process: harden implementation-start gate before coding

.gitea/PULL_REQUEST_TEMPLATE.md

@@ -35,6 +35,12 @@
 - [ ] `docs/commands.md`와 `docs/workflow.md` 트러블슈팅 선확인
 - [ ] `tea` 사용 (`gh` 미사용)
 
+## Session Handover Gate
+
+- [ ] `python3 scripts/session_handover_check.py --strict` 통과
+- [ ] `workflow/session-handover.md` 최신 엔트리가 현재 브랜치/당일(UTC) 기준으로 갱신됨
+- 최신 handover 엔트리 heading:
+
 ## Runtime Evidence
 
 - 시스템 실제 구동 커맨드:

.gitea/workflows/ci.yml

@@ -0,0 +1,38 @@
+name: Gitea CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+      - feature/**
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: Install dependencies
+        run: pip install ".[dev]"
+
+      - name: Session handover gate
+        run: python3 scripts/session_handover_check.py --strict
+
+      - name: Validate governance assets
+        run: python3 scripts/validate_governance_assets.py
+
+      - name: Validate Ouroboros docs
+        run: python3 scripts/validate_ouroboros_docs.py
+
+      - name: Lint
+        run: ruff check src/ tests/
+
+      - name: Run tests with coverage
+        run: pytest -v --cov=src --cov-report=term-missing --cov-fail-under=80

.github/workflows/ci.yml

@@ -21,6 +21,9 @@ jobs:
       - name: Install dependencies
         run: pip install ".[dev]"
 
+      - name: Session handover gate
+        run: python3 scripts/session_handover_check.py --strict
+
       - name: Validate governance assets
         run: python3 scripts/validate_governance_assets.py
 

docs/agent-constraints.md

@@ -32,6 +32,16 @@ It is distinct from `docs/requirements-log.md`, which records **project/product
      (or in a dedicated policy doc) and reference it when working.
    - Keep entries short and concrete, with dates.
 
+5. **Session start handover gate**
+   - Before implementation/verification work, run `python3 scripts/session_handover_check.py --strict`.
+   - Keep `workflow/session-handover.md` updated with a same-day entry for the active branch.
+   - If the check fails, stop and fix handover artifacts first.
+
+6. **Process-change-first execution gate**
+   - If process/governance change is required, merge the process ticket to the feature branch first.
+   - Do not start code/test edits for implementation tickets until process merge evidence is confirmed.
+   - Subagents must be constrained to read-only exploration until the process gate is satisfied.
+
 ## Change Control
 
 - Changes to this file follow the same workflow as code changes.
@@ -50,3 +60,10 @@ It is distinct from `docs/requirements-log.md`, which records **project/product
 
 - All agents must pre-read `docs/commands.md` and `docs/workflow.md` troubleshooting before running Gitea issue/PR/comment commands.
 - `gh` CLI is prohibited for repository ticket/PR operations; use `tea` (or documented Gitea API fallback only).
+- Session start must pass `python3 scripts/session_handover_check.py --strict`, with branch-matched entry in `workflow/session-handover.md`.
+
+### 2026-02-27
+
+- Apply process-change-first as an execution gate: process ticket must be merged before implementation ticket coding.
+- Handover entry must record concrete `next_ticket` and `process_gate_checked`; placeholders are not allowed in strict gate.
+- Before process merge confirmation, all subagent tasks must remain read-only (analysis only).

docs/commands.md

@@ -11,6 +11,16 @@
 - 기본 도구는 `tea`이며, `tea` 미지원 케이스만 Gitea API를 fallback으로 사용한다.
 - 실행 전 `docs/workflow.md`의 `Gitea CLI Formatting Troubleshooting`을 반드시 확인한다.
 
