docs(hygiene): improve portability and issue template defaults

Author: rldyourmnd

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -12,7 +12,7 @@ body:
     id: os_version
     attributes:
       label: macOS version
-      placeholder: "macOS 26.4"
+      placeholder: "macOS 15.3"
     validations:
       required: true
   - type: input

.github/ISSUE_TEMPLATE/question.yml

@@ -23,6 +23,6 @@ body:
     attributes:
       label: Environment
       description: macOS version and architecture
-      placeholder: "macOS 26.4, arm64"
+      placeholder: "macOS 15.3, arm64"
     validations:
       required: true

.gitignore

@@ -6,6 +6,9 @@
 .cache/
 .venv/
 venv/
+.serena/
+.claude/
+.codex/
 
 # Temporary debug artifacts
 /tmp

docs/maintenance.md

@@ -3,7 +3,7 @@
 ## Update workflow
 
 ```bash
-cd /Users/rldyourmnd/projects/new-macos-dev-setup
+cd ~/projects/new-macos-dev-setup
 git pull
 ./install-macos.sh --start-orbstack
 ```

docs/verification.md

@@ -5,7 +5,7 @@
 Run:
 
 ```bash
-cd /Users/rldyourmnd/projects/new-macos-dev-setup
+cd ~/projects/new-macos-dev-setup
 ./install-macos.sh
 ```