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Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.268 ·

Tool-additions mid-conversation tether reset gated by tengu_lucid_anchor

Adding tools mid-conversation can still force a session reset, gated by an unread flag

TierNothing to try yethow much it should matter to you
Useful2my rating, 1 to 5
Signal3worth watching, 1 to 5
AreaConversation Threadingwhat it touches
KindIn Developmentin v2.1.268,
Nothing to try yet No documentation found

Adding tools mid-conversation can still force a session reset, gated by an unread flag

What

When tools are added partway through a conversation, Claude Code's server-side continuation planner decides whether to keep using the same underlying thread or reset and start a new one. A new check now controls this: if a flag called tengu_lucid_anchor is off, adding tools mid-conversation still forces the thread to reset rather than continue.

Why

This means whether tool additions can continue smoothly in the same thread, instead of forcing a reset, currently depends on this flag's setting.

Read from
Feature flag
tengu_lucid_anchor Not enough to say

Nothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.

This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.268: off

Read once, for one account on one subscription tier, against v2.1.268. It isn't a statement about your account. What a flag value here can and cannot tell you

What has happened since
Flag reading moved The flag server now returns on for tengu_lucid_anchor, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns off for tengu_lucid_anchor, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns on for tengu_lucid_anchor, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.

See this across every release →

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtNothing has been read yet about how the `tengu_lucid_anchor` flag is set for any account, so it's unknown whether resets are currently being…
The name it cites is new in this buildNew in this build: tengu_lucid_anchor

See this entry in the whole of v2.1.268 →

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