+## Session Handover Preflight (Mandatory)
+
+- 세션 시작 직후(코드 변경 전) 아래 명령을 먼저 실행한다.
+
+```bash
+python3 scripts/session_handover_check.py --strict
+```
+
+- 실패 시 `workflow/session-handover.md` 최신 엔트리를 보강한 뒤 재실행한다.
+
 ### tea CLI (Gitea Command Line Tool)
 
 #### ❌ TTY Error - Interactive Confirmation Fails
@@ -150,6 +160,9 @@ python -m src.main --mode=paper --dashboard
 # Runtime verification monitor (NOT_OBSERVED detection)
 bash scripts/runtime_verify_monitor.sh
 
+# Session handover gate (must pass before implementation)
+python3 scripts/session_handover_check.py --strict
+
 # Follow runtime verification log
 tail -f data/overnight/runtime_verify_*.log
 

docs/ouroboros/60_repo_enforcement_checklist.md

@@ -3,7 +3,7 @@ Doc-ID: DOC-OPS-002
 Version: 1.0.0
 Status: active
 Owner: tpm
-Updated: 2026-02-26
+Updated: 2026-02-27
 -->
 
 # 저장소 강제 설정 체크리스트
@@ -58,6 +58,7 @@ Updated: 2026-02-26
 자동 점검:
 - 문서 검증 스크립트 통과
 - 테스트 통과
+- `python3 scripts/session_handover_check.py --strict` 통과
 - 개발 완료 시 시스템 구동/모니터링 증적 코멘트 존재
 - 이슈/PR 조작 전에 `docs/commands.md` 및 `docs/workflow.md` 트러블슈팅 확인 코멘트 존재
 - `gh` CLI 미사용, `tea` 사용 증적 존재

docs/workflow.md

@@ -30,6 +30,19 @@ Gitea 이슈/PR/코멘트 작업 전에 모든 에이전트는 아래를 먼저
 - `tea` 실패 시 동일 명령 재시도 전에 원인/수정사항을 PR 코멘트에 남긴다.
 - 필요한 경우에만 Gitea API(`localhost:3000`)를 fallback으로 사용한다.
 
+## Session Handover Gate (Mandatory)
+
+새 세션에서 구현/검증을 시작하기 전에 아래를 선행해야 한다.
+
+1. `docs/workflow.md`, `docs/commands.md`, `docs/agent-constraints.md` 재확인
+2. `workflow/session-handover.md`에 최신 세션 엔트리 추가
+3. `python3 scripts/session_handover_check.py --strict` 통과 확인
+
+강제 규칙:
+- handover check 실패 상태에서 코드 수정/이슈 상태 전이/PR 생성 금지
+- 최신 handover 엔트리는 현재 작업 브랜치를 명시해야 한다
+- 최신 handover 엔트리는 당일(UTC) 날짜를 포함해야 한다
+
 ## Branch Strategy (Mandatory)
 
 - Team operation default branch is the **program feature branch**, not `main`.
@@ -175,6 +188,19 @@ Use `run_in_background=True` for independent tasks that don't block subsequent w
 - process ticket 미반영 상태에서 기능 티켓 코딩/머지 금지
 - 세션 전환 시에도 동일 규칙 유지
 
+### Implementation Start Gate (Mandatory)
+
+구현 티켓을 시작하기 전에 아래 3개를 모두 만족해야 한다.
+
+1. `process ticket merge` 증적 확인 (feature branch 반영 커밋/PR)
+2. `workflow/session-handover.md` 최신 엔트리에 `next_ticket`과 `process_gate_checked` 기록
+3. `python3 scripts/session_handover_check.py --strict` 통과
+
+강제 규칙:
+- 위 3개 중 하나라도 불충족이면 코드/테스트 수정 금지
+- 서브에이전트 지시도 동일하게 제한한다 (`process merged 확인 전 read-only 탐색만 허용`)
+- 성급 착수 발견 시 구현 작업을 즉시 중단하고 handover/proces gate부터 복구한다
+
 ### Ticket Maturity Stages (Mandatory)
 
 모든 티켓은 아래 4단계를 순서대로 통과해야 한다.

