baserCMS Plugin 4 to 5 Upgrade Agent Skill

Guides the migration of baserCMS 4 plugin code to baserCMS 5 with actionable refactoring patterns for CakePHP 5 compatibility.

Context cost
20.4k tokensestimated from the bundle, loaded when it triggers
Bundle
1 file · 81.4 kBtext throughout, nothing executable
Licence
MITthe author’s own terms
Last change
—no release on file
Servers it uses
Noneruns standalone

What it does

baserCMS 4 (CakePHP 2ベース) のプラグイン内部コードを baserCMS 5 (CakePHP 5ベース) へ移行する際の、Controller/Table/Entity/View/Helper/フォーム/Vue・JS の具体的な書き換えパターン集。「プラグインを4から5へ移行」「admin_ メソッドを Controller/Admin へ」「public $belongsTo/$hasMany を initialize() へ」「ClassRegistry/TableRegistry」「find(all/first/list, 配列) をクエリビルダへ」「$this->Model(null)を fetchTable へ」「getControlSource の単数→複数形」「$this->Form を BcAdminForm・control() へ」「検索フォーム searches/→search/」「FormHelper::create 文字列モデル→null」「FormHelper::year()/month()/domId() 廃止」「Time::format の ICU パターン」「Number::format/Text::truncate の null 不可」「配列条件の IN 自動付与なし・null は IS」「Vue/JS の admin…

What this skill changes about the agent has not been set out here as a list. Its SKILL.md, shown below, says it in the author’s own words.

contentrefactoring

The skill itself

A skill is instructions the model reads, so you can see what you are getting: below is the start of its SKILL.md. The front matter loads with every session, the body loads when the skill triggers, and the whole file comes with the install.

