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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.248 ·

Transcript store fence is wired but nothing in this build can trip it

A latch can make a session stop writing its transcript, but nothing can trip it here.

Nothing to try yet In Development
JSON All of v2.1.248
Nothing to try yetTier: how much it should matter to you
2Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
SessionsArea: what it touches
In DevelopmentKind: in v2.1.248,
What probably matters to youSection of the release

The fence arms only on a StoreFenced error that no code in this build creates.

What

The transcript writer has a new latch that, once armed, makes the session stop writing its transcript entirely: appends and queue drains rethrow, session metadata re-append returns early, and the compaction backstop is skipped. It arms only on a write error tagged with the new code StoreFenced, and nothing in this build creates such an error.

Details
  • The StoreFenced string appears once, at its declaration; the predicate testing for it has only readers, no producer.
  • An emitter would have to come from the storage backend, which is loaded from a dynamically required chunk and only runs under storage v5, itself behind tengu_hover_rest with a fallback of off.
  • Neither the field nor the constant exists in v2.1.247.
Evidence

StoreFenced

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Read from
Feature flag
tengu_hover_rest Off in both readings

The flag server returned off for the account this site reads and for the anonymous baseline. A reading of off cannot rule out a rollout these two readings sit outside of.

This account: off · anonymous baseline: off · compiled default in v2.1.248: off

Read once, for one account on one subscription tier, against v2.1.248. 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 off for tengu_hover_rest, 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 nothing at all, having stopped carrying it for tengu_hover_rest, 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 →

See this entry in the whole of v2.1.248 →

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