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Surfaces which of the five SessionStart hook variants (V1-V5) made it into context, to isolate the hook command form that silently fails to surface on Cowork.
Codex 또는 Claude로 설치 이 Prompt를 복사해 Codex, Claude 또는 다른 어시스턴트에 붙여 넣으면 Skill 페이지를 검토하고 설치를 진행할 수 있습니다.
SOC 직업 분류 기준
Mac Cowork で、plugin-level SessionStart hook(host 側)から $CLAUDE_PLUGIN_DATA に書いた値が「別の chat session を跨いで」残るかを検証する probe。書き込み＆読み戻しは hook(persist.sh)側で行い、その結果は SessionStart の stdout として context に出る。この skill body は対比用に「VM Bash 側から DATA が見えるか／hook が書いたファイルを読めるか」を確認する。
Surfaces UPE_PROBE_* marker lines to test whether the plugin-level UserPromptExpansion hook fires on Cowork. Invoking this skill via slash is itself the trigger; compares against UserPromptSubmit and SessionStart controls.
Triggers the plugin-level PreToolUse hooks by running a sentinel bash command, to test (via session export) whether Cowork runs PreToolUse hook commands through cmd.exe or a POSIX shell, and whether the inline block pattern actually blocks the bash tool.
Surfaces the EXEC_* marker lines emitted by the plugin-level SessionStart hooks, which run hook commands in EXEC FORM (args present). Used to test whether exec form resolves ${CLAUDE_PLUGIN_ROOT} to a real path and exports it as an env var on Cowork, where shell form (§2.1/§2.2) failed both.
Shows what skill-body CLAUDE_PLUGIN_ROOT and friends substitute to on Mac Cowork, whether the VM Bash tool can use that path, and whether the Read tool can read a bundled file at that host path.
Proves whether a skill frontmatter PreToolUse Bash hook fires on Cowork by emitting only a block decision (no echo). A marked bash should be blocked even though no frontmatter stdout surfaces.
| name | surface-check |
| description | Surfaces which of the five SessionStart hook variants (V1-V5) made it into context, to isolate the hook command form that silently fails to surface on Cowork. |
| user-invocable | true |
5 種類の SessionStart hook variant が走りました。どれが context に surface したかを確認します。次の bash を実行してください（host 確認用）。
echo "BODY host=$(hostname)"
実行後、context にある以下の marker 行をすべてそのまま貼ってください（無いものは「無し」と明記）：
[V1] plain — 単一 echo（対照）[V2] a / [V2] b — 複数文 echo[V3] x / [V3] then / [V3] else — if/then/else（redirect なし）[V4] x / [V4] after-redirect — 正常パスへの redirect を挟む[V5] x / [V5] then2 / [V5] else — 空変数へのガード付き redirect（前回 surface しなかった form の再現）判定：
if/then/else 構造が原因