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 |
|---|---|---|
v2.1.261tengu_smooth_chipmunk |
Flag reading movedThe flag server now returns off for tengu_smooth_chipmunk, read as this account. | |
v2.1.261tengu_smooth_chipmunk |
Flag reading movedThe flag server now returns off for tengu_smooth_chipmunk, read as this account. | |
v2.1.299tengu_glowing_lark |
Flag reading movedThe flag server now returns off for tengu_glowing_lark, read as this account. | |
v2.1.299tengu_glowing_lark |
Flag reading movedThe flag server now returns off for tengu_glowing_lark, read as this account. | |
v2.1.265tengu_curious_tower_stateless_models |
Flag reading movedThe flag server now returns "fable-5-1, opus-5, opus-4-8" for tengu_curious_tower_stateless_models, 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. | |
v2.1.299tengu_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. | |
v2.1.302idleCompaction |
Documentation arrivedA small documentation edit on How Claude Code uses prompt caching touched a line naming idleCompaction after this was published.
the line in the docsIf you leave a long conversation idle while it is on the [one-hour TTL](#which-ttl-each-request-gets), Claude Code can compact it. To turn idle compaction off, set [`idleCompaction`](https://code.claude.com/docs/en/settings-reference#idlec… |
|
v2.1.302idleCompaction |
Documentation arrivedA small documentation edit on How Claude Code uses prompt caching touched a line naming idleCompaction after this was published.
the line in the docsIf you leave a long conversation idle while it is on the [one-hour TTL](#which-ttl-each-request-gets), Claude Code can compact it. To turn idle compaction off, set [`idleCompaction`](https://code.claude.com/docs/en/settings-reference#idlec… |
|
v2.1.302idleCompaction |
Documentation arrivedA small documentation edit on How Claude Code uses prompt caching touched a line naming idleCompaction after this was published.
the line in the docsIf you leave a long conversation idle while it is on the [one-hour TTL](#which-ttl-each-request-gets), Claude Code can compact it. To turn idle compaction off, set [`idleCompaction`](https://code.claude.com/docs/en/settings-reference#idlec… |
|
v2.1.309cursor |
Documentation arrivedAnthropic's documentation has since written up cursor, on Customize keyboard shortcuts.
the line in the docs* **Vim mode** handles input at the text input level: cursor movement, modes, and motions |
|
v2.1.310mcp_tool |
Documentation arrivedAnthropic's documentation has since written up mcp_tool, on Hooks reference.
the line in the docsSetup hooks have access to `CLAUDE_ENV_FILE`. If your hook writes variables to that file, they persist into subsequent Bash commands for the session, as in [SessionStart hooks](#persist-environment-variables). Only `type: "command"` hooks … |
|
v2.1.309mcp_tool |
Documentation arrivedAnthropic's documentation has since written up mcp_tool, on Hooks reference.
the line in the docsSetup hooks have access to `CLAUDE_ENV_FILE`. If your hook writes variables to that file, they persist into subsequent Bash commands for the session, as in [SessionStart hooks](#persist-environment-variables). Only `type: "command"` hooks … |
|
v2.1.305claude plugin validate |
Documentation arrivedA small documentation edit on Plugin manifest reference touched a line naming claude plugin validate after this was published.
the line in the docs| [`experimental.monitors`](#monitors) | Path, or inline array | A `.json` file holding the monitors array, or the array itself. Defaults to `monitors/monitors.json`. A top-level `monitors` key still loads, with a `claude plugin validate` … |
|
v2.1.305claude plugin validate |
Documentation arrivedA small documentation edit on Plugin manifest reference touched a line naming claude plugin validate after this was published.
the line in the docs| [`experimental.monitors`](#monitors) | Path, or inline array | A `.json` file holding the monitors array, or the array itself. Defaults to `monitors/monitors.json`. A top-level `monitors` key still loads, with a `claude plugin validate` … |
|
v2.1.304CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC |
Documentation arrivedA small documentation edit on Add components to a plugin touched a line naming CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC after this was published.
the line in the docs* **Minimum version**: on Amazon Bedrock, Claude Platform on AWS, Google Cloud's Agent Platform, or Microsoft Foundry, or with `DISABLE_TELEMETRY` or `CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC` set, monitors require Claude Code v2.1.310 or … |
|
v2.1.300updatedInput |
Documentation arrivedA small documentation edit on Automate actions with hooks touched a line naming updatedInput after this was published.
the line in the docs* When multiple `PreToolUse` hooks return [`updatedInput`](https://code.claude.com/docs/en/hooks#pretooluse) to rewrite a tool's input, Claude Code doesn't merge the rewrites or guarantee which rewrite the tool runs with. Avoid having more… |
|
v2.1.300updatedInput |
Documentation arrivedA small documentation edit on Automate actions with hooks touched a line naming updatedInput after this was published.
