Claude Code Changelog @ClaudeCodeLog

Claude Code 2.1.303: additional changes Metadata: • Time since 2.1.302 release: 2d 4h 28m 16s • Bundle file size: +6.2 kB (+0.0%) • Prompt files: +3 (+18.8%) • Prompt tokens: +6,556 (+32.1%) Prompt token mix by kind: • tools: 58.9%→51.7% • system: 41.1%→48.3% Files: • metadata: github.com/marckrenn/clau… • prompt stats: github.com/marckrenn/clau… More details: github.com/marckrenn/clau…

Claude Code CLI 2.1.303 changelog: Other change: • Bug fixes and reliability improvements Source: github.com/anthropics/cla…

Claude Code 2.1.303 has been released. 1 CLI change Highlights: • CLI bug fixes reduce crashes and command failures, improving workflow reliability and predictability Complete details in thread ↓

Claude Code 2.1.303 is about to be released #cccnext

Claude Code 2.1.302 additional updates CLI surface: Added: • models: claude-code-docs, claude-lsremote-K Removed: • models: claude-lsremote- File: github.com/marckrenn/clau… Metadata: • Time since 2.1.301 release: 1d 2h 54m 21s • Bundle file size: +1,406.7 kB (+2.3%) • Prompt files: +3 (+23.1%) • Prompt tokens: +5,755 (+39.2%) Prompt token mix by kind: • tools: 71.8%→58.9% • system: 28.2%→41.1% Files: • metadata: github.com/marckrenn/clau… • prompt stats: github.com/marckrenn/clau… More details: github.com/marckrenn/clau…

