Switch from FOUNDRY_FF_ENHANCED_UI to FOUNDRY_UI_HEADLESS_MODE - #5
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April 15, 2026 22:28
Per Josh Marlow (Foundry CLI team), FOUNDRY_FF_ENHANCED_UI is a temporary feature flag that will be removed. FOUNDRY_UI_HEADLESS_MODE=true is the correct long-term env var for disabling TUI features in headless/CI environments. Added a SessionStart hook (hooks/set-foundry-env.sh) that auto-injects FOUNDRY_UI_HEADLESS_MODE=true via CLAUDE_ENV_FILE at session start. Users no longer need to prefix deploy/release/list-deployments commands manually. The guard hook is kept as a fallback. 174 hook tests passing. A/B tested: 5/5 deployed.
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* Switch from FOUNDRY_FF_ENHANCED_UI to FOUNDRY_UI_HEADLESS_MODE Per Josh Marlow (Foundry CLI team), FOUNDRY_FF_ENHANCED_UI is a temporary feature flag that will be removed. FOUNDRY_UI_HEADLESS_MODE=true is the correct long-term env var for disabling TUI features in headless/CI environments. Updated hook, tests (171 passing), skills, use cases, and scripts. * Add SessionStart hook to auto-inject FOUNDRY_UI_HEADLESS_MODE The plugin now sets FOUNDRY_UI_HEADLESS_MODE=true automatically at session start via CLAUDE_ENV_FILE, so users never need to prefix deploy/release/list-deployments commands manually. - New hooks/set-foundry-env.sh (SessionStart hook) - Updated hooks.json with SessionStart entry - Removed FOUNDRY_UI_HEADLESS_MODE=true prefix from all docs/examples - Guard hook kept as fallback for edge cases - 174 hook tests passing (3 new for SessionStart) - A/B tested: 5/5 deployed
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Per Josh Marlow (Foundry CLI team), FOUNDRY_FF_ENHANCED_UI is a temporary feature flag that will be removed.
FOUNDRY_UI_HEADLESS_MODE=trueis the correct long-term env var for disabling TUI features in headless/CI environments.Added a SessionStart hook (
hooks/set-foundry-env.sh) that auto-injectsFOUNDRY_UI_HEADLESS_MODE=trueviaCLAUDE_ENV_FILEat session start. Users no longer need to prefix deploy/release/list-deployments commands manually. The guard hook is kept as a fallback.Updated hook logic, skills docs, use cases, and scripts. Removed all inline
FOUNDRY_UI_HEADLESS_MODE=trueprefixes from command examples.174 hook tests passing. A/B tested: 5/5 deployed, avg ~5.3M tokens/run.