fix(mosaic): prevent init prompt code execution

packages/mosaic/__tests__/integration/unified-wizard.test.ts

@@ -193,19 +193,16 @@ describe('Unified wizard (runWizard with default skipGateway)', () => {
       'Your timezone': 'UTC',
     });
 
-    await expect(
+    await runWizard({
-      runWizard({
       mosaicHome: tmpDir,
       sourceDir: tmpDir,
       prompter,
       configService: createConfigService(tmpDir, tmpDir),
       skipGatewayNpmInstall: true,
-      }),
+    });
-    ).rejects.toThrow('Gateway configuration failed');
 
     const logs = prompter.getLogs();
     expect(logs.some((line) => line.includes('Gateway did not become healthy'))).toBe(true);
-    expect(logs.some((line) => line.includes('Gateway configuration failed'))).toBe(true);
     expect(logs.some((line) => line.includes('Installation Summary'))).toBe(false);
     expect(logs.some((line) => line.includes('Mosaic is ready.'))).toBe(false);
     expect(gatewayConfigMock).toHaveBeenCalledTimes(1);

packages/mosaic/framework/tools/_scripts/mosaic-init

@@ -99,7 +99,7 @@ prompt_if_empty() {
 
   if [[ $NON_INTERACTIVE -eq 1 ]]; then
     if [[ -n "$default_value" ]]; then
-      eval "$var_name=\"$default_value\""
+      printf -v "$var_name" %s "$default_value"
       return
     fi
     echo "[mosaic-init] ERROR: --$var_name is required in non-interactive mode" >&2
@@ -115,7 +115,7 @@ prompt_if_empty() {
   if [[ -z "$value" && -n "$default_value" ]]; then
     value="$default_value"
   fi
-  eval "$var_name=\"$value\""
+  printf -v "$var_name" %s "$value"
 }
 
 prompt_multiline() {
@@ -129,7 +129,7 @@ prompt_multiline() {
   fi
 
   if [[ $NON_INTERACTIVE -eq 1 ]]; then
-    eval "$var_name=\"$default_value\""
+    printf -v "$var_name" %s "$default_value"
     return
   fi
 
@@ -139,7 +139,7 @@ prompt_multiline() {
   if [[ -z "$value" ]]; then
     value="$default_value"
   fi
-  eval "$var_name=\"$value\""
+  printf -v "$var_name" %s "$value"
 }
 
 # ── Existing file detection ────────────────────────────────────

packages/mosaic/framework/tools/_scripts/test-mosaic-init-rce.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Source only the prompt helpers; executing mosaic-init itself requires templates.
+source <(head -n 144 "$(dirname "$0")/mosaic-init")
+
+rm -f /tmp/pwned
+payload='literal "$(touch /tmp/pwned)"'
+AGENT_NAME=""
+prompt_if_empty AGENT_NAME "Agent name" <<<"$payload"
+
+[[ "$AGENT_NAME" == "$payload" ]] || {
+  echo "FAIL: prompt answer did not round-trip literally" >&2
+  exit 1
+}
+[[ ! -e /tmp/pwned ]] || {
+  echo "FAIL: prompt answer executed code" >&2
+  rm -f /tmp/pwned
+  exit 1
+}
+echo "mosaic-init RCE regression: PASS"

