An entry is only as true as the day it was written.
Flags move on the server after a release ships. Anthropic's own notes land days later and their documentation later still. Sometimes an entry turns out to be wrong and gets corrected by hand. All of that is recorded against the entry it happened to, and this is the whole of it in the order it happened.
Nothing here replaces an entry. Every line links to the page its release published, still saying what that release said, because a correction is added and dated rather than swapped in.
| When | Entry | What happened |
|---|---|---|
v2.1.302tengu_sunny_locket |
Flag reading movedThe flag server now returns {"mode":"compact"} for tengu_sunny_locket, read as this account. | |
v2.1.300tengu_sunny_locket |
Flag reading movedThe flag server now returns {"mode":"compact"} for tengu_sunny_locket, read as this account. | |
v2.1.290tengu_sunny_locket |
Flag reading movedThe flag server now returns {"mode":"compact"} for tengu_sunny_locket, read as this account. | |
v2.1.283tengu_sunny_locket |
Flag reading movedThe flag server now returns {"mode":"compact"} for tengu_sunny_locket, read as this account. | |
v2.1.283tengu_sunny_locket |
Flag reading movedThe flag server now returns {"mode":"compact"} for tengu_sunny_locket, read as this account. | |
v2.1.282tengu_smooth_chipmunk |
Flag reading movedThe flag server now returns on for tengu_smooth_chipmunk, read as this account. | |
v2.1.281tengu_smooth_chipmunk |
Flag reading movedThe flag server now returns on for tengu_smooth_chipmunk, read as this account. | |
v2.1.281tengu_smooth_chipmunk |
Flag reading movedThe flag server now returns on for tengu_smooth_chipmunk, read as this account. | |
v2.1.269tengu_smooth_chipmunk |
Flag reading movedThe flag server now returns on for tengu_smooth_chipmunk, read as this account. | |
v2.1.261tengu_smooth_chipmunk |
Flag reading movedThe flag server now returns on for tengu_smooth_chipmunk, read as this account. | |
v2.1.261tengu_smooth_chipmunk |
Flag reading movedThe flag server now returns on for tengu_smooth_chipmunk, read as this account. | |
v2.1.273tengu_quiet_dolphin |
Flag reading movedThe flag server now returns on for tengu_quiet_dolphin, read as this account. | |
v2.1.248tengu_nifty_lemur |
Flag reading movedThe flag server now returns {"autoContinue":true,"enabled":true,"label":"Reset your session limit now","noticeLine":"/limit-reset to reset your session limit now · uses weekly limit · 1/week","spentLine":"Weekly reset used · available again {date}","successLine":"Session limit reset · next reset available {date} · your weekly limit still applies","unavailableLine":"Couldn't reset your session limit right now · try again in a moment","version":1} for tengu_nifty_lemur, read as this account. | |
v2.1.248tengu_nifty_lemur |
Flag reading movedThe flag server now returns {"autoContinue":true,"enabled":true,"label":"Reset your session limit now","noticeLine":"/limit-reset to reset your session limit now · uses weekly limit · 1/week","spentLine":"Weekly reset used · available again {date}","successLine":"Session limit reset · next reset available {date} · your weekly limit still applies","unavailableLine":"Couldn't reset your session limit right now · try again in a moment","version":1} for tengu_nifty_lemur, read as this account. | |
v2.1.284tengu_lantern_wick_text |
Flag reading movedThe flag server now returns "Usage limit reached; a short grace allowance remains, then this turn is cut off without warning. Judge what's left: if it's genuinely only a few steps, finish it properly, then stop and say so without extra polishing. Otherwise don't attempt it all: finish the piece in hand and at most two more like it, then stop. The allowance also pays for any subagents you have running: they don't get this message and will keep going, so it's up to you how to handle them. Either way, end by telling the user their usage limit was reached, what's done and what's left." for tengu_lantern_wick_text, read as this account. | |
v2.1.223tengu_juniper_relay |
Flag reading movedThe flag server now returns on for tengu_juniper_relay, read as this account. | |
v2.1.251tengu_juniper_relay |
Flag reading movedThe flag server now returns on for tengu_juniper_relay, read as this account. | |
v2.1.299tengu_glowing_lark |
Flag reading movedThe flag server now returns on for tengu_glowing_lark, read as this account. | |
v2.1.299tengu_glowing_lark |
Flag reading movedThe flag server now returns on for tengu_glowing_lark, read as this account. | |
v2.1.265tengu_curious_tower_stateless_models |
Flag reading movedThe flag server now returns "" for tengu_curious_tower_stateless_models, read as this account. | |
v2.1.310headersHelper |
Documentation arrivedAnthropic's documentation has since written up headersHelper, on Configuration reference.
