diff --git a/01-slash-commands/README.md b/01-slash-commands/README.md
index 8ace119..d3f007f 100644
--- a/01-slash-commands/README.md
+++ b/01-slash-commands/README.md
@@ -37,7 +37,7 @@ Built-in commands are shortcuts for common actions. There are **60+ built-in com
 | `/desktop` | Continue in Desktop app (alias: `/app`) |
 | `/diff` | Interactive diff viewer for uncommitted changes |
 | `/doctor` | Diagnose installation health — openable while Claude is responding; shows status icons; press `f` to auto-fix issues (enhanced in v2.1.116) |
-| `/effort [low\|medium\|high\|xhigh\|max\|auto]` | Set effort level via interactive arrow-key slider. Levels: `low` → `medium` → `high` → `xhigh` (new in v2.1.111) → `max`. Default is `xhigh` on Opus 4.7; `max` requires Opus 4.7 |
+| `/effort [low\|medium\|high\|xhigh\|max\|auto]` | Set effort level via interactive arrow-key slider. Levels: `low` → `medium` → `high` → `xhigh` (new in v2.1.111) → `max`. Default is `high` on Opus 4.8 (`xhigh` on Opus 4.7); `xhigh` needs Opus 4.8 or 4.7; `max` works on Opus 4.8/4.7/4.6 and Sonnet 4.6. The menu also offers `ultracode` (not a model effort level — it sends `xhigh` and has Claude orchestrate dynamic workflows; session-only) |
 | `/exit` | Exit the REPL (alias: `/quit`) |
 | `/export [filename]` | Export the current conversation to a file or clipboard |
 | `/usage-credits` | Configure extra usage for rate limits (renamed from `/extra-usage` in v2.1.144; `/extra-usage` still works as an alias) |
@@ -59,7 +59,7 @@ Built-in commands are shortcuts for common actions. There are **60+ built-in com
 | `/mcp` | Manage MCP servers and OAuth |
 | `/memory` | Edit `CLAUDE.md`, toggle auto-memory |
 | `/mobile` | QR code for mobile app (aliases: `/ios`, `/android`) |
-| `/model [model]` | Select model with left/right arrows for effort. Since v2.1.144, the choice applies only to the current session by default; press `d` after selecting a model to set it as the default for new sessions. |
+| `/model [model]` | Select model with left/right arrows for effort. Since v2.1.153, the choice is **saved as the default** for new sessions (matching the IDE); press `s` after selecting to apply it to the current session only. (The keybinding `modelPicker:setAsDefault` was renamed to `modelPicker:thisSessionOnly`; the old `d` action is now `s`.) |
 | `/passes` | Share free week of Claude Code |
 | `/permissions` | View/update permissions (alias: `/allowed-tools`) |
 | `/plan [description]` | Enter plan mode |
@@ -70,6 +70,7 @@ Built-in commands are shortcuts for common actions. There are **60+ built-in com
 | `/release-notes` | View changelog |
 | `/recap` | Show session recap / summary when returning to a session (added v2.1.108) |
 | `/reload-plugins` | Reload active plugins |
+| `/reload-skills` | Re-scan skill directories without restarting the session (added v2.1.152) |
 | `/remote-control` | Remote control from claude.ai (alias: `/rc`) |
 | `/remote-env` | Configure default remote environment |
 | `/rename [name]` | Rename session |
@@ -96,6 +97,7 @@ Built-in commands are shortcuts for common actions. There are **60+ built-in com
 | `/upgrade` | Open upgrade page for higher plan tier |
 | `/usage` | Canonical usage dashboard (v2.1.118) — combines plan usage limits, rate limits, cost, and daily session stats. `/cost` and `/stats` are typing-shortcut aliases that open specific tabs |
 | `/voice` | Toggle push-to-talk voice dictation |
+| `/workflows` | View running and completed dynamic workflow runs (added v2.1.154). See [Dynamic Workflows](../09-advanced-features/README.md#dynamic-workflows) |
 
 ### Bundled Skills
 
@@ -107,7 +109,8 @@ These skills ship with Claude Code and are invoked like slash commands:
 | `/claude-api` | Load Claude API reference for project language |
 | `/debug [description]` | Enable debug logging |
 | `/loop [interval] <prompt>` | Run prompt repeatedly on interval |
-| `/code-review [effort]` | Review the current diff for correctness bugs at a chosen effort level (e.g. `/code-review high`); renamed from `/simplify` in v2.1.146 |
+| `/code-review [effort]` | Review the current diff for correctness bugs at a chosen effort level (e.g. `/code-review high`). Originally absorbed `/simplify` in v2.1.146, but `/simplify` returned as a distinct command in v2.1.154 |
+| `/simplify` | Run a cleanup-only review (reuse / simplification / efficiency / altitude) and apply the fixes; does **not** hunt for bugs — use `/code-review` for that. Briefly an alias of `/code-review --fix` (v2.1.152), it became cleanup-only in v2.1.154 |
 
 ### Deprecated Commands
 
@@ -124,7 +127,7 @@ These skills ship with Claude Code and are invoked like slash commands:
 - `/fork` renamed to `/branch` with `/fork` kept as alias (v2.1.77)
 - `/output-style` deprecated (v2.1.73)
 - `/review` deprecated in favor of the `code-review` plugin
-- `/effort` command added with `max` level requiring Opus 4.7 (originally Opus 4.6-only)
+- `/effort` command added; `max` level available on Opus 4.6+ (originally Opus 4.6-only)
 - `/voice` command added for push-to-talk voice dictation
 - `/schedule` command added for creating/managing scheduled tasks
 - `/color` command added for prompt bar customization
@@ -142,12 +145,16 @@ These skills ship with Claude Code and are invoked like slash commands:
 - `/recap` command added to manually trigger session context recap (v2.1.108)
 - `/undo` added as alias for `/rewind` (v2.1.108)
 - `/proactive` added as alias for `/loop` (v2.1.105)
-- `/effort` gained interactive arrow-key slider and new `xhigh` level between `high` and `max`; default effort raised to `xhigh` for Opus 4.7 plans (v2.1.111)
+- `/effort` gained interactive arrow-key slider and new `xhigh` level between `high` and `max`; default effort raised to `xhigh` for Opus 4.7 plans (v2.1.111). On Opus 4.8 the default is `high` (v2.1.154)
 - `/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)
+- `/reload-skills` added — re-scan skill directories without restarting the session (v2.1.152)
+- `/model` now saves the selected model as the default for new sessions; press `s` for session-only (keybinding `modelPicker:setAsDefault` → `modelPicker:thisSessionOnly`) (v2.1.153)
+- `/workflows` added — view running and completed dynamic workflow runs (v2.1.154)
+- `/simplify` returned as a distinct cleanup-only review command (reuse / simplification / efficiency / altitude), separate from `/code-review`'s bug hunt (v2.1.154)
 
 ### `/goal` — Session-Level Completion Condition
 
@@ -620,19 +627,19 @@ If both exist with the same name, the **skill takes precedence**. Remove one or
 