scripts/session_handover_check.py

@@ -0,0 +1,146 @@
+#!/usr/bin/env python3
+"""Session handover preflight gate.
+
+This script enforces a minimal handover record per working branch so that
+new sessions cannot start implementation without reading the required docs
+and recording current intent.
+"""
+
+from __future__ import annotations
+
+import argparse
+import subprocess
+import sys
+from datetime import UTC, datetime
+from pathlib import Path
+
+REQUIRED_DOCS = (
+    Path("docs/workflow.md"),
+    Path("docs/commands.md"),
+    Path("docs/agent-constraints.md"),
+)
+HANDOVER_LOG = Path("workflow/session-handover.md")
+
+
+def _run_git(*args: str) -> str:
+    try:
+        return (
+            subprocess.check_output(["git", *args], stderr=subprocess.DEVNULL)
+            .decode("utf-8")
+            .strip()
+        )
+    except Exception:
+        return ""
+
+
+def _current_branch() -> str:
+    branch = _run_git("branch", "--show-current")
+    if branch:
+        return branch
+    return _run_git("rev-parse", "--abbrev-ref", "HEAD")
+
+
+def _latest_entry(text: str) -> str:
+    chunks = text.split("\n### ")
+    if not chunks:
+        return ""
+    if chunks[0].startswith("### "):
+        chunks[0] = chunks[0][4:]
+    latest = chunks[-1].strip()
+    if not latest:
+        return ""
+    if not latest.startswith("### "):
+        latest = f"### {latest}"
+    return latest
+
+
+def _check_required_files(errors: list[str]) -> None:
+    for path in REQUIRED_DOCS:
+        if not path.exists():
+            errors.append(f"missing required document: {path}")
+    if not HANDOVER_LOG.exists():
+        errors.append(f"missing handover log: {HANDOVER_LOG}")
+
+
+def _check_handover_entry(
+    *,
+    branch: str,
+    strict: bool,
+    errors: list[str],
+) -> None:
+    if not HANDOVER_LOG.exists():
+        return
+    text = HANDOVER_LOG.read_text(encoding="utf-8")
+    latest = _latest_entry(text)
+    if not latest:
+        errors.append("handover log has no session entry")
+        return
+
+    required_tokens = (
+        "- branch:",
+        "- docs_checked:",
+        "- open_issues_reviewed:",
+        "- next_ticket:",
+        "- process_gate_checked:",
+    )
+    for token in required_tokens:
+        if token not in latest:
+            errors.append(f"latest handover entry missing token: {token}")
+
+    if strict:
+        today_utc = datetime.now(UTC).date().isoformat()
+        if today_utc not in latest:
+            errors.append(
+                f"latest handover entry must contain today's UTC date ({today_utc})"
+            )
+        branch_token = f"- branch: {branch}"
+        if branch_token not in latest:
+            errors.append(
+                "latest handover entry must target current branch "
+                f"({branch_token})"
+            )
+        if "- next_ticket: #TBD" in latest:
+            errors.append("latest handover entry must not use placeholder next_ticket (#TBD)")
+        if "merged_to_feature_branch=no" in latest:
+            errors.append(
+                "process gate indicates not merged; implementation must stay blocked "
+                "(merged_to_feature_branch=no)"
+            )
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(
+        description="Validate session handover gate requirements."
+    )
+    parser.add_argument(
+        "--strict",
+        action="store_true",
+        help="Enforce today-date and current-branch match on latest handover entry.",
+    )
+    args = parser.parse_args()
+
+    errors: list[str] = []
+    _check_required_files(errors)
+
+    branch = _current_branch()
+    if not branch:
+        errors.append("cannot resolve current git branch")
+    elif branch in {"main", "master"}:
+        errors.append(f"working branch must not be {branch}")
+
+    _check_handover_entry(branch=branch, strict=args.strict, errors=errors)
+
+    if errors:
+        print("[FAIL] session handover check failed")
+        for err in errors:
+            print(f"- {err}")
+        return 1
+
+    print("[OK] session handover check passed")
+    print(f"[OK] branch={branch}")
+    print(f"[OK] handover_log={HANDOVER_LOG}")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())

scripts/validate_governance_assets.py

@@ -22,6 +22,10 @@ def main() -> int:
 
