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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 v2.1.250 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_tool_cgroup

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

On Linux you can cap memory for shell commands so a runaway process cannot eat your machine.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.233.

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

No release here has a gate table behind it for this flag. Most published releases have none at all: the readings exist only for versions the pipeline captured flag state on.

Changelog entries naming it

  1. v2.1.246Late attach, release and OOM-kill accounting for capped processes

    Capped processes can be attached late, released, and have their out-of-memory kills counted; still off.

    gate cited by this entry

  2. v2.1.246Tool 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.

    gate cited by this entry

  3. v2.1.233Bash and PowerShell tools can run under a memory limit on Linux

    On Linux you can cap memory for shell commands so a runaway process cannot eat your machine.

    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_tool, up to twelve of them.

tengu_tool_cgroup_exclude_classesMemory limits now reach npm, git, tmux, LSP, MCP and hooks, but everything except Bash is excluded. never mined tengu_tool_memory_cgroupOn Linux you can cap memory for shell commands so a runaway process cannot eat your machine. 2.1.233 tengu_tool_pearNo description from anybody. 2.1.138 tengu_tool_result_dedupNo description from anybody. never mined tengu_tool_result_persistenceNo description from anybody. never mined tengu_tool_search_mode_decisionNo description from anybody. never mined tengu_tool_search_unsupported_modelsNo description from anybody. 2.1.138 tengu_tool_use_diff_computedWriting over a very large file skips diff computation, so it no longer stalls. never mined tengu_tool_use_granted_in_configNo description from anybody. never mined tengu_tool_use_show_permission_requestNo description from anybody. never mined tengu_tool_use_tool_result_mismatch_errorError reports about mismatched tool calls now scrub odd identifiers instead of sending them raw. 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.