the line in the docs* When multiple `PreToolUse` hooks return [`updatedInput`](https://code.claude.com/docs/en/hooks#pretooluse) to rewrite a tool's input, Claude Code doesn't merge the rewrites or guarantee which rewrite the tool runs with. Avoid having more… |
|
v2.1.295updatedInput |
Documentation arrivedA small documentation edit on Automate actions with hooks touched a line naming updatedInput after this was published.
the line in the docs* When multiple `PreToolUse` hooks return [`updatedInput`](https://code.claude.com/docs/en/hooks#pretooluse) to rewrite a tool's input, Claude Code doesn't merge the rewrites or guarantee which rewrite the tool runs with. Avoid having more… |
|
v2.1.307PreToolUse |
Documentation arrivedA small documentation edit on Automate actions with hooks touched a line naming PreToolUse after this was published.
the line in the docs* When multiple `PreToolUse` hooks return [`updatedInput`](https://code.claude.com/docs/en/hooks#pretooluse) to rewrite a tool's input, Claude Code doesn't merge the rewrites or guarantee which rewrite the tool runs with. Avoid having more… |
|
v2.1.310ANTHROPIC_BASE_URL |
Documentation arrivedA small documentation edit on Speed up responses with fast mode touched a line naming ANTHROPIC_BASE_URL after this was published.
the line in the docs* You point `ANTHROPIC_BASE_URL` at your gateway and set [`ANTHROPIC_API_KEY`](https://code.claude.com/docs/en/llm-gateway-connect#set-the-base-url-and-credential) to a gateway-issued key that isn't in the format of an Anthropic API key. |
|
v2.1.309ANTHROPIC_API_KEY |
Documentation arrivedA small documentation edit on Speed up responses with fast mode touched a line naming ANTHROPIC_API_KEY after this was published.
the line in the docs* You point `ANTHROPIC_BASE_URL` at your gateway and set [`ANTHROPIC_API_KEY`](https://code.claude.com/docs/en/llm-gateway-connect#set-the-base-url-and-credential) to a gateway-issued key that isn't in the format of an Anthropic API key. |
|
v2.1.309ANTHROPIC_API_KEY |
Documentation arrivedA small documentation edit on Speed up responses with fast mode touched a line naming ANTHROPIC_API_KEY after this was published.
the line in the docs* You point `ANTHROPIC_BASE_URL` at your gateway and set [`ANTHROPIC_API_KEY`](https://code.claude.com/docs/en/llm-gateway-connect#set-the-base-url-and-credential) to a gateway-issued key that isn't in the format of an Anthropic API key. |
|
v2.1.310tengu_cosmic_sketch |
Flag reading movedThe flag server now returns on for tengu_cosmic_sketch, read as this account. | |
v2.1.310tengu_cosmic_sketch |
Flag reading movedThe flag server now returns on for tengu_cosmic_sketch, 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. | |
v2.1.283tengu_sunny_locket |
Flag reading movedThe flag server now returns {"mode":"off"} for tengu_sunny_locket, read as this account. | |
v2.1.283tengu_sunny_locket |
Flag reading movedThe flag server now returns {"mode":"off"} for tengu_sunny_locket, read as this account. | |
v2.1.282tengu_smooth_chipmunk |
Flag reading movedThe flag server now returns off for tengu_smooth_chipmunk, read as this account. | |
v2.1.281tengu_smooth_chipmunk |
Flag reading movedThe flag server now returns off for tengu_smooth_chipmunk, read as this account. | |
v2.1.281tengu_smooth_chipmunk |
Flag reading movedThe flag server now returns off for tengu_smooth_chipmunk, read as this account. | |
v2.1.269tengu_smooth_chipmunk |
Flag reading movedThe flag server now returns off for tengu_smooth_chipmunk, read as this account. | |
v2.1.261tengu_smooth_chipmunk |
Flag reading movedThe flag server now returns off for tengu_smooth_chipmunk, read as this account. | |
v2.1.261tengu_smooth_chipmunk |
Flag reading movedThe flag server now returns off for tengu_smooth_chipmunk, read as this account. | |
v2.1.273tengu_quiet_dolphin |
Flag reading movedThe flag server now returns off for tengu_quiet_dolphin, read as this account. | |
v2.1.248tengu_nifty_lemur |
Flag reading movedThe flag server now returns {"enabled":false,"version":0} for tengu_nifty_lemur, read as this account. | |
v2.1.248tengu_nifty_lemur |
Flag reading movedThe flag server now returns {"enabled":false,"version":0} for tengu_nifty_lemur, read as this account. |