docs: fix ECC setup reference drift

.claude/rules/node.md

@@ -27,10 +27,10 @@
 
 ## Hook Development
 
-- Hook scripts receive JSON on stdin — always `const input = JSON.parse(fs.readFileSync(0, 'utf8'))`
+- Hook scripts normally receive JSON on stdin, but hooks routed through `scripts/hooks/run-with-flags.js` can export `run(rawInput)` and let the wrapper handle parsing/gating
 - Async hooks: mark `"async": true` in `settings.json` with a timeout ≤30s
 - Blocking hooks (PreToolUse, stop): keep fast (<200ms) — no network calls
-- Use `run-with-flags.js` wrapper for all hooks so `CLAUDE_ECC_MODE` gating works
+- Use `run-with-flags.js` wrapper for all hooks so `ECC_HOOK_PROFILE` and `ECC_DISABLED_HOOKS` runtime gating works
 - Always exit 0 on parse errors; log to stderr with `[HookName]` prefix
 
 ## Testing Requirements