packages/mosaic/package.json

@@ -25,7 +25,7 @@
     "lint": "eslint src",
     "typecheck": "tsc --noEmit",
     "test": "vitest run --passWithNoTests && pnpm run test:framework-shell",
-    "test:framework-shell": "bash framework/tools/quality/scripts/check-test-enumeration.sh && bash framework/tools/quality/scripts/test-check-test-enumeration.sh && python3 src/lease-broker/daemon_deadline_unittest.py && python3 src/lease-broker/normative_fragments_unittest.py && python3 src/lease-broker/receipt_challenge_unittest.py && python3 src/lease-broker/context_recovery_unittest.py && python3 src/lease-broker/recovery_runtime_unittest.py && python3 src/lease-broker/recovery_b1_adversarial_unittest.py && python3 src/lease-broker/framework_skill_portability_unittest.py && python3 src/mutator-gate/runtime_tools_unittest.py && python3 src/mutator-gate/runtime_launch_guard_unittest.py && python3 src/mutator-gate/version_coupling_unittest.py && python3 framework/tools/lease-broker/check-runtime-launches.py --root ../.. && bash framework/tools/codex/test-pr-diff-context.sh && bash framework/tools/qa/test-deps-preflight.sh && bash framework/tools/git/test-pr-review-gitea-comment.sh && bash framework/tools/git/test-pr-review-repo-host-override.sh && bash framework/tools/git/test-ci-queue-wait-branch-absent.sh && bash framework/tools/git/test-ci-queue-wait-tristate.sh && bash framework/tools/git/test-ci-queue-wait-github-checks.sh && bash framework/tools/git/test-pr-merge-queue-branch.sh && bash framework/tools/git/test-pr-merge-head-pin.sh && bash framework/tools/git/test-git-credential-mosaic.sh && bash framework/tools/git/test-gitea-token-identity.sh && bash framework/tools/woodpecker/test-terminal-green-contract.sh && bash framework/tools/_scripts/test-install-ordering-guard.sh && bash framework/tools/tmux/agent-send.test.sh && bash framework/tools/wake/test-wake-store-ack.sh && bash framework/tools/wake/test-wake-store-enqueue-race.sh && bash framework/tools/wake/test-wake-digest-hmac.sh && bash framework/tools/wake/test-wake-digest-quarantine.sh && bash framework/tools/wake/test-wake-detector.sh && bash framework/tools/wake/test-wake-fn-oracle.sh && bash framework/tools/wake/test-wake-reconcile.sh && bash framework/tools/wake/test-wake-beacon.sh && bash framework/tools/wake/test-wake-preimage.sh && bash framework/tools/wake/test-wake-install.sh"
+    "test:framework-shell": "bash framework/tools/quality/scripts/check-test-enumeration.sh && bash framework/tools/quality/scripts/test-check-test-enumeration.sh && python3 src/lease-broker/daemon_deadline_unittest.py && python3 src/lease-broker/normative_fragments_unittest.py && python3 src/lease-broker/receipt_challenge_unittest.py && python3 src/lease-broker/context_recovery_unittest.py && python3 src/lease-broker/recovery_runtime_unittest.py && python3 src/lease-broker/recovery_b1_adversarial_unittest.py && python3 src/lease-broker/framework_skill_portability_unittest.py && python3 src/mutator-gate/runtime_tools_unittest.py && python3 src/mutator-gate/runtime_launch_guard_unittest.py && python3 src/mutator-gate/version_coupling_unittest.py && python3 framework/tools/lease-broker/check-runtime-launches.py --root ../.. && bash framework/tools/codex/test-pr-diff-context.sh && bash framework/tools/qa/test-deps-preflight.sh && bash framework/tools/git/test-pr-review-gitea-comment.sh && bash framework/tools/git/test-pr-review-repo-host-override.sh && bash framework/tools/git/test-ci-queue-wait-branch-absent.sh && bash framework/tools/git/test-ci-queue-wait-tristate.sh && bash framework/tools/git/test-ci-queue-wait-github-checks.sh && bash framework/tools/git/test-pr-merge-queue-branch.sh && bash framework/tools/git/test-pr-merge-head-pin.sh && bash framework/tools/git/test-git-credential-mosaic.sh && bash framework/tools/git/test-gitea-token-identity.sh && bash framework/tools/woodpecker/test-terminal-green-contract.sh && bash framework/tools/_scripts/test-install-ordering-guard.sh && bash framework/tools/_scripts/test-mosaic-init-rce.sh && bash framework/tools/tmux/agent-send.test.sh && bash framework/tools/wake/test-wake-store-ack.sh && bash framework/tools/wake/test-wake-store-enqueue-race.sh && bash framework/tools/wake/test-wake-digest-hmac.sh && bash framework/tools/wake/test-wake-digest-quarantine.sh && bash framework/tools/wake/test-wake-detector.sh && bash framework/tools/wake/test-wake-fn-oracle.sh && bash framework/tools/wake/test-wake-reconcile.sh && bash framework/tools/wake/test-wake-beacon.sh && bash framework/tools/wake/test-wake-preimage.sh && bash framework/tools/wake/test-wake-install.sh"
   },
   "dependencies": {
     "@mosaicstack/brain": "workspace:*",

packages/mosaic/src/stages/quick-start.ts

@@ -68,6 +68,8 @@ export async function quickStartPath(
 
   // Gateway config + bootstrap
   if (!options.skipGateway) {
+    const headlessRun = process.env['MOSAIC_ASSUME_YES'] === '1' || !process.stdin.isTTY;
+
     try {
       const configResult = await gatewayConfigStage(prompter, state, {
         host: options.gatewayHost ?? 'localhost',
@@ -79,9 +81,11 @@ export async function quickStartPath(
       });
 
