config(git,claude,ssh): templated gitconfig; claude settings/commands/hooks/skills; ssh config

gitconfig: name/email from chezmoi data, gh credential helper by PATH
lookup (portable to darwin). claude: no credentials, history, projects,
sessions, or plugin caches. ssh config as private_ (0600).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

dot_claude/skills/sandbox-sdk/references/api-quick-ref.md

@@ -0,0 +1,113 @@
+# Sandbox SDK API Reference
+
+Detailed API for `@cloudflare/sandbox`. For full docs: https://developers.cloudflare.com/sandbox/api/
+
+## Lifecycle
+
+```typescript
+getSandbox(binding: DurableObjectNamespace<Sandbox>, sandboxId: string, options?: SandboxOptions): Sandbox
+
+interface SandboxOptions {
+  sleepAfter?: string;     // Duration before auto-sleep (default: "10m")
+  keepAlive?: boolean;     // Prevent auto-sleep (default: false)
+  normalizeId?: boolean;   // Lowercase IDs for preview URLs (default: false)
+}
+
+await sandbox.destroy(): Promise<void>  // Immediately terminate and delete all state
+```
+
+## Commands
+
+```typescript
+await sandbox.exec(command: string, options?: ExecOptions): Promise<ExecResult>
+
+interface ExecOptions {
+  cwd?: string;           // Working directory
+  env?: Record<string, string>;  // Environment variables
+  timeout?: number;       // Timeout in ms (no default; runs without timeout if unset)
+  stdin?: string;         // Input to command
+}
+
+interface ExecResult {
+  stdout: string;
+  stderr: string;
+  exitCode: number;
+  success: boolean;       // exitCode === 0
+}
+```
+
+## Code Interpreter
+
+```typescript
+await sandbox.createCodeContext(options?: CreateContextOptions): Promise<CodeContext>
+
+interface CreateContextOptions {
+  language?: 'python' | 'javascript' | 'typescript';  // default: 'python'
+  cwd?: string;           // Working directory (default: '/workspace')
+  envVars?: Record<string, string>;
+  timeout?: number;       // Request timeout in ms (default: 30000)
+}
+
+await sandbox.runCode(code: string, options?: RunCodeOptions): Promise<ExecutionResult>
+
+interface RunCodeOptions {
+  context?: CodeContext;  // Reuse context for state persistence
+  language?: 'python' | 'javascript' | 'typescript';
+  timeout?: number;       // Execution timeout in ms (default: 60000)
+}
+
+interface ExecutionResult {
+  code: string;
+  logs: { stdout: string[]; stderr: string[] };
+  results: RichOutput[];  // text, html, png, json, etc.
+  error?: { name: string; value: string; traceback: string[] };
+  executionCount: number;
+}
+```
+
+## Files
+
+```typescript
+await sandbox.writeFile(path: string, content: string | Uint8Array): Promise<void>
+await sandbox.readFile(path: string): Promise<{ content: string }>
+await sandbox.mkdir(path: string, options?: { recursive?: boolean }): Promise<void>
+await sandbox.listFiles(path: string): Promise<FileMetadata[]>
+await sandbox.deleteFile(path: string): Promise<void>
+
+interface FileMetadata {
+  name: string;
+  path: string;
+  isDirectory: boolean;
+  size: number;
+  modifiedAt: string;
+}
+```
+
+## Ports
+
+```typescript
+await sandbox.exposePort(port: number): Promise<{ url: string; token: string }>
+await sandbox.unexposePort(port: number): Promise<void>
+await sandbox.listPorts(): Promise<PortInfo[]>
+```
+
+## Error Handling
+
+Errors include context about the operation:
+
+```typescript
+try {
+  await sandbox.exec('invalid-command');
+} catch (error) {
+  // error.message includes command and sandbox context
+}
+```
+
+For `runCode()`, check `result.error` instead of catching:
+
+```typescript
+const result = await sandbox.runCode('1/0', { language: 'python' });
+if (result.error) {
+  console.error(result.error.name);  // "ZeroDivisionError"
+}
+```