1  import assert from 'node:assert/strict'
 2  import fs from 'node:fs'
 3  import path from 'node:path'
 4  import { describe, it } from 'node:test'
 5  
 6  const repoRoot = path.resolve(path.dirname(new URL(import.meta.url).pathname), '../../../..')
 7  const srcRoot = path.join(repoRoot, 'src')
 8  
 9  const ALLOWED_IMPORTERS = new Set([
10    path.join(srcRoot, 'lib/server/chat-execution/chat-execution.ts'),
11    path.join(srcRoot, 'lib/server/execution-engine/chat-turn.ts'),
12  ])
13  
14  function walk(dir: string): string[] {
15    const results: string[] = []
16    for (const entry of fs.readdirSync(dir, { withFileTypes: true })) {
17      const fullPath = path.join(dir, entry.name)
18      if (entry.isDirectory()) {
19        results.push(...walk(fullPath))
20        continue
21      }
22      if (!/\.(?:ts|tsx|js|mjs)$/.test(entry.name)) continue
23      if (entry.name.includes('.test.')) continue
24      results.push(fullPath)
25    }
26    return results
27  }
28  
29  describe('executeSessionChatTurn import boundary', () => {
30    it('is only imported through the execution-engine chat-turn wrapper', () => {
31      const offenders: string[] = []
32      const importPattern = /import\s*\{[^}]*\bexecuteSessionChatTurn\b[^}]*\}\s*from\s*['"][^'"]+['"]/m
33  
34      for (const filePath of walk(srcRoot)) {
35        if (ALLOWED_IMPORTERS.has(filePath)) continue
36        const contents = fs.readFileSync(filePath, 'utf8')
37        if (importPattern.test(contents)) {
38          offenders.push(path.relative(repoRoot, filePath))
39        }
40      }
41  
42      assert.deepEqual(offenders, [])
43    })
44  })