Claude Code Placemat — changes

CC v2.1.278 — 2 placemat changes

2026-09-19T09:00:00Z

CHG CLAUDE_CODE_AUTO_MODE_SERVER — the server-side auto mode classifier, which doesn't charge for classifier overhead, is now the default for Claude API and Enterprise users, and on Bedrock, Vertex, Foundry and gateways; set to 0 to opt out on Bedrock, Vertex, Foundry and gateways; warns on billed fallback
ADD /status — new Auto mode server row shows whether this session's auto mode classifier runs on the server

CC v2.1.277 — 3 placemat changes

2026-09-18T09:00:00Z

ADD AGENTS.md support — in a project with no CLAUDE.md, Claude Code reads AGENTS.md instead; toggle under "Project instructions" in /config (not yet on Bedrock, Vertex or Foundry)
ADD CLAUDE_GATEWAY_PROXY_IS_EGRESS_BOUNDARY env var — for Claude apps gateways whose only egress is a forward proxy; every outbound request hands the proxy the hostname instead of resolving it locally
CHG taskOutputMaxChars no longer has any effect — the deprecated TaskOutput tool was removed; Claude reads a background task's output file with Read instead

CC v2.1.275 — 4 placemat changes

2026-09-17T09:00:00Z

ADD Ctrl Enter / Ctrl X Ctrl S send-now key — interrupts the current turn and sends all queued messages at once; sent and queued messages show in gray until the model receives them
ADD syncClaudeAiSkills / syncClaudeAiPlugins settings — set to false to stop syncing the skills or plugins enabled on your claude.ai account into signed-in terminal sessions
ADD /plugin install <name> — added --marketplace <source>, which offers to add the marketplace before installing the plugin
CHG /plugin install <name> — an npm-source install now runs npm pack --ignore-scripts and is integrity-verified, so the package's install scripts never run

CC v2.1.274 — 5 placemat changes

2026-09-17T09:00:00Z

ADD CLAUDE_CODE_MCP_STARTUP_WAIT_MS env var — bound how long the first non-interactive turn waits for connecting MCP servers; 0 skips the wait
ADD OTEL_LOG_MANAGED_SETTINGS=1 env var — opt in to redacted settings and digests in the new managed-settings-resolved OTel event
ADD MCP_SDK_GENERATION=v1 / MCP_PROTOCOL_NEGOTIATION=legacy env vars — opt out of the v2 MCP client and MCP 2026-07-28 negotiation now default for direct HTTP servers on Bedrock, Vertex, Foundry and telemetry-disabled installs
CHG OTEL_LOG_RAW_API_BODIES — its file:<dir> mode also writes an index.jsonl linking each response to its request file and transcript message
CHG /status — the GitHub connection line now reads "Cloud sessions" instead of "Claude Code on the web"

CC v2.1.273 — 4 placemat changes

2026-09-15T09:00:00Z

ADD CLAUDE_CODE_GATEWAY_HINT_HEADERS env var — opt in to sending x-claude-code-request-class, x-claude-code-agent-type, x-claude-code-prev-tool-durations, x-claude-code-compaction and x-claude-code-context-compacted request headers to LLM gateways
ADD CLAUDE_CODE_AUTO_MODE_SERVER env var — use the platform's server-side auto mode classifier on Bedrock, Vertex and Foundry; those platforms now default to a local classifier instead
CHG /remote-control — from the Claude app, fork a session started this way (or with claude --remote-control); the fork runs as a background session on your computer
CHG /mcp — notifies when a server disconnects mid-session and automatic reconnection gives up

CC v2.1.271 — 8 placemat changes

2026-09-14T09:00:00Z

CHG /fast [on/off] — now works in Claude Code Remote sessions (cloud and self-hosted runners) too, via the host's fast-mode setting or by typing /fast in the session
CHG /config — mouse support in fullscreen mode: the wheel scrolls the list, a click on a value changes it, and the row under the pointer is highlighted
ADD claude self-hosted-runner --drain-marker-file <path> CLI flag — when present at a SIGTERM drain, the runner reports its exit to the server as a host drain (telemetry only)
ADD claude self-hosted-runner --host-config-snapshot disk|memory CLI flag — choose where host config is cached; avoids silently losing it once the config directory exceeds 64 MiB
ADD allowed_domains — per-command field on Bash, PowerShell and Monitor in sandboxed auto mode; the classifier reviews the domains a command needs and opens sandbox access to only those
ADD omitClaudeMd agent frontmatter field (also settable via --agents JSON) — let a custom or plugin subagent run without user, project and local CLAUDE.md files; managed policy files still load
ADD claude plugin install / update — added --accept-command <sha256> to accept exactly the command a previous --json run displayed, instead of -y
CHG modelPricing — the discount multiplier can now run above 1, up to 10, for marked-up internal chargeback rates; the Claude apps gateway pricing block supports the same range

