chore: rename project to clawdbot

apps/shared/ClawdbotKit/Sources/ClawdbotKit/CanvasA2UIJSONL.swift

@@ -0,0 +1,81 @@
+import Foundation
+
+public enum ClawdbotCanvasA2UIJSONL: Sendable {
+    public struct ParsedItem: Sendable {
+        public var lineNumber: Int
+        public var message: AnyCodable
+
+        public init(lineNumber: Int, message: AnyCodable) {
+            self.lineNumber = lineNumber
+            self.message = message
+        }
+    }
+
+    public static func parse(_ text: String) throws -> [ParsedItem] {
+        var out: [ParsedItem] = []
+        var lineNumber = 0
+        for rawLine in text.split(omittingEmptySubsequences: false, whereSeparator: \.isNewline) {
+            lineNumber += 1
+            let line = String(rawLine).trimmingCharacters(in: .whitespacesAndNewlines)
+            if line.isEmpty { continue }
+            let data = Data(line.utf8)
+
+            let decoded = try JSONDecoder().decode(AnyCodable.self, from: data)
+            out.append(ParsedItem(lineNumber: lineNumber, message: decoded))
+        }
+        return out
+    }
+
+    public static func validateV0_8(_ items: [ParsedItem]) throws {
+        let allowed = Set([
+            "beginRendering",
+            "surfaceUpdate",
+            "dataModelUpdate",
+            "deleteSurface",
+        ])
+        for item in items {
+            guard let dict = item.message.value as? [String: AnyCodable] else {
+                throw NSError(domain: "A2UI", code: 1, userInfo: [
+                    NSLocalizedDescriptionKey: "A2UI JSONL line \(item.lineNumber): expected a JSON object",
+                ])
+            }
+
+            if dict.keys.contains("createSurface") {
+                throw NSError(domain: "A2UI", code: 2, userInfo: [
+                    NSLocalizedDescriptionKey: """
+                    A2UI JSONL line \(item.lineNumber): looks like A2UI v0.9 (`createSurface`).
+                    Canvas currently supports A2UI v0.8 server→client messages
+                    (`beginRendering`, `surfaceUpdate`, `dataModelUpdate`, `deleteSurface`).
+                    """,
+                ])
+            }
+
+            let matched = dict.keys.filter { allowed.contains($0) }
+            if matched.count != 1 {
+                let found = dict.keys.sorted().joined(separator: ", ")
+                throw NSError(domain: "A2UI", code: 3, userInfo: [
+                    NSLocalizedDescriptionKey: """
+                    A2UI JSONL line \(item.lineNumber): expected exactly one of \(allowed.sorted()
+                        .joined(separator: ", ")); found: \(found)
+                    """,
+                ])
+            }
+        }
+    }
+
+    public static func decodeMessagesFromJSONL(_ text: String) throws -> [AnyCodable] {
+        let items = try self.parse(text)
+        try self.validateV0_8(items)
+        return items.map(\.message)
+    }
+
+    public static func encodeMessagesJSONArray(_ messages: [AnyCodable]) throws -> String {
+        let data = try JSONEncoder().encode(messages)
+        guard let json = String(data: data, encoding: .utf8) else {
+            throw NSError(domain: "A2UI", code: 10, userInfo: [
+                NSLocalizedDescriptionKey: "Failed to encode messages payload as UTF-8",
+            ])
+        }
+        return json
+    }
+}