# 16 Cowork Path Forms

> CLAUDE_PLUGIN_ROOT and CLAUDE_PLUGIN_DATA take three different forms across contexts in Cowork (Windows, MSYS, Linux mount); CLI baseline is a single Linux path (research sections 2.8 and 7.9).

- Skill: `kazukinagata/16-cowork-path-forms` (Agent Skill)
- Install (CLI): `npx skillmds@latest add kazukinagata/16-cowork-path-forms`
- Raw SKILL.md: https://api.skillmd.com/api/skills/kazukinagata/16-cowork-path-forms/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Research & Search
- Author: kazukinagata (https://skillmd.com/u/kazukinagata)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/kazukinagata/16-cowork-path-forms

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# 16-cowork-path-forms

§2.8 — `CLAUDE_PLUGIN_ROOT/DATA` の 3 形式。

## step 1: skill body 経路で alive-check と path 観察

```bash
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 '[16-BODY %s] tag=alive-check\n' "$(date -Iseconds)"
  printf '[16-BODY BODY_SUBST] ROOT=[${CLAUDE_PLUGIN_ROOT}] DATA=[${CLAUDE_PLUGIN_DATA}]\n'
  printf '[16-BODY BODY_ENV] ROOT=[%s] DATA=[%s]\n' "${CLAUDE_PLUGIN_ROOT-(unset)}" "${CLAUDE_PLUGIN_DATA-(unset)}"
} | tee -a "$out_dir/probe.log"
echo
echo "=== 3 forms of ROOT/DATA in probe.log ==="
grep -E "BODY_SUBST|HOOK_SUBST|HOOK_ENV" "$out_dir/probe.log"
```

完了して exit、`./scripts/assert.sh 16`。