Q39: runs load only model-compatible skills and state each skill's contract

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/main/services/skill-runtime.ts

@@ -0,0 +1,42 @@
+import type { SkillManifest } from "./skill-manifest";
+
+/** The provider and model a run talks to. */
+export interface RunModel {
+  providerKey: string;
+  model: string | null;
+}
+
+/** True when a compatible_models pattern ("openai/*", "gpt-5.4") matches the run's model; no patterns means any model. */
+export function modelCompatible(patterns: string[], run: RunModel): boolean {
+  if (patterns.length === 0) return true;
+  if (!run.model) return false;
+  const names = [`${run.providerKey}/${run.model}`, run.model];
+  return patterns.some((pattern) => {
+    const regex = new RegExp(`^${pattern.split("*").map(escapeRegex).join(".*")}$`, "i");
+    return names.some((name) => regex.test(name));
+  });
+}
+
+export function runModelLabel(run: RunModel): string {
+  return run.model ? `${run.providerKey}/${run.model}` : `${run.providerKey} (no model set)`;
+}
+
+/** One skill's prompt section, its declared risk and contract first. */
+export function skillPart(manifest: SkillManifest, version: string, body: string): string {
+  const header = [`# Skill: ${manifest.name}`, `Version: ${version}`, `Risk: ${manifest.riskLevel}`];
+  const inputs = declaration(manifest.inputs);
+  const outputs = declaration(manifest.outputs);
+  if (inputs) header.push(`Expects as input: ${inputs}`);
+  if (outputs) header.push(`Must produce: ${outputs}`);
+  return [header.join("\n"), body].join("\n\n");
+}
+
+function declaration(value: unknown): string | null {
+  if (typeof value === "string") return value.trim() || null;
+  if (typeof value === "object" && value !== null && Object.keys(value).length > 0) return JSON.stringify(value);
+  return null;
+}
+
+function escapeRegex(text: string): string {
+  return text.replace(/[.+?^${}()|[\]\\]/g, "\\$&");
+}