chore: general maintenance and cleanup (#306)

.claude/agents/code-reviewer.md

@@ -0,0 +1,14 @@
+---
+name: code-reviewer
+description: Reviews shell/fish/lua changes for correctness and style
+tools: [Read, Grep, Glob, Bash]
+---
+
+Review the changed files for:
+
+1. **Shell scripts**: POSIX compliance for /bin/sh scripts, proper quoting, shellcheck issues
+2. **Fish files**: fish syntax correctness, consistent function patterns
+3. **Lua files**: stylua compliance, Neovim API usage patterns
+4. **All**: EditorConfig compliance (2-space indent, LF endings)
+
+Report only high-confidence issues. Skip vendor files (fzf-tmux).

.claude/settings.json

@@ -22,6 +22,10 @@
           {
             "type": "command",
             "command": "fp=$(cat | jq -r '.tool_input.file_path // empty') && [ -n \"$fp\" ] && [ -f \"$fp\" ] && case \"$fp\" in *.fish) command -v fish_indent > /dev/null && fish_indent -w \"$fp\";; esac; exit 0"
+          },
+          {
+            "type": "command",
+            "command": "fp=$(cat | jq -r '.tool_input.file_path // empty') && [ -n \"$fp\" ] && [ -f \"$fp\" ] && case \"$fp\" in *.lua) command -v stylua > /dev/null && stylua \"$fp\";; esac; exit 0"
           }
         ]
       }

.claude/skills/yaml-validate/SKILL.md

@@ -0,0 +1,38 @@
+---
+name: yaml-validate
+description: >-
+  Validate YAML files after editing.
+  Apply when writing or modifying any .yml or .yaml file.
+user-invocable: false
+allowed-tools: Bash, Read
+---
+
+After editing any YAML file, validate it:
+
+## 1. Syntax check
+
+Run yamllint on the file:
+
+```bash
+yamllint <file>
+```
+
+If yamllint is not available, fall back to:
+
+```bash
+python3 -c "import yaml; yaml.safe_load(open('<file>'))"
+```
+
+## 2. GitHub Actions workflows
+
+If the file is under `.github/workflows/`, also run:
+
+```bash
+actionlint <file>
+```
+
+If actionlint is not available, skip silently.
+
+## Files to skip
+
+- `config/gh/hosts.yml` — managed by `gh` CLI, not hand-edited