sync CLI templates with demo configs via manifest + CI flow (#764)

* feat: add template synchronization utility and CI integration

* refactor: make simple write to CI, no check

* ci: conditionally sync CLI templates on push to main branch

* docs: fix small capitalization

cli/planoai/template_sync.py

@@ -0,0 +1,122 @@
+from __future__ import annotations
+
+import argparse
+from dataclasses import dataclass
+from pathlib import Path
+
+import yaml
+
+from planoai.init_cmd import BUILTIN_TEMPLATES
+
+
+@dataclass(frozen=True)
+class SyncEntry:
+    template_id: str
+    template_file: str
+    demo_configs: tuple[str, ...]
+    transform: str = "none"
+
+
+REPO_ROOT = Path(__file__).resolve().parents[2]
+TEMPLATES_DIR = REPO_ROOT / "cli" / "planoai" / "templates"
+SYNC_MAP_PATH = TEMPLATES_DIR / "template_sync_map.yaml"
+
+
+def _load_sync_entries() -> list[SyncEntry]:
+    payload = yaml.safe_load(SYNC_MAP_PATH.read_text(encoding="utf-8")) or {}
+    rows = payload.get("templates", [])
+    entries: list[SyncEntry] = []
+    for row in rows:
+        entries.append(
+            SyncEntry(
+                template_id=row["template_id"],
+                template_file=row["template_file"],
+                demo_configs=tuple(row.get("demo_configs", [])),
+                transform=row.get("transform", "none"),
+            )
+        )
+    return entries
+
+
+def _render_for_demo(template_text: str, transform: str) -> str:
+    if transform == "none":
+        rendered = template_text
+    else:
+        raise ValueError(f"Unknown transform profile: {transform}")
+
+    return rendered if rendered.endswith("\n") else f"{rendered}\n"
+
+
+def _validate_manifest(entries: list[SyncEntry]) -> list[str]:
+    errors: list[str] = []
+    builtin_ids = {t.id for t in BUILTIN_TEMPLATES}
+    manifest_ids = {entry.template_id for entry in entries}
+
+    missing = sorted(builtin_ids - manifest_ids)
+    extra = sorted(manifest_ids - builtin_ids)
+    if missing:
+        errors.append(f"Missing template IDs in sync map: {', '.join(missing)}")
+    if extra:
+        errors.append(f"Unknown template IDs in sync map: {', '.join(extra)}")
+
+    for entry in entries:
+        template_path = TEMPLATES_DIR / entry.template_file
+        if not template_path.exists():
+            errors.append(
+                f"template_file does not exist for '{entry.template_id}': {template_path}"
+            )
+        for demo_rel_path in entry.demo_configs:
+            demo_path = REPO_ROOT / demo_rel_path
+            if not demo_path.exists():
+                errors.append(
+                    f"demo config does not exist for '{entry.template_id}': {demo_path}"
+                )
+
+    return errors
+
+
+def write_mapped_demo_configs(*, verbose: bool = False) -> int:
+    entries = _load_sync_entries()
+    manifest_errors = _validate_manifest(entries)
+    if manifest_errors:
+        for error in manifest_errors:
+            print(f"[manifest] {error}")
+        return 2
+
+    write_count = 0
+    for entry in entries:
+        template_text = (TEMPLATES_DIR / entry.template_file).read_text(
+            encoding="utf-8"
+        )
+        expected_text = _render_for_demo(template_text, entry.transform)
+
+        for demo_rel_path in entry.demo_configs:
+            demo_path = REPO_ROOT / demo_rel_path
+            # Keep this as a write-only sync step so CI behavior is deterministic.
+            demo_path.write_text(expected_text, encoding="utf-8")
+            write_count += 1
+            if verbose:
+                print(
+                    f"[wrote] {demo_rel_path} <- {entry.template_id} ({entry.template_file})"
+                )
+
+    print(f"Wrote {write_count} mapped demo config(s) from CLI templates.")
+    return 0
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(
+        description="Sync CLI templates to mapped demo config.yaml files (write-only)."
+    )
+    parser.add_argument(
+        "--verbose",
+        action="store_true",
+        help="Print each file written during sync.",
+    )
+    args = parser.parse_args()
+
+    return write_mapped_demo_configs(verbose=bool(args.verbose))
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())