docs: sync to Claude Code v2.1.143 (5 patches since v2.1.138)

Bumps tutorial coverage from v2.1.138 → v2.1.143. Highlights:

- /goal and /scroll-speed slash commands (v2.1.139)
- claude agents Agent View (Research Preview) with 9 dispatch flags
- claude plugin details and marketplace context-cost projection
- Hook exec form (args), continueOnBlock on PostToolUse, terminalSequence
- Stop hook 8-block safety cap + override env var
- Fast Mode default flipped to Opus 4.7 (v2.1.142)
- PowerShell tool default-on for Bedrock/Vertex/Foundry on Windows
- API-key auth disables Remote Control, /schedule, claude.ai MCP, notifications
- worktree.bgIsolation setting
- CLAUDE_PROJECT_DIR for MCP stdio servers
- Subagent OTEL headers + case-insensitive subagent_type matching
- Root-level SKILL.md plugin pattern; Routines marketing name note

Also bumps stale "28 hook events" counts in CATALOG/README to 29 and
refreshes the metadata footer (Last Updated, Claude Code Version,
Sources) on every modified file.

01-slash-commands/README.md

@@ -42,8 +42,9 @@ Built-in commands are shortcuts for common actions. There are **60+ built-in com
 | `/export [filename]` | Export the current conversation to a file or clipboard |
 | `/extra-usage` | Configure extra usage for rate limits |
 | `/fast [on\|off]` | Toggle fast mode |
-| `/feedback` | Submit feedback (alias: `/bug`) |
+| `/feedback` | Submit feedback (alias: `/bug`). Since v2.1.141, can attach recent sessions (last 24h or 7d) so reports spanning more than one session include context. |
 | `/focus` | Toggle focus view (added v2.1.110; replaces `Ctrl+O` for focus toggle) |
+| `/goal <statement>` | Register a session-level completion condition; Claude keeps working until the goal is met. `/goal clear` removes it. Active goal appears in the status line, with a live overlay panel showing elapsed time, turn count, and token usage (added v2.1.139). |
 | `/help` | Show help |
 | `/hooks` | View hook configurations |
 | `/ide` | Manage IDE integrations |
@@ -77,6 +78,7 @@ Built-in commands are shortcuts for common actions. There are **60+ built-in com
 | `/rewind` | Rewind conversation and/or code (alias: `/checkpoint`) |
 | `/sandbox` | Toggle sandbox mode |
 | `/schedule [description]` | Create/manage Cloud scheduled tasks |
+| `/scroll-speed <+N\|-N>` | Tune mouse-wheel scroll speed of the TUI live-preview pane with a live preview. Persists per-machine to `~/.claude/preferences.json` (added v2.1.139). |
 | `/security-review` | Analyze branch for security vulnerabilities |
 | `/skills` | List available skills |
 | `/stats` | Typing-shortcut alias for `/usage` — opens the stats tab (daily usage, sessions, streaks) (v2.1.118+) |
@@ -144,6 +146,23 @@ These skills ship with Claude Code and are invoked like slash commands:
 - `/ultrareview` added for comprehensive cloud-based multi-agent code review (v2.1.111)
 - `/less-permission-prompts` added to analyze Bash/MCP tool calls and reduce permission prompts via an allowlist in `.claude/settings.json` (v2.1.111)
 - Auto mode no longer requires the `--enable-auto-mode` flag for Max subscribers on Opus 4.7 (v2.1.112)
+- `/goal` added — session-level completion condition that Claude works toward across turns; live overlay shows elapsed time, turn count, and token usage (v2.1.139)
+- `/scroll-speed` added — tune mouse-wheel scroll speed of the TUI live-preview pane; persists per-machine (v2.1.139)
+
+### `/goal` — Session-Level Completion Condition
+
+> **New in v2.1.139**
+
+Use `/goal` to register a completion condition for the current session. Claude works toward it across turns, and an overlay panel shows elapsed time, turn count, and tokens used. Clear it with `/goal clear`. Works in interactive mode, `claude -p`, and Remote Control.
+
+```
+User: /goal Migrate the payments service from REST to gRPC and get the integration tests passing.
+Claude: Goal registered. I'll work toward this until you clear it.
+[Goal panel: ⏱ 0s · turns 0 · tokens 0]
+
+User: start by listing the REST endpoints
+Claude: [does the work, panel updates]
+```
 
 ### `/team-onboarding` — Teammate Ramp-Up Guide
 
@@ -601,14 +620,16 @@ If both exist with the same name, the **skill takes precedence**. Remove one or
 
 ---
 
-**Last Updated**: May 9, 2026
-**Claude Code Version**: 2.1.138
+**Last Updated**: May 19, 2026
+**Claude Code Version**: 2.1.143
 **Sources**:
 - https://code.claude.com/docs/en/slash-commands
 - https://code.claude.com/docs/en/interactive-mode
 - https://code.claude.com/docs/en/changelog
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.118
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.116
+- https://github.com/anthropics/claude-code/releases/tag/v2.1.139
+- https://github.com/anthropics/claude-code/releases/tag/v2.1.141
 **Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
 
 *Part of the [Claude How To](../) guide series*