feat(interns): add repo_read routing to using-interns + Node/repomix checks to setup-interns [v0.2.0]

using-interns: overview table 2→3 interns, routing hints for repo_read
vs bulk_text_read, tool quick reference row. setup-interns: Phase 0
adds node --version check + optional repomix pre-warm.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

skills/setup-interns/SKILL.md

@@ -1,6 +1,6 @@
 ---
 name: setup-interns
-version: 0.1.0
+version: 0.2.0
 description: Installs and configures the local `interns` MCP server — a FastMCP stdio app at `<project-root>/.common/lib/interns-mcp/` that delegates bulk reads, transcript distillation, and other predictable I/O to cheap intern LLMs (DeepSeek / Kimi / Ollama) so Claude saves Anthropic quota. Procedure: detect the server source, `pip install -e` it, write `.common/secrets/interns.env` with the endpoint API keys, register `mcpServers.interns` in `~/.claude.json`. Use this skill when the user says "install interns", "set up interns", "configure interns", "настрой интернов", "установи интернов", "interns не работает", "interns isn't working", or whenever the `mcp__interns__*` tools are missing in a session that needs delegation. Cross-platform — Windows / Linux / macOS. Mutates user-level config and writes secrets; pauses for confirmation before every write.
 ---
 
@@ -35,6 +35,8 @@ The procedure runs `pip install`, writes `.common/secrets/interns.env` (carries
 
 - Confirm Claude Code is the current harness (need `mcpServers` registration in `~/.claude.json`).
 - Confirm `python` ≥ 3.11 and `pip` are on `PATH`. Report the resolved interpreter path (`python -c "import sys; print(sys.executable)"`); the skill will pin this exact path in the MCP registration so a later `python` shadowed by another env doesn't silently take over.
+- Confirm `node` is on `PATH` (`node --version`). The `repo_read` intern runs `npx repomix@latest` as a subprocess. If `node` is absent, the user must install Node.js 20+ before proceeding — `repo_read` calls will fail at runtime with a clear "node not found" error.
+- (Optional, recommended) Pre-warm the repomix binary: `npx --yes repomix@latest --version`. This caches the package so the first real `repo_read` call is instant (5–10s first-run penalty avoided). Skip silently on failure — the call will just be slower the first time.
 - Confirm network reachability to the configured endpoints (default: `https://ollama.com/v1`). On HTTP 401 / 403 later, the API key is dead — stop and ask for a new one.
 - Pick paths: `<project-root>/.common/lib/interns-mcp/` (source), `<project-root>/.common/config/interns/config.yaml` (catalog), `<project-root>/.common/secrets/interns.env` (keys, gitignored), `~/.claude.json` (MCP registration). POSIX-style paths resolve correctly under git-bash on Windows.