 ---
 
-**Last Updated**: May 25, 2026
-**Claude Code Version**: 2.1.150
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **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://code.claude.com/docs/en/commands
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.118
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.116
+- https://code.claude.com/docs/en/model-config
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.139
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.141
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.144
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.145
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+- https://github.com/anthropics/claude-code/releases/tag/v2.1.152
+- https://github.com/anthropics/claude-code/releases/tag/v2.1.153
+- https://github.com/anthropics/claude-code/releases/tag/v2.1.154
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
 
 *Part of the [Claude How To](../) guide series*
diff --git a/02-memory/README.md b/02-memory/README.md
index b1288fd..5f7a29a 100644
--- a/02-memory/README.md
+++ b/02-memory/README.md
@@ -1198,12 +1198,12 @@ For the most up-to-date information, refer to the official Claude Code documenta
 - [Official Memory Docs](https://code.claude.com/docs/en/memory) - Anthropic documentation
 
 ---
-**Last Updated**: May 25, 2026
-**Claude Code Version**: 2.1.150
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/memory
 - https://code.claude.com/docs/en/settings
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.117
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.144
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.145
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
diff --git a/03-skills/README.md b/03-skills/README.md
index 0c388ab..7ff7e99 100644
--- a/03-skills/README.md
+++ b/03-skills/README.md
@@ -103,6 +103,8 @@ When skills share the same name across levels, higher-priority locations win: **
 
 **`--add-dir` directories**: Skills from directories added via `--add-dir` are loaded automatically with live change detection. Any edits to skill files in those directories take effect immediately without restarting Claude Code.
 
+**Reloading skills**: The `/reload-skills` command (added v2.1.152) re-scans all skill directories without restarting the session — useful after adding or editing a skill that isn't picked up by live detection. A `SessionStart` hook can trigger the same re-scan by returning `reloadSkills: true` (see [Hooks](../06-hooks/README.md)).
+
 **Description budget**: Skill descriptions (Level 1 metadata) are capped at **1% of the context window** (fallback: **8,000 characters**). If you have many skills installed, descriptions may be shortened. All skill names are always included, but descriptions are trimmed to fit. Front-load the key use case in descriptions. Override the budget with the `SLASH_COMMAND_TOOL_CHAR_BUDGET` environment variable.
 
 ## Creating Custom Skills
@@ -151,6 +153,7 @@ argument-hint: "[filename] [format]"        # Hint for autocomplete
 disable-model-invocation: true              # Only user can invoke
 user-invocable: false                       # Hide from slash menu
 allowed-tools: Read, Grep, Glob             # Restrict tool access
+disallowed-tools: Write, Edit               # Remove specific tools while active (v2.1.152)
 model: opus                                 # Specific model to use
 effort: high                                # Effort level override (low, medium, high, xhigh, max)
 context: fork                               # Run in isolated subagent
@@ -174,8 +177,9 @@ paths: "src/api/**/*.ts"               # Glob patterns limiting when skill activ
 | `disable-model-invocation` | `true` = only the user can invoke via `/name`. Claude will never auto-invoke. |
 | `user-invocable` | `false` = hidden from the `/` menu. Only Claude can invoke it automatically. |
 | `allowed-tools` | Comma-separated list of tools the skill may use without permission prompts. |
+| `disallowed-tools` | Comma-separated list of tools to remove while the skill is active (complements `allowed-tools`). Added v2.1.152. |
 | `model` | Model override while the skill is active (e.g., `opus`, `sonnet`). |
-| `effort` | Effort level override while the skill is active: `low`, `medium`, `high`, `xhigh`, or `max`. Available levels depend on the model — `xhigh` is the Claude Code default for Opus 4.7. |
+| `effort` | Effort level override while the skill is active: `low`, `medium`, `high`, `xhigh`, or `max`. Available levels depend on the model — the default effort is `high` on Opus 4.8 (`xhigh` on Opus 4.7). |
 | `context` | `fork` to run the skill in a forked subagent context with its own context window. |
 | `agent` | Subagent type when `context: fork` (e.g., `Explore`, `Plan`, `general-purpose`). |
 | `shell` | Shell used for `` !`command` `` substitutions and scripts: `bash` (default) or `powershell`. |
@@ -854,12 +858,13 @@ Once you start building skills seriously, two things become essential: a library
 - [Hooks Guide](../06-hooks/) - Event-driven automation
 
 ---
-**Last Updated**: May 25, 2026
-**Claude Code Version**: 2.1.150
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/skills
 - https://code.claude.com/docs/en/settings
 - https://code.claude.com/docs/en/changelog
 - https://code.claude.com/docs/en/commands
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.145
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+- https://github.com/anthropics/claude-code/releases/tag/v2.1.152
+- https://github.com/anthropics/claude-code/releases/tag/v2.1.154
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
diff --git a/04-subagents/README.md b/04-subagents/README.md
index a70d42a..e55ece2 100644
--- a/04-subagents/README.md
+++ b/04-subagents/README.md
@@ -1238,8 +1238,8 @@ See the OpenTelemetry section in [Advanced Features → Telemetry](../09-advance
 
 ---
 
-**Last Updated**: May 25, 2026
-**Claude Code Version**: 2.1.150
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/sub-agents
 - https://code.claude.com/docs/en/agent-teams
@@ -1248,4 +1248,4 @@ See the OpenTelemetry section in [Advanced Features → Telemetry](../09-advance
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.138
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.139
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.140
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
diff --git a/05-mcp/README.md b/05-mcp/README.md
index 66c8aec..f2ece3e 100644
--- a/05-mcp/README.md
+++ b/05-mcp/README.md
@@ -1168,11 +1168,11 @@ export GITHUB_TOKEN="your_token"
 
 ---
 
-**Last Updated**: May 25, 2026
-**Claude Code Version**: 2.1.150
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/mcp
 - https://code.claude.com/docs/en/changelog
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.117
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.139
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
diff --git a/06-hooks/README.md b/06-hooks/README.md
index 78becf8..bb6d4fb 100644
--- a/06-hooks/README.md
+++ b/06-hooks/README.md
@@ -191,7 +191,7 @@ Subagent-based verification hooks that spawn a dedicated agent to evaluate condi
 
