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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_prompt_shell_permission

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

Inline shell commands in a skill's instructions can now be handed to the model to run explicitly instead of executing silently

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.271.

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

1

The earliest release whose published evidence quoted tengu_prompt_shell_permission was v2.1.271, 14 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
v2.1.27114 Sep 2026tengu_prompt_shell_permission

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_prompt, up to twelve of them.

tengu_prompt_cache_1h_configWhether a one-hour prompt cache is allowed can now be overridden per agent and can ignore overage. v2.1.138 tengu_prompt_cache_breakCache diagnostics know when the baseline came from disk and skip misleading difference reports. never mined tengu_prompt_cache_diagnosis_receivedMCP server error lines are escaped before display, plus minor telemetry and version-string cleanups. never mined tengu_prompt_cache_diagnosticsCache diagnostics know when the baseline came from disk and skip misleading difference reports. v2.1.138 tengu_prompt_invisible_stripFleet's command bar and reply composer now strip invisible characters and block sending if any are found never mined tengu_prompt_suggestionMatching your reply to a suggested prompt is now case-insensitive never mined tengu_prompt_suggestion_acceptedNo description from anybody. never mined tengu_prompt_suggestion_shownNo description from anybody. 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.