feature-flags

# Feature Flags Feature flags gate experimental functionality behind user-configurable settings, enabling safe rollout (default off), user opt-in, and easy rollback. ## Checking Feature State ```go import "github.com/marcus/sidecar/internal/features" if features.IsEnabled("tmux_interactive_input") { // Feature-gated code } ``` ## Adding a New Feature Flag 1. Define the feature in `internal/features/features.go`: ```go var MyNewFeature = Feature{ Name: "my_new_feature", Default: false, Description: "Description of what this enables", } ``` 2. Add to the `allFeatures` slice: ```go var allFeatures = []Feature{ TmuxInteractiveInput, MyNewFeature, // Add here } ``` 3. Use the feature check in your code: ```go if features.IsEnabled("my_new_feature") { // New functionality } ``` That is all a flag needs to be reachable. Configuration → System → **Feature Flags** derives its list from `features.ListAll()`, so registering a feature puts a working switch on the page with the registry's own `Name` as the label and `Description` as the help text. There is no second list to remember. ## Giving a flag better copy (optional) `previewCopy` in `internal/configui/page_flags.go` overrides the registry's wording per flag. Only fill in what you want to change: ```go features.MyNewFeature.Name: { label: "Human-readable name", help: "One sentence on what turning this on does.", restart: true, // only if a consumer reads it once ...