Source Intelligence
Follow Discord
Sweep 28 Aug 2026 · 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.250 Feeds RSS JSON llms.txt

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

Reference / Feature flags

tengu_teal_corbel

A Claude Code feature flag, read out of the shipped bundle. It has been in the build since v2.1.221, including the newest one read.

What it is

Artifact live-update watching now carries the plumbing needed for automatic comment replies and cancellation.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.221.

Presence across releases

ReleasesReadingDeclared typeDefault
2.1.245 – 2.1.250 5 releases never mined — —
2.1.221 – 2.1.243 22 releases in the build — bool:false

A row reading never mined is a release with no archived bundle behind it. Nothing was read out of it, so nothing here says whether the name was in it. A declared type or a default is only ever what that release's own bundle stated.

Gate readings

ReleaseResolvedThis accountAnonymousCompiled default
v2.1.248 On for this account, and not off by default on on on
v2.1.246 On for this account, and not off by default on on on
v2.1.239 On for this account, and not off by default on on on
v2.1.235 On for this account, and not off by default on on on
v2.1.234 On for this account, and not off by default on off on
v2.1.227 read on another version On for this account, and not off by default on on on
v2.1.221 read on another version On for this account, and not off by default on on on

Two arms, because they disagree: this account is the one account this site reads and anonymous is a baseline with no identity attached. A reading says nothing about your account, and off cannot rule out a rollout both readings sit outside of. What these readings can and cannot show.

Changelog entries naming it

  1. v2.1.248Permission prompts say whose comment is being acted on

    Comment permission prompts can name whose comment it is, behind an artifact-comments env var.

    gate cited by this entry

  2. v2.1.246Artifact comments refuse organization service keys

    Artifact comments now explain org service key failures clearly, but comments themselves need an env var.

    gate cited by this entry

  3. v2.1.239Artifact request schema: auto_reply gated, embeds compiled out

    Artifact auto-reply appears only with comments enabled, and an embeds field is compiled out entirely.

    gate cited by this entry

  4. v2.1.239Artifact watch entries gain unread-comment counters behind the comments flag

    Artifact watches can track unread comments and replies, but only with the comments flag on.

    gate cited by this entry

  5. v2.1.235Artifact MCP is on by default

    The built-in artifact MCP server is now on for everyone unless you set the env var to disable it.

    gate cited by this entry

  6. v2.1.234Resuming stopped artifact auto-replies, and marking comments the artifact posted itself

    Comments Claude posts to an artifact are now marked as its own, so it stops replying to itself.

    gate cited by this entry

  7. v2.1.227Artifact auto-replies stop describing their own plumbing

    Automatic artifact comment replies now sound like plain acknowledgements instead of describing internal plumbing.

    gate cited by this entry

  8. v2.1.227Artifact tool can resolve comment threads, behind an off-by-default flag

    Claude could mark a comment thread on a published artifact as resolved, but the path is off.

    gate cited by this entry

  9. v2.1.221Artifact live-update arming carries auto-react wiring

    Artifact live-update watching now carries the plumbing needed for automatic comment replies and cancellation.

    gate cited by this entry

  10. v2.1.221Comment replies always ask, and the prompt names who will see them

    Replying to an artifact comment always asks first, and tells you whether the artifact is shared.

    gate cited by this entry

  11. v2.1.221Artifact auto-reply subscriptions can be stopped from the cancel gestures

    Escape or double ctrl+x ctrl+k now also turns off automatic replies to comments on your artifacts.

    gate cited by this entry

  12. v2.1.221New artifact comment threads: read, reply, resolve

    Reading, replying to and resolving comment threads on published artifacts is built in but off unless enabled.

    gate cited by this entry

Documentation pages

None of Anthropic's documentation pages this site has a copy of carries this name.

Names beside it

Every feature flag in the inventory starting tengu, up to twelve of them.

tengu_1p_event_batch_configNo description from anybody. never mined tengu_account_plugins_sync_enabledPlugins you enabled on claude.ai can be pulled to your machine, but only your account server can enable it. never mined tengu_account_skills_sync_enabledSyncing skills from your claude.ai account stays off, but its checks were reshaped for other synced resources too. 2.1.234 tengu_adopt_claimA stale session claim now keeps its entries, marked stale, instead of throwing them away. never mined tengu_adopt_linkAdopting an agent's transcript now hard-links the file, copying only when linking is impossible. never mined tengu_adopt_relinkOn startup, subagent transcripts stored as symlinks are converted to hard links or copies. never mined tengu_advisor_unknown_contentAdvisor output you couldn't see now shows an error or a clear "declined to advise" message. never mined tengu_agent_hooks_origin_untrustedAgents in untrusted folders can no longer define inline MCP servers; trust the project to allow it. never mined tengu_agent_list_attachNo description from anybody. 2.1.138 tengu_agent_proxy_download_queueDownload backlog on the agent proxy is now reported as a telemetry event. never mined tengu_agent_tool_selectedSDK result messages now include a summary of the subagents your session started. never mined tengu_agent_worktree_cwd_escape_blockedAgent commands now have a concrete worktree boundary, so escapes get blocked with a clearer log line. never mined

Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the feature flag does. All feature flags.