# 01 Env Propagation

> Probe env propagation across 3 process tiers (§1.1). Compares which CLAUDE_* env vars are set in plugin-level hook vs skill frontmatter hook vs Bash tool subprocess.

- Skill: `kazukinagata/01-env-propagation` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add kazukinagata/01-env-propagation`
- Raw SKILL.md: https://api.skillmd.com/api/skills/kazukinagata/01-env-propagation/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: kazukinagata (https://skillmd.com/u/kazukinagata)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/kazukinagata/01-env-propagation

---


# 01-env-propagation

§1.1 の env 伝播 3 階層を観測します。

次の bash を順に実行：

## step 1: alive-check と Bash tool 側 env を1ショットで dump

```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 '[01-BODY %s] tag=alive-check\n' "$(date -Iseconds)"
  printf '[01-BODY] CLAUDE_PLUGIN_ROOT=[%s]\n' "${CLAUDE_PLUGIN_ROOT-(unset)}"
  printf '[01-BODY] CLAUDE_PLUGIN_DATA=[%s]\n' "${CLAUDE_PLUGIN_DATA-(unset)}"
  printf '[01-BODY] CLAUDE_PROJECT_DIR=[%s]\n' "${CLAUDE_PROJECT_DIR-(unset)}"
  printf '[01-BODY] CLAUDE_CODE_REMOTE=[%s]\n' "${CLAUDE_CODE_REMOTE-(unset)}"
  printf '[01-BODY] CLAUDE_PLUGIN_OPTION_HELLO_MESSAGE=[%s]\n' "${CLAUDE_PLUGIN_OPTION_HELLO_MESSAGE-(unset)}"
  printf '[01-BODY] CLAUDE_PLUGIN_OPTION_API_SECRET=[%s]\n' "${CLAUDE_PLUGIN_OPTION_API_SECRET-(unset)}"
  printf '[01-BODY] CLAUDE_SKILL_DIR=[%s]\n' "${CLAUDE_SKILL_DIR-(unset)}"
  printf '[01-BODY] CLAUDE_SESSION_ID=[%s]\n' "${CLAUDE_SESSION_ID-(unset)}"
  printf '[01-BODY] CLAUDE_CODE_ENTRYPOINT=[%s]\n' "${CLAUDE_CODE_ENTRYPOINT-(unset)}"
  printf '[01-BODY] CLAUDE_CODE_EXECPATH=[%s]\n' "${CLAUDE_CODE_EXECPATH-(unset)}"
  printf '[01-BODY] ----- all CLAUDE_* -----\n'
  env | grep '^CLAUDE_' | sort
} | tee -a "$out_dir/probe.log"
```

## step 2: hooks.log を見て plugin-level hook 側の env と比較

```bash
proj="${CLAUDE_PROJECT_DIR:-$PWD}"
ver="${VERIFIER_VERSION_DIR:-v-unknown}"
sid="${CLAUDE_SESSION_ID:-no-sid}"
echo "=== hooks.log tail (plugin-level env snapshot) ==="
tail -n 80 "$proj/findings/$ver/$sid/hooks.log"
echo
echo "=== probe.log tail (frontmatter + body env) ==="
tail -n 40 "$proj/findings/$ver/$sid/probe.log"
```

完了したら exit。`./scripts/assert.sh 01` で 3 層の subclaim を判定します。