<p>Controlling the spin degree of freedom of light at the microscale is crucial for advancing photonic information processing. Spin-polarized light propagation, combined with strong optical nonlinearities, unlocks new functionalities in compact photonic circuits and active spin-optronic devices. Lead halide perovskite exciton-polaritons uniquely combine room-temperature operation, pronounced nonlinearities, and versatile microstructuring, making them a powerful platform for spin-based photonic technologies. Here, we demonstrate polarized edge emission from polariton condensates in perovskite single crystals predesigned into a microwire, forming natural, DBR-free cavity. Above threshold, we observe a distinct waveguiding optical spin Hall effect pattern in both real- and reciprocal-space emission, accompanied by pseudospin phase-locking arising from coherence between opposite edges. Beyond static polarization textures, we achieve spin-resolved polariton edge lasing with chirality exceeding 80% and spin-polarized signal propagation over tens of micrometers. These results establish CsPbBr₃ waveguides as a promising easy-to-fabricate platform for on-chip spin-coded information transport and nonlinear spin-optoelectronics.</p>