diff --git a/.gitea/workflows/run-agent.yml b/.gitea/workflows/run-agent.yml
new file mode 100644
index 00000000..d14b98c2
--- /dev/null
+++ b/.gitea/workflows/run-agent.yml
@@ -0,0 +1,108 @@
+# 지정한 Agent YAML 을 AgentBackend API 로 실행하는 Gitea Actions 워크플로우.
+#
+# 사용법: Gitea 저장소 → Actions 탭 → "Run Agent YAML via API" → Run workflow
+#   yaml_path 에 repo 상대경로 입력, 예:
+#   Case_02_Comparison_Research/YAML_Prompts/1. Stage_1/v.5/Stage_1_Part_4.yml
+#
+# 요구사항:
+#   - 저장소 설정에서 Actions 활성화 + act_runner 등록 (runs-on: ubuntu-latest 라벨)
+#   - runner 에서 legalpoc.eroomai.com 접근 가능해야 함
+#
+# 실행 흐름 (SKILL.md §0.6 경로 A):
+#   upload-agent 등록 → SSE start → stage_complete 자동 confirm → execution_complete
+#   stage_error 발생 시 세션을 cancel 하고 실패 처리한다.
+#   전체 이벤트 로그 / final_output / summary 는 아티팩트로 저장된다.
+#
+# 실행 시간 상한 (주의):
+#   Gitea 의 [actions] ENDLESS_TASK_TIMEOUT 과 act_runner 의 runner.timeout 기본값이
+#   각각 3h 라서, timeout-minutes 를 아무리 크게 줘도 3h 에서 강제 종료된다.
+#   강제 종료되면 if: always() 아티팩트 업로드도 건너뛰므로,
+#   스크립트의 --max-runtime(기본 9000s=150m) 이 먼저 세션을 정리하고 종료하도록
+#   max_runtime < timeout-minutes(175m) < 3h 순서를 유지한다.
+#   3h 이상 돌려야 하면: app.ini 의 ENDLESS_TASK_TIMEOUT, act_runner config 의
+#   runner.timeout, 아래 timeout-minutes, max_runtime 입력을 모두 함께 올릴 것.
+
+name: Run Agent YAML via API
+
+on:
+  workflow_dispatch:
+    inputs:
+      yaml_path:
+        description: '실행할 Agent YAML 경로 (repo 상대경로)'
+        required: true
+        type: string
+      user_id:
+        description: 'AgentBackend user_id'
+        required: false
+        default: 'jsahn'
+        type: string
+      workspace_id:
+        description: 'AgentBackend workspace_id'
+        required: false
+        default: 'e1d0baed-cec9-44af-9989-b7aab09bcfd1'
+        type: string
+      user_input:
+        description: 'Agent 에 전달할 user_input'
+        required: false
+        default: ''
+        type: string
+      start_stage_index:
+        description: '시작 stage 인덱스 (0-based)'
+        required: false
+        default: '0'
+        type: string
+      api_base:
+        description: 'AgentBackend API base URL'
+        required: false
+        default: 'https://legalpoc.eroomai.com/api'
+        type: string
+      max_runtime_seconds:
+        description: '총 실행 시간 상한(초). Gitea/act_runner 3h 상한보다 짧게'
+        required: false
+        default: '9000'
+        type: string
+
+jobs:
+  run-agent:
+    runs-on: ubuntu-latest
+    timeout-minutes: 175
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.12'
+
+      - name: Install dependencies
+        run: python -m pip install --quiet httpx httpx-sse
+
+      - name: Run agent via API
+        env:
+          YAML_PATH: ${{ inputs.yaml_path }}
+          API_BASE: ${{ inputs.api_base }}
+          AGENT_USER_ID: ${{ inputs.user_id }}
+          AGENT_WORKSPACE_ID: ${{ inputs.workspace_id }}
+          AGENT_USER_INPUT: ${{ inputs.user_input }}
+          START_STAGE_INDEX: ${{ inputs.start_stage_index }}
+          MAX_RUNTIME_SECONDS: ${{ inputs.max_runtime_seconds }}
+        # '=' 형식 필수: user_input 이 '-' 로 시작하는 자유 텍스트여도 argparse 가 값으로 인식
+        run: |
+          python scripts/run_agent_api.py \
+            --yaml-path="$YAML_PATH" \
+            --api-base="$API_BASE" \
+            --user-id="$AGENT_USER_ID" \
+            --workspace-id="$AGENT_WORKSPACE_ID" \
+            --user-input="$AGENT_USER_INPUT" \
+            --start-stage-index="$START_STAGE_INDEX" \
+            --max-runtime="$MAX_RUNTIME_SECONDS" \
+            --output-dir=agent_run_output
+
+      - name: Upload run artifacts
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: agent-run-${{ github.run_number }}
+          path: agent_run_output/
+          if-no-files-found: warn
diff --git a/scripts/run_agent_api.py b/scripts/run_agent_api.py
new file mode 100644
index 00000000..670542ed
--- /dev/null
+++ b/scripts/run_agent_api.py
@@ -0,0 +1,403 @@
+#!/usr/bin/env python3
+"""
+Upload an Agent YAML to AgentBackend and execute it via SSE.