the line in the docs> > A local (`stdio`) entry can repeat `command`, `args`, `env`, `envHelper` and `envHelperArgs`. A remote (`http` or `sse`) or web search entry can repeat `headersHelper` and `headersHelperArgs`; an entry that gives `headersHelper` here n… |
|
v2.1.311HTTPS_PROXY |
Documentation arrivedAnthropic's documentation has since written up HTTPS_PROXY, on Configuration reference.
the line in the docs> On macOS and Windows the Cowork workspace VM is handed a copy of the script when it starts and evaluates it for each request itself; there `myIpAddress()` returns the VM's internal address rather than the device's, so a script that choos… |
|
v2.1.310HTTPS_PROXY |
Documentation arrivedAnthropic's documentation has since written up HTTPS_PROXY, on Configuration reference.
the line in the docs> On macOS and Windows the Cowork workspace VM is handed a copy of the script when it starts and evaluates it for each request itself; there `myIpAddress()` returns the VM's internal address rather than the device's, so a script that choos… |
|
v2.1.311PreToolUse |
Documentation arrivedAnthropic's documentation has since written up PreToolUse, on Changelog.
the line in the docs* Changed a failed `PreToolUse` or `PermissionRequest` hook with `"shell": "powershell"` to block the call on PCs without Git for Windows unless it sets `args` or `"onFailure": "continue"`. If written for Bash: remove `shell`, add `"onFail… |
|
v2.1.293/run |
Documentation arrivedA small documentation edit on Command line settings touched a line naming /run after this was published.
the line in the docs| `claude-science sandbox approve` | Linux only, version 0.1.71 or later. Approve your own copy of bubblewrap or socat for the sandbox. `--bwrap <path>` and `--socat <path>` name the programs, `--yes` skips the confirmation and is required… |
|
v2.1.290/run |
Documentation arrivedA small documentation edit on Command line settings touched a line naming /run after this was published.
the line in the docs| `claude-science sandbox approve` | Linux only, version 0.1.71 or later. Approve your own copy of bubblewrap or socat for the sandbox. `--bwrap <path>` and `--socat <path>` name the programs, `--yes` skips the confirmation and is required… |
|
v2.1.286bwrap |
Documentation arrivedA small documentation edit on Command line settings touched a line naming bwrap after this was published.
the line in the docs| `claude-science sandbox approve` | Linux only, version 0.1.71 or later. Approve your own copy of bubblewrap or socat for the sandbox. `--bwrap <path>` and `--socat <path>` name the programs, `--yes` skips the confirmation and is required… |
|
v2.1.311/config |
Documentation arrivedAnthropic's documentation has since written up /config, on Error reference.
the line in the docs* Run `/config` in the lead session and set **Teammate mode** to `in-process`, then ask Claude to start the teammate again. You don't need to find the rule or restart the lead. An in-process teammate [runs under the lead's live deny rules]… |
|
v2.1.311/config |
Documentation arrivedAnthropic's documentation has since written up /config, on Error reference.
the line in the docs* Run `/config` in the lead session and set **Teammate mode** to `in-process`, then ask Claude to start the teammate again. You don't need to find the rule or restart the lead. An in-process teammate [runs under the lead's live deny rules]… |
|
v2.1.311agent_id |
Documentation arrivedAnthropic's documentation has since written up agent_id, on Agent SDK reference - TypeScript.
the line in the docs`agent_id` identifies the subagent that produced the message and is absent on main-thread messages. The value equals the `task_id` on that subagent's [`task_started`](#sdktaskstartedmessage) and other task events, and is unchanged when the… |
|
v2.1.296updatedPermissions |
Documentation arrivedAnthropic's documentation has since written up updatedPermissions, on Agent SDK reference - TypeScript.
the line in the docsIf you return `allow` with more than 4,096 items in `updatedPermissions`, Claude Code treats the result as invalid and denies the tool call. Each update counts as one item, and so does each entry in its `rules` or `directories` list. The d… |
|
v2.1.296updatedPermissions |
Documentation arrivedAnthropic's documentation has since written up updatedPermissions, on Agent SDK reference - TypeScript.
the line in the docsIf you return `allow` with more than 4,096 items in `updatedPermissions`, Claude Code treats the result as invalid and denies the tool call. Each update counts as one item, and so does each entry in its `rules` or `directories` list. The d… |
|
v2.1.296updatedPermissions |
Documentation arrivedAnthropic's documentation has since written up updatedPermissions, on Agent SDK reference - TypeScript.