     pr_template = Path(".gitea/PULL_REQUEST_TEMPLATE.md")
     issue_template = Path(".gitea/ISSUE_TEMPLATE/runtime_verification.md")
+    workflow_doc = Path("docs/workflow.md")
+    commands_doc = Path("docs/commands.md")
+    handover_script = Path("scripts/session_handover_check.py")
+    handover_log = Path("workflow/session-handover.md")
 
     must_contain(
         pr_template,
@@ -32,6 +36,8 @@ def main() -> int:
             "NOT_OBSERVED",
             "tea",
             "gh",
+            "Session Handover Gate",
+            "session_handover_check.py --strict",
         ],
         errors,
     )
@@ -45,6 +51,35 @@ def main() -> int:
         ],
         errors,
     )
+    must_contain(
+        workflow_doc,
+        [
+            "Session Handover Gate (Mandatory)",
+            "session_handover_check.py --strict",
+        ],
+        errors,
+    )
+    must_contain(
+        commands_doc,
+        [
+            "Session Handover Preflight (Mandatory)",
+            "session_handover_check.py --strict",
+        ],
+        errors,
+    )
+    must_contain(
+        handover_log,
+        [
+            "Session Handover Log",
+            "- branch:",
+            "- docs_checked:",
+            "- open_issues_reviewed:",
+            "- next_ticket:",
+        ],
+        errors,
+    )
+    if not handover_script.exists():
+        errors.append(f"missing file: {handover_script}")
 
     if errors:
         print("[FAIL] governance asset validation failed")
@@ -58,4 +93,3 @@ def main() -> int:
 
 if __name__ == "__main__":
     sys.exit(main())
-

workflow/session-handover.md

@@ -0,0 +1,43 @@
+# Session Handover Log
+
+목적: 세션 시작 시 인수인계 확인을 기록하고, 구현/검증 작업 시작 전에 공통 컨텍스트를 강제한다.
+
+작성 규칙:
+- 세션 시작마다 최신 엔트리를 맨 아래에 추가한다.
+- `docs/workflow.md`, `docs/commands.md`, `docs/agent-constraints.md`를 먼저 확인한 뒤 기록한다.
+- 각 엔트리는 현재 작업 브랜치 기준으로 작성한다.
+
+템플릿:
+
+```md
+### YYYY-MM-DD | session=<id or short label>
+- branch: <current-branch>
+- docs_checked: docs/workflow.md, docs/commands.md, docs/agent-constraints.md
+- open_issues_reviewed: #...
+- next_ticket: #...
+- process_gate_checked: process_ticket=#..., merged_to_feature_branch=yes|no|n/a
+- risks_or_notes: ...
+```
+
+### 2026-02-27 | session=handover-gate-bootstrap
+- branch: feature/v3-session-policy-stream
+- docs_checked: docs/workflow.md, docs/commands.md, docs/agent-constraints.md
+- open_issues_reviewed: #304, #305, #306
+- next_ticket: #304
+- risks_or_notes: 세션 시작 게이트를 문서/스크립트/CI로 강제 적용
+
+### 2026-02-27 | session=codex-handover-start
+- branch: feature/v3-session-policy-stream
+- docs_checked: docs/workflow.md, docs/commands.md, docs/agent-constraints.md
+- open_issues_reviewed: #306, #308, #309
+- next_ticket: #304
+- process_gate_checked: process_ticket=#306,#308 merged_to_feature_branch=yes
+- risks_or_notes: 미추적 로컬 파일 존재(문서/DB/lock)로 커밋 범위 분리 필요
+
+### 2026-02-27 | session=codex-process-gate-hardening
+- branch: feature/issue-304-runtime-staged-exit-semantics
+- docs_checked: docs/workflow.md, docs/commands.md, docs/agent-constraints.md
+- open_issues_reviewed: #304, #305
+- next_ticket: #304
+- process_gate_checked: process_ticket=#306,#308 merged_to_feature_branch=yes
+- risks_or_notes: process-change-first 실행 게이트를 문서+스크립트로 강화