feat(events): a dry run carries a module's advice (MODULE_API 1.16.0)

An action answering verify: true with { ok: true, detail: { warnings } } has
each line shown as a warning finding (code `advice`) that never fails the
dry run. Strings only, at most ten per step, each cut at 500 characters;
anything else under warnings is ignored, and a refused step carries none.

Rust PLAN_REDESIGNS §11.4, D391: a raid base's spot is checked against the
world as it stands now (a player on it, a rock beside it), which may change
before the run, so the editor shows it as advice. One optional reading of an
existing member, so minor; Module-uo's ^1.10.0 still resolves and says no
warnings. STEAM_SIGNIN.md's claim moves to 1.17.0.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY

server/src/events/verify.js

@@ -36,6 +36,26 @@ const authorize = require('./authorize')
 const settingsDb = require('../model/events/eventActionSettings.db')
 const registries = require('../modules/registries')
 
+/** The most advice lines one step's dry run carries, and the longest one. */
+const ADVICE_MAX = 10
+const ADVICE_CHARS = 500
+
+/**
+ * A dry run's `detail.warnings`, as the lines a dry run shows: strings only,
+ * trimmed, the empty dropped, at most ten, each cut at 500 characters. Anything
+ * else a module put there is ignored rather than refused — advice that cannot be
+ * read is not a reason to fail a plan that would run.
+ */
+function adviceOf(detail) {
+  if (!detail || typeof detail !== 'object' || !Array.isArray(detail.warnings)) return []
+  return detail.warnings
+    .filter((w) => typeof w === 'string')
+    .map((w) => w.trim())
+    .filter(Boolean)
+    .slice(0, ADVICE_MAX)
+    .map((w) => (w.length > ADVICE_CHARS ? `${w.slice(0, ADVICE_CHARS - 1)}…` : w))
+}
+
 /**
  * Dry-run a spec.
  *
@@ -108,13 +128,21 @@ async function verifySpec(spec, { user = null, scope = '' } = {}) {
     )
     if (result.outcome === 'retry' || result.outcome === 'terminal') {
       findings.push({ ...where, level: 'error', code: 'refused', message: result.error })
-    } else if (result.actionVersionDrift) {
-      findings.push({
-        ...where,
-        level: 'warning',
-        code: 'version-drift',
-        message: `authored against version ${result.actionVersionDrift.authored}; ${step.actionId} is now version ${result.actionVersionDrift.registered}`,
-      })
+    } else {
+      if (result.actionVersionDrift) {
+        findings.push({
+          ...where,
+          level: 'warning',
+          code: 'version-drift',
+          message: `authored against version ${result.actionVersionDrift.authored}; ${step.actionId} is now version ${result.actionVersionDrift.registered}`,
+        })
+      }
+      // MODULE_API 1.16.0: a module's ADVICE on a step that would run — the
+      // world as it stands now, which may change before the run does (Rust
+      // PLAN_REDESIGNS §11.4, D391). A warning, so it never fails the dry run.
+      for (const message of adviceOf(result.detail)) {
+        findings.push({ ...where, level: 'warning', code: 'advice', message })
+      }
     }
   }
 
@@ -150,4 +178,4 @@ async function verifySpec(spec, { user = null, scope = '' } = {}) {
   }
 }
 
-module.exports = { verifySpec }
+module.exports = { verifySpec, adviceOf }