 ## Hook Events
 
-Claude Code supports **29 hook events**:
+Claude Code supports **30 hook events**:
 
 | Event | When Triggered | Matcher Input | Can Block | Common Use |
 |-------|---------------|---------------|-----------|------------|
@@ -207,6 +207,7 @@ Claude Code supports **29 hook events**:
 | **PostToolUseFailure** | Tool execution fails | Tool name | No | Error handling, logging |
 | **PostToolBatch** | After a batch of tool uses completes | (none) | No | Aggregate reporting, batched validation |
 | **Notification** | Notification sent | Notification type | No | Custom notifications |
+| **MessageDisplay** | While assistant message text is displayed | (none) | No | Transform or hide displayed message text (v2.1.152) |
 | **SubagentStart** | Subagent spawned | Agent type name | No | Subagent setup |
 | **SubagentStop** | Subagent finishes | Agent type name | Yes | Subagent validation |
 | **Stop** | Claude finishes responding | (none) | Yes | Task completion check |
@@ -408,6 +409,19 @@ fi
 exit 0
 ```
 
+**Session-scoped outputs (v2.1.152):** A `SessionStart` hook can return JSON to re-scan skills and set the session title:
+
+```json
+{
+  "reloadSkills": true,
+  "hookSpecificOutput": {
+    "sessionTitle": "Payments migration"
+  }
+}
+```
+
+Top-level `reloadSkills: true` triggers a skill re-scan in the same session (the same action as the `/reload-skills` command), making skills the hook just installed available immediately. `hookSpecificOutput.sessionTitle` sets the session's display title on startup and resume.
+
 ### SessionEnd
 
 Runs when session ends to perform cleanup or final logging. Cannot block termination.
@@ -1262,6 +1276,7 @@ MCP tools follow the pattern `mcp__<server>__<tool>`:
 ### Security Notes
 
 - **Workspace trust required:** The `statusLine` and `fileSuggestion` hook output commands now require workspace trust acceptance before they take effect.
+- **Status-line terminal size (v2.1.153):** Status-line command scripts now receive `COLUMNS` and `LINES` environment variables, so a script can adapt its output to the terminal width/height (e.g. `[ "$COLUMNS" -lt 80 ] && short_output`).
 - **HTTP hooks and environment variables:** HTTP hooks require an explicit `allowedEnvVars` list to use environment variable interpolation in URLs. This prevents accidental leakage of sensitive environment variables to remote endpoints.
 - **Managed settings hierarchy:** The `disableAllHooks` setting now respects the managed settings hierarchy, meaning organization-level settings can enforce hook disablement that individual users cannot override.
 - **PowerShell auto-approve (v2.1.119):** PowerShell tool commands can be auto-approved in permission mode, matching Bash. This brings parity for Windows users running Claude Code with PowerShell-backed shell tools.
@@ -1434,16 +1449,13 @@ Edit `~/.claude/settings.json` or `.claude/settings.json` with the hook configur
 
 ---
 
-**Last Updated**: May 25, 2026
-**Claude Code Version**: 2.1.150
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/hooks
 - 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/v2.1.131
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.138
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.139
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.141
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.143
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.145
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+- https://github.com/anthropics/claude-code/releases/tag/v2.1.152
+- https://github.com/anthropics/claude-code/releases/tag/v2.1.153
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
diff --git a/07-plugins/README.md b/07-plugins/README.md
index 0414e50..c217c9d 100644
--- a/07-plugins/README.md
+++ b/07-plugins/README.md
@@ -1105,8 +1105,8 @@ The following Claude Code features work together with plugins:
 
 ---
 
-**Last Updated**: May 25, 2026
-**Claude Code Version**: 2.1.150
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/plugins
 - https://code.claude.com/docs/en/plugin-marketplaces
@@ -1118,4 +1118,4 @@ The following Claude Code features work together with plugins:
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.141
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.142
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.143
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
diff --git a/07-plugins/devops-automation/README.md b/07-plugins/devops-automation/README.md
index 3368d66..aaa5368 100644
--- a/07-plugins/devops-automation/README.md
+++ b/07-plugins/devops-automation/README.md
@@ -108,10 +108,10 @@ Result:
 
 ---
 
-**Last Updated**: May 9, 2026
-**Claude Code Version**: 2.1.138
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/plugins
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.131
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.138
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
diff --git a/07-plugins/documentation/README.md b/07-plugins/documentation/README.md
index af257b4..7202438 100644
--- a/07-plugins/documentation/README.md
+++ b/07-plugins/documentation/README.md
@@ -120,10 +120,10 @@ export GITHUB_TOKEN="your_github_token"
 
 ---
 
-**Last Updated**: May 9, 2026
-**Claude Code Version**: 2.1.138
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/plugins
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.131
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.138
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
diff --git a/07-plugins/pr-review/README.md b/07-plugins/pr-review/README.md
index 3766c97..986bce8 100644
--- a/07-plugins/pr-review/README.md
+++ b/07-plugins/pr-review/README.md
@@ -92,10 +92,10 @@ Result:
 
 ---
 
-**Last Updated**: May 9, 2026
-**Claude Code Version**: 2.1.138
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/plugins
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.131
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.138
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
diff --git a/08-checkpoints/README.md b/08-checkpoints/README.md
index 762b361..0999e39 100644
--- a/08-checkpoints/README.md
+++ b/08-checkpoints/README.md
@@ -325,10 +325,10 @@ Remember: checkpoints are not a replacement for git. Use checkpoints for rapid e
 
 ---
 
-**Last Updated**: May 25, 2026
-**Claude Code Version**: 2.1.150
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/checkpointing
 - https://code.claude.com/docs/en/settings
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.117
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
diff --git a/08-checkpoints/checkpoint-examples.md b/08-checkpoints/checkpoint-examples.md
index 312fb5b..131c051 100644
--- a/08-checkpoints/checkpoint-examples.md
+++ b/08-checkpoints/checkpoint-examples.md
@@ -339,9 +339,9 @@ User: Now let's continue with the approach that worked.
 6. **Summarize long sessions**: Use "Summarize from here" to keep conversations manageable
 
 ---
-**Last Updated**: May 20, 2026
-**Claude Code Version**: 2.1.145
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/checkpointing
 - https://code.claude.com/docs/en/changelog
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
diff --git a/09-advanced-features/README.md b/09-advanced-features/README.md
index fede3fb..ac22810 100644
--- a/09-advanced-features/README.md
+++ b/09-advanced-features/README.md
@@ -16,27 +16,28 @@ Comprehensive guide to Claude Code's advanced capabilities including planning mo
 5. [Auto Mode](#auto-mode)
 6. [Background Tasks](#background-tasks)
 7. [Monitor Tool (Event-Driven Streams)](#monitor-tool-event-driven-streams)
-8. [Scheduled Tasks](#scheduled-tasks)
-9. [Permission Modes](#permission-modes)
-10. [Headless Mode](#headless-mode)
-11. [Session Management](#session-management)
-12. [Interactive Features](#interactive-features)
-13. [TUI Mode (Fullscreen)](#tui-mode-fullscreen)
-14. [Voice Dictation](#voice-dictation)
-15. [Channels](#channels)
-16. [Chrome Integration](#chrome-integration)
-17. [Remote Control](#remote-control)
-18. [Web Sessions](#web-sessions)
-19. [Desktop App](#desktop-app)
-20. [Task List](#task-list)
-21. [Prompt Suggestions](#prompt-suggestions)
-22. [Git Worktrees](#git-worktrees)
-23. [Sandboxing](#sandboxing)
-24. [Managed Settings (Enterprise)](#managed-settings-enterprise)
-25. [Configuration and Settings](#configuration-and-settings)
-26. [Agent Teams](#agent-teams)
-27. [Best Practices](#best-practices)
-28. [Additional Resources](#additional-resources)
+8. [Dynamic Workflows](#dynamic-workflows)
+9. [Scheduled Tasks](#scheduled-tasks)
+10. [Permission Modes](#permission-modes)
+11. [Headless Mode](#headless-mode)
+12. [Session Management](#session-management)
+13. [Interactive Features](#interactive-features)
+14. [TUI Mode (Fullscreen)](#tui-mode-fullscreen)
+15. [Voice Dictation](#voice-dictation)
+16. [Channels](#channels)
+17. [Chrome Integration](#chrome-integration)
+18. [Remote Control](#remote-control)
+19. [Web Sessions](#web-sessions)
+20. [Desktop App](#desktop-app)
+21. [Task List](#task-list)
+22. [Prompt Suggestions](#prompt-suggestions)
+23. [Git Worktrees](#git-worktrees)
+24. [Sandboxing](#sandboxing)
+25. [Managed Settings (Enterprise)](#managed-settings-enterprise)
+26. [Configuration and Settings](#configuration-and-settings)
+27. [Agent Teams](#agent-teams)
+28. [Best Practices](#best-practices)
+29. [Additional Resources](#additional-resources)
 
 ---
 
@@ -278,8 +279,8 @@ Extended thinking is a deliberate, step-by-step reasoning process where Claude:
 - `Option + T` (macOS) / `Alt + T` (Windows/Linux) - Toggle extended thinking
 
 **Automatic activation**:
-- Enabled by default for all models (Opus 4.7, Sonnet 4.6, Haiku 4.5)
-- Opus 4.7: Adaptive reasoning with effort levels: `low` (○), `medium` (◐), `high` (●), `xhigh` (Opus 4.7 only, default on Claude Code since Opus 4.7 launch, 2026-04-16), `max`. Opus 4.6 and Sonnet 4.6 also support `low`, `medium`, `high`, `max` (no `xhigh`). Opus 4.7 has a 1M-token native context window (1M context fix landed in v2.1.117 — before that, `/context` miscounted Opus 4.7 against a 200K window and triggered premature autocompact). Since v2.1.129, `/context` shows its visualization in-UI only; the ASCII viz no longer leaks into the conversation context (~1.6k tokens saved per call), so `/context` is safe to invoke freely.
+- Enabled by default for all models (Opus 4.8, Opus 4.7, Sonnet 4.6, Haiku 4.5)
+- Opus 4.8: Adaptive reasoning with effort levels: `low` (○), `medium` (◐), `high` (●), `xhigh`, `max`. The default is `high` on Opus 4.8 (v2.1.154), Opus 4.6, and Sonnet 4.6, and `xhigh` on Opus 4.7. `xhigh` is available on Opus 4.8 and Opus 4.7 (it falls back to `high` on Opus 4.6 / Sonnet 4.6). `max` works on Opus 4.8/4.7/4.6 and Sonnet 4.6 (session-only). Haiku 4.5 has no effort levels. Opus 4.8 and Opus 4.7 have a 1M-token native context window (1M context fix landed in v2.1.117 — before that, `/context` miscounted Opus 4.7 against a 200K window and triggered premature autocompact). Since v2.1.129, `/context` shows its visualization in-UI only; the ASCII viz no longer leaks into the conversation context (~1.6k tokens saved per call), so `/context` is safe to invoke freely.
 - Pro/Max subscribers on Opus 4.6 / Sonnet 4.6: default effort was raised from `medium` to `high` in v2.1.117.
 - Other models: Fixed budget up to 31,999 tokens
 
@@ -293,9 +294,9 @@ Extended thinking is a deliberate, step-by-step reasoning process where Claude:
 export MAX_THINKING_TOKENS=1024
 ```
 