CC v2.1.269 — 6 placemat changes

2026-09-11T09:00:00Z

ADD claude plugin eval CLI command — run a plugin's eval suite against Claude Code; outputs scored, reproducible results as JSON + HTML report
ADD /output-style [name] slash command — list and switch output styles; works over Remote Control and in cloud and headless sessions
ADD bashEditDiffEnabled setting — show a diff of files a Bash command changed in the tool result when the Bash tool handles file edits
ADD OTEL_METRICS_INCLUDE_REPOSITORY env var — tag OpenTelemetry metrics and events with vcs.* repository attributes; commit events also emit vcs.ref.head.* with OTEL_LOG_TOOL_DETAILS
ADD CLAUDE_CODE_GATEWAY_MODEL_DISCOVERY_TIMEOUT_MS env var — extend the LLM gateway /v1/models discovery timeout (default 3 s)
ADD CLAUDE_CODE_WORKFLOW_MAX_CONCURRENT_AGENTS env var — raise the Workflow tool's per-run concurrent agent limit (1–256) for inference-bound fan-outs

CC v2.1.268 — 5 placemat changes

2026-09-10T09:00:00Z

ADD claude self-hosted-runner --remove-session-state CLI flag — delete per-session directories under <base-dir>/_sessions/ when sessions end; off by default
ADD CLAUDE_CODE_WEBFETCH_DEADLINE_MS env var — override the 300-second WebFetch response deadline; set to 0 to disable
ADD gatewayInternalNetworks managed setting — allow /login to a Claude apps gateway on the organization's own public IPv4 block
CHG claude plugin enable/disable — added --json flag for structured output; also available on install, uninstall, and update
CHG CLAUDE_CODE_ENABLE_TODO_TOOLS=1 — clarified: tools are on by default only for Claude 3.x, Opus 4.0–4.7, Sonnet 4.0–4.6, Haiku 4.5; set this to enable on newer models

CC v2.1.267 — 2 placemat changes

2026-09-09T09:00:00Z

ADD maxEffortLevel setting — caps the maximum effort level on every provider (top-level or per model under modelSettings); applies to Bedrock, Vertex, and Foundry
ADD --system-prompt-snapshot off flag — renders the system prompt fresh on every request instead of reusing the conversation's recorded prompt

CC v2.1.265 — 2 placemat changes

2026-09-08T09:00:00Z

CHG --plugin-dir — now accepts a folder of plugins; each child folder with a manifest loads, and additions/removals while running are picked up
ADD forceLoginGatewayUrl managed setting — URL of the Claude apps gateway; machines with this set start as gateway sessions from startup, overriding leftover logins or API keys

CC v2.1.261 — 3 placemat changes

2026-09-04T09:00:00Z

ADD /skill-doctor — shows which loaded skills go unused and what they cost in context, so you can prune them
ADD --append-subagent-system-prompt-file CLI flag — reads the subagent system prompt from a file, for prompts too large to pass on the command line
ADD bashOutputMaxChars / taskOutputMaxChars JSON settings — raise how much Bash command or background-task output Claude receives inline before saving to a file (cap at 128K characters)

CC v2.1.260 — 4 placemat changes

2026-09-03T09:00:00Z

CHG /diff — in fullscreen mode, opens as a panel beside the conversation showing uncommitted changes as Claude edits
CHG Ctrl L in fullscreen — clears the transcript view like a terminal clear; scroll up to see earlier messages
CHG /advisor — text form (/advisor, /advisor <model>, /advisor off) now works in desktop, Remote Control, and headless (-p/Agent SDK) sessions
CHG /reload-plugins — now available in headless sessions (Claude Code Desktop and SDK)

CC v2.1.259 — 4 placemat changes

2026-09-02T09:00:00Z

ADD managedMcpServers managed setting — provide HTTP/SSE MCP servers to every user in the organization (same entry shape as .mcp.json); entries naming a command to run are skipped
ADD deniedMcpServers managed setting — blocklist of managed MCP servers to deny; as of v2.1.259, allowedMcpServers governs only user-added servers and no longer filters managed-mcp.json servers
ADD --permission-prompts none CLI flag — deny any action that would prompt for unattended headless hosts; the active permission mode (including auto mode) still decides normally
CHG claude plugin validate — added --json for a machine-readable validation report

CC v2.1.257 — 6 placemat changes

2026-09-01T09:00:00Z

ADD timeFormat / timeZone JSON settings — control the turn-end clock and transcript timestamp format (12h, 24h, 24h UTC, or strftime pattern) and time zone
ADD CLAUDE_CODE_SUBAGENT_MODEL_FORCE env var — apply CLAUDE_CODE_SUBAGENT_MODEL (or the main model) to every subagent, ignoring per-spawn and agent-definition model overrides
ADD permissions.blockReadsOutsideWorkingDirectories JSON setting — block file reads outside the configured working directories; a one-time prompt appears before the first such read in auto mode
CHG /effort — press s in the interactive picker to switch effort for the current session only, matching /model
CHG /btw — history browsing changed from ←/→ to Shift+←/Shift+→ (or [/])
CHG defaultMode — "bypassPermissions" is now ignored in .claude/settings.json or .claude/settings.local.json; set in user or managed settings, or pass --permission-mode bypassPermissions

