What it is
New tengu_bridge_child_tool_diff setting controls whether child-session file edits are shown as diffs to a parent session
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.269.
Presence across releases
1Build by build
10One row per release since the first build this name was read out of. Absent means the build was read and the name was not in it, never mined means no bundle for that release was ever archived, and a declared type or a default is only ever what that release's own bundle stated.
First cited
2The earliest release whose published evidence quoted tengu_bridge_child_tool_diff was v2.1.269, 11 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.
Gate readings
2| Release | Resolved | This account | Anonymous | Compiled default |
|---|---|---|---|---|
| v2.1.273 read on another version | Not enough to say | no value returned | no value returned | on |
| v2.1.269 | Not enough to say | no value returned | no value returned | off |
Two arms, because they disagree: this account is the one account this site reads and anonymous is a baseline with no identity attached. A reading says nothing about your account, and off cannot rule out a rollout both readings sit outside of. What these readings can and cannot show.
Names beside it
Every feature flag in the inventory starting tengu_bridge_child, up to twelve of them.
tengu_bridge_child_auto_modeNew unreleased scaffolding tags some spawned bridge sessions as 'rc-child' behind a feature gate, but the other triggers are hardcoded off v2.1.269
tengu_bridge_child_auto_over_settingsBridge-spawned child sessions may be defaulted to auto permission mode, gated off v2.1.271
tengu_bridge_child_file_uploadSendUserFile can now deliver files into a project's shared Library folder for bridge child sessions v2.1.274
tengu_bridge_child_machine_settingsRemote Control child sessions gain two new optional capabilities: artifact behavior and inherited machine settings v2.1.273
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.