fix: upgrade node-pty to 1.2.0-beta.11 to fix macOS PTY leak

node-pty v1.1.0 has an off-by-one bug in pty_posix_spawn() on macOS
where low_fds[0] (allocated via posix_openpt()) is never closed due
to a buggy cleanup loop (`count > 0` vs the correct `i <= count`).
This leaks 1 PTY master fd per pty.spawn() call, eventually exhausting
all 511 PTY pairs on macOS (kern.tty.ptmx_max).

Upstream fix: microsoft/node-pty#882 (merged 2026-01-28).

Also fixes the abort handler to kill the entire process group (-pid)
with SIGTERM instead of sending SIGHUP to just the launcher PID,
ensuring the Claude binary grandchild is also terminated.

Author: speakman

packages/happy-cli/package.json

@@ -115,7 +115,7 @@
     "tar": "^7.5.2",
     "tmp": "^0.2.5",
     "tweetnacl": "^1.0.3",
-    "node-pty": "^1.1.0",
+    "node-pty": "1.2.0-beta.11",
     "zod": "3.25.76"
   },
   "devDependencies": {

packages/happy-cli/src/claude/claudeLocal.ts

@@ -317,11 +317,17 @@ export async function claudeLocal(opts: {
             let ptyProcess: ReturnType<typeof pty.spawn> | null = null;
 
             const abortHandler = () => {
-                logger.debug('[ClaudeLocal] Abort signal triggered - terminating PTY process');
+                logger.debug('[ClaudeLocal] Abort signal triggered - terminating PTY process group');
                 try {
-                    ptyProcess?.kill();
+                    // Kill the entire process group (negative PID) so the Claude binary
+                    // grandchild is also terminated, not just the node launcher.
+                    // node-pty spawns with POSIX_SPAWN_SETSID so the child is its own
+                    // session leader and process group leader.
+                    if (ptyProcess?.pid) {
+                        process.kill(-ptyProcess.pid, 'SIGTERM');
+                    }
                 } catch {
-                    // Already dead
+                    // Already dead or no such process group
                 }
             };
             opts.abort.addEventListener('abort', abortHandler, { once: true });

yarn.lock

@@ -10251,6 +10251,11 @@ new-github-release-url@2.0.0:
   dependencies:
     type-fest "^2.5.1"
 
+node-addon-api@^7.1.0:
+  version "7.1.1"
+  resolved "https://registry.yarnpkg.com/node-addon-api/-/node-addon-api-7.1.1.tgz#1aba6693b0f255258a049d621329329322aad558"
+  integrity sha512-5m3bsyrjFWE1xf7nz7YXdN4udnVtXK6/Yfgn5qnahL6bCkf2yKt4k3nuTKAtT4r3IG8JNR2ncsIMdZuAzJjHQQ==
+
 node-fetch-native@^1.6.6:
   version "1.6.7"
   resolved "https://registry.yarnpkg.com/node-fetch-native/-/node-fetch-native-1.6.7.tgz#9d09ca63066cc48423211ed4caf5d70075d76a71"
@@ -10273,6 +10278,13 @@ node-int64@^0.4.0:
   resolved "https://registry.yarnpkg.com/node-int64/-/node-int64-0.4.0.tgz#87a9065cdb355d3182d8f94ce11188b825c68a3b"
   integrity sha512-O5lz91xSOeoXP6DulyHfllpq+Eg00MWitZIbtPfoSEvqIHdl5gfcY6hYzDWnj0qD5tz52PI08u9qUvSVeUBeHw==
 
+node-pty@1.2.0-beta.11:
+  version "1.2.0-beta.11"
+  resolved "https://registry.yarnpkg.com/node-pty/-/node-pty-1.2.0-beta.11.tgz#b12338927cd5da9cfba82e39b5b36f74e52cbbe1"
+  integrity sha512-THcUyu1WwdgoIyUvgXOZ70EOMXzheGa0q3tbEb5kUIfKgcpBJ+AJ9Q1kq0bKtYmQzr77usXiTORZTLmAUQlnoQ==
+  dependencies:
+    node-addon-api "^7.1.0"
+
 node-releases@^2.0.27:
   version "2.0.27"
   resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-2.0.27.tgz#eedca519205cf20f650f61d56b070db111231e4e"