CC v2.1.251 — 5 placemat changes

2026-08-28T09:00:00Z

ADD PreModelSwitch / PostModelSwitch hook events — block, confirm, or annotate a model switch before or after it happens
ADD prompt_cache status line script JSON input field — per-session prompt-cache stats (hit ratio, misses, tokens re-cached, warm/cold)
CHG /usage — spend limit bar for gateway users with spend limits; /cost now shows a per-session prompt-cache line (hit ratio, misses, tokens re-cached, warm/cold)
CHG /effort — saves the default effort level per model; each model keeps its own setting when you switch
CHG SessionStart — resume hooks now receive session staleness and estimated re-cache cost

CC v2.1.248 — 5 placemat changes

2026-08-27T09:00:00Z

ADD --restricted CLI flag / CLAUDE_CODE_RESTRICTED=1 env var — removes built-in tools that run commands or code and WebFetch (unless named in --tools); keeps file tools inside the working directory; refuses bypassPermissions; ignores user, project and local settings files
ADD experimental.cacheTtl (agent frontmatter) — per-agent prompt cache TTL ("5m" or "1h"); used when no subagent TTL setting is configured in the session
ADD claude self-hosted-runner --client-label <label> / SELF_HOSTED_RUNNER_CLIENT_LABEL — override the label the runner registers with (default: hostname)
CHG SendMessage / ListAgents — cross-session messaging between sessions on the same machine now available on Bedrock, Vertex, Foundry, and when telemetry is disabled
CHG /status — shows a line explaining a managed-settings load failure or why settings weren't fetched (e.g. Bedrock/Vertex/third-party provider, custom ANTHROPIC_BASE_URL)

CC v2.1.247 — 3 placemat changes

2026-08-26T09:00:00Z

ADD feedbackDrafts JSON setting — set to false to prevent Claude from auto-drafting a feedback report when something goes wrong; draft appears in /feedback
CHG /claude-api — added cost-optimize subcommand (profiles Claude API spend and works through cost levers); updated with Admin API coverage (organization members, invites, workspaces, API keys, rate limit reports, workload identity federation, CMEK)
CHG /loop — self-paced dynamic mode and no-prompt autonomous default now always available, including on Bedrock, Vertex, and Foundry

CC v2.1.246 — 4 placemat changes

2026-08-25T09:00:00Z

CHG /permissions — new Auto mode tab for viewing and editing auto mode classifier rules
CHG /cd — project settings, hooks, .mcp.json servers (behind the usual approval prompt), skills, and agents now take effect immediately after the move instead of on --resume
CHG /code-review — Claude can also start it on its own on Bedrock, Vertex AI, Foundry, through the Claude apps gateway, and when telemetry or non-essential traffic is disabled
CHG /goal — idle sessions start at most three check-ins per goal; your next message allows three more

CC v2.1.243 — 6 placemat changes

2026-08-25T09:00:00Z

ADD modelPicker JSON setting — curate the /model picker with an ordered, labeled list of models (any id spelling, including Vertex/Bedrock ids); entries are appended to or replace the built-in lineup
ADD modelPricing managed setting — set an organization's contracted per-model rates and discount multiplier for /cost, status line, and telemetry cost figures instead of list price
ADD promptCacheTtl / subagentPromptCacheTtl JSON settings — set a 1-hour prompt cache TTL for the main conversation while subagents stay at 5 minutes; for API-key and cloud-provider users
CHG /usage — new Loops breakdown: per-loop run count, total tokens, tokens per run, and last run
CHG /status — new Skipped sources line listing managed settings sources present but not applied; shows GitHub connection status for Claude Code on the web (Pro/Max)
CHG /mcp — shows a managed marker on claude.ai connectors whose authentication is managed by your organization

CC v2.1.239 — 6 placemat changes

2026-08-21T09:00:00Z

ADD claude plugin enable/disable <name>@synced — cloud-synced plugins from claude.ai appear as name@synced; managed with enable/disable <name>@synced; never override a locally installed same-named plugin
ADD /claude-api upgrade — new subcommand; migrates Python projects from anthropic 0.x to 1.x (timeouts use anthropic.Timeout, not httpx.Timeout)
CHG /goal — check-ins back off (30 min → 1 h → 2 h) instead of repeating every 30 min; resuming via claude --resume now restores the active goal
CHG keybindingFlavor: "readline" — extended with word-motion keys: Alt+F and Ctrl/Option+→ stop at end of word, Alt+D deletes to it (Ctrl+Y pastes back), punctuation separates words
CHG ListAgents / SendMessage — ListAgents now reports the session's own name (the identifier peers use to message it) and includes live teammates in its listing
CHG CLAUDE_CODE_RETRY_WATCHDOG — now fails immediately on organization spend-limit and out-of-credits errors instead of waiting indefinitely