diff --git a/package.json b/package.json
index 48b8ebba..10cdcfa3 100644
--- a/package.json
+++ b/package.json
@@ -118,7 +118,13 @@
   "dependencies": {
     "@anthropic-ai/claude-agent-sdk": "^0.2.119",
     "@clack/prompts": "^1.2.0",
+    "@derekstride/tree-sitter-sql": "^0.3.11",
     "@modelcontextprotocol/sdk": "^1.29.0",
+    "@tree-sitter-grammars/tree-sitter-lua": "^0.4.1",
+    "@tree-sitter-grammars/tree-sitter-markdown": "^0.3.2",
+    "@tree-sitter-grammars/tree-sitter-toml": "^0.7.0",
+    "@tree-sitter-grammars/tree-sitter-yaml": "^0.7.1",
+    "@tree-sitter-grammars/tree-sitter-zig": "^1.1.2",
     "ansi-to-html": "^0.7.2",
     "dompurify": "^3.4.1",
     "express": "^5.2.1",
@@ -127,31 +133,6 @@
     "picocolors": "^1.1.1",
     "react": "^19.2.5",
     "react-dom": "^19.2.5",
-    "yaml": "^2.8.3",
-    "zod": "^4.3.6",
-    "zod-to-json-schema": "^3.25.2"
-  },
-  "devDependencies": {
-    "@derekstride/tree-sitter-sql": "^0.3.11",
-    "@tree-sitter-grammars/tree-sitter-lua": "^0.4.1",
-    "@tree-sitter-grammars/tree-sitter-markdown": "^0.3.2",
-    "@tree-sitter-grammars/tree-sitter-toml": "^0.7.0",
-    "@tree-sitter-grammars/tree-sitter-yaml": "^0.7.1",
-    "@tree-sitter-grammars/tree-sitter-zig": "^1.1.2",
-    "@types/bun": "^1.3.13",
-    "@types/cors": "^2.8.19",
-    "@types/dompurify": "^3.2.0",
-    "@types/express": "^5.0.6",
-    "@types/node": "^25.6.0",
-    "@types/react": "^19.2.14",
-    "@types/react-dom": "^19.2.3",
-    "esbuild": "^0.28.0",
-    "jimp": "^1.6.1",
-    "np": "^11.2.0",
-    "parse5": "^8.0.1",
-    "postcss": "^8.5.13",
-    "remark-mdx": "^3.1.1",
-    "remark-parse": "^11.0.0",
     "tree-sitter-bash": "^0.25.1",
     "tree-sitter-c": "^0.24.1",
     "tree-sitter-cli": "^0.26.8",
@@ -171,6 +152,25 @@
     "tree-sitter-scss": "^1.0.0",
     "tree-sitter-swift": "^0.7.1",
     "tree-sitter-typescript": "^0.23.2",
+    "yaml": "^2.8.3",
+    "zod": "^4.3.6",
+    "zod-to-json-schema": "^3.25.2"
+  },
+  "devDependencies": {
+    "@types/bun": "^1.3.13",
+    "@types/cors": "^2.8.19",
+    "@types/dompurify": "^3.2.0",
+    "@types/express": "^5.0.6",
+    "@types/node": "^25.6.0",
+    "@types/react": "^19.2.14",
+    "@types/react-dom": "^19.2.3",
+    "esbuild": "^0.28.0",
+    "jimp": "^1.6.1",
+    "np": "^11.2.0",
+    "parse5": "^8.0.1",
+    "postcss": "^8.5.13",
+    "remark-mdx": "^3.1.1",
+    "remark-parse": "^11.0.0",
     "ts-prune": "^0.10.3",
     "tsx": "^4.21.0",
     "typescript": "^6.0.3",
diff --git a/src/npx-cli/commands/install.ts b/src/npx-cli/commands/install.ts
index fb5dff7a..debd4dcd 100644
--- a/src/npx-cli/commands/install.ts
+++ b/src/npx-cli/commands/install.ts
@@ -539,7 +539,11 @@ function runNpmInstallInMarketplace(): void {
 
   if (!existsSync(packageJsonPath)) return;
 
-  execSync('npm install --production', {
+  // --legacy-peer-deps suppresses a known false-positive ERESOLVE between
+  // tree-sitter@0.21 and @tree-sitter-grammars/* peer ranges. The native
+  // bindings path is unused (we load .wasm), so the conflict is benign.
+  // Revisit if real peer constraints are added to the marketplace deps.
+  execSync('npm install --omit=dev --legacy-peer-deps', {
     cwd: marketplaceDir,
     stdio: 'pipe',
     encoding: 'utf8',