.claude-code-version-check.json

{
  "lastCheckedVersion": "2.1.76",
  "lastCheckedDate": "2026-03-17",
  "changelogUrl": "https://raw.githubusercontent.com/anthropics/claude-code/refs/heads/main/CHANGELOG.md",
  "reviewedChanges": [
    {
      "version": "2.1.76",
      "date": "2026-03-17",
      "relevantChanges": [
        "New Elicitation hook event: intercepts MCP server input requests before showing dialog",
        "New ElicitationResult hook event: fires after user responds; can override result",
        "New PostCompact hook event: fires after compaction completes (companion to PreCompact)",
        "New -n/--name CLI flag to set session display name at startup",
        "New worktree.sparsePaths setting for sparse-checkout with --worktree",
        "New /effort slash command to set model effort level",
        "New feedbackSurveyRate enterprise setting for session quality survey sampling",
        "Fixed deferred tools (via ToolSearch) losing input schemas after compaction",
        "Fixed slash commands showing 'Unknown skill'",
        "Fixed plan mode re-asking for approval after acceptance",
        "Fixed Bash(cmd:*) permission rules not matching with quoted # arguments",
        "Fixed SessionEnd hooks still using 1.5s hard limit even when hook.timeout configured (also fixed in 2.1.74)"
      ],
      "actionsRequired": [
        "Update .claude/rules/hooks-reference.md: add Elicitation, ElicitationResult, PostCompact events with schemas",
        "Update .claude/rules/prompt-agent-hooks.md: add Elicitation/ElicitationResult to supported events table",
        "Update .claude/rules/hooks-reference.md: version header to 2.1.76+"
      ]
    },
    {
      "version": "2.1.75",
      "date": "2026-03-13",
      "relevantChanges": [
        "1M context window for Opus 4.6 by default for Max, Team, Enterprise plans",
        "New /color command for per-session prompt bar color",
        "New /rename command for session name display",
        "Last-modified timestamps added to memory files",
        "Hook source display (settings/plugin/skill) in permission prompts",
        "Async hook completion messages suppressed by default (use --verbose to see)",
        "BREAKING: Removed deprecated Windows managed settings fallback at C:\\ProgramData\\ClaudeCode\\managed-settings.json"
      ],
      "actionsRequired": [
        "Note async hook suppression behavior change in hooks-reference.md"
      ]
    },
    {
      "version": "2.1.74",
      "date": "2026-03-12",
      "relevantChanges": [
        "New autoMemoryDirectory setting to configure custom directory for auto-memory storage",
        "Actionable suggestions added to /context command",
        "Fixed managed policy 'ask' rules being bypassed by user 'allow' rules or skill allowed-tools",
        "Fixed full model IDs (e.g., claude-opus-4-5) being silently ignored in agent frontmatter model: field",
        "Fixed SessionEnd hooks being killed after 1.5s regardless of hook.timeout; now configurable via CLAUDE_CODE_SESSIONEND_HOOKS_TIMEOUT_MS",
        "Fixed MCP OAuth authentication hanging when callback port is already in use",
        "Changed --plugin-dir so local dev copies now override installed marketplace plugins with same name"
      ],
      "actionsRequired": [
        "Note full model IDs now work in agent frontmatter",
        "Note CLAUDE_CODE_SESSIONEND_HOOKS_TIMEOUT_MS env var in hooks-reference.md"
      ]
    },
    {
      "version": "2.1.73",
      "date": "2026-03-11",
      "relevantChanges": [
        "New modelOverrides setting to map model picker entries to custom provider model IDs",
        "Fixed subagents with model: opus/sonnet/haiku being silently downgraded on Bedrock/Vertex/Foundry",
        "Changed default Opus model on Bedrock/Vertex/Foundry to Opus 4.6",
        "Fixed SessionStart hooks firing twice when resuming via --resume or --continue",
        "Fixed JSON-output hooks injecting no-op system-reminder messages into model context",
        "Deprecated /output-style command — use /config instead",
        "Fixed deadlock when many skill files changed at once"
      ],
      "actionsRequired": []
    },
    {
      "version": "2.1.72",
      "date": "2026-03-10",
      "relevantChanges": [
        "Restored model parameter on Agent tool for per-invocation model overrides",
        "SECURITY FIX: PreToolUse hooks returning 'allow' were bypassing deny rules (including enterprise managed settings)",
        "Fixed permission rule matching: wildcard rules not matching heredocs/embedded newlines/no arguments",
        "Fixed sandbox permissions: certain write operations incorrectly allowed without prompting",
        "Fixed skill hooks firing twice per event when hooks-enabled skill invoked by model",
        "Fixed transcript_path pointing to wrong directory for resumed/forked sessions",
        "Fixed async hooks not receiving stdin with bash read -r",
        "Changed CLAUDE.md HTML comments to be hidden from Claude when auto-injected",
        "Added CLAUDE_CODE_DISABLE_CRON env var to stop scheduled cron jobs mid-session",
        "Added lsof, pgrep, tput, ss, fd, fdfind to bash auto-approval allowlist",
        "Fixed SDK prompt cache invalidation in query() calls, reducing input token costs up to 12x"
