docs: update Claude Code releases to v2.1.72
- Update latest tracked version: 2.1.71 → 2.1.72 (2026-03-09) - Agent model parameter restored on Agent tool for per-invocation overrides - SDK query() prompt cache fix — up to 12x input token cost reduction - CLAUDE.md HTML comments now hidden from Claude when auto-injected - Simplified effort levels: low/medium/high, new symbols ○ ◐ ● - ExitWorktree tool + CLAUDE_CODE_DISABLE_CRON env var + /plan optional desc - Bump guide version: 3.34.1 → 3.34.2 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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CHANGELOG.md
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CHANGELOG.md
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@ -6,6 +6,17 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
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## [Unreleased]
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## [3.34.2] - 2026-03-11
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### Documentation
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- **Claude Code Releases**: Updated tracking to v2.1.72 (2026-03-09)
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- Restored `model` parameter on Agent tool for per-invocation model overrides
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- Fixed SDK `query()` prompt cache invalidation — up to 12x input token cost reduction
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- CLAUDE.md HTML comments now hidden from Claude when auto-injected
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- Simplified effort levels: low/medium/high (removed max), new symbols ○ ◐ ●
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- `ExitWorktree` tool added; `CLAUDE_CODE_DISABLE_CRON` env var; `/plan` optional description
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## [3.34.1] - 2026-03-11
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### Added
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@ -6,7 +6,7 @@
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<p align="center">
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<a href="https://github.com/FlorianBruniaux/claude-code-ultimate-guide/stargazers"><img src="https://img.shields.io/github/stars/FlorianBruniaux/claude-code-ultimate-guide?style=for-the-badge" alt="Stars"/></a>
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<a href="./CHANGELOG.md"><img src="https://img.shields.io/badge/Updated-Mar_11,_2026_·_v3.34.1-brightgreen?style=for-the-badge" alt="Last Update"/></a>
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<a href="./CHANGELOG.md"><img src="https://img.shields.io/badge/Updated-Mar_11,_2026_·_v3.34.2-brightgreen?style=for-the-badge" alt="Last Update"/></a>
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<a href="./quiz/"><img src="https://img.shields.io/badge/Quiz-271_questions-orange?style=for-the-badge" alt="Quiz"/></a>
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<a href="./examples/"><img src="https://img.shields.io/badge/Templates-204-green?style=for-the-badge" alt="Templates"/></a>
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<a href="./guide/security/security-hardening.md"><img src="https://img.shields.io/badge/🛡️_Threat_DB-15_vulnerabilities_·_655_malicious_skills-red?style=for-the-badge" alt="Threat Database"/></a>
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@ -872,7 +872,7 @@ See [CONTRIBUTING.md](./CONTRIBUTING.md) for guidelines.
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---
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*Version 3.34.1 | Updated daily · Mar 11, 2026 | Crafted with Claude*
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*Version 3.34.2 | Updated daily · Mar 11, 2026 | Crafted with Claude*
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<!-- SEO Keywords -->
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<!-- claude code, claude code tutorial, anthropic cli, ai coding assistant, claude code mcp,
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2
VERSION
2
VERSION
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@ -1 +1 @@
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3.34.1
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3.34.2
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@ -12,7 +12,7 @@ tags: [cheatsheet, reference]
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**Written with**: Claude (Anthropic)
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**Version**: 3.34.1 | **Last Updated**: February 2026
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**Version**: 3.34.2 | **Last Updated**: February 2026
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---
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@ -639,4 +639,4 @@ Speed: `rg` (~20ms) → Serena (~100ms) → ast-grep (~200ms) → grepai (~500ms
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**Author**: Florian BRUNIAUX | [@Méthode Aristote](https://methode-aristote.fr) | Written with Claude
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*Last updated: February 2026 | Version 3.34.1*
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*Last updated: February 2026 | Version 3.34.2*
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@ -10,13 +10,13 @@ tags: [reference, release]
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> **Full details**: [github.com/anthropics/claude-code/CHANGELOG.md](https://github.com/anthropics/claude-code/blob/main/CHANGELOG.md)
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> **Machine-readable**: [claude-code-releases.yaml](../machine-readable/claude-code-releases.yaml)
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**Latest**: v2.1.69 | **Updated**: 2026-03-05
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**Latest**: v2.1.72 | **Updated**: 2026-03-11
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---
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## Quick Jump
