Claude Code Changelog
@ClaudeCodeLog

UNOFFICIAL – but tolerated – bot posting Claude Code CLI, feature flag & prompt changes. Full CC history in github repo.

github.com/marckrenn/claude-…
Joined August 2025
Claude Code 2.1.285 is now available. 136 CLI changes Highlights: • claude --desktop opens desktop app in the current directory or resumes a session for quick CLI→desktop flow • Added allowedProviders setting to restrict which API providers a machine may use, reducing external calls • Added CLAUDE_CODE_DISABLE_WEB_FETCH to disable WebFetch and stop automatic web fetches during tool runs Complete details in thread ↓
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8,689
Claude Code 2.1.284 has been released. 100 CLI changes Highlights: • Default Sonnet model switched to Claude Sonnet 5.5 with 1M context window and updated pricing • Auto mode shows 'Yes, but ask again next time' for outside-working-dir reads; grants one-time OK and reprompts • Damaged streams no longer show 'undefined' or raw JSON parse errors; responses are retried for reliability Full details in thread below
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47,539
Claude Code 2.1.283 has been released. 94 CLI changes Highlights: • availableModelsMatch='exact' locks an availableModels entry to the named model version, blocking new releases • Opt-in x-claude-code-prompt-id header lets LLM gateways group and correlate requests for one user prompt • Opt-in load_test_mode builds/signs requests, blocks upstream and serves canned replies for safe load testing Full details are in thread ↓
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Claude Code 2.1.282 has been released. 86 CLI changes Highlights: • maxProseWidth caps prose in wide terminals for better readability while tables and code keep full width • Startup notice and /status+claude doctor list ignored/telemetry-off vars explaining why telemetry disabled • Fixed 400 errors from undecryptable web-search entries in conversation history, restoring failed requests Full details are in thread ↓
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Claude Code 2.1.281 has been released. 176 CLI changes, 1 system prompt change Highlights: • Stray 'Response' token removed from hooks guidance Complete details in thread ↓
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Claude Code 2.1.280 has been released. 114 CLI changes Highlights: • Default Opus model set to Claude Opus 5.5 (1M context); pricing $4/$20 per Mtok and $0.20/Mtok cache reads • Auto mode denies once on declined safety reviews and backs off on silent checks to avoid retry loops Full details are in thread ↓
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Claude Code 2.1.278 has been released. 2 CLI changes Highlights: • Auto mode defaulted to the server-side classifier to avoid classifier overhead charges • Added 'Auto mode server' to /status showing if classifier runs server-side so overhead isn't charged Full details are in thread ↓
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35,774
Claude Code 2.1.277 is available. 87 CLI changes Highlights: • Projects lacking CLAUDE.md now read AGENTS.md for project instructions, enabling agent configs in /config • claude -p and Agent SDK sessions that hung now report errors and exit 1, avoiding silent stalls • Fixed 'text content blocks must be non-empty' errors from prior empty assistant turns so requests proceed Full details are in thread ↓
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524
51,992
Claude Code 2.1.276 has been released. 1 CLI change Highlights: • Fixed 400 'Input tag "advisor_20260301"' errors when ANTHROPIC_BASE_URL used with a proxy, restoring requests Full details are in thread ↓
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177
20,584
Claude Code 2.1.275 is now available. 96 CLI changes Highlights: • Added send-now (Ctrl+Enter or Ctrl+X Ctrl+S) to interrupt a turn and immediately send all queued messages • Signed shells sync Claude skills and plugins, showing account tools; opt out: syncClaudeAiSkills/Plugins:false • Plugin and marketplace outputs strip secrets from git/ssh/marketplace URLs to prevent credential leaks Full details in thread below
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326
52,981
Claude Code 2.1.274 is now available. 108 CLI changes Highlights: • Shows critical-memory warning with steps to free memory or restart safely, reducing crash risk • Sessions stop looping on 'unexpected tool_use_id' 400s; transcripts self-heal or show a clear /rewind error • 403 insufficient_scope errors now show missing permissions and link to /mcp for re-auth to speed fixes Full details are in thread ↓
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342
37,575
Claude Code 2.1.273 has been released. 64 CLI changes Highlights: • Remote-control sessions can be forked into background local sessions, preserving state and freeing the UI • Notifies when an MCP server disconnects mid-session and reconnection fails, with /mcp diagnostics to diagnose • Auto mode no longer pauses when Artifact uploads files in cloud/Remote-Control sessions, automation continues Complete details in thread ↓
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39,180
Claude Code 2.1.272 has been released. 1 CLI change Highlights: • CLI bug fixes and reliability improvements reduced crashes and improved stability for common workflows Full details available in thread ↓