-**Effort level** (supported on Opus 4.7, Opus 4.6, and Sonnet 4.6):
+**Effort level** (supported on Opus 4.8, Opus 4.7, Opus 4.6, and Sonnet 4.6 — not Haiku 4.5):
 ```bash
-export CLAUDE_CODE_EFFORT_LEVEL=xhigh   # low (○), medium (◐), high (●), xhigh (Opus 4.7 only, default), or max
+export CLAUDE_CODE_EFFORT_LEVEL=high   # low (○), medium (◐), high (●), xhigh (Opus 4.8/4.7), or max — default is high on Opus 4.8
 ```
 
 **CLI flag**:
@@ -308,7 +309,7 @@ claude --effort high "complex architectural review"
 /effort high
 ```
 
-> **Note:** The keyword "ultrathink" in prompts activates deep reasoning mode. Effort levels `low`, `medium`, `high`, and `max` are supported on Opus 4.7, Opus 4.6, and Sonnet 4.6. `xhigh` (default on Opus 4.7) is Opus 4.7 only.
+> **Note:** The keyword "ultrathink" in prompts activates deep reasoning mode. Effort levels `low`, `medium`, `high`, and `max` are supported on Opus 4.8, Opus 4.7, Opus 4.6, and Sonnet 4.6 (Haiku 4.5 has none). `xhigh` is available on Opus 4.8 and Opus 4.7. The default effort is `high` on Opus 4.8 (and Opus 4.6 / Sonnet 4.6) and `xhigh` on Opus 4.7. The `/effort` menu also offers `ultracode`, which is **not** a model effort level — it sends `xhigh` and has Claude orchestrate dynamic workflows (session-only).
 
 ### Benefits of Extended Thinking
 
@@ -396,12 +397,14 @@ Extended thinking is controlled via environment variables, keyboard shortcuts, a
 # Set thinking token budget
 export MAX_THINKING_TOKENS=16000
 
-# Set effort level (Opus 4.7, Opus 4.6, Sonnet 4.6): low (○), medium (◐), high (●), xhigh (Opus 4.7 only, default), or max
-export CLAUDE_CODE_EFFORT_LEVEL=xhigh
+# Set effort level (Opus 4.8, Opus 4.7, Opus 4.6, Sonnet 4.6): low (○), medium (◐), high (●), xhigh (Opus 4.8/4.7), or max — default is high on Opus 4.8
+export CLAUDE_CODE_EFFORT_LEVEL=high
 ```
 
 Toggle during a session with `Alt+T` / `Option+T`, set effort with `/effort`, or configure via `/config`.
 