SKILL.md81.4 kB · preview
--- name: basercms-plugin-4-to-5-upgrade license: MIT ---
7# baserCMS プラグイン内部コードの 4 → 5 移行パターン集
8
9BcAddonMigrator でプラグインの雛形を5系へ変換した**後**に必要となる、手作業のコード書き換えパターンを症状別にまとめたもの。サイト全体の移行手順(baserCMS5 のインストール、BcDbMigrator でのデータ移行、テーマ変換、プラグインの変換手順=ZIP化→bc_addon_migrator→配置、Git/リポジトリ運用)は **basercms4-to-5-upgrade** スキルを参照。本スキルはそこから呼ばれ、プラグインの Controller / Table / Entity / View / Helper / フォーム / Vue・JS を1画面ずつ通して動かすための具体策を提供する。
10
11本スキルが扱うのは**4系イディオムの検出と変換**である。**5系の正しい書き方の正本は basercms5-plugin-development**(テーマは basercms5-theme-development)であり、変換先の仕様(ORM・コントローラ・フォーム・イベント・Vue連携・日付/数値・ルーティング)に迷ったらそちらを参照する。以下の各節は「4系イディオムの検出(症状・grep パターン)→ 変換の要点 → 正本スキルの該当節」の形で読む。
12
13**ブログ記事等にカスタムフィールドを後付けする4系プラグインを5系標準の bc-custom-content へ移行する場合は、本スキルではなく basercms5-custom-content-development を参照する**(bc-custom-content は既存 blog_posts への後付けフィールド追加には使えず、独立したコンテンツ種別として作り直す設計になるため、通常のプラグイン内部コード変換とは別の専用パターン集が必要)。
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15> **推奨: 移行に着手する前に一度 basercms5-claude-workflow-setup(環境セットアップ)を参照し、進め方の環境(設計=superpowers brainstorming/権限整理=permissions-audit/その上での Auto mode/spec・plan の Markdown プレビュー)を整える。提案ベースで、整っていればスキップ。下記「移行の進め方」はその環境の上で回す。**
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17## 移行の進め方(最重要・最初にやる順序)
18プラグインの 4→5 移行は、**画面を1枚ずつ場当たりで直す前に、まず横断で全体を片付ける**のが速くて安全。実証済みの推奨順序:
19
20> **★★[必須ゲート] あるプラグインの5系化に着手したら、コードを1行でも触る前に、まずステップ1の「ファイル状態台帳」を作る。台帳が無いうちは静的監査(2)も構文変換(3)も始めない。** これは飛ばしやすい(監査や Table 変換にすぐ着手したくなる)が、台帳が無いと「どのファイルが未着手/見送りか」を俯瞰できず、進捗の抜け・二重作業・deferred の取りこぼしが起きる。台帳ファイルを作成 → プレビュー(markdown-to-html)→ それから 2 以降に進む。
21
221. **全ファイルの状態台帳化**: src/templates/js/migration を1行1ファイルで 未着手/移行中/移行済/見送り/対象外 管理(種別×状態サマリ付き、生きたドキュメント)。どこが残っているか俯瞰できる。作成後は状態が変わるたびに更新する(例: docs/migration/<plugin>-file-ledger.md)。
232. **★横断コードチェック(静的監査)を最初に**: 全5系コードをアクション/メソッド単位で4系正本と突合し、移行済 / deferred / 4系残骸 / 未実装 +バグ(深刻度)+ブラウザ確認ポイントを監査ドキュメント化する。**テストを書く前**にやることで、残骸/即Fatal/設計判断が要る箇所を地図化でき手戻りが激減する。並列サブエージェントで種別/ドメイン別に分担すると速い(basercms-unittest の横断監査メモ参照)。
243. **★横断「構文だけ5系化」を次に**: 監査で出た4系残骸を5系構文へ一括変換($this->Model->→fetchTable、find('first',配列)→builder、getDataSource→getConnection、Event の bindModel/$event->data 等。下記 C-0/C-A/§8 のカタログを適用)。**完了条件は「php -l 全クリーン+4系API残骸grepゼロ(deferredのTODO除く)+既存フルスイート回帰ゼロ」。この段では新規テストを書かない**。Fatal を一掃して「5系構文として成立」の土台を作る。外部依存(Slack/メール/CSV/Excel/集計)は中身を移さず // TODO baserCMS5移行: か NotImplementedException で deferred 明示。
254. **テスト&ブラウザで意味検証**: 構文変換だけでは保証できない **entity↔配列・日付marshal・afterSave連鎖・FormProtection・view変数の形・JS連携(C-F2)** を、描画する統合テスト+ブラウザ確認で詰めて 移行済 に上げる。php -l は構文しか見ず描画/JSの死は捕まらないのでこの段が必須。
This is a preview of SKILL.md. Download or install the skill to get the whole thing.
In the file
SKILL.md3,477 words
Files1
LicenceMIT
Why you can read it

Nothing in a skill executes. The client loads the text and the model follows it, so a skill can be audited the way a runbook is — by reading it.

What it costs in context

Skills are not billed by the call. They are paid for in context: every token the instructions occupy is a token your code, your diff and your conversation cannot use. Here is what this one takes and when it takes it.

≈350
always loaded
The name and description, so the model knows the skill exists and when to reach for it.
20,000
on trigger
The instruction body, read only when the skill fires.
10.2%
of a 200k window
Ten skills this size would not fit in the window together.
050k100k150k200k context window

20.4k tokens, estimated from the bundle at four bytes to the token, held for the rest of the session once it triggers. Heavy. Teams tend to install this one per project rather than globally, and load it only when the job comes up.

Servers bill, skills cost

A server charges by the month. A skill charges once per session, in context, and then keeps charging it for as long as the session lives.

Before and after

The same question, put to the same model twice: once as it comes, and once with these instructions loaded.

No worked example has been published for this skill yet.

The procedure it runs

The procedure has not been set out here step by step. It is in the body of its SKILL.md: the start of it is shown above, and the whole file comes with the install.

Prose, not code

These steps are written for a model to follow, not executed by a runtime. It can still be told to skip one, and it will say so when it does.

Servers it uses

None. This skill calls no MCP servers at all.

Everything it needs is in the instructions, so it works in a project with nothing connected — the model reads the file and changes how it works with what it can already reach.

