FLX-4102: skill binding is not permitted by the document's agentPolicy

Family: governance/sovereignty (the 4000 band)

A skill's declared model is not a member of agentPolicy.allowedModels, or its declared tokenBudget exceeds agentPolicy.tokenBudget (schema $defs/skillBinding: both are validator-enforced). This mirrors the FLUX offline validator's cross-document check and runs at plan time, before any call the binding would authorize is ever made.

Look it up offline

$ fluxsim explain FLX-4102

Every code is listed in the error index.