The Cedar compiler compiles policies while checking that referenced attributes, actions, and entity types conform to the Cedar schema. This provides type safety, consistent policy vocabulary, and validation for development workflows. section 9.2
For deeper analysis, the Cedar Symbolic Compiler translates policies into formulas representing possible principals, actions, resources, context values, and entity relationships. SMT solvers can then find inconsistencies, logical errors, or counterexamples. section 7.4.6
Catching an invalid policy reference
If a policy references an attribute, action, or entity type absent from the schema, compilation fails before deployment. Analysis can also test whether an unmanaged device could reach a deployment action or whether a refactoring changes permissions. section 9.2 section 7.4.6
Table 7.2 Why Cedar’s design matters: A comparison of core design goals and their practical benefits to policy development
| Benefit |
Effect on policy development |
|---|---|
| Predictability |
Pure, deterministic logic ensures the same inputs always produce the same decision. |
| Trustworthiness |
Explicit deny-overrides and no hidden side effects build confidence in policy outcomes. |
| Auditability |
Static checks and proof tools allow errors to be caught before deployment. |
| Scalability |
Policies remain fast and verifiable, even at enterprise scale. |
Use the comparison to connect compilation and static analysis with Cedar’s broader goals of predictability, trustworthiness, auditability, and scalability. section 7.4.6