+> **Lean system prompt (v2.1.154):** The lean system prompt is now the **default** for all models except Haiku, Sonnet, and Opus 4.7-and-earlier, reducing baseline token overhead on Opus 4.8.
+
 ---
 
 ## Auto Mode
@@ -411,7 +414,7 @@ Auto Mode is a Research Preview permission mode (March 2026) that uses a backgro
 ### Requirements
 
 - **Plan**: Team, Enterprise, or API (not available on Pro or Max plans)
-- **Model**: Claude Sonnet 4.6 or Opus 4.7
+- **Model**: Claude Sonnet 4.6 or Opus 4.8
 - **Provider**: Anthropic API only (not supported on Bedrock, Vertex, or Foundry)
 - **Classifier**: Runs on Claude Sonnet 4.6 (adds extra token cost)
 
@@ -728,6 +731,30 @@ done
 
 ---
 
+## Dynamic Workflows
+
+> **New in v2.1.154**
+
+Dynamic workflows let Claude orchestrate tens to hundreds of background [subagents](../04-subagents/README.md) **deterministically** — fan-out, pipelines, and parallel stages encoded in a script rather than left to the model's improvisation. Where a single agent holds one context window, a workflow decomposes a task across many agents and recombines their results.
+
+### When to Use Them
+
+- **Comprehensive coverage** — audit or review across many files/dimensions in parallel.
+- **Confidence** — generate independent perspectives, then adversarially verify findings before committing.
+- **Scale beyond one context** — large migrations, broad sweeps, or research that no single context can hold.
+
+For a one-off task you already understand, a single agent (or a direct edit) is still the right tool — workflows pay off when the work fans out.
+
+### Launching and Viewing
+
+- **Launch**: ask Claude to create a workflow for the task (e.g. "run a workflow to review every file in `src/`"). Claude authors the orchestration script and runs it in the background.
+- **View**: the `/workflows` command shows running and completed workflow runs with live progress.
+- **`ultracode`**: selecting `ultracode` in the `/effort` menu turns this on for the session — it sends `xhigh` to the model *and* has Claude orchestrate dynamic workflows by default. It is session-only and not accepted in the settings file.
+
+Workflows build on the subagent model — see [Subagents](../04-subagents/README.md) for how individual agents are defined and scoped.
+
+---
+
 ## Scheduled Tasks
 
 Scheduled Tasks let you run prompts automatically on a recurring schedule or as one-time reminders. Tasks are session-scoped — they run while Claude Code is active and are cleared when the session ends. Available since v2.1.72+.
@@ -2043,8 +2070,8 @@ Override config with environment variables:
 
 ```bash
 # Model selection
-export ANTHROPIC_MODEL=claude-opus-4-7
-export ANTHROPIC_DEFAULT_OPUS_MODEL=claude-opus-4-7
+export ANTHROPIC_MODEL=claude-opus-4-8
+export ANTHROPIC_DEFAULT_OPUS_MODEL=claude-opus-4-8
 export ANTHROPIC_DEFAULT_SONNET_MODEL=claude-sonnet-4-6
 export ANTHROPIC_DEFAULT_HAIKU_MODEL=claude-haiku-4-5
 
@@ -2053,7 +2080,7 @@ export ANTHROPIC_API_KEY=sk-ant-...
 
 # Thinking configuration
 export MAX_THINKING_TOKENS=16000
-export CLAUDE_CODE_EFFORT_LEVEL=xhigh   # low, medium, high, xhigh (Opus 4.7 only, default), or max (supported on Opus 4.7, Opus 4.6, Sonnet 4.6)
+export CLAUDE_CODE_EFFORT_LEVEL=high   # low, medium, high, xhigh (Opus 4.8/4.7), or max — default is high on Opus 4.8 (supported on Opus 4.8, Opus 4.7, Opus 4.6, Sonnet 4.6)
 
 # Feature toggles
 export CLAUDE_CODE_DISABLE_AUTO_MEMORY=true
@@ -2267,18 +2294,17 @@ For more information about Claude Code and related features:
 
 ---
 
-**Last Updated**: May 25, 2026
-**Claude Code Version**: 2.1.150
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/permission-modes
 - https://code.claude.com/docs/en/interactive-mode
 - https://code.claude.com/docs/en/settings
 - https://code.claude.com/docs/en/cli-reference
-- https://www.anthropic.com/news/claude-opus-4-7
+- https://code.claude.com/docs/en/model-config
+- https://www.anthropic.com/news/claude-opus-4-8
 - https://claude.com/blog/introducing-routines-in-claude-code
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.117
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.118
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.139
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.141
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.143
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+- https://github.com/anthropics/claude-code/releases/tag/v2.1.154
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
diff --git a/09-advanced-features/planning-mode-examples.md b/09-advanced-features/planning-mode-examples.md
index 91a9de6..f3cdce1 100644
--- a/09-advanced-features/planning-mode-examples.md
+++ b/09-advanced-features/planning-mode-examples.md
@@ -533,9 +533,9 @@ Proceed with this plan? (yes/no/modify)
 7. **Plan for testing** at each phase
 
 ---
-**Last Updated**: May 20, 2026
-**Claude Code Version**: 2.1.145
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/changelog
 - https://code.claude.com/docs/en/best-practices
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
diff --git a/10-cli/README.md b/10-cli/README.md
index 36b74c2..5c38e32 100644
--- a/10-cli/README.md
+++ b/10-cli/README.md
@@ -134,7 +134,7 @@ claude -p "list todos" | grep "URGENT"
 ### Model Selection Examples
 
 ```bash
-# Use Opus 4.7 for complex tasks
+# Use Opus 4.8 for complex tasks
 claude --model opus "design a caching strategy"
 
 # Use Haiku 4.5 for quick tasks
@@ -747,9 +747,9 @@ Claude Code supports multiple models with different capabilities:
 
 | Model | ID | Context Window | Notes |
 |-------|-----|----------------|-------|
-| Opus 4.7 | `claude-opus-4-7` | 1M tokens (1M context fix landed in v2.1.117) | Most capable, adaptive effort levels; `xhigh` is the default effort on Claude Code since Opus 4.7 launch (2026-04-16) |
+| Opus 4.8 | `claude-opus-4-8` | 1M tokens | Most capable; adaptive effort levels `low → max`; default effort `high` (v2.1.154) |
 | Sonnet 4.6 | `claude-sonnet-4-6` | 1M tokens | Balanced speed and capability; default effort for Pro/Max subscribers raised from `medium` to `high` in v2.1.117 |
-| Haiku 4.5 | `claude-haiku-4-5` | 1M tokens | Fastest, best for quick tasks |
+| Haiku 4.5 | `claude-haiku-4-5` | 200K tokens | Fastest, best for quick tasks; no effort levels |
 
 ### Model Selection
 
@@ -766,24 +766,24 @@ claude --model opusplan "design and implement the API"
 /fast
 ```
 
-> **Fast Mode default flipped to Opus 4.7 (v2.1.142)**: As of v2.1.142, `/fast` runs Opus 4.7 by default (was Opus 4.6 before). To opt back into Opus 4.6 for Fast Mode, export `CLAUDE_CODE_OPUS_4_6_FAST_MODE_OVERRIDE=1`.
+> **Fast Mode now runs on Opus 4.8 (v2.1.154)**: As of v2.1.154, `/fast` runs **Opus 4.8** by default as a research preview — about 2× the standard rate for ~2.5× the output speed. It previously flipped from Opus 4.6 to Opus 4.7 in v2.1.142. The `CLAUDE_CODE_OPUS_4_6_FAST_MODE_OVERRIDE` env var was **deprecated in v2.1.154 and removed on 2026-06-01**; to use fast mode on Opus 4.6 now, run `/model claude-opus-4-6[1m]` then `/fast on`.
 
-### Effort Levels (Opus 4.7)
+### Effort Levels (Opus 4.8 / Opus 4.7)
 
-Opus 4.7 supports adaptive reasoning with effort levels, ordered from lightest to heaviest: `low` (○), `medium` (◐), `high` (●), `xhigh` (default on Claude Code since Opus 4.7 launch, 2026-04-16), and `max` (Opus 4.7 only). On Opus 4.6 / Sonnet 4.6, the default effort for Pro/Max subscribers was raised from `medium` to `high` in v2.1.117.
+Opus 4.8 and Opus 4.7 support adaptive reasoning with effort levels, ordered from lightest to heaviest: `low` (○), `medium` (◐), `high` (●), `xhigh`, and `max`. The **default** is `high` on Opus 4.8 (since v2.1.154), Opus 4.6, and Sonnet 4.6, and `xhigh` on Opus 4.7. `xhigh` is available on Opus 4.8 and Opus 4.7; `max` works on Opus 4.8/4.7/4.6 and Sonnet 4.6 (session-only). Haiku 4.5 has no effort levels. On Opus 4.6 / Sonnet 4.6, the default effort for Pro/Max subscribers was raised from `medium` to `high` in v2.1.117.
 
