shaders toolset

Since next

4 tools, about 499 tokens when enabled.

Enabled with the tools.enable tool, or argus-agent --toolsets shaders. Calling any of its tools also turns it on.

Tool	Tokens	Description
`shader.library`	88	What a shader may use: models, functions (the prelude), glsl (a cheat sheet), examples (six shaders).
`shader.measure`	113	Static cost, caps met (desktop, web, hd: uncalibrated), derived metadata (usesDerivatives, usesScreenInputs), what HD would downgrade, hd (passes, pipelines, ray-hit handling, codes), variants, pre-warm estimate.
`shader.preview`	150	Material contact sheet PNG: 4 angles x 3 times x day/backlit/night.
`shader.write`	148	[editor or disk] Check a *.shader.wgsl, then save it: errors come back as {code, line, col, message, hint}, nothing written.