the line in the docsIf you return `allow` with more than 4,096 items in `updatedPermissions`, Claude Code treats the result as invalid and denies the tool call. Each update counts as one item, and so does each entry in its `rules` or `directories` list. The d… |
|
v2.1.295updatedPermissions |
Documentation arrivedAnthropic's documentation has since written up updatedPermissions, on Agent SDK reference - TypeScript.
the line in the docsIf you return `allow` with more than 4,096 items in `updatedPermissions`, Claude Code treats the result as invalid and denies the tool call. Each update counts as one item, and so does each entry in its `rules` or `directories` list. The d… |
|
v2.1.311hook_started |
Documentation arrivedAnthropic's documentation has since written up hook_started, on Agent SDK reference - TypeScript.
the line in the docsOf the [`hook_progress`](#sdkhookprogressmessage) messages a `SessionStart` or `Setup` hook emits before the handshake completes, you get only the newest, which carries all of the hook's output so far. `startup()` holds that message, the h… |
|
v2.1.311PreToolUse |
Documentation arrivedA small documentation edit on Modifying system prompts touched a line naming PreToolUse after this was published.
the line in the docs* To stop only `@` file mentions from expanding, set [`CLAUDE_CODE_DISABLE_FILE_MENTIONS=1`](https://code.claude.com/docs/en/env-vars#variables) instead, on Claude Code v2.1.299 or later. Claude then gets the mentioned paths plus a note to… |
|
v2.1.307set_model |
Documentation arrivedA small documentation edit on Configure your agent touched a line naming set_model after this was published.
the line in the docs* **`setModel()` / `set_model()`**: switches the model. Call it with no model to switch to [Claude Code's default model](https://code.claude.com/docs/en/model-config.md#default-model-setting) rather than the `model` you passed in options. … |
|
v2.1.311maxBudgetUsd |
Documentation arrivedA small documentation edit on How the agent loop works touched a line naming maxBudgetUsd after this was published.
the line in the docsYou can cap the loop with `max_turns` / `maxTurns`. Count each turn with tool calls, plus one for the final text-only response. Without that extra turn, the run ends with a `ResultMessage` of subtype `error_max_turns` and no final response… |
|
v2.1.311/mcp |
Documentation arrivedA small documentation edit on Error reference touched a line naming /mcp after this was published.
the line in the docsAn MCP server built on Java MCP SDK 0.11.0 through 0.17.0 refused the connection. Those SDK versions can't parse the `form` and `url` [elicitation modes](https://code.claude.com/docs/en/mcp.md#elicitation-modes-claude-code-declares) that C… |
|
v2.1.311/effort |
Documentation arrivedAnthropic's documentation has since written up /effort, on Claude Code changelog.
the line in the docs* Fixed the `/model` and `/effort` cache warning saying the re-read waits for your next message; a change made while Claude is working can trigger it sooner |
|
v2.1.310/login |
Documentation arrivedA small documentation edit on Use Claude Code with Chrome touched a line naming /login after this was published.
the line in the docsChrome integration also requires signing in with `/login`. If you authenticate with an API key or a long-lived token from [`claude setup-token`](https://code.claude.com/docs/en/authentication#generate-a-long-lived-token), Claude Code keeps… |
|
v2.1.309cursor |
Documentation arrivedA small documentation edit on Use Claude Code with a screen reader touched a line naming cursor after this was published.
the line in the docsClaude Code keeps the terminal cursor on the input caret, so your screen reader's read-current-line command reads the prompt you're editing. As you type at the end of the input line, or press `Backspace` there, Claude Code writes only the … |
|
v2.1.311tengu_wobbly_petal |
Flag reading movedThe flag server now returns null for tengu_wobbly_petal, read as this account. | |
v2.1.206tengu_umber_kestrel |
Flag reading movedThe flag server now returns off for tengu_umber_kestrel, read as this account. | |
v2.1.239tengu_toasty_breeze |
Flag reading movedThe flag server now returns {"enabled":false,"version":0} for tengu_toasty_breeze, read as this account. | |
v2.1.239tengu_toasty_breeze |
Flag reading movedThe flag server now returns {"enabled":false,"version":0} for tengu_toasty_breeze, read as this account. | |
v2.1.307tengu_sunny_locket |
Flag reading movedThe flag server now returns {"mode":"off"} for tengu_sunny_locket, read as this account. | |
v2.1.302tengu_sunny_locket |
Flag reading movedThe flag server now returns {"mode":"off"} for tengu_sunny_locket, read as this account. | |
v2.1.300tengu_sunny_locket |
Flag reading movedThe flag server now returns {"mode":"off"} for tengu_sunny_locket, read as this account. | |
v2.1.290tengu_sunny_locket |
Flag reading movedThe flag server now returns {"mode":"off"} for tengu_sunny_locket, read as this account. |