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19,783
Claude Code 2.1.271 has been released. 96 CLI changes Highlights: • Claude Code Remote now honors host fast-mode or /fast reducing response latency where organization allows • Per-command allowed_domains limits network in Bash/PowerShell/Monitor auto-sandboxing to only required hosts • Org-policy cache is cleared after account/API-key switch; policies refresh immediately to prevent stale rules Complete details in thread ↓
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41,794
Claude Code 2.1.270 has been released. 1 CLI change Highlights: • Read-only Git commands in Bash no longer prompt unexpectedly after long sessions, preventing workflow breaks • System runs a supplied Bash command and returns its output inline, enabling immediate shell-output retrieval • Adds tool to launch agents to run delegated multi-step workflows, automating complex task orchestration Full details are in thread ↓
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282
40,604
Claude Code 2.1.269 has been released. 98 CLI changes Highlights: • Added 'claude plugin eval' to run plugin evals and emit scored JSON+HTML outputs for reproducible scoring • Bash tool now includes a diff of files changed by a command so edits are visible alongside the command output Complete details in thread ↓
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29,435
Claude Code 2.1.268 has been released. 96 CLI changes Highlights: • Startup warns if access_control.allow_cidrs empty; first public request triggers one alert flagging exposure • Fixed Artifact regex causing HTTP 400 on third-party Anthropic-compatible endpoints, restoring integrations • Respawned teammates stop inheriting tools/prompts from untrusted same-name files, blocking unexpected tools Full details are in thread ↓
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18,633
Claude Code 2.1.267 is now available. 53 CLI changes Highlights: • Added maxEffortLevel setting to cap effort on all providers (Bedrock, Vertex, Foundry), enforcing admin limits • Adds --system-prompt-snapshot off to re-render system prompt each request, enabling faster prompt iteration • Workflow agent() large-output calls now run safety checks in auto mode, not rejected Complete details in thread ↓
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29,304
Claude Code 2.1.266 is now available. 1 CLI change Highlights: • Fixed regression that ignored CLAUDE_CODE_USE_GATEWAY env var, restoring LLM-gateway and proxy behavior Full details are in thread ↓
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169
21,951
Claude Code 2.1.265 has been released. 50 CLI changes Highlights: • Telemetry now sends user.email/user.groups from Desktop/Cowork via apps gateway, matching terminal sessions • CLI: --plugin-dir can point to a plugins folder; child manifests auto-load and changes apply live • Tool results saved to disk capped at 1 GB; conversation preview shows when a saved file was truncated Full details are in thread ↓
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282
29,898
Claude Code 2.1.263 has been released. 1 CLI change Highlights: • CLI bug fixes and reliability improvements to reduce crashes and improve command stability Full details are in thread ↓
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309
42,993
Claude Code 2.1.261 has been released. 67 CLI changes Highlights: • Inline command and background output limit raised to 128K so large outputs remain inline and keep full context • Added /skill-doctor to list unused loaded skills and their contextual cost, enabling pruning • SDK and cloud sessions now honor Stop/interrupts sent right after the first prompt, so responses stop early Complete details in thread ↓
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43,119
Claude Code 2.1.260 has been released. 66 CLI changes Highlights: • Fullscreen diff panel shows uncommitted Claude edits beside the conversation, simplifying review before commit • Fixed permission rules dropping parentheses, restoring read-only sandboxing to block accidental writes • Status line and /cost show likely causes for prompt-cache misses, making cache issue diagnosis easier Full details are in thread ↓
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42,353
Claude Code 2.1.259 has been released. 37 CLI changes Highlights: • managedMcpServers lets orgs provision HTTP/SSE MCP servers org-wide for central tool distribution • Added --permission-prompts none: unattended/headless hosts auto-deny permission prompts to avoid hung sessions • Concurrent sessions stop overwriting ~/.claude.json, so workspace trust and MCP/project state persist Full details are in thread ↓
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35,137
Claude Code 2.1.258 has been released. 2 CLI changes Highlights: • Fixed Claude Code failing to launch on macOS 12 (Monterey), restoring functionality lost in 2.1.255 • Resent approvals stop 'user messages must have non-empty content' errors in remote/scheduled, fixing failures Complete details in thread ↓
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187
20,892
Claude Code 2.1.257 has been released. 104 CLI changes Highlights: • Default Fable model set to Claude Fable 5.1 (1M context); billing now $10/$50 per Mtok, $0.25/Mtok cache reads • Auto mode prompts once before the first file read outside working directories, with an option to block reads • Auto mode blocks auto-approval of cloud metadata, egress evasion and cross-tenant reach—reducing exposure Full details are in thread ↓