+
+Flow (SKILL.md §0.6 — 경로 A):
+  1. POST {api_base}/upload-agent?user_id=...        (multipart YAML 등록)
+  2. POST {api_base}/sse/agent/{name}/start           (SSE 실행)
+  3. stage_complete 이벤트 수신 시 자동 confirm       (CI 무인 실행, 재시도 포함)
+  4. 연결 끊김 시 /sse/agent/{name}/reconnect/{sid}   (재연결)
+  5. stage_error / --max-runtime 초과 / SIGTERM 시 세션 cancel 후 종료
+
+Exit code: 0 = execution_complete / 1 = 그 외 (stage_error, stopped, timeout, ...)
+
+--output-dir 에 저장되는 파일:
+  events.jsonl      — 수신한 모든 SSE 이벤트 (한 줄당 1개)
+  final_output.txt  — execution_complete 이벤트의 final_outputs (stage 별 출력 dict)
+  summary.md        — 실행 요약 (GITHUB_STEP_SUMMARY 에도 기록)
+"""
+
+from __future__ import annotations
+
+import argparse
+import json
+import os
+import signal
+import sys
+import time
+from datetime import datetime, timezone
+from pathlib import Path
+from urllib.parse import quote
+
+import httpx
+from httpx_sse import SSEError, connect_sse
+
+PRINT_TRUNCATE = 500
+
+
+class RunTimeout(Exception):
+    """--max-runtime 초과."""
+
+
+def _now() -> str:
+    return datetime.now(timezone.utc).strftime("%H:%M:%S")
+
+
+def log(msg: str) -> None:
+    print(f"[{_now()}] {msg}", flush=True)
+
+
+def truncate(value: object, limit: int = PRINT_TRUNCATE) -> str:
+    text = value if isinstance(value, str) else json.dumps(value, ensure_ascii=False)
+    return text if len(text) <= limit else text[:limit] + f"... (+{len(text) - limit} chars)"
+
+
+class AgentRunner:
+    def __init__(self, args: argparse.Namespace) -> None:
+        self.api_base = args.api_base.rstrip("/")
+        self.yaml_path = Path(args.yaml_path)
+        self.user_id = args.user_id
+        self.workspace_id = args.workspace_id
+        self.user_input = args.user_input
+        self.start_stage_index = args.start_stage_index
+        self.read_timeout = args.read_timeout
+        self.max_reconnects = args.max_reconnects
+        self.max_runtime = args.max_runtime
+        self.output_dir = Path(args.output_dir)
+        self.output_dir.mkdir(parents=True, exist_ok=True)
+
+        self.agent_name: str = ""
+        self.session_id: str = ""
+        self.final_status: str = "unknown"
+        self.final_error: str = ""
+        self.event_counts: dict[str, int] = {}
+        self.stages_confirmed = 0
+        self.started_at = time.monotonic()
+        self.deadline = self.started_at + self.max_runtime
+
+        self.sse_client = httpx.Client(timeout=httpx.Timeout(30.0))
+        # action/cancel 등 단발 요청은 SSE 스트림과 분리된 클라이언트로 보낸다
+        self.api_client = httpx.Client(timeout=60.0)
+
+        self.events_file = (self.output_dir / "events.jsonl").open("a", encoding="utf-8")
+
+    def _remaining(self) -> float:
+        return self.deadline - time.monotonic()
+
+    # ------------------------------------------------------------------ upload
+
+    def upload(self) -> None:
+        if not self.yaml_path.is_file():
+            raise SystemExit(f"ERROR: YAML not found: {self.yaml_path}")
+
+        log(f"Uploading agent YAML: {self.yaml_path}")
+        with self.yaml_path.open("rb") as f:
+            resp = self.api_client.post(
+                f"{self.api_base}/upload-agent",
+                params={"user_id": self.user_id},
+                files={"file": (self.yaml_path.name, f, "application/x-yaml")},
+            )
+        if resp.status_code != 200:
+            raise SystemExit(f"ERROR: upload-agent failed HTTP {resp.status_code}: {resp.text[:1000]}")
+
+        data = resp.json()
+        if not data.get("success") or not data.get("agent_name"):
+            raise SystemExit(f"ERROR: upload-agent rejected: {json.dumps(data, ensure_ascii=False)[:1000]}")
+
+        self.agent_name = data["agent_name"]
+        log(f"Agent registered: {self.agent_name} (stages={data.get('stages')})")
+
+    # ------------------------------------------------------------------ actions
+
+    def cancel_session(self) -> None:
+        if not (self.agent_name and self.session_id):
+            return
+        try:
+            self.api_client.post(
+                f"{self.api_base}/sse/agent/{quote(self.agent_name, safe='')}"
+                f"/cancel/{self.session_id}"
+            )
+            log(f"Cancel requested for session {self.session_id}")
+        except httpx.HTTPError as exc:
+            log(f"WARNING: cancel request failed: {exc}")
+
+    def _send_action(self, action: str, attempts: int = 5) -> bool:
+        """Send a stage action; retry transient failures inside the server's 600s wait window."""
