A Structural Grammar Decipherment of the Indus Script

This whitepaper presents the Harappan Decipherment Toolkit (HDT) created by Gautam Raj Anand, a computationally grounded, rule-based system that achieves 100% grammatical parsing of over 300 Indus script inscriptions without relying on linguistic assumptions. HDT provides the first reproducible structural model of the script with symbol roles, production rules, parse trees, and semantic clustering — establishing a formal grammatical backbone for the oldest undeciphered writing system in the world.