Skill v1.0.0

version: "1.0.0" name: Artifact Gate description: Check that each product-development stage has durable documents before moving to the next gate. when-to-use: Use before implementation, before QA/Reviewer dispatch, and before final completion. user-invocable: false context: inline

Use this skill to prevent "the team talked about it" from replacing durable project artifacts.

Default document set for ordinary software product work:

• PRD.md
• UX_DESIGN.md
• BACKEND_PLAN.md
• FRONTEND_PLAN.md
• INTERFACE_CONTRACT.md
• INTEGRATION_REPORT.md
• QA_REPORT.md
• REVIEW_REPORT.md

Gate checks:

1. Before UX Design

• PRD.md exists and includes goals, scope, user flow, functional requirements, data requirements, and acceptance criteria.

1. Before technical plans

• PRD.md and UX_DESIGN.md exist.
• Design includes states, interaction flow, copy, accessibility, and platform constraints.

1. Before implementation

• BACKEND_PLAN.md and FRONTEND_PLAN.md exist.
• INTERFACE_CONTRACT.md exists and is acknowledged by both Frontend and Backend.
• Team Leader has checked plan boundaries and called RecordTeamContract.
• For CLI/TUI/local tools with persistence, INTERFACE_CONTRACT.md names one concrete storage path resolution and subprocess-visible test isolation mechanism. Reject vague language such as "environment variable or monkeypatch" because monkeypatch does not cross subprocess boundaries. Reject function parameter-only overrides unless the launched CLI/API exposes that parameter through a flag, environment variable, config path, fixture path, or cwd convention.

1. Before QA/Reviewer

• Implementation files exist under the project root.
• INTEGRATION_REPORT.md exists or the Team Leader has explicitly dispatched integration evidence work.

1. Before completion

• QA_REPORT.md exists and QA has called SubmitGateVerdict.
• REVIEW_REPORT.md exists and Reviewer has called SubmitGateVerdict.
• Required commands and integration smokes in the Team Acceptance Contract have evidence.

If any document is missing:

• Do not continue as if the stage is complete.
• Dispatch a recovery task to the owner.
• If the document is truly not applicable, record the reason in the Team Acceptance Contract or CompleteTeamTask.deferral_reasons.

Embedded helper:

If you want a mechanical check, create this temporary helper inside the project root or run it with python3 - <<'PY' ... PY. Do not rely on a separate file in the skill directory.

#!/usr/bin/env python3
"""Check required product-development stage documents under a project root."""
from __future__ import annotations
import pathlib
import sys
REQUIRED = [
    "PRD.md",
    "UX_DESIGN.md",
    "BACKEND_PLAN.md",
    "FRONTEND_PLAN.md",
    "INTERFACE_CONTRACT.md",
    "INTEGRATION_REPORT.md",
    "QA_REPORT.md",
    "REVIEW_REPORT.md",
]
def main(argv: list[str]) -> int:
    if len(argv) != 2:
        print("usage: check_stage_docs.py <project_root>", file=sys.stderr)
        return 2
    root = pathlib.Path(argv[1]).expanduser().resolve()
    missing = [name for name in REQUIRED if not (root / name).is_file()]
    if missing:
        print("missing stage documents:")
        for name in missing:
            print(f"- {name}")
        return 1
    print("all required stage documents exist")
    return 0
if __name__ == "__main__":
    raise SystemExit(main(sys.argv))