Spatial audio research for virtual and augmented reality, teleconferencing and hearing devices often represents sound fields in the Spherical Harmonics (SH) domain, known as Ambisonics. A typical study simulates a room, renders what a listener or a microphone array would capture in it, and processes those signals in the SH domain. We present SHroom (Spherical Harmonics ROOM), an open-source Python library that performs this whole workflow in one package, from room simulation to binaural rendering, head rotation, microphone-array simulation and Ambisonics encoding. Existing tools cover either the room simulation or the downstream processing, so researchers bridge them with ad-hoc code that is hard to reproduce and compare. In SHroom, every step operates on one shared signal type through one processing interface, so a simulated room flows through the complete chain without format conversions. Built on the image-source engine of `pyroomacoustics`, SHroom reproduces the Ambisonic Room Impulse Response (ARIR) of its spherical-harmonic receivers while computing it about 3x faster for SH orders 4 to 12. SHroom is available at 'https://github.com/Yhonatangayer/shroom' and installable via `pip install pyshroom`.

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