Its SKILL.md does not declare which tools it asks the agent for, so what it touches is whatever the instructions themselves ask for — read them before you install it.

What it asks for
Writes filesnot declared
Network accessnot declared

This SKILL.md carries no allowed-tools line, so neither is declared. A skill grants no permissions of its own — it can only ask for tools your client already has.

What it will not do

Every skill is narrow, and the useful ones say where they stop. These are the jobs this one is the wrong tool for.

What this skill is not for has not been published here. Nothing is implied by that: it is a section the author has not filled in.

What is in the bundle

1 file, 81.4 kB on disk. A bundle is text throughout: the instructions the model reads, plus the templates it fills in.

  • SKILL.md81.4 kB
What is not in it

No dependencies and nothing executable: a skill is text the agent reads, so the bundle is 1 file you can review in full before installing. The MIT licence covers the templates and examples as well as the instructions.

Install

Installing copies the bundle into your project. Nothing runs at install time — the files sit on disk until the model reads them.

# baserCMS Plugin 4 to 5 Upgrade · 20.4k tokens when loaded · macOS, Linux mkdir -p .claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/basercms-plugin-4-to-5-upgrade/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/basercms-plugin-4-to-5-upgrade" ] && { [ ! -e .claude/skills/basercms-plugin-4-to-5-upgrade ] || { mv .claude/skills/basercms-plugin-4-to-5-upgrade "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/basercms-plugin-4-to-5-upgrade" .claude/skills/ && echo "Installed .claude/skills/basercms-plugin-4-to-5-upgrade"
On Windows, or any OS with Node 20+
npx mcprush@latest skill add baserproject/basercms-plugin-4-to-5-upgrade

Windows PowerShell says 'running scripts is disabled on this system'? Run Set-ExecutionPolicy -Scope CurrentUser RemoteSigned once, or type npx.cmd instead of npx (codex.cmd, gemini.cmd, grok.cmd likewise). PowerShell 7 needs neither. Writes to .claude/skills/basercms-plugin-4-to-5-upgrade/ in the current project. For every project instead, run mkdir -p ~/.claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/basercms-plugin-4-to-5-upgrade/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/basercms-plugin-4-to-5-upgrade" ] && { [ ! -e ~/.claude/skills/basercms-plugin-4-to-5-upgrade ] || { mv ~/.claude/skills/basercms-plugin-4-to-5-upgrade "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/basercms-plugin-4-to-5-upgrade" ~/.claude/skills/ && echo "Installed ~/.claude/skills/basercms-plugin-4-to-5-upgrade" (macOS, Linux) — or add --global to the npx line. The curl line replaces .claude/skills/basercms-plugin-4-to-5-upgrade/ only after the download succeeds, so files left there by another skill of the same name, or by an older release, do not mix in. A copy already there is moved aside, not deleted, and the line prints where.

Which clients pick it up on their own

A skill is a folder of text. Most of these read a skills folder and pick it up without being told; the rest take the same folder another way — an upload in the app, a parameter on an API call — and then choose it by its description just the same.

Claude Code.claude/skills/
Claude DesktopCustomize › Skills
ChatGPTSkills › Create › Upload
Cursor.cursor/skills/
VS Code.github/skills/
Codex CLI.agents/skills/
Gemini CLI.gemini/skills/
Grok Build.grok/skills/
Microsoft CopilotSkills › Upload a skill
PerplexityComputer › Skills › Upload a skill
DeepSeek Harness.dsh/skills/
Zed.agents/skills/
Devin Desktop.devin/skills/
Windsurf (legacy).windsurf/skills/
OpenAI Agents SDKInstructions or sandbox Skills
HTTP / APIa request parameter
This release
Versionnot versioned
Publishedno release date on file
PriceFree
Referencebaserproject/basercms-plugin-4-to-5-upgrade

Versions

Its author publishes no version number, so there is nothing here to pin to: what you install is the folder as it stands today. Instructions change more often than APIs do — a skill can be rewritten entirely without anything it depends on moving.

Pinning

Nothing to pin to: this skill carries no version number of its own. What you install is what the folder holds on the day you install it.

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