Claude Code CLI 2.1.302 changelog: New features: • Added CLAUDE_CODE_AUTO_MODE_MODEL to choose the model the client-side auto mode classifier uses; it does not change the model for server-side auto mode • Added an Idle compaction row to /config for turning idle compaction off or back on; the notices shown after an idle compaction now say how to turn it off • Added a notice to /design-sync and /design-login that standalone Claude Design (claude.ai/design) closes by December 14, 2026 Fixes: • Fixed a "Prompt is too long" error when stopping a turn while the conversation was being compacted • Fixed requests failing with "diagnostics: Extra inputs are not permitted" after switching to Vertex or Bedrock mid-session • Fixed the Read tool loading an image file of any size, or a pipe or device named like an image, entirely into memory; image sources over 128 MB are now refused • Fixed /autocompact and /effort saving to the wrong model when a gateway names Opus 4 or 4.1 with a prefix, such as anthropic/claude-opus-4-1 • Fixed a prompt cache miss when a tool added mid-session was loaded again through ToolSearch or after compaction • Fixed claude plugin and other subcommands sometimes exiting before a queued settings or config write finished, which could lose the change or leave a .tmp file behind • Fixed plugin marketplaces re-cloning on every refresh, and newly installed git plugins showing version "unknown", when git defaults to the reftable ref format • Fixed the PowerShell tool not finding commands in a plugin's bin/ folder, and reporting an error when a search that finds nothing (rg, grep, findstr, git grep) is piped into Select-Object or another formatting cmdlet • Fixed Claude in the desktop app pointing you to claude.ai settings or /mcp to authorize or reconnect an MCP server where that option isn't available • Fixed artifact publishes sometimes failing when Claude sent an empty list of edits, and Claude retrying an artifact update the wrong way after a newer version of the artifact turned it away • Fixed classifier_category missing from OpenTelemetry tool_decision events for most auto mode classifier blocks, and new tool_decision attributes pushing out tool_use_id, tool_source and tool_parameters when OTEL_LOGRECORD_ATTRIBUTE_COUNT_LIMIT is low • Fixed rows in the agents view staying blank after moving down a long list or folding a section • Fixed claude remote-control --help not printing its usage and exiting when not signed in • Fixed /design consent and /design revoke suggesting /design-login when they fail in a cloud session, where it isn't available; the message now points to claude.ai/design/settings • Fixed MCP servers showing no tools, or every tool call failing, when the server negotiates protocol version 2026-07-28 but omits resultType, ttlMs or cacheScope • Fixed prompt suggestions spending usage credits on models your plan pays for only with credits: they are now skipped after a reply billed to credits • Fixed URLs written in backticks being clickable only on their first row when they wrap; the whole URL is now one link in terminals that support hyperlinks • Fixed claude plugin details @builtin suggesting claude plugin list, which never shows built-in plugins, when the plugin isn't found; it now points to /plugin • Fixed an emoji that a link starts inside wrapping one column too wide, which hid it in question previews and turned tables into lists • Fixed worktree isolation refusing to create or resume worktrees under git 2.56 or later when a stray .git file points at a directory that doesn't exist • Fixed a cloud session's cost and usage restarting from zero after the session resumed in a new process • Windows: Fixed every file write being refused or asked about for projects on exFAT or FAT32 drives, including in sessions started with --plugin-dir Improvements: • Improved startup time with many plugins enabled: plugin command and agent files now take far fewer file system calls to load, most of all on Windows • Improved auto mode with the server-side classifier: a conversation too long for the safety check is now compacted, instead of every checked tool call being denied • Improved the message when a background session reopened from another folder has no LLM gateway: it now says why, instead of "Not logged in" Security/safety changes: • Changed claude -p and Agent SDK sessions with no permission mode to start in default mode on third-party providers, with telemetry off or on a fresh install; --permission-mode auto keeps auto • [VSCode] Fixed MCP server sign-in from the panel opening a broken authorization page when the server URL contains a query string Other changes: • Self-hosted runner: Fixed git fetches failing with "bad object refs/heads" in sessions that reuse a checkout stored in git's reftable format • Changed fork subagents (subagent_type: "fork") to be on by default in claude -p, the Agent SDK, the desktop app and VS Code, as they already are in the terminal; CLAUDE_CODE_FORK_SUBAGENT=0 turns them off, and claude mcp serve never offers them • Changed the desktop app and VS Code to always run the main conversation's subagents in the background, as the terminal does, rather than let Claude choose; a subagent's own Agent calls in claude -p, the Agent SDK, the desktop app and VS Code now run in the foreground by default • Changed the ← for agents footer hint to hide 10 seconds after a session opens; the count of agents waiting on you still shows • Changed where the Claude in Chrome instructions sit in the system prompt so that new conversations can read them from the shared prompt cache • Changed prompt and agent hooks so that at most 12 of one event run at a time; the rest wait their turn • Changed the message shown when your organization's policy turns off /feedback: it now points to GitHub issues instead of an organization admin • [VSCode] Fixed text after an unclosed code block in a list showing as plain text while a reply streams, then turning into code • [VSCode] Fixed the @browser banner saying "Browser connected" when no browser with the Claude extension can be reached • [Cloud sessions] Added a banner on a routine's page that says why its last run didn't start, such as your organization reaching its limit on concurrent cloud sessions • [Cloud sessions] Fixed "Rewind to here" failing on every message except the newest in cloud sessions; self-hosted runners need Claude Code v2.1.246 or later • [Cloud sessions] Fixed the pull request status bar in cloud sessions flipping a pull request with merge conflicts back to ready while GitHub rechecked it • [Cloud sessions] Fixed routine runs showing as Completed after their cloud session stopped unexpectedly, and as Cancelled when archived before they started, instead of failed • [Cloud sessions] Fixed the diff view in cloud sessions missing changes or failing to load after the session's GitHub repository was renamed or moved • [Cloud sessions] Fixed a scheduled routine run that failed partway being run again from the start an hour or more later, which could repeat work such as posting the same report twice • [Cloud sessions] Fixed an open cloud session sometimes not showing messages sent from another device until you reloaded the page or clicked away and back • [Cloud sessions] Improved the error shown when a cloud session fails to start: it now says "Connection lost" or "Server error" instead of "Something went wrong" • [Remote Control] Fixed a subagent's pane spinning forever in a Remote Control session after your computer goes offline; it now says Remote Control is disconnected • [Claude Tag] Fixed "is thinking…" staying up under a mention in a Slack channel or DM after Claude answered it by editing one of its earlier messages • [Claude Tag] Fixed URLs in code blocks under a numbered or bulleted step of Claude's Slack replies being wrapped in angle brackets, which broke copied commands • [Claude Tag] Fixed HEIC, SVG, TIFF and BMP images attached in Slack never reaching Claude; they now arrive as files in its working files, like other file types • [Claude Tag] Fixed new channel managers losing access to Claude in Slack in organizations that restrict Claude Tag by role; the manager role now also grants Claude Tag in Slack • [Claude Tag] Fixed custom connectors whose MCP servers share one host showing as a single connector in Claude Tag admin settings; each server is now its own connector • [Claude Tag] Fixed Claude in Slack sometimes answering a direct message with "DMs are temporarily unavailable" and dropping it when a single Slack lookup stalled; it now retries first • [Claude Tag] Fixed direct messages with Claude on a Slack Enterprise Grid ignoring Slack's workspace dropdown; they now run under the connected workspace you last opened Claude in • [Claude Tag] Fixed Claude in Slack's notice for a channel's monthly spend limit saying a channel manager can raise it; it now names an organization owner and links the usage page • [Claude Tag] Fixed links in Claude's Slack replies absorbing the closing bold or italic marks, or full-width punctuation, right after them, which broke the link and the formatting • [Claude Tag] Improved repository search in Claude Tag admin settings to cover up to 100 connected GitHub accounts and find private repositories past the first 5,000 of a GitHub App install • [Claude Tag] Improved Add place in Claude Tag admin settings to list a channel you type or paste right away, instead of only after your organization's full channel list has loaded • [Claude Tag] Improved Add > Domain on a workspace's or channel's page in Claude Tag admin settings to be available once that page loads, not only after every channel has loaded • [Claude Tag] Changed Claude Tag admin settings to organize Claude's access into four tabs: Bundles, Connectors, Skills and plugins, and Channels • [Claude Tag] Changed the Roles page in organization settings to group the roles created for Claude Tag channel managers in a collapsed section below your organization's own roles • [Code Review] Fixed Code Review setup not resuming after you leave to connect GitHub; back in admin settings, it now reopens at the repository picker Source: github.com/anthropics/cla…

