chore: import upstream snapshot with attribution

scripts/sync-trace-events-contract.ts

@@ -0,0 +1,125 @@
+import { mkdir, readFile, writeFile } from 'node:fs/promises'
+import { dirname, resolve } from 'node:path'
+import { fileURLToPath } from 'node:url'
+import { formatGeneratedSource } from './format-generated-source'
+
+/**
+ * Generate `apps/sim/lib/copilot/generated/trace-events-v1.ts` from
+ * the Go-side `contracts/trace-events-v1.schema.json` contract.
+ *
+ * Mirrors the span-names + attribute-keys sync scripts exactly — the
+ * only difference is the $defs key (`TraceEventsV1Name`), the output
+ * path, and the generated const name (`TraceEvent`). Keeping the
+ * scripts structurally identical means a reader who understands one
+ * understands all three, and drift between them gets caught
+ * immediately in code review.
+ */
+const SCRIPT_DIR = dirname(fileURLToPath(import.meta.url))
+const ROOT = resolve(SCRIPT_DIR, '..')
+const DEFAULT_CONTRACT_PATH = resolve(
+  ROOT,
+  '../copilot/copilot/contracts/trace-events-v1.schema.json'
+)
+const OUTPUT_PATH = resolve(ROOT, 'apps/sim/lib/copilot/generated/trace-events-v1.ts')
+
+function extractEventNames(schema: Record<string, unknown>): string[] {
+  const defs = (schema.$defs ?? {}) as Record<string, unknown>
+  const nameDef = defs.TraceEventsV1Name
+  if (
+    !nameDef ||
+    typeof nameDef !== 'object' ||
+    !Array.isArray((nameDef as Record<string, unknown>).enum)
+  ) {
+    throw new Error('trace-events-v1.schema.json is missing $defs.TraceEventsV1Name.enum')
+  }
+  const enumValues = (nameDef as Record<string, unknown>).enum as unknown[]
+  if (!enumValues.every((v) => typeof v === 'string')) {
+    throw new Error('TraceEventsV1Name enum must be string-only')
+  }
+  return (enumValues as string[]).slice().sort()
+}
+
+function toIdentifier(name: string): string {
+  const parts = name.split(/[^A-Za-z0-9]+/).filter(Boolean)
+  if (parts.length === 0) {
+    throw new Error(`Cannot derive identifier for event name: ${name}`)
+  }
+  const ident = parts.map((p) => p.charAt(0).toUpperCase() + p.slice(1).toLowerCase()).join('')
+  if (/^[0-9]/.test(ident)) {
+    throw new Error(`Derived identifier "${ident}" for event "${name}" starts with a digit`)
+  }
+  return ident
+}
+
+function render(eventNames: string[]): string {
+  const pairs = eventNames.map((name) => ({ name, ident: toIdentifier(name) }))
+
+  const seen = new Map<string, string>()
+  for (const p of pairs) {
+    const prev = seen.get(p.ident)
+    if (prev && prev !== p.name) {
+      throw new Error(`Identifier collision: "${prev}" and "${p.name}" both map to "${p.ident}"`)
+    }
+    seen.set(p.ident, p.name)
+  }
+
+  const constLines = pairs.map((p) => `  ${p.ident}: ${JSON.stringify(p.name)},`).join('\n')
+  const arrayEntries = eventNames.map((n) => `  ${JSON.stringify(n)},`).join('\n')
+
+  return `// AUTO-GENERATED FILE. DO NOT EDIT.
+//
+// Source: copilot/copilot/contracts/trace-events-v1.schema.json
+// Regenerate with: bun run trace-events-contract:generate
+//
+// Canonical mothership OTel span event names. Call sites should
+// reference \`TraceEvent.<Identifier>\` (e.g.
+// \`TraceEvent.RequestCancelled\`) rather than raw string literals,
+// so the Go-side contract is the single source of truth and typos
+// become compile errors.
+
+export const TraceEvent = {
+${constLines}
+} as const;
+
+export type TraceEventKey = keyof typeof TraceEvent;
+export type TraceEventValue = (typeof TraceEvent)[TraceEventKey];
+
+/** Readonly sorted list of every canonical event name. */
+export const TraceEventValues: readonly TraceEventValue[] = [
+${arrayEntries}
+] as const;
+`
+}
+
+async function main() {
+  const checkOnly = process.argv.includes('--check')
+  const inputArg = process.argv.find((a) => a.startsWith('--input='))
+  const inputPath = inputArg
+    ? resolve(ROOT, inputArg.slice('--input='.length))
+    : DEFAULT_CONTRACT_PATH
+
+  const raw = await readFile(inputPath, 'utf8')
+  const schema = JSON.parse(raw)
+  const eventNames = extractEventNames(schema)
+  const rendered = formatGeneratedSource(render(eventNames), OUTPUT_PATH, ROOT)
+
+  if (checkOnly) {
+    const existing = await readFile(OUTPUT_PATH, 'utf8').catch(() => null)
+    if (existing !== rendered) {
+      throw new Error(
+        'Generated trace events contract is stale. Run: bun run trace-events-contract:generate'
+      )
+    }
+    console.log('Trace events contract is up to date.')
+    return
+  }
+
+  await mkdir(dirname(OUTPUT_PATH), { recursive: true })
+  await writeFile(OUTPUT_PATH, rendered, 'utf8')
+  console.log(`Generated trace events types -> ${OUTPUT_PATH}`)
+}
+
+main().catch((err) => {
+  console.error(err)
+  process.exit(1)
+})