# ifc-validate type_check plan
Status: planned under `VAL-TYPE`. Last updated: 2026-08-19.
Follow `AGENTS.md`; claim one task and record blockers/decisions beneath it.
## Work queue
- [ ] `VTYPE-ENTITY` - entity/subtype references
- Proof: unit/property/adversarial tests plus crate clippy.
- [ ] `VTYPE-SELECT` - select membership
- Proof: unit/property/adversarial tests plus crate clippy.
- [ ] `VTYPE-DEF` - defined type chains
- Proof: unit/property/adversarial tests plus crate clippy.
- [ ] `VTYPE-ENUM` - enum/logical forms
- Proof: unit/property/adversarial tests plus crate clippy.
- [ ] `VTYPE-SCALAR` - integer/real/string/binary forms
- Proof: unit/property/adversarial tests plus crate clippy.
## Completion log
Append `TASK-ID - proof - material decision`; no long logs.