# 07 Skill Body Subst

> §1.7. Skill body ${VAR} substitution happens at invoke time only — reading the SKILL.md via Read tool returns literal placeholders.

- Skill: `kazukinagata/07-skill-body-subst` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add kazukinagata/07-skill-body-subst`
- Raw SKILL.md: https://api.skillmd.com/api/skills/kazukinagata/07-skill-body-subst/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/07-skill-body-subst

---


# 07-skill-body-subst

CHECK_LINE: PLUGIN_ROOT_VALUE=${CLAUDE_PLUGIN_ROOT}

## step 1: invoke 経路での置換確認

```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 '[07-BODY %s] tag=alive-check\n' "$(date -Iseconds)"
  printf '[07-BODY] INVOKE_LINE: PLUGIN_ROOT_VALUE=${CLAUDE_PLUGIN_ROOT}\n'
} | tee -a "$out_dir/probe.log"
```

`./scripts/assert.sh 07` を叩く前に、**ユーザが別タスクで Read tool 経由の挙動を比較**してください（RUNBOOK 参照）。