      ],
      "actionsRequired": [
        "Note security fix: PreToolUse 'allow' bypass of deny rules is fixed",
        "Note new CLAUDE_CODE_DISABLE_CRON env var in sandbox-guidance.md"
      ]
    },
    {
      "version": "2.1.71",
      "date": "2026-03-09",
      "relevantChanges": [
        "Task tool renamed to Agent tool in 2.1.63 (Task still works as alias)",
        "New subagent frontmatter fields: permissionMode, maxTurns, skills, memory, background, mcpServers",
        "Agent(name) syntax in tools field to restrict spawnable subagent types",
        "--agents CLI flag for session-scoped subagent definitions",
        "Subagent scope priority updated: CLI > project > user > plugin",
        "Persistent subagent memory via memory field (user/project/local scope)",
        "Preload skills into subagents via skills field",
        "New skill string substitutions: $ARGUMENTS[N], $N, ${CLAUDE_SESSION_ID}, ${CLAUDE_SKILL_DIR}",
        "New settings: CLAUDE_CODE_EFFORT_LEVEL, CLAUDE_CODE_DISABLE_ADAPTIVE_THINKING",
        "New plugin settings: strictKnownMarketplaces, hostPattern marketplace source",
        "New MCP settings: allowManagedMcpServersOnly",
        "New env vars: SLASH_COMMAND_TOOL_CHAR_BUDGET, CLAUDE_CODE_DISABLE_BACKGROUND_TASKS, CLAUDE_AUTOCOMPACT_PCT_OVERRIDE",
        "Weaker sandbox options for restricted Docker/WSL2 environments",
        "Skill context budget: 2% of context window, fallback 16,000 characters"
      ],
      "actionsRequired": [
        "Updated .claude/rules/agent-development.md: new subagent fields, Task→Agent rename, persistent memory, skills preloading, scope priority, agent spawning restrictions",
        "Updated .claude/rules/skill-development.md: new string substitution variables ($ARGUMENTS[N], $N, ${CLAUDE_SESSION_ID}, ${CLAUDE_SKILL_DIR}), name field now optional",
        "Updated .claude/rules/hooks-reference.md: version header updated to 2.1.71+"
      ]
    },
    {
      "version": "2.1.63",
      "date": "2026-03-02",
      "relevantChanges": [],
      "actionsRequired": [
        "Review pending - see GitHub issue"
      ]
    },
    {
      "version": "2.1.50",
      "date": "2026-02-25",
      "relevantChanges": [
        "New hook events: WorktreeCreate, WorktreeRemove, TeammateIdle, TaskCompleted, ConfigChange",
        "Hook default timeout increased from 60 seconds to 10 minutes",
        "PermissionRequest hook for auto approve/deny of permission requests",
        "Stop and SubagentStop clarified as distinct events (main agent vs subagent)",
        "Agent teams: TeamCreate, SendMessage, TaskOutput, TaskStop native tools",
        "Task tool isolation: 'worktree' parameter for isolated git worktree execution",
        "Task tool run_in_background: true parameter for background agent execution",
        "Agent memory hierarchy: user/project/local/auto scopes",
        "Multi-agent collaboration via lead+teammates architecture"
      ],
      "actionsRequired": [
        "Created .claude/rules/hooks-reference.md to document hook system enhancements",
        "Created .claude/rules/agent-development.md to document agent system enhancements"
      ],
      "mcpVerification": {
        "verifiedDate": "2026-02-26",
        "verifiedIn": "issue-799",
        "findings": [
          "OAuth improvements (step-up auth, discovery caching): Remote MCP servers using HTTP+SSE support OAuth 2.1; discovery metadata cached per server URL; step-up auth triggers re-authorization mid-session when additional scopes needed",
          "Dynamic MCP updates (list_changed): Servers declaring listChanged capability send notifications/tools/list_changed; Claude Code refreshes tool list without session restart",
          "/mcp enable/disable commands: Session-scoped server toggling; does not modify .mcp.json; use for runtime management",
          "Plugin.json schema: No new fields required; mcpServers field supports both inline and external file; url+headers fields for remote OAuth servers"
        ],
        "actionsRequired": [
          "Updated agent-patterns-plugin/skills/mcp-management/SKILL.md: was stub (19 lines), now full skill with OAuth, enable/disable, list_changed documentation",
          "Updated configure-plugin/skills/configure-mcp/SKILL.md: added Runtime Server Management section with /mcp enable/disable command reference",
          "Updated configure-plugin/skills/configure-mcp/REFERENCE.md: added Remote MCP Servers section with HTTP+SSE OAuth configuration patterns"
        ]
      }
    },
    {
      "version": "2.1.7",
      "date": "2026-01-20",
      "relevantChanges": [
        "SubagentStart hook event with input modification",
        "Hooks in skill/command frontmatter",
        "context:fork for agent isolation",
        "disallowedTools for agent restrictions",
        "Skills and slash commands merged",
        "Hot-reload for skills/commands",
        "SlashCommand tool invocation",
        "Wildcard permission patterns",
        "Shell operator protections",
        "SDK migration to @anthropic-ai/claude-agent-sdk"
      ],
      "actionsRequired": []
    },
    {
      "version": "2.1.7",
      "date": "2026-01-14",
      "relevantChanges": [],
      "actionsRequired": []
    }
  ]
}