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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 v2.1.246 ·

Tool memory cgroups reworked, still off unless turned on

Memory caps on processes Claude starts were rebuilt but stay off unless you set the limit variable.

Nothing to try yet Notable In Development
JSON All of v2.1.246
Nothing to try yetTier: how much it should matter to you
3Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
SandboxArea: what it touches
In DevelopmentKind: in v2.1.246,
What probably matters to youSection of the release

Tool memory cgroups are reworked and gated on CLAUDE_CODE_TOOL_MEMORY_LIMIT or a remote flag that falls back to false.

What

The Linux and WSL feature that caps the memory of processes Claude Code spawns was rebuilt. It stays off unless CLAUDE_CODE_TOOL_MEMORY_LIMIT names a limit or the remote flag tengu_tool_memory_cgroup reads true; the in-source fallback is false, so with no server value nothing is capped. Setting the env var to none disables it outright.

Details
  • If the enclosing cgroup already caps the process it is reused rather than nested, reported as nested.
  • If the machine is too small for the default cap the feature disables itself, logging tool cgroup: disabled (host too small for the default cap).
  • A cgroup directory that disappears is re-created (recreated) or the feature is switched off (vanished).
  • Every outcome reports to tengu_tool_cgroup.
Evidence

if (o === void 0 && C.read("tengu_tool_memory_cgroup", !1) !== !0) return;

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

Read from
Feature flag
tengu_tool_memory_cgroup 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 v2.1.246: not a boolean we can read

Read once, for one account on one subscription tier, against v2.1.246. 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_tool_memory_cgroup, 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_tool_memory_cgroup, 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 v2.1.246 →

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