docs/commands.md

@@ -59,6 +59,18 @@ scripts/tea_comment.sh 374 /tmp/comment.md
 - `scripts/tea_comment.sh` accepts stdin with `-` as body source.
 - The helper fails fast when body looks like escaped-newline text only.
 
+#### PR Body Post-Check (Mandatory)
+
+PR 생성 직후 본문이 `\n` 문자열로 깨지지 않았는지 반드시 확인한다.
+
+```bash
+python3 scripts/validate_pr_body.py --pr <PR_NUMBER>
+```
+
+검증 실패 시:
+- PR 본문을 API patch 또는 파일 기반 본문으로 즉시 수정
+- 같은 명령으로 재검증 통과 후에만 리뷰/머지 진행
+
 #### ❌ TTY Error - Interactive Confirmation Fails
 ```bash
 ~/bin/tea issues create --repo X --title "Y" --description "Z"

docs/workflow.md

@@ -128,6 +128,16 @@ tea pr create \
   --description "$PR_BODY"
 ```
 
+PR 생성 직후 본문 무결성 검증(필수):
+
+```bash
+python3 scripts/validate_pr_body.py --pr <PR_NUMBER>
+```
+
+강제 규칙:
+- 검증 실패(`\n` 리터럴, 코드펜스 불균형, 헤더/리스트 누락) 상태에서는 리뷰/머지 금지
+- 본문 수정 후 같은 명령으로 재검증 통과 필요
+
 금지 패턴:
 
 - `-d "line1\nline2"` (웹 UI에 `\n` 문자 그대로 노출될 수 있음)

scripts/validate_docs_sync.py

@@ -92,6 +92,25 @@ def validate_testing_doc_has_dynamic_count_guidance(errors: list[str]) -> None:
         )
 
 
+def validate_pr_body_postcheck_guidance(errors: list[str]) -> None:
+    required_tokens = {
+        "commands": (
+            "PR Body Post-Check (Mandatory)",
+            "python3 scripts/validate_pr_body.py --pr <PR_NUMBER>",
+        ),
+        "workflow": (
+            "PR 생성 직후 본문 무결성 검증(필수)",
+            "python3 scripts/validate_pr_body.py --pr <PR_NUMBER>",
+        ),
+    }
+    for key, tokens in required_tokens.items():
+        path = REQUIRED_FILES[key]
+        text = _read(path)
+        for token in tokens:
+            if token not in text:
+                errors.append(f"{path}: missing PR body post-check guidance token -> {token}")
+
+
 def main() -> int:
     errors: list[str] = []
 
@@ -117,6 +136,7 @@ def main() -> int:
     validate_summary_docs_reference_core_docs(errors)
     validate_commands_endpoint_duplicates(errors)
     validate_testing_doc_has_dynamic_count_guidance(errors)
+    validate_pr_body_postcheck_guidance(errors)
 
     if errors:
         print("[FAIL] docs sync validation failed")
@@ -128,6 +148,7 @@ def main() -> int:
     print("[OK] summary docs link to core docs and links resolve")
     print("[OK] commands endpoint rows have no duplicates")
     print("[OK] testing doc includes dynamic count guidance")
+    print("[OK] PR body post-check guidance exists in commands/workflow docs")
     return 0
 
 

