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Sweep 28 Aug 2026 · 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.251 Feeds RSS JSON llms.txt
Reading a new release v2.1.251 Analysing changes · 2/5 Deeper second pass · 0/5 agents 427 findings $12.75 so far

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_saddle_lantern

A Claude Code feature flag, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.

What it is

The memory prompt variant and the skill-suggestion rollout are now fields on the process config.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.232.

Presence across releases

The miner has never read a build containing this name. It is here because a changelog entry of ours names it, which is evidence that it existed and not evidence of which releases carried it. The inventory starts at v2.1.138 and everything older than that was never mined.

Gate readings

ReleaseResolvedThis accountAnonymousCompiled default
v2.1.248 Gate removed from the code on on not a boolean we can read
v2.1.232 read on another version Gate removed from the code on on not a boolean we can read

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. v2.1.248Skill suggestion card, off by default

    A card suggesting standalone skills only fires when you ask, unless a server flag flips.

    gate cited by this entry

  2. v2.1.248Skill-suggestion and plugin-install cards, behind a flag

    Cards suggesting skills and installing plugins are built but deferred.

    gate cited by this entry

  3. v2.1.232Two feature decisions moved onto the shared process config object

    The memory prompt variant and the skill-suggestion rollout are now fields on the process config.

    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.