From 0bcf7045e1c869a2a6134bcc2926faca0d2d2ceb Mon Sep 17 00:00:00 2001
From: Jesse Andrews <anotherjesse@gmail.com>
Date: Thu, 3 Jul 2025 08:22:43 -0700
Subject: [PATCH 1/2] remind claude we use deno not node, and some default
 permissions

---
 .claude/scripts/block-node.py | 13 +++++++++++++
 .claude/settings.json         | 26 ++++++++++++++++++++++++++
 .gitignore                    |  1 +
 3 files changed, 40 insertions(+)
 create mode 100644 .claude/scripts/block-node.py
 create mode 100644 .claude/settings.json

diff --git a/.claude/scripts/block-node.py b/.claude/scripts/block-node.py
new file mode 100644
index 000000000..b25dd65f1
--- /dev/null
+++ b/.claude/scripts/block-node.py
@@ -0,0 +1,13 @@
+#!/usr/bin/env python3
+import json, re, sys
+
+data = json.load(sys.stdin)
+cmd  = data.get("tool_input", {}).get("command", "")
+
+# If Claude is about to run a shell command that uses a Node package-manager…
+if re.search(r'\b(npm|npx|yarn|pnpm|node)\b', cmd):
+    # Send feedback to Claude and *block* the tool call
+    print("We use **Deno** in this repo – please rewrite the command accordingly.", file=sys.stderr)
+    sys.exit(2)        # exit-code 2 = “block & show stderr to Claude”
+# Otherwise let the call proceed
+sys.exit(0)
diff --git a/.claude/settings.json b/.claude/settings.json
new file mode 100644
index 000000000..84b52b381
--- /dev/null
+++ b/.claude/settings.json
@@ -0,0 +1,26 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(grep:*)",
+      "Bash(deno test:*)",
+      "Bash(deno task test:*)",
+      "Bash(find:*)",
+      "Bash(deno lint:*)",
+      "Bash(rg:*)"
+    ],
+    "deny": []
+  },
+  "hooks": {
+    "PreToolUse": [
+      {
+        "matcher": "Bash",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "python3 .claude/scripts/block-node.py"
+          }
+        ]
+      }
+    ]
+  }
+}
diff --git a/.gitignore b/.gitignore
index 2462c1755..5702b4fcb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,3 +16,4 @@ packages/seeder/results
 .claude-prompt.tmp
 .pr-desc.tmp
 dist/
+.claude/settings.local.json

From 2b910dfb7213ae1e7d6a627e2b6ebab72a6a5af4 Mon Sep 17 00:00:00 2001
From: Jesse Andrews <anotherjesse@gmail.com>
Date: Thu, 3 Jul 2025 08:33:38 -0700
Subject: [PATCH 2/2] use deno to block node

---
 .claude/scripts/block-node.py | 13 -------------
 .claude/scripts/block-node.ts | 28 ++++++++++++++++++++++++++++
 .claude/settings.json         |  2 +-
 3 files changed, 29 insertions(+), 14 deletions(-)
 delete mode 100644 .claude/scripts/block-node.py
 create mode 100644 .claude/scripts/block-node.ts

diff --git a/.claude/scripts/block-node.py b/.claude/scripts/block-node.py
deleted file mode 100644
index b25dd65f1..000000000
--- a/.claude/scripts/block-node.py
+++ /dev/null
@@ -1,13 +0,0 @@
-#!/usr/bin/env python3
-import json, re, sys
-
-data = json.load(sys.stdin)
-cmd  = data.get("tool_input", {}).get("command", "")
-
-# If Claude is about to run a shell command that uses a Node package-manager…
-if re.search(r'\b(npm|npx|yarn|pnpm|node)\b', cmd):
-    # Send feedback to Claude and *block* the tool call
-    print("We use **Deno** in this repo – please rewrite the command accordingly.", file=sys.stderr)
-    sys.exit(2)        # exit-code 2 = “block & show stderr to Claude”
-# Otherwise let the call proceed
-sys.exit(0)
diff --git a/.claude/scripts/block-node.ts b/.claude/scripts/block-node.ts
new file mode 100644
index 000000000..4de815317
--- /dev/null
+++ b/.claude/scripts/block-node.ts
@@ -0,0 +1,28 @@
+#!/usr/bin/env -S deno run --allow-read
+/**
+ * .claude/scripts/block-node.ts
+ *
+ * Claude Code Pre-Tool hook.
+ * - Blocks shell commands that invoke npm, npx, yarn, pnpm, or node.
+ * - Prints a Deno-friendly reminder to stderr.
+ * - Exits 2 so Claude blocks the tool call and shows the message.
+ */
+
+const rawInput = await new Response(Deno.stdin.readable).text();
+
+let cmd = "";
+try {
+  const payload = JSON.parse(rawInput);
+  cmd = payload?.tool_input?.command ?? "";
+} catch {
+  // If the JSON is malformed we allow the call rather than choke the hook.
+}
+
+if (/\b(npm|npx|yarn|pnpm|node)\b/.test(cmd)) {
+  console.error(
+    "We use **Deno** in this repo – please rewrite the command accordingly.",
+  );
+  Deno.exit(2); // Claude interprets exit-code 2 as “block & surface stderr”
+}
+
+Deno.exit(0); // Let the tool call proceed
diff --git a/.claude/settings.json b/.claude/settings.json
index 84b52b381..7a1a63b02 100644
--- a/.claude/settings.json
+++ b/.claude/settings.json
@@ -17,7 +17,7 @@
         "hooks": [
           {
             "type": "command",
-            "command": "python3 .claude/scripts/block-node.py"
+            "command": "deno run \"$(git rev-parse --show-toplevel)/.claude/scripts/block-node.ts\""
           }
         ]
       }