if (cmd.includes("127.0.0.1:11434/api/tags")) return JSON.stringify({ models: [{ name: "nemotron-3-nano:30b" }] });
   if (cmd.includes("ollama list")) return "nemotron-3-nano:30b  abc  24 GB  now";
-  if (cmd.includes("localhost:8000/v1/models")) return "";
+  if (cmd.includes("127.0.0.1:8000/v1/models")) return "";
   if (cmd.includes("api/generate")) return '{"response":"hello"}';
   return "";
 };
@@ -647,7 +647,7 @@ const { setupNim } = require(${onboardPath});
       payload.lines.some((line) => line.includes("Loading Ollama model: nemotron-3-nano:30b")),
     );
     assert.ok(
-      payload.commands.some((command) => command.includes("http://localhost:11434/api/generate")),
+      payload.commands.some((command) => command.includes("http://127.0.0.1:11434/api/generate")),
     );
   });
 
@@ -697,9 +697,9 @@ runner.runCapture = (command) => {
   // Once onboard.ts is migrated to argv (#1889), these mocks can assert Array.isArray.
   const cmd = Array.isArray(command) ? command.join(" ") : command;
   if (cmd.includes("command -v ollama")) return "/usr/bin/ollama";
-  if (cmd.includes("localhost:11434/api/tags")) return JSON.stringify({ models: [{ name: "nemotron-3-nano:30b" }] });
+  if (cmd.includes("127.0.0.1:11434/api/tags")) return JSON.stringify({ models: [{ name: "nemotron-3-nano:30b" }] });
   if (cmd.includes("ollama list")) return "nemotron-3-nano:30b  abc  24 GB  now";
-  if (cmd.includes("localhost:8000/v1/models")) return "";
+  if (cmd.includes("127.0.0.1:8000/v1/models")) return "";
   if (cmd.includes("api/generate")) return '{"response":"hello"}';
   return "";
 };
@@ -800,9 +800,9 @@ runner.runCapture = (command) => {
   // Once onboard.ts is migrated to argv (#1889), these mocks can assert Array.isArray.
   const cmd = Array.isArray(command) ? command.join(" ") : command;
   if (cmd.includes("command -v ollama")) return "/usr/bin/ollama";
-  if (cmd.includes("localhost:11434/api/tags")) return JSON.stringify({ models: [] });
+  if (cmd.includes("127.0.0.1:11434/api/tags")) return JSON.stringify({ models: [] });
   if (cmd.includes("ollama list")) return "";
-  if (cmd.includes("localhost:8000/v1/models")) return "";
+  if (cmd.includes("127.0.0.1:8000/v1/models")) return "";
   if (cmd.includes("api/generate")) return '{"response":"hello"}';
   return "";
 };
@@ -910,9 +910,9 @@ runner.runCapture = (command) => {
   // Once onboard.ts is migrated to argv (#1889), these mocks can assert Array.isArray.
   const cmd = Array.isArray(command) ? command.join(" ") : command;
   if (cmd.includes("command -v ollama")) return "/usr/bin/ollama";
-  if (cmd.includes("localhost:11434/api/tags")) return JSON.stringify({ models: [] });
+  if (cmd.includes("127.0.0.1:11434/api/tags")) return JSON.stringify({ models: [] });
   if (cmd.includes("ollama list")) return "";
-  if (cmd.includes("localhost:8000/v1/models")) return "";
+  if (cmd.includes("127.0.0.1:8000/v1/models")) return "";
   if (cmd.includes("api/generate")) return '{"response":"hello"}';
   return "";
 };
@@ -2750,8 +2750,8 @@ runner.runCapture = (command) => {
   // Once onboard.ts is migrated to argv (#1889), these mocks can assert Array.isArray.
   const cmd = Array.isArray(command) ? command.join(" ") : command;
   if (cmd.includes("command -v ollama")) return "";
-  if (cmd.includes("localhost:11434")) return "";
-  if (cmd.includes("localhost:8000/v1/models")) return JSON.stringify({ data: [{ id: "meta-llama/Llama-3.3-70B-Instruct" }] });
+  if (cmd.includes("127.0.0.1:11434")) return "";
+  if (cmd.includes("127.0.0.1:8000/v1/models")) return JSON.stringify({ data: [{ id: "meta-llama/Llama-3.3-70B-Instruct" }] });
   return "";
 };
 
@@ -2862,8 +2862,8 @@ runner.runCapture = (command) => {
   // Once onboard.ts is migrated to argv (#1889), these mocks can assert Array.isArray.
   const cmd = Array.isArray(command) ? command.join(" ") : command;
   if (cmd.includes("command -v ollama")) return "";
-  if (cmd.includes("localhost:11434")) return "";
-  if (cmd.includes("localhost:8000/v1/models")) return "";
+  if (cmd.includes("127.0.0.1:11434")) return "";
+  if (cmd.includes("127.0.0.1:8000/v1/models")) return "";
   return "";
 };