scripts/validate_pr_body.py

@@ -0,0 +1,117 @@
+#!/usr/bin/env python3
+"""Validate PR body formatting to prevent escaped-newline artifacts."""
+
+from __future__ import annotations
+
+import argparse
+import json
+import os
+import shutil
+import re
+import subprocess
+import sys
+from pathlib import Path
+
+HEADER_PATTERN = re.compile(r"^##\s+\S+", re.MULTILINE)
+LIST_ITEM_PATTERN = re.compile(r"^\s*(?:-|\*|\d+\.)\s+\S+", re.MULTILINE)
+FENCED_CODE_PATTERN = re.compile(r"```.*?```", re.DOTALL)
+INLINE_CODE_PATTERN = re.compile(r"`[^`]*`")
+
+
+def _strip_code_segments(text: str) -> str:
+    without_fences = FENCED_CODE_PATTERN.sub("", text)
+    return INLINE_CODE_PATTERN.sub("", without_fences)
+
+
+def resolve_tea_binary() -> str:
+    tea_from_path = shutil.which("tea")
+    if tea_from_path:
+        return tea_from_path
+
+    tea_home = Path.home() / "bin" / "tea"
+    if tea_home.exists() and tea_home.is_file() and os.access(tea_home, os.X_OK):
+        return str(tea_home)
+
+    raise RuntimeError("tea binary not found (checked PATH and ~/bin/tea)")
+
+
+def validate_pr_body_text(text: str) -> list[str]:
+    errors: list[str] = []
+    searchable = _strip_code_segments(text)
+    if "\\n" in searchable:
+        errors.append("body contains escaped newline sequence (\\n)")
+    if text.count("```") % 2 != 0:
+        errors.append("body has unbalanced fenced code blocks (``` count is odd)")
+    if not HEADER_PATTERN.search(text):
+        errors.append("body is missing markdown section headers (e.g. '## Summary')")
+    if not LIST_ITEM_PATTERN.search(text):
+        errors.append("body is missing markdown list items")
+    return errors
+
+
+def fetch_pr_body(pr_number: int) -> str:
+    tea_binary = resolve_tea_binary()
+    try:
+        completed = subprocess.run(
+            [
+                tea_binary,
+                "api",
+                "-R",
+                "origin",
+                f"repos/{{owner}}/{{repo}}/pulls/{pr_number}",
+            ],
+            check=True,
+            capture_output=True,
+            text=True,
+        )
+    except (subprocess.CalledProcessError, FileNotFoundError, PermissionError) as exc:
+        raise RuntimeError(f"failed to fetch PR #{pr_number}: {exc}") from exc
+
+    try:
+        payload = json.loads(completed.stdout)
+    except json.JSONDecodeError as exc:
+        raise RuntimeError(f"failed to parse PR payload for #{pr_number}: {exc}") from exc
+
+    body = payload.get("body", "")
+    if not isinstance(body, str):
+        raise RuntimeError(f"unexpected PR body type for #{pr_number}: {type(body).__name__}")
+    return body
+
+
+def parse_args() -> argparse.Namespace:
+    parser = argparse.ArgumentParser(
+        description="Validate PR body markdown formatting and escaped-newline artifacts."
+    )
+    group = parser.add_mutually_exclusive_group(required=True)
+    group.add_argument("--pr", type=int, help="PR number to fetch via `tea api`")
+    group.add_argument("--body-file", type=Path, help="Path to markdown body file")
+    return parser.parse_args()
+
+
+def main() -> int:
+    args = parse_args()
+    if args.body_file is not None:
+        if not args.body_file.exists():
+            print(f"[FAIL] body file not found: {args.body_file}")
+            return 1
+        body = args.body_file.read_text(encoding="utf-8")
+        source = f"file:{args.body_file}"
+    else:
+        body = fetch_pr_body(args.pr)
+        source = f"pr:{args.pr}"
+
+    errors = validate_pr_body_text(body)
+    if errors:
+        print("[FAIL] PR body validation failed")
+        print(f"- source: {source}")
+        for err in errors:
+            print(f"- {err}")
+        return 1
+
+    print("[OK] PR body validation passed")
+    print(f"- source: {source}")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())

tests/test_validate_docs_sync.py

@@ -121,3 +121,44 @@ def test_validate_testing_doc_has_dynamic_count_guidance(monkeypatch) -> None:
     monkeypatch.setattr(module, "_read", fake_read)
     module.validate_testing_doc_has_dynamic_count_guidance(errors)
     assert errors == []
+
+
+def test_validate_pr_body_postcheck_guidance_passes(monkeypatch) -> None:
+    module = _load_module()
+    errors: list[str] = []
+    fake_docs = {
+        str(module.REQUIRED_FILES["commands"]): (
+            "PR Body Post-Check (Mandatory)\n"
+            "python3 scripts/validate_pr_body.py --pr <PR_NUMBER>\n"
+        ),
+        str(module.REQUIRED_FILES["workflow"]): (
+            "PR 생성 직후 본문 무결성 검증(필수)\n"
+            "python3 scripts/validate_pr_body.py --pr <PR_NUMBER>\n"
+        ),
+    }
+
+    def fake_read(path: Path) -> str:
+        return fake_docs[str(path)]
+
+    monkeypatch.setattr(module, "_read", fake_read)
+    module.validate_pr_body_postcheck_guidance(errors)
+    assert errors == []
+
+
+def test_validate_pr_body_postcheck_guidance_reports_missing_tokens(
+    monkeypatch,
+) -> None:
+    module = _load_module()
+    errors: list[str] = []
+    fake_docs = {
+        str(module.REQUIRED_FILES["commands"]): "PR Body Post-Check (Mandatory)\n",
+        str(module.REQUIRED_FILES["workflow"]): "PR Body Post-Check\n",
+    }
+
+    def fake_read(path: Path) -> str:
+        return fake_docs[str(path)]
+
+    monkeypatch.setattr(module, "_read", fake_read)
+    module.validate_pr_body_postcheck_guidance(errors)
+    assert any("commands.md" in err for err in errors)
+    assert any("workflow.md" in err for err in errors)

