chore: agentic upgrade

.codex/hooks/snapshot_ts_changes.mjs

@@ -0,0 +1,55 @@
+import { mkdirSync, readFileSync, statSync, writeFileSync } from 'node:fs';
+import { dirname, join } from 'node:path';
+import { spawnSync } from 'node:child_process';
+import { createHash } from 'node:crypto';
+import { tmpdir } from 'node:os';
+
+const readInput = () => {
+  try {
+    const rawInput = readFileSync(0, 'utf8').trim();
+    return rawInput ? JSON.parse(rawInput) : {};
+  } catch {
+    return {};
+  }
+};
+
+const runGit = (args) => {
+  const result = spawnSync('git', args, { encoding: 'utf8' });
+  return result.status === 0 ? result.stdout.split('\n').filter(Boolean) : [];
+};
+
+const getStatePath = (input) => {
+  const turnId = String(input.turn_id ?? 'unknown').replace(/[^a-zA-Z0-9_.-]/g, '_');
+  const cwdHash = createHash('sha256').update(process.cwd()).digest('hex').slice(0, 16);
+  return join(tmpdir(), 'codex-fastboard-hooks', cwdHash, `${turnId}.json`);
+};
+
+const isTypeScriptSource = (file) => /^src\/.+\.tsx?$/.test(file);
+
+const getDirtyTypeScriptFiles = () => {
+  const files = [
+    ...runGit(['diff', '--name-only', '--diff-filter=ACMR']),
+    ...runGit(['diff', '--cached', '--name-only', '--diff-filter=ACMR']),
+    ...runGit(['ls-files', '--others', '--exclude-standard']),
+  ];
+
+  return [...new Set(files)].filter(isTypeScriptSource).sort();
+};
+
+const getFileState = (file) => {
+  try {
+    const stat = statSync(file);
+    return { mtimeMs: stat.mtimeMs, size: stat.size };
+  } catch {
+    return null;
+  }
+};
+
+const input = readInput();
+const statePath = getStatePath(input);
+const snapshot = Object.fromEntries(
+  getDirtyTypeScriptFiles().map((file) => [file, getFileState(file)]),
+);
+
+mkdirSync(dirname(statePath), { recursive: true });
+writeFileSync(statePath, JSON.stringify(snapshot, null, 2));