diff --git a/.changeset/agentconnect-root-skill-alias.md b/.changeset/agentconnect-root-skill-alias.md
new file mode 100644
index 0000000..8c46f92
--- /dev/null
+++ b/.changeset/agentconnect-root-skill-alias.md
@@ -0,0 +1,5 @@
+---
+'@polygonlabs/agentconnect-ui': patch
+---
+
+Serve the canonical skill at the legacy root URL. The build now aliases `polygon-agent-cli/SKILL.md` to `/SKILL.md` in the deployed assets, so `https://agentconnect.polygon.technology/SKILL.md` returns the skill markdown (200) instead of falling back to the SPA `index.html`. Deploy-only copy; the repo `skills/` tree is unchanged, so `npx skills add` still lists one canonical skill.
diff --git a/packages/agentconnect-ui/vite.config.ts b/packages/agentconnect-ui/vite.config.ts
index abeeae2..7cc1056 100644
--- a/packages/agentconnect-ui/vite.config.ts
+++ b/packages/agentconnect-ui/vite.config.ts
@@ -12,10 +12,19 @@ const pkgDir = path.dirname(fileURLToPath(import.meta.url));
 const skillsDir = path.resolve(pkgDir, '../../skills');
 
 // Copy the repo's agent skill tree into the build output so the deployed
-// Cloudflare worker serves them as static assets at /SKILL.md,
-// /polygon-agent-cli/SKILL.md, /polygon-defi/SKILL.md, etc. — the URLs the
-// dashboard and the skills themselves reference. Without this the skills are
-// only reachable from the retired connector-ui deployment.
+// Cloudflare worker serves them as static assets at /polygon-agent-cli/SKILL.md,
+// /polygon-defi/SKILL.md, etc. — the URLs the dashboard and the skills
+// themselves reference. Without this the skills are only reachable from the
+// retired connector-ui deployment.
+//
+// Also alias the canonical skill to the legacy root /SKILL.md. The repo no
+// longer has a root skills/SKILL.md (removed to stop `npx skills add` offering
+// two near-identical skills), but external docs and older installs still fetch
+// the bare /SKILL.md — without this alias that path hits the SPA fallback and
+// returns index.html instead of markdown. This is a deploy-only copy, so it
+// does not put a second SKILL.md back into the repo skills/ tree.
+const CANONICAL_SKILL = path.join('polygon-agent-cli', 'SKILL.md');
+
 function serveSkills(): Plugin {
   let absOutDir = path.resolve(pkgDir, 'dist');
   return {
@@ -32,6 +41,16 @@ function serveSkills(): Plugin {
       // Mirror skills/* into dist/* (dist already holds the built SPA; the
       // skill tree only adds .md files under new paths, no collisions).
       fs.cpSync(skillsDir, absOutDir, { recursive: true });
+
+      // Legacy /SKILL.md → canonical skill content (200, not a redirect).
+      const canonical = path.join(skillsDir, CANONICAL_SKILL);
+      if (fs.existsSync(canonical)) {
+        fs.copyFileSync(canonical, path.join(absOutDir, 'SKILL.md'));
+      } else {
+        console.warn(
+          `[serve-skills] canonical skill missing at ${canonical}; /SKILL.md not aliased`
+        );
+      }
     }
   };
 }