tests/test_validate_pr_body.py

@@ -0,0 +1,126 @@
+from __future__ import annotations
+
+import importlib.util
+import json
+from pathlib import Path
+from types import SimpleNamespace
+
+import pytest
+
+
+def _load_module():
+    script_path = Path(__file__).resolve().parents[1] / "scripts" / "validate_pr_body.py"
+    spec = importlib.util.spec_from_file_location("validate_pr_body", script_path)
+    assert spec is not None
+    assert spec.loader is not None
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module
+
+
+def test_validate_pr_body_text_detects_escaped_newline() -> None:
+    module = _load_module()
+    errors = module.validate_pr_body_text("## Summary\\n- item")
+    assert any("escaped newline" in err for err in errors)
+
+
+def test_validate_pr_body_text_detects_escaped_newline_in_multiline_body() -> None:
+    module = _load_module()
+    text = "## Summary\n- first line\n- broken line with \\n literal"
+    errors = module.validate_pr_body_text(text)
+    assert any("escaped newline" in err for err in errors)
+
+
+def test_validate_pr_body_text_allows_escaped_newline_in_code_blocks() -> None:
+    module = _load_module()
+    text = "\n".join(
+        [
+            "## Summary",
+            "- example uses `\\n` for explanation",
+            "```bash",
+            "printf 'line1\\nline2\\n'",
+            "```",
+        ]
+    )
+    assert module.validate_pr_body_text(text) == []
+
+
+def test_validate_pr_body_text_detects_unbalanced_code_fence() -> None:
+    module = _load_module()
+    errors = module.validate_pr_body_text("## Summary\n- item\n```bash\necho hi\n")
+    assert any("unbalanced fenced code blocks" in err for err in errors)
+
+
+def test_validate_pr_body_text_detects_missing_structure() -> None:
+    module = _load_module()
+    errors = module.validate_pr_body_text("plain text only")
+    assert any("missing markdown section headers" in err for err in errors)
+    assert any("missing markdown list items" in err for err in errors)
+
+
+def test_validate_pr_body_text_passes_with_valid_markdown() -> None:
+    module = _load_module()
+    text = "\n".join(
+        [
+            "## Summary",
+            "- item",
+            "",
+            "## Validation",
+            "```bash",
+            "pytest -q",
+            "```",
+        ]
+    )
+    assert module.validate_pr_body_text(text) == []
+
+
+def test_fetch_pr_body_reads_body_from_tea_api(monkeypatch) -> None:
+    module = _load_module()
+
+    def fake_run(cmd, check, capture_output, text):  # noqa: ANN001
+        assert cmd[0] == "/tmp/tea-bin"
+        assert check is True
+        assert capture_output is True
+        assert text is True
+        return SimpleNamespace(stdout=json.dumps({"body": "## Summary\n- item"}))
+
+    monkeypatch.setattr(module, "resolve_tea_binary", lambda: "/tmp/tea-bin")
+    monkeypatch.setattr(module.subprocess, "run", fake_run)
+    assert module.fetch_pr_body(391) == "## Summary\n- item"
+
+
+def test_fetch_pr_body_rejects_non_string_body(monkeypatch) -> None:
+    module = _load_module()
+
+    def fake_run(cmd, check, capture_output, text):  # noqa: ANN001
+        return SimpleNamespace(stdout=json.dumps({"body": 123}))
+
+    monkeypatch.setattr(module, "resolve_tea_binary", lambda: "/tmp/tea-bin")
+    monkeypatch.setattr(module.subprocess, "run", fake_run)
+    with pytest.raises(RuntimeError):
+        module.fetch_pr_body(391)
+
+
+def test_resolve_tea_binary_falls_back_to_home_bin(monkeypatch, tmp_path) -> None:
+    module = _load_module()
+    tea_home = tmp_path / "bin" / "tea"
+    tea_home.parent.mkdir(parents=True)
+    tea_home.write_text("#!/usr/bin/env bash\n", encoding="utf-8")
+    tea_home.chmod(0o755)
+
+    monkeypatch.setattr(module.shutil, "which", lambda _: None)
+    monkeypatch.setattr(module.Path, "home", lambda: tmp_path)
+    assert module.resolve_tea_binary() == str(tea_home)
+
+
+def test_resolve_tea_binary_rejects_non_executable_home_bin(monkeypatch, tmp_path) -> None:
+    module = _load_module()
+    tea_home = tmp_path / "bin" / "tea"
+    tea_home.parent.mkdir(parents=True)
+    tea_home.write_text("not executable\n", encoding="utf-8")
+    tea_home.chmod(0o644)
+
+    monkeypatch.setattr(module.shutil, "which", lambda _: None)
+    monkeypatch.setattr(module.Path, "home", lambda: tmp_path)
+    with pytest.raises(RuntimeError):
+        module.resolve_tea_binary()