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Cowork hook command parser is restricted to an echo+bash whitelist; CLI uses /bin/sh. This probe reads the parser-tests.log emitted by a parser-test hook variant.
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
SOC 職業分類に基づく
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 ${CLAUDE_PLUGIN_ROOT} to a real path and exports it as an env var on Cowork, where shell form (§2.1/§2.2) failed both.
Shows what skill-body CLAUDE_PLUGIN_ROOT and friends substitute to on Mac Cowork, whether the VM Bash tool can use that path, and whether the Read tool can read a bundled file at that host path.
Proves whether a skill frontmatter PreToolUse Bash hook fires on Cowork by emitting only a block decision (no echo). A marked bash should be blocked even though no frontmatter stdout surfaces.
| name | 14-cowork-parser |
| description | Cowork hook command parser is restricted to an echo+bash whitelist; CLI uses /bin/sh. This probe reads the parser-tests.log emitted by a parser-test hook variant. |
| user-invocable | true |
§2.6 — Cowork hook command parser の whitelist 検証。
事前準備：default の hooks.json では parser-test エントリは含まれていないので、検証時には verifier/hooks/hooks.json を verifier/hooks/hooks-parser-tests.json の内容に一時的に差し替えて起動してください（cp で上書きし、検証後に git restore）。詳細は docs/cowork-runbook.md 参照。
proj="${CLAUDE_PROJECT_DIR:-$PWD}"
ver="${VERIFIER_VERSION_DIR:-v-unknown}"
sid="${CLAUDE_SESSION_ID:-no-sid}"
out_dir="$proj/findings/$ver/$sid"
mkdir -p "$out_dir"
printf '[14-BODY %s] tag=alive-check\n' "$(date -Iseconds)" | tee -a "$out_dir/probe.log"
echo
if [ -f "$proj/findings/parser-tests.log" ]; then
# Append the raw parser-tests output verbatim. Only the markers that the hook
# actually emitted will appear here; missing markers stay missing (no false pass).
echo "=== parser-tests.log (verbatim) ===" | tee -a "$out_dir/probe.log"
cat "$proj/findings/parser-tests.log" | tee -a "$out_dir/probe.log"
else
echo "(no parser-tests.log — did you swap hooks.json to hooks-parser-tests.json?)" | tee -a "$out_dir/probe.log"
fi
完了して exit、./scripts/assert.sh 14。