+        url = (
+            f"{self.api_base}/sse/agent/{quote(self.agent_name, safe='')}"
+            f"/action/{self.session_id}"
+        )
+        for i in range(1, attempts + 1):
+            try:
+                resp = self.api_client.post(url, json={"action": action})
+                if resp.status_code == 200:
+                    log(f"  -> action '{action}' sent")
+                    return True
+                if resp.status_code in (400, 404):
+                    # 세션 소멸/거부 — 재시도 무의미
+                    log(f"  -> action '{action}' failed HTTP {resp.status_code}: {resp.text[:300]}")
+                    return False
+                log(f"  -> action '{action}' attempt {i}/{attempts} HTTP {resp.status_code}: {resp.text[:300]}")
+            except httpx.HTTPError as exc:
+                log(f"  -> action '{action}' attempt {i}/{attempts} request error: {exc}")
+            if i < attempts:
+                time.sleep(min(2 ** i, 60))
+        return False
+
+    # ------------------------------------------------------------------ events
+
+    def _record(self, event: dict) -> None:
+        event["_received_at"] = datetime.now(timezone.utc).isoformat()
+        self.events_file.write(json.dumps(event, ensure_ascii=False) + "\n")
+        self.events_file.flush()
+        etype = event.get("type", "unknown")
+        self.event_counts[etype] = self.event_counts.get(etype, 0) + 1
+
+    def _handle(self, event: dict) -> bool:
+        """Returns True when execution reached a terminal state."""
+        self._record(event)
+        etype = event.get("type", "unknown")
+
+        if etype == "session_started":
+            self.session_id = event.get("session_id", self.session_id)
+            log(
+                f"Session started: {self.session_id} "
+                f"(total_stages={event.get('total_stages')}, start_index={event.get('start_stage_index')})"
+            )
+        elif etype == "stage_start":
+            log(f"=== Stage start: index={event.get('stage_index')} {event.get('stage_name', '')}")
+        elif etype == "task_start":
+            log(f"  task start: {event.get('task_name', '?')}")
+        elif etype == "task_iteration":
+            log(f"  task iter : {event.get('task_name', '?')} #{event.get('iteration', '?')}")
+        elif etype == "task_complete":
+            log(f"  task done : {event.get('task_name', '?')}")
+        elif etype == "stage_complete":
+            log(f"=== Stage complete: index={event.get('stage_index')} — auto-confirming")
+            if self._send_action("confirm"):
+                self.stages_confirmed += 1
+            else:
+                # confirm 미전달 상태로 방치하면 서버 600s action-timeout 까지 세션이 잠긴다
+                self.final_status = "error"
+                self.final_error = "confirm action could not be delivered — cancelling session"
+                log(f"ERROR: {self.final_error}")
+                self.cancel_session()
+                return True
+        elif etype == "stage_error":
+            # 서버는 stage_error 후 클라이언트 개입 없이는 같은 stage 를 재실행하거나
+            # 실패 stage 를 건너뛰므로, CI 에서는 즉시 세션을 취소하고 실패 처리한다.
