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Sweep 19 Sep 2026 · 02:36Z Build v2.1.278 500 read Stable v2.1.267 Latest v2.1.278 Next v2.1.278 Feeds RSS JSON llms.txt Unofficial
Reference Feature flags
One name

tengu_tool_cpu_by_phase

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.

Familyfeature flagFeature flags
Builds0of the 122 on this box
First seen — never in a mined build
Last seen — never in a mined build
Statusnever minedas of v2.1.278

What it is

Remote sessions now report per-phase CPU usage split between CLI and tool subprocesses.

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.261.

Presence across releases

0

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.

First cited

2

The earliest release whose published evidence quoted tengu_tool_cpu_by_phase was v2.1.261, 4 Sep 2026. That is the oldest release this project wrote about it, so it is a floor on the name's age and not the release that introduced it. It is not a presence reading: which builds carried the name is the table above.

ReleaseDateThe span that was quoted
v2.1.2614 Sep 2026tengu_tool_cpu_by_phase
v2.1.27315 Sep 2026tengu_tool_cpu_by_phase: no shell CPU split

Gate readings

0

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.

Names beside it

Every feature flag in the inventory starting tengu_tool, up to twelve of them.

tengu_tool_cgroupOn Linux you can cap memory for shell commands so a runaway process cannot eat your machine. never mined 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_detachA long-running tool call can now be moved to the background instead of blocking when a new message comes in v2.1.277 tengu_tool_memory_cgroupOn Linux you can cap memory for shell commands so a runaway process cannot eat your machine. v2.1.233 tengu_tool_pearNo description from anybody. v2.1.138 tengu_tool_result_dedupNo description from anybody. never mined tengu_tool_result_pairing_repairedTool-result repair now detects and reports 'misplaced' tool results in debug output never mined tengu_tool_result_persistenceNo description from anybody. never mined tengu_tool_schema_sizesA new event breaks down tool schema sizes by category, deduplicated and capped at 512 hashes. never mined tengu_tool_search_mode_decisionNo description from anybody. never mined tengu_tool_search_unsupported_modelsNo description from anybody. v2.1.138 tengu_tool_use_diff_computedWriting over a very large file skips diff computation, so it no longer stalls. 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.