process: add newline-safe tea comment helper and governance guard (#372)

docs/commands.md

@@ -38,6 +38,27 @@ python3 scripts/validate_docs_sync.py
 
 ### tea CLI (Gitea Command Line Tool)
 
+#### ❌ Comment Newline Escaping (`\n` rendered literally)
+```bash
+YES="" ~/bin/tea comment 374 "line1\nline2"
+# Web UI shows "\n" as text instead of line breaks
+```
+**💡 Reason:** Inline string escaping is interpreted literally before comment submission.
+
+**✅ Solution:** Use file-based helper to preserve multiline text
+```bash
+cat > /tmp/comment.md <<'EOF'
+line1
+line2
+EOF
+
+scripts/tea_comment.sh 374 /tmp/comment.md
+```
+
+**📝 Notes:**
+- `scripts/tea_comment.sh` accepts stdin with `-` as body source.
+- The helper fails fast when body looks like escaped-newline text only.
+
 #### ❌ TTY Error - Interactive Confirmation Fails
 ```bash
 ~/bin/tea issues create --repo X --title "Y" --description "Z"

docs/workflow.md

@@ -70,6 +70,22 @@ Gitea 이슈/PR/코멘트 작업 전에 모든 에이전트는 아래를 먼저
 
 Issue/PR 본문 작성 시 줄바꿈(`\n`)이 문자열 그대로 저장되는 문제가 반복될 수 있다. 원인은 `-d "...\n..."` 형태에서 쉘/CLI가 이스케이프를 실제 개행으로 해석하지 않기 때문이다.
 
+코멘트도 동일한 문제가 자주 발생하므로, 코멘트는 파일 기반 래퍼를 표준으로 사용한다.
+
+```bash
+# 권장: 파일/STDIN 기반 코멘트 등록 (줄바꿈 보존)
+cat > /tmp/review.md <<'EOF'
+리뷰 반영 완료했습니다.
+
+- 항목 1
+- 항목 2
+EOF
+
+scripts/tea_comment.sh 374 /tmp/review.md
+# 또는
+cat /tmp/review.md | scripts/tea_comment.sh 374 -
+```
+
 권장 패턴:
 
 ```bash

scripts/tea_comment.sh

@@ -0,0 +1,49 @@
+#!/usr/bin/env bash
+# Safe helper for posting multiline Gitea comments without escaped-newline artifacts.
+
+set -euo pipefail
+
+if [ "${1:-}" = "-h" ] || [ "${1:-}" = "--help" ] || [ "$#" -lt 2 ]; then
+  cat <<'EOF'
+Usage:
+  scripts/tea_comment.sh <issue_or_pr_index> <body_file|-> [repo]
+
+Examples:
+  scripts/tea_comment.sh 374 /tmp/comment.md
+  cat /tmp/comment.md | scripts/tea_comment.sh 374 - jihoson/The-Ouroboros
+
+Notes:
+  - Use file/stdin input to preserve real newlines.
+  - Passing inline strings with "\n" is intentionally avoided by this helper.
+EOF
+  exit 1
+fi
+
+INDEX="$1"
+BODY_SOURCE="$2"
+REPO="${3:-jihoson/The-Ouroboros}"
+
+if [ "$BODY_SOURCE" = "-" ]; then
+  BODY="$(cat)"
+else
+  if [ ! -f "$BODY_SOURCE" ]; then
+    echo "[FAIL] body file not found: $BODY_SOURCE" >&2
+    exit 1
+  fi
+  BODY="$(cat "$BODY_SOURCE")"
+fi
+
+if [ -z "$BODY" ]; then
+  echo "[FAIL] empty comment body" >&2
+  exit 1
+fi
+
+# Guard against the common escaped-newline mistake.
+if [[ "$BODY" == *"\\n"* ]] && [[ "$BODY" != *$'\n'* ]]; then
+  echo "[FAIL] body appears to contain escaped newlines (\\n) instead of real line breaks" >&2
+  echo "Use a multiline file/heredoc and pass that file to scripts/tea_comment.sh" >&2
+  exit 1
+fi
+
+YES="" ~/bin/tea comment "$INDEX" --repo "$REPO" "$BODY"
+

scripts/validate_governance_assets.py

@@ -215,6 +215,7 @@ def main() -> int:
         [
             "Session Handover Gate (Mandatory)",
             "session_handover_check.py --strict",
+            "scripts/tea_comment.sh",
         ],
         errors,
     )
@@ -223,6 +224,8 @@ def main() -> int:
         [
             "Session Handover Preflight (Mandatory)",
             "session_handover_check.py --strict",
+            "Comment Newline Escaping",
+            "scripts/tea_comment.sh",
         ],
         errors,
     )