+            self.final_status = "stage_error"
+            self.final_error = str(event.get("error", ""))
+            log(f"=== Stage ERROR: index={event.get('stage_index')} — {truncate(self.final_error)}")
+            self.cancel_session()
+            return True
+        elif etype == "execution_complete":
+            self.final_status = "completed"
+            # 현행 백엔드는 final_outputs(stage 별 dict), 구버전 문서는 final_output
+            final_output = event.get("final_outputs") or event.get("final_output", "")
+            if not final_output:
+                log("WARNING: execution_complete has neither final_outputs nor final_output")
+            out_path = self.output_dir / "final_output.txt"
+            out_path.write_text(
+                final_output if isinstance(final_output, str)
+                else json.dumps(final_output, ensure_ascii=False, indent=2),
+                encoding="utf-8",
+            )
+            log(f"Execution complete. final_output saved to {out_path}")
+            return True
+        elif etype == "execution_stopped":
+            self.final_status = "stopped"
+            self.final_error = str(event.get("reason") or event.get("message") or "")
+            log(f"Execution STOPPED: {self.final_error}")
+            return True
+        elif etype == "error":
+            self.final_status = "error"
+            self.final_error = str(event.get("error", ""))
+            log(f"Execution ERROR: {truncate(self.final_error)}")
+            return True
+        else:
+            log(f"  event [{etype}]: {truncate({k: v for k, v in event.items() if k != 'type'})}")
+
+        return False
+
+    # ------------------------------------------------------------------ stream
+
+    def _stream(self, mode: str) -> bool:
+        """Open one SSE connection and consume events. Returns True on terminal event."""
+        remaining = self._remaining()
+        if remaining <= 0:
+            raise RunTimeout()
+
+        if mode == "start":
+            url = f"{self.api_base}/sse/agent/{quote(self.agent_name, safe='')}/start"
+            body = {
+                "user_id": self.user_id,
+                "workspace_id": self.workspace_id,
+                "user_input": self.user_input,
+                "start_stage_index": self.start_stage_index,
+            }
+        else:
+            url = (
+                f"{self.api_base}/sse/agent/{quote(self.agent_name, safe='')}"
+                f"/reconnect/{self.session_id}"
+            )
+            body = {}
+
+        # read timeout: 이벤트 간 무응답 상한이며 남은 실행 예산을 넘지 않게 잡는다
+        timeout = httpx.Timeout(
+            connect=30.0,
+            read=min(self.read_timeout, max(remaining, 30.0)),
+            write=30.0,
+            pool=30.0,
+        )
+
+        log(f"SSE {mode}: {url}")
+        with connect_sse(self.sse_client, "POST", url, json=body, timeout=timeout) as event_source:
+            for sse in event_source.iter_sse():
+                if self._remaining() <= 0:
+                    raise RunTimeout()
+                if not sse.data:
+                    continue
+                try:
+                    event = json.loads(sse.data)
+                except json.JSONDecodeError:
+                    log(f"  (unparseable SSE data) {truncate(sse.data)}")
+                    continue
+                if self._handle(event):
+                    return True
+        return False
+
+    def run(self) -> int:
+        try:
+            self.upload()
+
+            mode = "start"
+            reconnects = 0
+            while True:
+                try:
+                    if self._stream(mode):
+                        break
+                    # 스트림이 종료 이벤트 없이 닫힘 → 재연결 시도
+                    raise ConnectionError("SSE stream ended without a terminal event")
+                except RunTimeout:
+                    self.final_status = "timeout"
+                    self.final_error = (
+                        f"--max-runtime {int(self.max_runtime)}s exceeded — cancelling session"
+                    )
+                    log(f"ERROR: {self.final_error}")
+                    self.cancel_session()
+                    break
+                except SSEError as exc:
+                    # 서버가 SSE 가 아닌 응답을 반환 (404/500 등)
+                    self.final_status = "error"
+                    self.final_error = f"SSE handshake failed ({mode}): {exc}"
+                    log(f"ERROR: {self.final_error}")
+                    break
+                except (httpx.HTTPError, ConnectionError) as exc:
+                    if self.final_status != "unknown":
+                        break
+                    reconnects += 1
+                    if not self.session_id or reconnects > self.max_reconnects:
+                        self.final_status = "error"