 ```bash
 # Set effort level via CLI flag
-claude --effort xhigh "complex review"
+claude --effort high "complex review"
 
 # Set effort level via slash command
-/effort xhigh
+/effort high
 
 # Set effort level via environment variable
-export CLAUDE_CODE_EFFORT_LEVEL=xhigh   # low, medium, high, xhigh (default on Opus 4.7), or max (Opus 4.7 only)
+export CLAUDE_CODE_EFFORT_LEVEL=high   # low, medium, high, xhigh (Opus 4.8/4.7), or max — default is high on Opus 4.8
 ```
 
-The "ultrathink" keyword in prompts activates deep reasoning. The `max` effort level is exclusive to Opus 4.7.
+The "ultrathink" keyword in prompts activates deep reasoning. The `/effort` menu also offers `ultracode`, which is **not** a model effort level — it sends `xhigh` and has Claude orchestrate dynamic workflows (session-only).
 
 ---
 
@@ -798,7 +798,7 @@ The "ultrathink" keyword in prompts activates deep reasoning. The `max` effort l
 | `ANTHROPIC_DEFAULT_SONNET_MODEL` | Override default Sonnet model ID |
 | `ANTHROPIC_DEFAULT_HAIKU_MODEL` | Override default Haiku model ID |
 | `MAX_THINKING_TOKENS` | Set extended thinking token budget |
-| `CLAUDE_CODE_EFFORT_LEVEL` | Set effort level (`low`/`medium`/`high`/`xhigh`/`max`) — `xhigh` is the default on Opus 4.7; `max` is Opus 4.7 only |
+| `CLAUDE_CODE_EFFORT_LEVEL` | Set effort level (`low`/`medium`/`high`/`xhigh`/`max`) — default is `high` on Opus 4.8 (`xhigh` on Opus 4.7); `xhigh` needs Opus 4.8/4.7; `max` works on Opus 4.8/4.7/4.6 and Sonnet 4.6 |
 | `CLAUDE_CODE_SIMPLE` | Minimal mode, set by `--bare` flag |
 | `CLAUDE_CODE_DISABLE_AUTO_MEMORY` | Disable automatic CLAUDE.md updates |
 | `CLAUDE_CODE_DISABLE_BACKGROUND_TASKS` | Disable background task execution |
@@ -833,7 +833,7 @@ The "ultrathink" keyword in prompts activates deep reasoning. The `max` effort l
 | `CLAUDE_CODE_FORCE_SYNC_OUTPUT` | Set to `1` to force synchronous output for terminals where auto-detection misses (e.g., Emacs `eat`) (v2.1.129+) |
 | `CLAUDE_CODE_PACKAGE_MANAGER_AUTO_UPDATE` | Set to `1` to enable background upgrades for Homebrew/WinGet installs (which normally do not auto-update) (v2.1.129+) |
 | `CLAUDE_CODE_ENABLE_GATEWAY_MODEL_DISCOVERY` | Set to `1` to opt in to gateway `/v1/models` discovery when `ANTHROPIC_BASE_URL` is set. Without it, `/model` shows the built-in static list (v2.1.129+) |
-| `CLAUDE_CODE_OPUS_4_6_FAST_MODE_OVERRIDE` | Set to `1` to pin Fast Mode (`/fast`) back to Opus 4.6. The default flipped to Opus 4.7 in v2.1.142. |
+| `CLAUDE_CODE_OPUS_4_6_FAST_MODE_OVERRIDE` | **Deprecated (removed 2026-06-01).** Previously pinned Fast Mode (`/fast`) to Opus 4.6. To use fast mode on Opus 4.6 now, run `/model claude-opus-4-6[1m]` then `/fast on`. |
 
 > **`ENABLE_TOOL_SEARCH` on Vertex AI (v2.1.119+)**: Tool search is **disabled by default on Google Cloud Vertex AI** deployments. Users who want the tool-search capability on Vertex must explicitly opt in with `export ENABLE_TOOL_SEARCH=true`. On direct Anthropic API it remains enabled by default.
 
@@ -941,23 +941,17 @@ claude -p --output-format json "query"
 
 ---
 
-**Last Updated**: May 25, 2026
-**Claude Code Version**: 2.1.150
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/cli-reference
 - https://code.claude.com/docs/en/settings
 - https://code.claude.com/docs/en/changelog
-- https://code.claude.com/docs/en/agent-view
-- https://www.anthropic.com/news/claude-opus-4-7
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.113
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.116
+- https://code.claude.com/docs/en/model-config
+- https://platform.claude.com/docs/en/about-claude/models/overview
+- https://www.anthropic.com/news/claude-opus-4-8
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.117
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.118
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.131
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.138
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.139
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.141
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.142
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.143
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.145
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+- https://github.com/anthropics/claude-code/releases/tag/v2.1.154
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
diff --git a/CATALOG.md b/CATALOG.md
index 3b39f0e..41429d6 100644
--- a/CATALOG.md
+++ b/CATALOG.md
@@ -67,6 +67,8 @@ Commands are user-invoked shortcuts that execute specific actions.
 | `/sandbox` | Toggle sandbox mode | Safe command execution |
 | `/doctor` | Run diagnostics | Troubleshoot issues |
 | `/reload-plugins` | Reload installed plugins | Plugin management |
+| `/reload-skills` | Re-scan skill directories without restarting (v2.1.152) | Skill management |
+| `/workflows` | View running and completed dynamic workflow runs (v2.1.154) | Multi-agent orchestration |
 | `/release-notes` | Show release notes | Check new features |
 | `/remote-control` | Enable remote control | Remote access |
 | `/permissions` | Manage permissions | Control access |
@@ -246,7 +248,8 @@ cp -r 03-skills/* ~/.claude/skills/
 | `/loop` | Run prompts on interval | Recurring tasks |
 | `/run` *(v2.1.145+)* | Launch this project's app to see a change running | Verifying a change in the real app |
 | `/run-skill-generator` *(v2.1.145+)* | Teach `/run`/`/verify` how to handle a specific project | First-time project setup for `/run` |
-| `/code-review` *(renamed from `/simplify` in v2.1.146)* | Review the current diff for correctness bugs at a chosen effort level (e.g. `/code-review high`); pass `--comment` to post findings as inline PR comments | After writing code, before landing a PR |
+| `/code-review` | Review the current diff for correctness bugs at a chosen effort level (e.g. `/code-review high`); pass `--comment` to post findings as inline PR comments | After writing code, before landing a PR |
+| `/simplify` *(distinct again since v2.1.154)* | Cleanup-only review (reuse / simplification / efficiency / altitude) that applies the fixes; does not hunt bugs | Tidying code without a bug hunt |
 | `/verify` *(v2.1.145+)* | Build, run, and observe the app to confirm a fix works | Validating a fix end-to-end |
 
 ---
@@ -538,13 +541,12 @@ chmod +x ~/.claude/hooks/*.sh
 
 ---
 
-**Last Updated**: May 25, 2026
-**Claude Code Version**: 2.1.150
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/overview
 - https://code.claude.com/docs/en/commands
 - https://code.claude.com/docs/en/hooks
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.144
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.145
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.143
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+- https://github.com/anthropics/claude-code/releases/tag/v2.1.154
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
diff --git a/INDEX.md b/INDEX.md
index 185f217..f5bb571 100644
--- a/INDEX.md
+++ b/INDEX.md
@@ -367,6 +367,7 @@ Advanced capabilities for complex workflows.
 | `README.md` | Complete guide | All advanced features documentation |
 | `config-examples.json` | Configuration examples | 10+ use-case-specific configurations |
 | `planning-mode-examples.md` | Planning examples | REST API, database migration, refactoring |
