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docs: update Claude Code releases to v2.1.78

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- Update latest tracked version: v2.1.77 → v2.1.78
- Add v2.1.78 highlights: StopFailure hook, ${CLAUDE_PLUGIN_DATA}
  persistent plugin state, streaming line-by-line, 3 security fixes
  (silent sandbox disable, MCP deny rules bypass, protected dirs in
  bypassPermissions mode)
- Update CHANGELOG with release tracking entry

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Florian BRUNIAUX 2026-03-18 15:08:33 +01:00
parent cf95de681e
commit eea5662a65
3 changed files with 42 additions and 4 deletions
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27
guide/core/claude-code-releases.md
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@ -10,13 +10,13 @@ tags: [reference, release]
> **Full details**: [github.com/anthropics/claude-code/CHANGELOG.md](https://github.com/anthropics/claude-code/blob/main/CHANGELOG.md)
> **Machine-readable**: [claude-code-releases.yaml](../machine-readable/claude-code-releases.yaml)
**Latest**: v2.1.77 | **Updated**: 2026-03-17
**Latest**: v2.1.78 | **Updated**: 2026-03-18
---
## Quick Jump
- [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, /context actionable suggestions, modelOverrides setting, 1M context Opus 4.6 default for Max/Team/Enterprise, MCP elicitation, PostCompact hook, /effort command, Opus 4.6 64k/128k output tokens, allowRead sandbox setting, /branch command
- [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, /context actionable suggestions, modelOverrides setting, 1M context Opus 4.6 default for Max/Team/Enterprise, MCP elicitation, PostCompact hook, /effort command, Opus 4.6 64k/128k output tokens, allowRead sandbox setting, /branch command, StopFailure hook, streaming line-by-line
- [2.0.x Series (Nov 2025 - Jan 2026)](#20x-series-november-2025---january-2026) — Opus 4.5, Claude in Chrome, Background agents
- [Breaking Changes Summary](#breaking-changes-summary)
- [Milestone Features](#milestone-features)
@ -25,6 +25,29 @@ tags: [reference, release]
## 2.1.x Series (January-March 2026)
### v2.1.78 (2026-03-18)
- **New**: `StopFailure` hook event that fires when the turn ends due to an API error (rate limit, auth failure, etc.)
- **New**: `${CLAUDE_PLUGIN_DATA}` variable for plugin persistent state that survives plugin updates; `/plugin uninstall` now prompts before deleting plugin data
- **New**: `effort`, `maxTurns`, and `disallowedTools` frontmatter support for plugin-shipped agents
- **New**: `ANTHROPIC_CUSTOM_MODEL_OPTION` env var to add a custom entry to the `/model` picker (with optional `_NAME` and `_DESCRIPTION` suffixed vars)
- **New**: Terminal notifications (iTerm2/Kitty/Ghostty popups, progress bar) now reach the outer terminal when running inside tmux with `set -g allow-passthrough on`
- **New**: Response text now streams line-by-line as it's generated
- **Fixed**: ⚠️ **Security** — Silent sandbox disable when `sandbox.enabled: true` is set but dependencies are missing — now shows a visible startup warning
- **Fixed**: ⚠️ **Security** — `deny: ["mcp__servername"]` permission rules were not removing MCP server tools before sending to the model, allowing it to see and attempt blocked tools
- **Fixed**: ⚠️ **Security** — `.git`, `.claude`, and other protected directories were writable without a prompt in `bypassPermissions` mode
- **Fixed**: Infinite loop when API errors triggered stop hooks that re-fed blocking errors to the model
- **Fixed**: `cc log` and `--resume` silently truncating conversation history on large sessions (>5 MB) that used subagents
- **Fixed**: `sandbox.filesystem.allowWrite` not working with absolute paths (previously required `//` prefix)
- **Fixed**: `--worktree` flag not loading skills and hooks from the worktree directory
- **Fixed**: `CLAUDE_CODE_DISABLE_GIT_INSTRUCTIONS` and `includeGitInstructions` setting not suppressing git status section in system prompt
- **Fixed**: Bash tool not finding Homebrew and other PATH-dependent binaries when VS Code is launched from Dock/Spotlight
- **Fixed**: Voice mode modifier-combo push-to-talk keybindings requiring a hold instead of activating immediately
- **Fixed**: Voice mode not working on WSL2 with WSLg (Windows 11)
- **Fixed**: `ANTHROPIC_BETAS` environment variable being silently ignored when using Haiku models
- **VSCode**: Fixed "API Error: Rate limit reached" when selecting Opus — model dropdown no longer offers 1M context variant to subscribers whose plan tier is unknown
- **Performance**: Improved memory usage and startup time when resuming large sessions
### v2.1.77 (2026-03-17)
- **New**: ⭐ Opus 4.6 default maximum output tokens raised to 64k; upper bound for Opus 4.6 and Sonnet 4.6 raised to 128k tokens