Claude Code 2.1.302 has been released. 63 CLI changes Highlights: • Read tool refuses image sources over 128 MB to avoid loading large files into memory and crashing • Prompt suggestions omit credit-billed models after a credit-billed reply, avoiding unexpected credit use • Added 'Idle compaction' on/off in /config; post-compaction notices now show how to disable it Complete details in thread ↓

Claude Code 2.1.302 is about to be released #cccnext

Claude Code 2.1.301 additional updates CLI surface: Added: • models: claude-checkpoint-index-H, claude-code-user File: github.com/marckrenn/clau… Metadata: • Time since 2.1.300 release: 1d 0h 3m 25s • Bundle file size: +384.3 kB (+0.6%) • Prompt files: +2 (+18.2%) • Prompt tokens: +1,177 (+8.7%) Prompt token mix by kind: • tools: 70.0%→71.8% • system: 30.0%→28.2% Files: • metadata: github.com/marckrenn/clau… • prompt stats: github.com/marckrenn/clau… More details: github.com/marckrenn/clau…

Claude Code 2.1.301 system prompt updates Notable changes: 1) Claude is now explicitly scoped to authorized security testing/defensive work/CTFs/education. It must refuse destructive techniques (incl. DoS, mass targeting, supply chain compromise, malicious detection evasion) and require clear authorization context for dual-use tooling. Links: 1) github.com/marckrenn/clau…

Claude Code 2.1.301 is now available. 51 CLI changes, 1 system prompt change Highlights: • System prompt adds security-testing scope and must refuse out-of-scope probes, blocking unauthorized testing • Unattended retry mode now aborts requests when the next usage-limit reset is far in the future Complete details in thread ↓

Claude Code 2.1.301 is about to be released #cccnext

Claude Code 2.1.300 additional updates CLI surface: Removed: • models: claude-checkpoint-index-H File: github.com/marckrenn/clau… Metadata: • Time since 2.1.299 release: 15h 17m 22s • Bundle file size: +620.9 kB (+1.0%) • Prompt files: -13 (-54.2%) • Prompt tokens: -19,045 (-58.5%) Prompt token mix by kind: • tools: 74.5%→70.0% • system: 25.5%→30.0% Files: • metadata: github.com/marckrenn/clau… • prompt stats: github.com/marckrenn/clau… More details: github.com/marckrenn/clau…

Claude Code 2.1.300 system prompt updates Notable changes: 1) Claude no longer receives the explicit "AskUserQuestion" directive. In its place, the prompt now injects a "claude-mermaid-runtime-begin" marker right before the Harness block, shifting behavior away from forced question-asking and toward a runtime-wrapped/flagged instruction section (likely tied to Mermaid handling). Links: 1) github.com/marckrenn/clau…

Claude Code 2.1.300 has been released. 88 CLI changes, 1 system prompt change Highlights: • Added virtualText: prompt-box text excluded from draft/submitted prompt, so it stays out of model input • $.ui.view({agentId}) shows agent transcript in main view; $.ui.view({}) returns to prior view for quick review • prompt.change hook fires on non-typed prompt edits (history/clear/undo/plugin fill), lets mods react Complete details in thread ↓

Claude Code 2.1.300 is about to be released #cccnext

Claude Code 2.1.299 has been released. 190 CLI changes, 1 system prompt change Highlights: • Added --disallow-tools to claude plugin eval to block specified built-in tools during runs and avoid tool bias • Model accepts security-testing/dual-use prompts and uses AskUserQuestion to clarify, so they are not refused • Idle compaction compacts chats over 200K tokens after ≈54m idle, preventing full reprocessing on resume Full details are in thread below

Claude Code 2.1.299 is about to be released #cccnext