{"name":"tengu_copper_fox","slug":"tengu-copper-fox","family":"flag","title":"Feature flags","noun":"feature flag","description":"Forked subagents are on by default in interactive sessions; set `CLAUDE_CODE_FORK_SUBAGENT` to false to opt out.","description_source":"entry","described_by":{"version":"2.1.232","anchor":"forked-subagents-are-on-by-default"},"presence":{"first_seen":"2.1.138","removed_in":"2.1.232","in_current_build":false,"newest_mined":"2.1.308","builds":83,"mined_builds":149,"first_cited":{"version":"2.1.117","released_at":"2026-04-21 21:54:08","spans":1}},"aliases":[],"entries":[{"version":"2.1.232","anchor":"forked-subagents-are-on-by-default","heading":"Forked subagents are on by default","line":"Forked subagents are on by default in interactive sessions; set `CLAUDE_CODE_FORK_SUBAGENT` to false to opt out.","released_at":"2026-08-13 21:30:53","reason":"gate cited by this entry, found in this entry's text"},{"version":"2.1.213","anchor":"sessionstart-hook-fork-source-value","heading":"SessionStart Hook: fork Source Value","line":null,"released_at":"2026-07-17 22:26:26","reason":"gate cited by this entry, found in this entry's text"},{"version":"2.1.117","anchor":"fork-command","heading":"\/fork Command","line":null,"released_at":"2026-04-21 21:54:08","reason":"gate cited by this entry, found in this entry's text"},{"version":"2.1.117","anchor":"fork-subagent-feature-gate-gradual-rollout","heading":"Fork Subagent Feature Gate [Gradual Rollout]","line":null,"released_at":"2026-04-21 21:54:08","reason":"gate cited by this entry, found in this entry's text"}],"entries_total":4,"docs":[],"docs_total":0,"gates":[{"version":"2.1.232","state":"off","account":false,"baseline":false,"code_default":null},{"version":"2.1.213","state":"off","account":false,"baseline":false,"code_default":null},{"version":"2.1.117","state":"off","account":false,"baseline":false,"code_default":null}],"related":[{"name":"tengu_copper_gazette","slug":"tengu-copper-gazette","description":null},{"name":"tengu_copper_heron","slug":"tengu-copper-heron","description":"Behind a remote switch, skills named `claude-ai:` or `anthropic-skills:` must really come from the matching source to be used"},{"name":"tengu_copper_hinge_wren","slug":"tengu-copper-hinge-wren","description":"Live document reads gain new fields for tracking update sequence and a gated deadline option"},{"name":"tengu_copper_kestrel","slug":"tengu-copper-kestrel","description":"Default `true`. Gates effort changes over Remote Control: when on, a connected client can set `effortLevel` through `apply_flag_settings` and the session reports its effort to the bridge as `effort_level` metadata. When off, such a request fails with `effort changes over Remote Control are turned off`."},{"name":"tengu_copper_kite","slug":"tengu-copper-kite","description":"With no API key, Claude Code can now fall back to a bearer token from the environment when fetching policy limits and remote settings"},{"name":"tengu_copper_lantern","slug":"tengu-copper-lantern","description":"Default `false`. A recall switch for the Claude Code background daemon when it runs as an installed service: the supervisor checks it on each poll, and when it is on it logs `service recall flag set`, stops its workers, shuts down with cause `service_recall` and uninstalls the service. A daemon started as a transient process ignores it."},{"name":"tengu_copper_thistle","slug":"tengu-copper-thistle","description":"The status line always calls MCP background work a \"task\" instead of sometimes saying \"job\"."}],"url":"https:\/\/changelogs.core-directive.com\/reference\/flag\/tengu-copper-fox","family_url":"https:\/\/changelogs.core-directive.com\/reference\/flag.json"}