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- [2.1.x Series (January-March 2026)](#21x-series-january-march-2026) — Worktree isolation, background agents, ConfigChange hook, Fast mode Opus 4.6, 1M context, claude.ai MCP connectors, remote-control, auto-memory, /copy command, HTTP hooks, worktree config sharing, ultrathink re-introduced, InstructionsLoaded hook, 4 security fixes
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- [2.1.x Series (January-March 2026)](#21x-series-january-march-2026) — Worktree isolation, background agents, ConfigChange hook, Fast mode Opus 4.6, 1M context, claude.ai MCP connectors, remote-control, auto-memory, /copy command, HTTP hooks, worktree config sharing, ultrathink re-introduced, InstructionsLoaded hook, 4 security fixes, Agent model override restored, 12x SDK token cost reduction
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- [2.0.x Series (Nov 2025 - Jan 2026)](#20x-series-november-2025---january-2026) — Opus 4.5, Claude in Chrome, Background agents
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- [Breaking Changes Summary](#breaking-changes-summary)
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- [Milestone Features](#milestone-features)
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@ -25,6 +25,29 @@ tags: [reference, release]
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## 2.1.x Series (January-March 2026)
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### v2.1.72 (2026-03-09)
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- **New**: Restored `model` parameter on Agent tool — per-invocation model overrides are back
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- **New**: `/plan` accepts optional description (e.g., `/plan fix the auth bug`) to enter plan mode and start immediately
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- **New**: `ExitWorktree` tool to leave an `EnterWorktree` session
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- **New**: `CLAUDE_CODE_DISABLE_CRON` env var to stop scheduled cron jobs mid-session
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- **New**: `lsof`, `pgrep`, `tput`, `ss`, `fd`, `fdfind` added to bash auto-approval allowlist
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- **New**: `/copy` `w` key writes selection directly to file, bypassing clipboard (useful over SSH)
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- **Changed**: Simplified effort levels to low/medium/high (removed max), new symbols ○ ◐ ●; use `/effort auto` to reset
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- **Changed**: CLAUDE.md HTML comments (`<!-- ... -->`) now hidden from Claude when auto-injected (visible via Read tool)
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- **Changed**: `/config` — Escape cancels changes, Enter saves and closes, Space toggles settings
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- **Fixed**: SDK `query()` prompt cache invalidation — up to 12x input token cost reduction
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- **Fixed**: Tool search now activates with `ANTHROPIC_BASE_URL` when `ENABLE_TOOL_SEARCH` is set
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- **Fixed**: Skill hooks firing twice per event when a hooks-enabled skill is invoked by the model
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- **Fixed**: `/clear` killing background agent/bash tasks — only foreground tasks now cleared
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- **Fixed**: Worktree isolation: Task tool resume not restoring cwd, background task notifications missing `worktreePath`/`worktreeBranch`
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- **Fixed**: `--continue` not resuming from most recent point after `--compact`
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- **Fixed**: Team agents now inherit the leader's model
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- **Fixed**: Parallel tool calls — only Bash errors cascade to siblings (Read/WebFetch/Glob failures no longer cancel siblings)
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- **Fixed**: Multiple hooks issues: `transcript_path` wrong for resumed/forked sessions, async hooks not receiving stdin, PostToolUse block reason displaying twice
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- **Fixed**: Several sandbox permission, plugin installation (Windows/OneDrive), and voice mode issues
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- **Perf**: Reduced bundle size by ~510 KB; improved CPU utilization in long sessions; faster bash init via native module
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### v2.1.69 (2026-03-04)
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- **Security**: Fixed nested skill discovery loading skills from gitignored directories like `node_modules` — critical security fix
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@ -16,7 +16,7 @@ tags: [guide, reference, workflows, agents, hooks, mcp, security]
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**Last updated**: January 2026
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**Version**: 3.34.1
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**Version**: 3.34.2
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---
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@ -5034,7 +5034,7 @@ The `.claude/` folder is your project's Claude Code directory for memory, settin
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| Personal preferences | `CLAUDE.md` | ❌ Gitignore |
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| Personal permissions | `settings.local.json` | ❌ Gitignore |
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### 3.34.1 Version Control & Backup
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### 3.34.2 Version Control & Backup
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**Problem**: Without version control, losing your Claude Code configuration means hours of manual reconfiguration across agents, skills, hooks, and MCP servers.