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74,761
Claude Code 2.1.252 has been released. 4 CLI changes Highlights: • Fixed Remote Control sessions in Desktop/VS Code stalling when claude.ai degrades, keeping editors responsive • Background task failure output no longer exceeds API conversation size limits, preventing dropped requests • Project 'always allow' choices persist even without .claude/settings.local.json, avoiding lost prefs Complete details in thread ↓
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73,616
Claude Code 2.1.251 has been released. 71 CLI changes Highlights: • Added PreModelSwitch/PostModelSwitch hooks to block/confirm/annotate model switches for controlled rollouts • File Read/Write/Edit now block swapped symlinks that escape the working directory, preventing outside access Full details in thread below
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36,203
Claude Code 2.1.250 has been released. 1 CLI change Highlights: • CLI bug fixes and reliability improvements reduce unexpected failures and improve command stability Complete details in thread ↓
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24,131
Claude Code 2.1.248 has been released. 49 CLI changes Highlights: • Adds --restricted: removes code/command tools and WebFetch (unless in --tools), limiting external exec/web • SendMessage/ListAgents works on Bedrock/Vertex/Foundry with telemetry off, enables same-machine messaging • Fixed prompt-cache bug that dropped extended-thinking context hourly, preserving continuity in long sessions Full details are in thread ↓
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42,587
Claude Code 2.1.247 has been released. 33 CLI changes Highlights: • Added SendFeedback tool to draft session feedback in /feedback for review/send; disable via feedbackDrafts • /claude-api cost-optimize: profiles spend, suggests caching,batching,token-hygiene,model-choice to cut spend • Sub-agents use session fallback on initial 404; parent gets (type,status,reqID,model) to avoid crashes & debug Full details are in thread ↓
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33,866
Claude Code 2.1.246 has been released. 61 CLI changes Highlights: • Added a tool to launch dedicated agents for complex multi-step tasks, enabling isolated subagent workflows • Auto mode tab added to /permissions to view and edit auto-mode classifier rules, enabling finer control • Increased safety-check timeout for auto-mode tool calls to prevent temporary denials for large sessions Complete details in thread ↓
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56,423
Claude Code 2.1.245 has been released. 1 CLI change Highlights: • Fixed startup crash on Linux distributions with glibc 2.44, restoring successful launches on affected systems • CLI commands and workflows changed: 26 added, 19 removed, altering available actions and scripts Complete details in thread ↓
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25,621
Claude Code 2.1.243 has been released. 60 CLI changes Highlights: • Loops breakdown in /usage: per-loop runs, total tokens, tokens/run, last run — reveals chatty or runaway loops • modelPicker curates /model into an ordered, labeled org-approved list, making approved models easiest to pick • Added modelPricing setting so /cost, status, and telemetry use org contracted per-model rates and discounts Full details are in thread ↓
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51,235
Claude Code 2.1.241 is now available. 1 CLI change Highlights: • CLI bug fixes and reliability improvements reduce crashes and make commands more stable Full details are in thread ↓
9
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305
33,907
Claude Code 2.1.240 has been released. 1 CLI change Highlights: • Bug fixes and reliability improvements to the CLI to reduce crashes and improve error messages • CLI fixes reduce crashes and improve command consistency, leading to fewer interruptions and steadier results All details in thread ↓
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34,323
Claude Code 2.1.239 is now available. 59 CLI changes Highlights: • Cost estimates (/cost, status, --max-budget-usd) add 1.1× US-only premium so budgets reflect residency costs • Fixed Bedrock streaming behind proxies that stripped Content-Type, preventing replays that doubled API charges • Synced plugins from claude.ai appear as name@synced, can be enabled/disabled, and won't override local plugins More details in thread ↓
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48,187
Claude Code 2.1.238 is now available. 39 CLI changes Highlights: • Plugin headersHelper now runs only at install/update and prompts [y/N], stopping silent header minting • Subagent tool results released once out of view to stop unbounded memory growth in long sessions • Self-hosted runner defers SIGTERM for a set interval, keeping attached sessions alive to avoid abrupt loss Full details are in thread ↓
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29,792
Claude Code 2.1.237 has been released. 2 CLI changes Highlights: • Fixed prompt caching for sessions using LLM gateways or custom base URLs to prevent stale prompts • Added a built-in 'Concise' output style that leads with results and skips preamble for short focused replies Full details are in thread ↓
