diff --git a/.gitignore b/.gitignore
index 478c8bc..2e62b3a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,6 @@ dist/
 out/
 *.vsix
 *.zip
+
+# Local planning and handoff files
+sqlovely_private_companion_pack*/
diff --git a/.vscodeignore b/.vscodeignore
index 14279d6..f9d35e8 100644
--- a/.vscodeignore
+++ b/.vscodeignore
@@ -28,6 +28,9 @@ eslint.config.js
 *.vsix
 *.zip
 
+# Local planning and handoff files
+sqlovely_private_companion_pack*/**
+
 # OS files
 .DS_Store
 Thumbs.db
diff --git a/test/runProjectValidationTests.js b/test/runProjectValidationTests.js
index 91989ec..c3c7f46 100644
--- a/test/runProjectValidationTests.js
+++ b/test/runProjectValidationTests.js
@@ -196,6 +196,7 @@ runTest('project package hygiene rules exclude local-only files from distributab
   assert.ok(vscodeIgnore.includes('out/**'));
   assert.ok(vscodeIgnore.includes('*.vsix'));
   assert.ok(vscodeIgnore.includes('*.zip'));
+  assert.ok(vscodeIgnore.includes('sqlovely_private_companion_pack*/**'));
   assert.ok(!vscodeIgnore.split('\n').includes('dist/**'));
 
   assert.ok(gitIgnore.includes('node_modules/'));
@@ -203,6 +204,7 @@ runTest('project package hygiene rules exclude local-only files from distributab
   assert.ok(gitIgnore.includes('out/'));
   assert.ok(gitIgnore.includes('*.vsix'));
   assert.ok(gitIgnore.includes('*.zip'));
+  assert.ok(gitIgnore.includes('sqlovely_private_companion_pack*/'));
 });
 
 runTest('SQLovely grammar exposes the expected repository sections', () => {