AV-Live

Use when the user asks to "add a SynthDef", "create a new instrument", "ajouter un instrument", or names a synthesis technique to package (FM, granular, Karplus-Strong, formant, etc.). Generates a SynthDef under `synth/<category>/` (drums, bass, lead, pad, world, master) for instruments, or `fx/<type>/` (bus, insert, trick) for effects. The auto-loaders `synth/_index.scd` and `fx/_index.scd` discover new files recursively. Follows the rigid sound_algo convention: standard arg signature (freq/gate/ADSR/amp/pan/scBus/scAmt), `EnvGen.kr(..., doneAction: 2)`, `Pan2.ar` final, `LeakDC.ar` after feedback, `clip` on freq, `tanh` saturation pattern. Forgetting `doneAction: 2` creates Synth zombies that accumulate in RAM until the server crashes.

Use when the user asks to "add a live wrapper", "expose dict X to live API", "ajouter une API live", or creates a new dict catalogue (`~newDict = ()`) that needs a live entry. Generates the dual API pattern used across the 5 sound_algo namespaces (`~kk`, `~mm`, `~ff`, `~cc`, `~p`): a dict for catalogue access AND env-direct wrappers for actual calls. Pseudo-method `~dict.key.(args)` is broken in SC (Event passes ~dict as 1st arg, real args lost — empirical bug on SC 3.14.1, see `live/melodies.scd`). Without env-direct wrappers, the live API is unusable.

Use when the user asks to "register a section", "add a jump target", "make section X jumpable", or after `scaffolding-track` finishes. Adds `~sections[\<LETTER>][\<slug>] = { ... }` to `control/jump.scd` so `~jumpTo.(\<LETTER>, \<slug>)` works during live play. The slug must match the timestamp log line in the track Routine. Without this skill, sections written in tracks are NOT jumpable from `01_live.scd` block [8].

Use when the user asks to "create a new track", "ajouter une track", "scaffolder une track X", or names a new track letter (A-W are taken, so X/Y/Z or beyond, OR overwriting an existing letter). Generates `tracks/<LETTER>_<slug>.scd` following the strict 23-track convention used in sound_algo: header banner, `~track !? { ~track.stop }` guard, `Routine` with timed sections, `~bpm`/`~kickFreq`/`~melodyInst`/`~melodyNotes` mutations, `TempoClock.default.tempo = ~bpm/60`, `~reload.value`, Pdef list `[\kickSeq, \hatSeq, \snareSeq, \clapSeq, \percSeq, \acidSeq, \melodySeq, \harmonySeq]`, section logs `[L M:SS] description`, and `.wait` between sections. Forgetting any of these breaks live performance — this skill enforces them.

Use when editing or creating any `.scd` file in the sound_algo project. Verifies that parentheses and square brackets are balanced (the project hard-requires P:0 B:0) and, for files loaded via `.load` (00_load.scd, live/_load.scd, palette/*/index.scd, engine.scd, palette/scales.scd), that there is exactly one top-level `(...)` block (TLB:1). The CLAUDE.md mandates this check after every modification — sclang gives parse errors at runtime that are far harder to diagnose than a quick awk balance.