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docs: update Claude Code releases to v2.1.75

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- Update latest tracked version: 2.1.74 → 2.1.75
- Highlights: 1M context Opus 4.6 default for Max/Team/Enterprise, session name on prompt bar, hook source in permission prompts, token estimation over-counting fix, Bash ! mangling fix
- Updated: 2026-03-13

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Florian BRUNIAUX 2026-03-13 19:32:04 +01:00
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8
CHANGELOG.md
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@ -6,6 +6,14 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
## [Unreleased]
### Documentation
- **Claude Code Releases**: Updated tracking to v2.1.75
- 1M context window for Opus 4.6 now default for Max, Team, Enterprise (no extra usage required)
- Session name display on prompt bar with `/rename`; hook source in permission prompts
- Fixed token estimation over-counting for thinking/tool_use blocks (premature compaction fix)
- Fixed Bash tool mangling `!` in piped commands
## [3.35.0] - 2026-03-13
### Added

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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**: v2.1.74 | **Updated**: 2026-03-12
**Latest**: v2.1.75 | **Updated**: 2026-03-13
---
## 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
- [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
- [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 +25,24 @@ tags: [reference, release]
## 2.1.x Series (January-March 2026)
### v2.1.75 (2026-03-13)
- **New**: ⭐ 1M context window for Opus 4.6 now enabled by default for Max, Team, and Enterprise plans (previously required extra usage)
- **New**: Session name display on the prompt bar when using `/rename`
- **New**: Last-modified timestamps on memory files — helps Claude reason about freshness of memories
- **New**: Hook source display (settings/plugin/skill) in permission prompts when a hook requires confirmation
- **New**: `/color` command available for all users to set a prompt-bar color
- **Fixed**: Token estimation over-counting for thinking and `tool_use` blocks (was causing premature context compaction)
- **Fixed**: Bash tool mangling `!` in piped commands (e.g. `jq 'select(.x != .y)'` now works correctly)
- **Fixed**: Voice mode not activating correctly on fresh installs without toggling `/voice` twice
- **Fixed**: Claude Code header not updating model name after switching with `/model` or Option+P
- **Fixed**: Session crash when attachment message computation returns undefined values
- **Fixed**: Managed-disabled plugins showing up in `/plugin` Installed tab
- **Fixed**: Corrupted marketplace config path handling
- **Fixed**: `/resume` losing session names after resuming a forked or continued session
- **Improved**: Startup performance on macOS non-MDM machines (skips unnecessary subprocess spawns)
- **Improved**: Async hook completion messages suppressed by default (visible with `--verbose` or transcript mode)
### v2.1.74 (2026-03-12)
- **New**: `/context` command shows actionable suggestions — identifies context-heavy tools, memory bloat, capacity warnings with optimization tips

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machine-readable/claude-code-releases.yaml
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@ -3,8 +3,8 @@
# Purpose: Track Claude Code product releases for documentation sync
# Maintained: Manual updates when new releases are announced
latest: "2.1.74"
updated: "2026-03-12"
latest: "2.1.75"
updated: "2026-03-13"
# ════════════════════════════════════════════════════════════════
# RELEASES (newest first, condensed highlights only)
@ -15,6 +15,17 @@ releases:
# 2.1.x Series (January-March 2026)
# ─────────────────────────────────────────────────────────────
- version: "2.1.75"
date: "2026-03-13"
highlights:
- "⭐ 1M context window for Opus 4.6 now default for Max, Team, and Enterprise (no extra usage required)"
- "Session name display on prompt bar when using /rename"
- "Last-modified timestamps on memory files; hook source displayed in permission prompts"
- "Fixed token estimation over-counting for thinking/tool_use blocks (prevented premature compaction)"
- "Fixed Bash tool mangling ! in piped commands (e.g. jq 'select(.x != .y)')"
- "Improved startup performance on macOS non-MDM machines"
breaking: []
- version: "2.1.74"
date: "2026-03-12"
highlights: