using-effectslisted

# Using Effects Effects are time-based animations on a layer's three slots — **in** (entrance), **out** (exit), **loop** (continuous). They coexist (fade in + gentle float + slide out). Every overlay kind (including a full-frame base video/image overlay), canvas scene, and audio clip can carry effects. ## Discover, never guess `libi.list_effects` is the AUTHORITATIVE, always-current catalog (including custom effects the user may have installed). Call it — optionally filtered by `kind`, `phase` — before applying. Treat any ids named in this skill as illustrative, not exhaustive. An unknown id passed to `apply_layer_effect` comes back with the valid set; correct and retry. ## Apply - `libi.apply_layer_effect({ pieceId, layerId, phase, effectId, durationMs?, params? })` — `layerId` is any overlay or audio clip id. - `libi.clear_layer_effect({ pieceId, layerId, phase })` — remove one slot. - New overlays — pass `effects` on `libi.add_overlay` so the layer is born with motion. - `libi.highlight_effect({ pieceId, target })` — when the user asks how to add an effect, or says one looks off, flash it (catalog or applied) so they see the control. ## Tasteful defaults (apply these out of the box) - **Caption / title text** — `fade` or `typewriter` in. Short (300-500ms). - **Logo / sticker / badge** — `pop` in. Playful but settles. - **Emphasis on a held element** — a subtle `pulse` or `breathe` loop (small amount). - **Photo / image overlay used as a full-frame base** — a gen