+| Dynamic Workflows | Deterministic multi-agent orchestration via `/workflows` (v2.1.154) | Comprehensive audits, migrations, scale-out |
 | Scheduled Tasks | Recurring tasks with `/loop` and cron tools | Automated recurring workflows |
 | Chrome Integration | Browser automation via headless Chromium | Web testing and scraping |
 | Remote Control (expanded) | Connection methods, security, comparison table | Remote session management |
@@ -391,6 +392,11 @@ Advanced capabilities for complex workflows.
 - Parallel development workflows
 - Task management and monitoring
 
+### Dynamic Workflows (v2.1.154)
+- Deterministic orchestration of tens-to-hundreds of background subagents
+- Fan-out / pipeline / parallel stages for comprehensive coverage
+- View runs with `/workflows`; `ultracode` `/effort` turns it on for a session
+
 ### Permission Modes
 - **default**: Ask for approval on risky actions
 - **acceptEdits**: Auto-accept file edits, ask for others
@@ -459,7 +465,7 @@ Command-line interface usage patterns and reference.
 - `claude` - Start interactive session
 - `claude -p "prompt"` - Headless/non-interactive mode
 - `claude web` - Launch web session
-- `claude --model` - Select model (Sonnet 4.6, Opus 4.7, Haiku 4.5)
+- `claude --model` - Select model (Sonnet 4.6, Opus 4.8, Haiku 4.5)
 - `claude --permission-mode` - Set permission mode
 - `claude --remote` - Enable remote control via WebSocket
 
@@ -874,15 +880,15 @@ Want to add more examples? Follow the structure:
 
 ---
 
-**Last Updated**: May 25, 2026
-**Claude Code Version**: 2.1.150
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/overview
 - https://code.claude.com/docs/en/hooks
 - https://code.claude.com/docs/en/commands
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.144
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.145
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+- https://github.com/anthropics/claude-code/releases/tag/v2.1.153
+- https://github.com/anthropics/claude-code/releases/tag/v2.1.154
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
 **Total Examples**: 100+ files
 **Categories**: 10 features
 **Hooks**: 9 automation scripts
diff --git a/LEARNING-ROADMAP.md b/LEARNING-ROADMAP.md
index 87e926c..aaad326 100644
--- a/LEARNING-ROADMAP.md
+++ b/LEARNING-ROADMAP.md
@@ -738,14 +738,14 @@ Once you've completed all milestones:
 
 ---
 
-**Last Updated**: May 25, 2026
-**Claude Code Version**: 2.1.150
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/overview
 - https://code.claude.com/docs/en/hooks
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.144
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.145
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
 **Maintained by**: Claude How-To Contributors
 **License**: Educational purposes, free to use and adapt
 
diff --git a/QUICK_REFERENCE.md b/QUICK_REFERENCE.md
index 3c3ccae..2636e56 100644
--- a/QUICK_REFERENCE.md
+++ b/QUICK_REFERENCE.md
@@ -130,7 +130,7 @@ claude -r "session"    # Resume session by name/ID
 | **Git Worktrees** | Built-in | `/worktree` |
 | **Auto Memory** | Built-in | Auto-saves to CLAUDE.md |
 | **Task List** | Built-in | `/task list` |
-| **Bundled Skills (9)** | Built-in | `/batch`, `/claude-api`, `/code-review` *(renamed from `/simplify` in v2.1.146)*, `/debug`, `/fewer-permission-prompts`, `/loop`, `/run` *(v2.1.145+)*, `/run-skill-generator` *(v2.1.145+)*, `/verify` *(v2.1.145+)* |
+| **Bundled Skills (10)** | Built-in | `/batch`, `/claude-api`, `/code-review`, `/simplify` *(cleanup-only review; distinct from `/code-review` again since v2.1.154)*, `/debug`, `/fewer-permission-prompts`, `/loop`, `/run` *(v2.1.145+)*, `/run-skill-generator` *(v2.1.145+)*, `/verify` *(v2.1.145+)* |
 
 ---
 
@@ -398,8 +398,9 @@ cp -r 03-skills/code-review-specialist ~/.claude/skills/
 | **Task List** | Manage background tasks | `/task list`, `/task status <id>` |
 | **Auto Memory** | Automatic memory saving from conversations | Claude auto-saves key context to CLAUDE.md |
 | **Git Worktrees** | Isolated workspaces for parallel development | `/worktree` to create isolated workspace |
-| **Model Selection** | Switch between Sonnet 4.6, Opus 4.7, and Haiku 4.5 | `/model` — session-only by default since v2.1.144; press `d` to set a new default |
+| **Model Selection** | Switch between Sonnet 4.6, Opus 4.8, and Haiku 4.5 | `/model` — since v2.1.153 the choice is saved as the default for new sessions; press `s` for session-only |
 | **Agent Teams** | Coordinate multiple agents on tasks | Enable with `CLAUDE_AGENT_TEAMS=1` env var |
+| **Dynamic Workflows** *(v2.1.154)* | Deterministic multi-agent orchestration | `/workflows` to view runs; ask Claude to create one |
 | **Scheduled Tasks** | Recurring tasks with `/loop` | `/loop 5m /command` or CronCreate tool |
 | **Chrome Integration** | Browser automation | `--chrome` flag or `/chrome` command |
 | **Keyboard Customization** | Custom keybindings | `/keybindings` command |
@@ -508,12 +509,12 @@ Getting started checklist:
 **This Card**: Keep it handy for quick reference!
 
 ---
-**Last Updated**: May 25, 2026
-**Claude Code Version**: 2.1.150
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/overview
 - https://code.claude.com/docs/en/hooks
 - https://code.claude.com/docs/en/commands
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.144
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.145
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+- https://github.com/anthropics/claude-code/releases/tag/v2.1.153
+- https://github.com/anthropics/claude-code/releases/tag/v2.1.154
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
diff --git a/README.md b/README.md
index 12a7e88..57c4217 100644
--- a/README.md
+++ b/README.md
@@ -210,7 +210,7 @@ The official docs are a feature reference. This guide is a tutorial with diagram
 11-13 hours for the full path. But you'll get immediate value in 15 minutes — just copy a slash command template and try it.
 
 **Can I use this with Claude Sonnet / Haiku / Opus?**
-Yes. All templates work with Claude Sonnet 4.6, Claude Opus 4.7, and Claude Haiku 4.5.
+Yes. All templates work with Claude Sonnet 4.6, Claude Opus 4.8, and Claude Haiku 4.5.
 
 **Can I contribute?**
 Absolutely. See [CONTRIBUTING.md](CONTRIBUTING.md) for guidelines. We welcome new examples, bug fixes, documentation improvements, and community templates.
@@ -871,15 +871,12 @@ MIT License - see [LICENSE](LICENSE). Free to use, modify, and distribute. The o
 
 ---
 
-**Last Updated**: May 25, 2026
-**Claude Code Version**: 2.1.150
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/overview
 - https://code.claude.com/docs/en/changelog
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.131
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.138
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.143
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.144
+- https://platform.claude.com/docs/en/about-claude/models/overview
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.145
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.113
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+- https://github.com/anthropics/claude-code/releases/tag/v2.1.154
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
diff --git a/STYLE_GUIDE.md b/STYLE_GUIDE.md
index af46921..c2a524b 100644
--- a/STYLE_GUIDE.md
+++ b/STYLE_GUIDE.md
@@ -597,9 +597,9 @@ Lesson READMEs end with a metadata block:
 