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@ -22888,4 +22888,4 @@ We'll evaluate and add it to this section if it meets quality criteria.
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**Contributions**: Issues and PRs welcome.
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**Last updated**: January 2026 | **Version**: 3.34.1
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**Last updated**: January 2026 | **Version**: 3.34.2
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# Purpose: Track Claude Code product releases for documentation sync
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# Maintained: Manual updates when new releases are announced
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latest: "2.1.71"
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updated: "2026-03-08"
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latest: "2.1.72"
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updated: "2026-03-11"
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# ════════════════════════════════════════════════════════════════
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# RELEASES (newest first, condensed highlights only)
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# 2.1.x Series (January-March 2026)
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# ─────────────────────────────────────────────────────────────
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- version: "2.1.72"
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date: "2026-03-09"
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highlights:
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- "⭐ Restored `model` parameter on Agent tool for per-invocation model overrides"
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- "⭐ Fixed SDK `query()` prompt cache invalidation — up to 12x input token cost reduction"
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- "CLAUDE.md HTML comments now hidden from Claude when auto-injected; `/plan` accepts optional description"
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- "Simplified effort levels: low/medium/high (removed max), symbols ○ ◐ ●; `ExitWorktree` tool added"
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- "Added `CLAUDE_CODE_DISABLE_CRON` env var; `lsof`, `pgrep`, `fd` added to bash auto-approval allowlist"
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breaking: []
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- version: "2.1.71"
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date: "2026-03-06"
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highlights:
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# Source: guide/ultimate-guide.md
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# Purpose: Condensed index for LLMs to quickly answer user questions about Claude Code
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version: "3.34.1"
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version: "3.34.2"
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updated: "2026-03-03"
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# ════════════════════════════════════════════════════════════════
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@ -1534,7 +1534,7 @@ ecosystem:
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- "Cross-links modified → Update all 4 repos"
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history:
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- date: "2026-01-20"
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event: "Code Landing sync v3.34.1, 66 templates, cross-links"
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event: "Code Landing sync v3.34.2, 66 templates, cross-links"
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commit: "5b5ce62"
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- date: "2026-01-20"
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event: "Cowork Landing fix (paths, README, UI badges)"
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@ -1546,7 +1546,7 @@ ecosystem:
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onboarding_matrix_meta:
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version: "2.1.0"
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last_updated: "2026-03-09"
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aligned_with_guide: "3.34.1"
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aligned_with_guide: "3.34.2"
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changelog:
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- version: "2.1.0"
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date: "2026-03-09"
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core: [rules, sandbox_native_guide, commands]
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time_budget: "5 min"
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topics_max: 3
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note: "SECURITY FIRST - sandbox before commands (v3.34.1 critical fix)"
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note: "SECURITY FIRST - sandbox before commands (v3.34.2 critical fix)"
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beginner_15min:
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core: [rules, sandbox_native_guide, workflow, essential_commands]
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- default: agent_validation_checklist
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time_budget: "60 min"
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topics_max: 6
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note: "Dual-instance pattern for quality workflows (v3.34.1)"
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note: "Dual-instance pattern for quality workflows (v3.34.2)"
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learn_security:
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intermediate_30min:
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- default: permission_modes
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time_budget: "30 min"
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topics_max: 4
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note: "NEW goal (v3.34.1) - Security-focused learning path"
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note: "NEW goal (v3.34.2) - Security-focused learning path"
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power_60min:
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core: [sandbox_native_guide, mcp_secrets_management, security_hardening]
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core: [rules, sandbox_native_guide, workflow, essential_commands, context_management, plan_mode]
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time_budget: "60 min"
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topics_max: 6
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note: "Security foundation + core workflow (v3.34.1 sandbox added)"
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note: "Security foundation + core workflow (v3.34.2 sandbox added)"
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intermediate_120min:
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core: [plan_mode, agents, skills, config_hierarchy, git_mcp_guide, hooks, mcp_servers]
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