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13-cowork-pretooluse

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Actualizado26 de mayo de 2026 a las 03:02

Cowork plugin-level PreToolUse never fires (block ignored) and bash tool is named mcp__workspace__bash (research sections 2.4 and 2.5). CLI baseline confirms block fires for the Bash matcher.

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kazukinagata

kazukinagata/analyzing-claude-plugin

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SKILL.md

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name	13-cowork-pretooluse
description	Cowork plugin-level PreToolUse never fires (block ignored) and bash tool is named mcp__workspace__bash (research sections 2.4 and 2.5). CLI baseline confirms block fires for the Bash matcher.
user-invocable	true

13-cowork-pretooluse

§2.5 — Cowork で plugin-level PreToolUse の block 試行が無視される。bash tool 名は mcp__workspace__bash。

CLI で実際の block 観察をするには、デフォルトの hooks.json では block.sh を呼び出していないため、docs/cowork-runbook.md の "13 CLI baseline" の手順に従い、hooks-block.json variant を一時的に有効化してください。本 SKILL は CLI 既定の hooks.json で動かしてもログ書き出しまでは確認できます。

step 1: alive-check と Bash の test marker

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 '[13-BODY %s] tag=alive-check\n' "$(date -Iseconds)"
  printf '[13-BODY] TEST_BASH_OK_MARKER (CLI without block hook: appears; CLI with block hook: should not appear; Cowork: should appear)\n'
  printf '[13-BODY] CLAUDE_CODE_ENTRYPOINT=[%s]\n' "${CLAUDE_CODE_ENTRYPOINT-(unset)}"
} | tee -a "$out_dir/probe.log"

echo
echo "=== hooks.log block-attempted / pretool entries ==="
grep -E "tag=block-attempted|tag=pretool-bash|tag=pretool-mcp-workspace-bash" "$out_dir/hooks.log" 2>&1 || echo "(none)"

step 2: tool 名の直接観察（transcript 経由）

echo "Cowork で本 probe を回した場合は、Claude Desktop の transcript 上で"
echo "  tool_name=\"mcp__workspace__bash\""
echo "となっているかを目視で確認してください（§2.4）。"
echo
echo "本セッションの hooks.log タグ一覧:"
proj="${CLAUDE_PROJECT_DIR:-$PWD}"
ver="${VERIFIER_VERSION_DIR:-v-unknown}"
sid="${CLAUDE_SESSION_ID:-no-sid}"
grep -oE "tag=[a-z-]+" "$proj/findings/$ver/$sid/hooks.log" 2>/dev/null | sort -u

完了して exit、./scripts/assert.sh 13。

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13-cowork-pretooluse

§2.5 — Cowork で plugin-level PreToolUse の block 試行が無視される。bash tool 名は mcp__workspace__bash。

step 1: alive-check と Bash の test marker

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 '[13-BODY %s] tag=alive-check\n' "$(date -Iseconds)" printf '[13-BODY] TEST_BASH_OK_MARKER (CLI without block hook: appears; CLI with block hook: should not appear; Cowork: should appear)\n' printf '[13-BODY] CLAUDE_CODE_ENTRYPOINT=[%s]\n' "${CLAUDE_CODE_ENTRYPOINT-(unset)}" } | tee -a "$out_dir/probe.log" echo echo "=== hooks.log block-attempted / pretool entries ===" grep -E "tag=block-attempted|tag=pretool-bash|tag=pretool-mcp-workspace-bash" "$out_dir/hooks.log" 2>&1 || echo "(none)"

step 2: tool 名の直接観察（transcript 経由）

echo "Cowork で本 probe を回した場合は、Claude Desktop の transcript 上で" echo " tool_name=\"mcp__workspace__bash\"" echo "となっているかを目視で確認してください（§2.4）。" echo echo "本セッションの hooks.log タグ一覧:" proj="${CLAUDE_PROJECT_DIR:-$PWD}" ver="${VERIFIER_VERSION_DIR:-v-unknown}" sid="${CLAUDE_SESSION_ID:-no-sid}" grep -oE "tag=[a-z-]+" "$proj/findings/$ver/$sid/hooks.log" 2>/dev/null | sort -u

完了して exit、./scripts/assert.sh 13。