Echo is a WARP optic runtime for witnessed causal history, Continuum-compatible suffixes, bounded observation, and holographic readings.

Protocol suite for apps, runtimes, agents, and tools to exchange witnessed causal history instead of shared state.

A FUSE-backed POSIX membrane over witnessed causal history. Mount causal runtimes as files, keep normal tools, and make every write declare its basis.

Observer Geometry II: Distributed observer fields over shared causal history. Formalizes suffix transport, certified transport grids, and the geometric gap between state convergence and intent preservation.