 ```markdown
 ---
-**Last Updated**: May 25, 2026
-**Claude Code Version**: 2.1.150
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
 ```
 
 - Use month + day + year format (e.g., "May 20, 2026")
@@ -631,11 +631,11 @@ Before submitting content, verify:
 
 ---
 
-**Last Updated**: May 25, 2026
-**Claude Code Version**: 2.1.150
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/overview
 - https://code.claude.com/docs/en/changelog
-- https://www.anthropic.com/news/claude-opus-4-7
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.145
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+- https://www.anthropic.com/news/claude-opus-4-8
+- https://github.com/anthropics/claude-code/releases/tag/v2.1.154
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
diff --git a/claude_concepts_guide.md b/claude_concepts_guide.md
index 6fca89e..085567a 100644
--- a/claude_concepts_guide.md
+++ b/claude_concepts_guide.md
@@ -3123,15 +3123,18 @@ Complete configuration example:
 
 ## Models and Reasoning Effort
 
-Claude Code supports three models with adaptive reasoning effort:
+Claude Code supports the following models with adaptive reasoning effort:
 
 | Model | Context Window | Effort Levels | Default Effort (Claude Code) |
 |-------|----------------|---------------|------------------------------|
-| Claude Opus 4.7 | 1M tokens (native) | `low`, `medium`, `high`, `xhigh`, `max` | `xhigh` (since Opus 4.7 launch, 2026-04-16) |
+| Claude Opus 4.8 | 1M tokens (native) | `low`, `medium`, `high`, `xhigh`, `max` | `high` (since v2.1.154) |
+| Claude Opus 4.7 (legacy) | 1M tokens (native) | `low`, `medium`, `high`, `xhigh`, `max` | `xhigh` (since Opus 4.7 launch, 2026-04-16) |
 | Claude Sonnet 4.6 | 1M tokens | `low`, `medium`, `high`, `max` | `high` for Pro/Max subscribers (raised from `medium` in v2.1.117) |
-| Claude Haiku 4.5 | 200K tokens | `low`, `medium`, `high` | `medium` |
+| Claude Haiku 4.5 | 200K tokens | — (no effort support) | — |
 
-> **Note**: v2.1.117 fixed a bug where Opus 4.7 sessions computed `/context` against 200K instead of the native 1M window — upgrade to v2.1.117 or later to actually get the 1M context on Opus 4.7.
+> **Note**: `xhigh` is available on Opus 4.8 and Opus 4.7; `max` works on Opus 4.8/4.7/4.6 and Sonnet 4.6 (session-only). Haiku 4.5 does not support effort levels.
+
+> **Note**: v2.1.117 fixed a bug where Opus 4.7 sessions computed `/context` against 200K instead of the native 1M window — upgrade to v2.1.117 or later to actually get the 1M context on Opus 4.7. Opus 4.8 also has a native 1M-token window.
 
 > **Note**: `/cost` and `/stats` merged into `/usage` in v2.1.118. `/usage` is now the canonical command with tabs for cost/stats/etc.; `/cost` and `/stats` remain as shortcut aliases that open the corresponding tab. As of v2.1.149, the cost view also breaks spending down by category (skills, subagents, plugins, and per-MCP-server costs).
 
@@ -3143,12 +3146,13 @@ Claude Code supports three models with adaptive reasoning effort:
 - [Anthropic Cookbook](https://github.com/anthropics/anthropic-cookbook)
 
 ---
-**Last Updated**: May 25, 2026
-**Claude Code Version**: 2.1.150
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/overview
 - https://code.claude.com/docs/en/hooks
-- https://www.anthropic.com/news/claude-opus-4-7
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.144
-- https://github.com/anthropics/claude-code/releases/tag/v2.1.145
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+- https://code.claude.com/docs/en/model-config
+- https://platform.claude.com/docs/en/about-claude/models/overview
+- https://www.anthropic.com/news/claude-opus-4-8
+- https://github.com/anthropics/claude-code/releases/tag/v2.1.154
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5
diff --git a/resources.md b/resources.md
index 14d8992..a275430 100644
--- a/resources.md
+++ b/resources.md
@@ -252,12 +252,12 @@ These steps capture the core recommendations for smooth workflows with Claude Co
 | **/run, /verify, /run-skill-generator** | Bundled skills to launch your project, confirm a fix works, and generate per-project run/verify skills (v2.1.145+) | [Skills Guide](03-skills/) |
 
 ---
-**Last Updated**: May 25, 2026
-**Claude Code Version**: 2.1.150
+**Last Updated**: May 29, 2026
+**Claude Code Version**: 2.1.156
 **Sources**:
 - https://code.claude.com/docs/en/overview
 - https://code.claude.com/docs/en/changelog
 - https://code.claude.com/docs/en/agent-view
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.144
 - https://github.com/anthropics/claude-code/releases/tag/v2.1.145
-**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.7, Claude Haiku 4.5
+**Compatible Models**: Claude Sonnet 4.6, Claude Opus 4.8, Claude Haiku 4.5