ngerakines

atproto-pds: Foundational Design Document for a Rust ATProtocol Personal Data Server

Author of design brief: Nick Gerakines (CTO, Graze Social; founder, Smoke Signal & Lexicon Garden; author, AIP OAuth server; AT Protocol Community Fund member). Target home: tangled.org/ngerakines.me/atproto-crates, as a new crate atproto-pds. Date: May 1, 2026 (revision 2). Architectural North Star: A low-latency, highly-performant Rust PDS that is fully conformant to the existing reference implementations and is architected from day zero to support permissioned data spaces as a first-class concern, grounded in the concrete design laid out in bluesky-social/atproto/docs/superpowers/specs/2026-04-22-permissioned-data-pds-design.md (Daniel Holmgren's PDS implementation design, hereafter "the Spaces Design Spec"). The Spaces Design Spec supersedes the earlier Permissioned Data Diary blog posts as the authoritative source for protocol mechanics; the diary is retained only as conceptual backgr

tomkrikorian

name	visionos-agent
description	Senior visionOS Engineer and Spatial Computing Expert for Apple Vision Pro development.

VISIONOS AGENT GUIDE

ROLE & PERSONA

You are a Senior visionOS Engineer and Spatial Computing Expert. You specialize in SwiftUI, RealityKit, and ARKit for Apple Vision Pro. Your code is optimized for the platform, adhering strictly to Apple's Human Interface Guidelines for spatial design.

Matt54

#ifndef MarchingCubesBlobParams_h
#define MarchingCubesBlobParams_h

#include <simd/simd.h>

typedef struct {
    simd_float3 center;
    float       radius;
} Sphere;

Matt54

import Foundation
import RealityKit
import SwiftUI

// See: https://developer.apple.com/documentation/realitykit/creating-a-plane-with-low-level-mesh
struct ApplePlaneExample: View {
    var body: some View {
        RealityView { content in
            // Create a plane mesh.
            if let planeMesh = try? PlaneMesh(size: [0.2, 0.2], dimensions: [16, 16]), let mesh = try? MeshResource(from: planeMesh.mesh) {

Matt54

import SwiftUI
import RealityKit

struct SphereMeshTextureComparisonView: View {
    let latitudeBands = 128
    let longitudeBands = 80
    let radius: Float = 0.1
    
    // Metal-related properties
    let device: MTLDevice

Matt54

import AVFoundation
import SwiftUI
import RealityKit

#Preview { LightBeamSynthView() }
struct LightBeamSynthView: View {
    @Environment(\.physicalMetrics) var physicalMetrics
    @State var outerCylinderEntity: Entity?
    @State var innerCylinderEntity: Entity?
    @State var touchEntity: Entity?

Matt54

import AVFoundation
import SwiftUI
import RealityKit

struct LaserSynthView: View {
    @Environment(\.physicalMetrics) var physicalMetrics
    let signalGenerator = SignalGenerator()
    
    @State var outerCylinderEntity: Entity?
    @State var innerCylinderEntity: Entity?

Matt54

import RealityKit
import SwiftUI

struct FireballCirclesAddBlendView: View {
    @State var rootEntity: Entity?
    @State var sphereTargets: [Entity: SIMD3<Float>] = [:]
    @State private var rotationAngles: SIMD3<Float> = [0, 0, 0]
    @State private var modulationTimer: Timer?
    @State private var lastRotationUpdateTime = CACurrentMediaTime()

Matt54

import SwiftUI
import RealityKit

struct LowLevelMeshNormalsComparisonView: View {
    var body: some View {
        RealityView { content in
            let sphereWithoutNormals = try! sphereEntity(includeNormals: false)
            sphereWithoutNormals.position.x = -0.11
            
            let sphereWithNormals = try! sphereEntity(includeNormals: true)

Matt54

import SwiftUI
import RealityKit
import Metal

struct MetalWavyPlaneView: View {
    @State private var phase: Float = 0.0
    @State private var mesh: LowLevelMesh?
    @State private var timer: Timer?
    let resolution = 250