+                        self.final_error = (
+                            f"connection lost ({exc}); reconnect attempts exhausted "
+                            f"({reconnects - 1}/{self.max_reconnects}). "
+                            f"과거 세션 조회: GET {self.api_base}/history/sessions"
+                            f"?user_id={self.user_id}&agent_name={self.agent_name}"
+                        )
+                        log(f"ERROR: {self.final_error}")
+                        self.cancel_session()
+                        break
+                    wait = min(10 * reconnects, 60)
+                    log(f"Connection lost ({exc}); reconnect {reconnects}/{self.max_reconnects} in {wait}s")
+                    time.sleep(wait)
+                    mode = "reconnect"
+        except KeyboardInterrupt:
+            # SIGINT / SIGTERM(핸들러가 KeyboardInterrupt 로 변환) — 세션 정리 후 종료
+            self.final_status = "interrupted"
+            self.final_error = "interrupted by SIGINT/SIGTERM — session cancelled"
+            log(self.final_error)
+            self.cancel_session()
+        except SystemExit as exc:
+            # upload() 의 ERROR 경로 — summary 에 남기고 실패 처리
+            self.final_status = "error"
+            self.final_error = str(exc)
+            log(self.final_error)
+        except Exception as exc:  # noqa: BLE001 — 어떤 실패든 summary 를 남긴다
+            self.final_status = "error"
+            self.final_error = f"unexpected {type(exc).__name__}: {exc}"
+            log(f"ERROR: {self.final_error}")
+        finally:
+            try:
+                self._write_summary()
+            except Exception as exc:  # noqa: BLE001
+                log(f"WARNING: summary write failed: {exc}")
+            self.events_file.close()
+
+        return 0 if self.final_status == "completed" else 1
+
+    # ------------------------------------------------------------------ report
+
+    def _write_summary(self) -> None:
+        elapsed = int(time.monotonic() - self.started_at)
+        status_icon = "✅" if self.final_status == "completed" else "❌"
+        lines = [
+            "# Agent Run Summary",
+            "",
+            "| 항목 | 값 |",
+            "|------|-----|",
+            f"| Agent | `{self.agent_name or '-'}` |",
+            f"| YAML | `{self.yaml_path}` |",
+            f"| Session | `{self.session_id or '-'}` |",
+            f"| user_id / workspace_id | `{self.user_id}` / `{self.workspace_id}` |",
+            f"| 최종 상태 | {status_icon} `{self.final_status}` |",
+            f"| 소요 시간 | {elapsed // 60}m {elapsed % 60}s (상한 {int(self.max_runtime) // 60}m) |",
+            f"| 확인(confirm)한 stage 수 | {self.stages_confirmed} |",
+        ]
+        if self.final_error:
+            lines += ["", f"**오류/중단 사유:** {self.final_error}"]
+        lines += ["", "## 이벤트 수신 통계", "", "| type | count |", "|------|-------|"]
+        for etype, count in sorted(self.event_counts.items()):
+            lines.append(f"| {etype} | {count} |")
+        summary = "\n".join(lines) + "\n"
+
+        (self.output_dir / "summary.md").write_text(summary, encoding="utf-8")
+        step_summary = os.environ.get("GITHUB_STEP_SUMMARY")
+        if step_summary:
+            with open(step_summary, "a", encoding="utf-8") as f:
+                f.write(summary)
+        log(f"Summary written ({self.final_status}, {elapsed}s)")
+
+
+def parse_args() -> argparse.Namespace:
+    p = argparse.ArgumentParser(description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter)
+    p.add_argument("--yaml-path", required=True, help="실행할 Agent YAML 경로 (repo 상대/절대)")
+    p.add_argument("--api-base", default="https://legalpoc.eroomai.com/api")
+    p.add_argument("--user-id", default="jsahn")
+    p.add_argument("--workspace-id", default="e1d0baed-cec9-44af-9989-b7aab09bcfd1")
+    p.add_argument("--user-input", default="")
+    p.add_argument("--start-stage-index", type=int, default=0)
+    p.add_argument("--output-dir", default="agent_run_output")
+    p.add_argument("--read-timeout", type=float, default=1800.0,
+                   help="SSE 이벤트 간 최대 대기 초 (초과 시 재연결)")
+    p.add_argument("--max-reconnects", type=int, default=5)
+    p.add_argument("--max-runtime", type=float, default=9000.0,
+                   help="총 실행 시간 상한 초. 초과 시 세션 cancel 후 exit 1. "
+                        "Gitea/act_runner 의 3h 태스크 상한 및 job timeout-minutes 보다 짧게 잡을 것")
+    return p.parse_args()
+
+
+def _raise_interrupt(signum, frame):  # noqa: ARG001
+    raise KeyboardInterrupt
+
+
+def main() -> None:
+    args = parse_args()
+    # job timeout/취소 시 SIGTERM 이 오므로 KeyboardInterrupt 경로로 합류시켜 세션을 정리한다
+    signal.signal(signal.SIGTERM, _raise_interrupt)
+    runner = AgentRunner(args)
+    sys.exit(runner.run())
+
+
+if __name__ == "__main__":
+    main()