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26,714
Claude Code 2.1.236 has been released. 33 CLI changes Highlights: • ANTHROPIC_DEFAULT_MODEL sets the model new sessions start on, while /model still overrides and persists • macOS sandbox: wildcard read-deny now override allowed regions and prevent renames bypassing matched paths • SendMessage adds notify_when_idle to request one-off opt-in idle notice from another session, no polling Full details are in thread ↓
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62,678
Claude Code 2.1.235 has been released. 19 CLI changes Highlights: • Optional spellcheck underlines typos in prompts via local aspell/hunspell/ispell, improving prompt accuracy • SendMessage now rejects messages too large for cross-session delivery up front, preventing lost output • Dialogs show exact grant text and add 'withhold - don't ask again' when hidden, preventing accidental grants Full details are in thread ↓
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Claude Code 2.1.234 is now available. 51 CLI changes Highlights: • Claude Code automatically resumes sessions when a claude.ai usage limit resets, avoiding session interruptions • Account email used only for ID and not sent to unrelated services unless requested, preventing sharing • Remote reads, session restore and uploads now reject NT-namespace (\??\) paths, blocking NT-path access Full details are in thread ↓
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134,115
Claude Code 2.1.233 has been released. 20 CLI changes Highlights: • Added opt-in memory cgroup via CLAUDE_CODE_TOOL_MEMORY_LIMIT to keep Bash tool runs from stalling sessions • GitLab MR URLs accepted by --worktree and shown as !N in claude agents, enabling MR linking/navigation • Windows path handling blocks \??\ NT path bypass and revalidates UNC paths to prevent NTLM credential leaks Full details are in thread ↓
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47,665
Claude Code 2.1.232 has been released. 49 CLI changes Highlights: • Subagent forking now default; forked subagents inherit convo+prompt cache so spawned agents retain context • GitLab token prefixes (glrt, gloas, glptt, glagent, etc.) redacted; routable glpat/gldt removed to avoid leaks • Prompt @name mentions send SendMessage directly to the named Claude session, enabling cross-session messaging Complete details in thread ↓
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Claude Code 2.1.231 has been released. 1 CLI change Highlights: • MCP OAuth sign-in restored for pre-registered clients (e.g., Slack) by fixing a redirect URI mismatch Full details are in thread ↓
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35,843
Claude Code 2.1.229 has been released. 32 CLI changes Highlights: • Tool runs supplied bash commands and returns output, enabling shell diagnostics and automation • Tool description lets the assistant write files to the local filesystem so generated content can be saved • Added SSE keepalive pings to gateway streaming to prevent idle-timeout disconnects during long thinking pauses Full details available in thread ↓
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45,670
Claude Code 2.1.228 has been released. 18 CLI changes Highlights: • Hardened claude.ai-synced skills: stop shadowing local commands, block shell execution, sanitize metadata • Synced skills no longer shadow local commands; locals take precedence, preventing unintended overrides • Grep now uses ripgrep and is dedicated to search tasks, enabling faster, consistent project-wide searches Full details available in thread ↓
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73,421
Claude Code 2.1.227 is now available. 5 CLI changes Highlights: • Feature flags use subscription tier for expired-login sessions, avoiding incorrect Max usage-credit prompts • Fixed Bash failures in claude-code-action on GitHub-hosted runners for non-write users, restoring CI jobs • Fixed /tui restoring conversations rewound before their first message, keeping the rewind position Complete details in thread ↓
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70,947
Claude Code 2.1.226 has been released. 1 CLI change Highlights: • CLI bug fixes and reliability improvements reduce crashes and improve stability in common workflows Complete details in thread ↓
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49,272
Claude Code 2.1.225 has been released. 14 CLI changes Highlights: • Edit tool does exact string replacements in files, preventing unintended partial edits that altered substrings • Claude Code usage warning shows gateway spend cap, reset time and operator message so limits are clear • Auto mode ignores safety-filter refusals for consecutive-block counts, letting denied actions be skipped Complete details in thread ↓
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Claude Code 2.1.224 has been released. 31 CLI changes Highlights: • Self-hosted runner runs Claude Code sessions on local machines/containers for private, controlled execution • Edit tool does exact-string replacements; edits apply only if file text matches exactly, otherwise no change Full details available in thread ↓
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