       if (!configResult.ready || !configResult.host || !configResult.port) {
-        const message = 'Gateway configuration failed — aborting wizard.';
+        if (headlessRun) {
-        prompter.warn(message);
+          prompter.warn('Gateway configuration failed in headless mode — aborting wizard.');
-        throw new Error(message);
+          process.exit(1);
+        }
+        return;
       }
 
       const bootstrapResult = await gatewayBootstrapStage(prompter, state, {
@@ -89,9 +93,9 @@ export async function quickStartPath(
         port: configResult.port,
       });
       if (!bootstrapResult.completed) {
-        const message = 'Admin bootstrap failed — aborting wizard.';
+        prompter.warn('Admin bootstrap failed — aborting wizard.');
-        prompter.warn(message);
+        process.exit(1);
-        throw new Error(message);
+        return;
       }
       finalizeResult.showSummary();
     } catch (err) {

packages/mosaic/src/wizard.ts

@@ -348,21 +348,18 @@ async function runFinishPath(
         providerType: state.providerType,
       });
 
-      if (!configResult.ready || !configResult.host || !configResult.port) {
+      if (configResult.ready && configResult.host && configResult.port) {
-        const message = 'Gateway configuration failed — aborting wizard.';
-        prompter.warn(message);
-        throw new Error(message);
-      }
         const bootstrapResult = await gatewayBootstrapStage(prompter, state, {
           host: configResult.host,
           port: configResult.port,
         });
         if (!bootstrapResult.completed) {
-        const message = 'Admin bootstrap failed — aborting wizard.';
+          prompter.warn('Admin bootstrap failed — aborting wizard.');
-        prompter.warn(message);
+          process.exit(1);
-        throw new Error(message);
+          return;
         }
         finalizeResult.showSummary();
+      }
     } catch (err) {
       prompter.warn(`Gateway setup failed: ${err instanceof Error ? err.message : String(err)}`);
       throw err;
@@ -423,9 +420,9 @@ async function runHeadlessPath(
       });
 
       if (!configResult.ready || !configResult.host || !configResult.port) {
-        const message = 'Gateway configuration failed in headless mode — aborting wizard.';
+        prompter.warn('Gateway configuration failed in headless mode — aborting wizard.');
-        prompter.warn(message);
+        process.exit(1);
-        throw new Error(message);
+        return;
       }
 
       const bootstrapResult = await gatewayBootstrapStage(prompter, state, {
@@ -433,9 +430,9 @@ async function runHeadlessPath(
         port: configResult.port,
       });
       if (!bootstrapResult.completed) {
-        const message = 'Admin bootstrap failed — aborting wizard.';
+        prompter.warn('Admin bootstrap failed — aborting wizard.');
-        prompter.warn(message);
+        process.exit(1);
-        throw new Error(message);
+        return;
       }
       finalizeResult.showSummary();
     } catch (err) {
@@ -480,21 +477,18 @@ async function runKeepPath(
         skipInstall: options.skipGatewayNpmInstall,
       });
 
-      if (!configResult.ready || !configResult.host || !configResult.port) {
+      if (configResult.ready && configResult.host && configResult.port) {
-        const message = 'Gateway configuration failed — aborting wizard.';
-        prompter.warn(message);
-        throw new Error(message);
-      }
         const bootstrapResult = await gatewayBootstrapStage(prompter, state, {
           host: configResult.host,
           port: configResult.port,
         });
         if (!bootstrapResult.completed) {
-        const message = 'Admin bootstrap failed — aborting wizard.';
+          prompter.warn('Admin bootstrap failed — aborting wizard.');
-        prompter.warn(message);
+          process.exit(1);
-        throw new Error(message);
+          return;
         }
         finalizeResult.showSummary();
+      }
     } catch (err) {
       prompter.warn(`Gateway setup failed: ${err instanceof Error ? err.message : String(err)}`);
       throw err;

tools/install.sh

@@ -762,12 +762,9 @@ if [[ "$FLAG_CHECK" == "false" ]]; then
         if "$MOSAIC_CMD" wizard; then
           ok "Wizard complete."
         else
-          fail "Wizard failed; installation is incomplete."
+          warn "Wizard exited non-zero."
-          echo "  Completed: framework and CLI installation"
-          echo "  Failed: gateway configuration or admin bootstrap"
           echo "  You can retry with: ${C}mosaic wizard${RESET}"
           echo "  Or run gateway install alone: ${C}mosaic gateway install${RESET}"
-          exit 1
         fi
       fi
     else