fix(skills): support names beginning with digits

apps/mobile/modules/t3-markdown-text/src/nativeMarkdownText.ts

@@ -195,7 +195,7 @@ function appendRun(
   return runs;
 }
 
-const SKILL_TOKEN_REGEX = /(^|\s)\$([a-zA-Z][a-zA-Z0-9:_-]*)(?=\s|$)/g;
+const SKILL_TOKEN_REGEX = /(^|\s)\$([a-zA-Z0-9][a-zA-Z0-9:_-]*)(?=\s|$)/g;
 
 function formatSkillLabel(skill: SelectableMarkdownSkill): string {
   const displayName = skill.displayName?.trim();

apps/mobile/src/lib/nativeMarkdownText.test.ts

@@ -226,6 +226,29 @@ describe("nativeMarkdownDocumentRuns", () => {
     ]);
   });
 
+  it("decorates known skill references that begin with a digit", () => {
+    const node: MarkdownNode = {
+      type: "document",
+      children: [
+        {
+          type: "paragraph",
+          children: [{ type: "text", content: "Use $2spec for this." }],
+        },
+      ],
+    };
+
+    expect(nativeMarkdownDocumentRuns(node, [{ name: "2spec", displayName: "2Spec" }])).toEqual([
+      { text: "Use ", role: "body" },
+      {
+        text: "$2spec",
+        role: "body",
+        skillName: "2spec",
+        skillLabel: "2Spec",
+      },
+      { text: " for this.", role: "body" },
+    ]);
+  });
+
   it("decorates known skill references inside blockquotes", () => {
     const node: MarkdownNode = {
       type: "blockquote",

apps/server/src/provider/Drivers/ClaudeSkillDispatch.test.ts

@@ -2,7 +2,7 @@ import { describe, expect, it } from "vite-plus/test";
 
 import { planClaudeSkillDispatch } from "./ClaudeSkillDispatch.ts";
 
-const SKILLS = new Set(["implement", "review", "re-release-version"]);
+const SKILLS = new Set(["2spec", "implement", "review", "re-release-version"]);
 
 describe("planClaudeSkillDispatch", () => {
   it("leaves a prompt without a known skill untouched", () => {
@@ -27,6 +27,14 @@ describe("planClaudeSkillDispatch", () => {
     });
   });
 
+  it("dispatches a known skill whose name begins with a digit", () => {
+    expect(planClaudeSkillDispatch("use $2spec for this", SKILLS)).toEqual({
+      leadingText: "use",
+      commandText: "/2spec for this",
+      skillName: "2spec",
+    });
+  });
+
   it("dispatches the last mention and rewrites earlier ones inline", () => {
     expect(planClaudeSkillDispatch("$review the diff, then $implement the fixes", SKILLS)).toEqual({
       leadingText: "/review the diff, then",

apps/server/src/provider/Drivers/ClaudeSkillDispatch.ts

@@ -29,7 +29,7 @@
  * (`packages/shared/src/composerInlineTokens.ts`), so a rendered chip and a
  * dispatched skill are always the same set.
  */
-const SKILL_MENTION_PATTERN = /(^|\s)\$([a-zA-Z][a-zA-Z0-9:_-]*)(?=\s|$)/g;
+const SKILL_MENTION_PATTERN = /(^|\s)\$([a-zA-Z0-9][a-zA-Z0-9:_-]*)(?=\s|$)/g;
 
 export interface ClaudeSkillDispatch {
   /** Text before the dispatched mention, or `undefined` when it opens the prompt. */

apps/web/src/components/ChatMarkdown.test.tsx

@@ -92,6 +92,21 @@ describe("hasMarkdownFilePrimaryAction", () => {
   });
 });
 
+describe("ChatMarkdown skill chips", () => {
+  it("renders known skill references that begin with a digit", () => {
+    const html = renderToStaticMarkup(
+      <ChatMarkdown
+        cwd="/tmp/project"
+        text="Use $2spec for this."
+        skills={[{ name: "2spec", displayName: "2Spec" }]}
+      />,
+    );
+
+    expect(html).toContain('data-markdown-copy="$2spec"');
+    expect(html).toContain("2Spec");
+  });
+});
+
 describe("ChatMarkdown file option chips", () => {
   it("keeps the fallback button text selectable", () => {
     const html = renderToStaticMarkup(

apps/web/src/components/chat/SkillInlineText.tsx

@@ -10,7 +10,7 @@ import {
 } from "../composerInlineChip";
 import { cn } from "~/lib/utils";
 
-const SKILL_TOKEN_REGEX = /(^|\s)\$([a-zA-Z][a-zA-Z0-9:_-]*)(?=\s|$)/g;
+const SKILL_TOKEN_REGEX = /(^|\s)\$([a-zA-Z0-9][a-zA-Z0-9:_-]*)(?=\s|$)/g;
 
 type InlineSkill = Pick<ServerProviderSkill, "name" | "displayName">;
 

apps/web/src/composer-editor-mentions.test.ts

@@ -198,6 +198,14 @@ describe("splitPromptIntoComposerSegments", () => {
     ]);
   });
 
+  it("splits digit-leading skill tokens into skill segments", () => {
+    expect(splitPromptIntoComposerSegments("Use $2spec please")).toEqual([
+      { type: "text", text: "Use " },
+      { type: "skill", name: "2spec" },
+      { type: "text", text: " please" },
+    ]);
+  });
+
   it("does not convert an incomplete trailing skill token", () => {
     expect(splitPromptIntoComposerSegments("Use $review-follow-up")).toEqual([
       { type: "text", text: "Use $review-follow-up" },

packages/shared/src/composerInlineTokens.test.ts

@@ -31,6 +31,18 @@ describe("collectComposerInlineTokens", () => {
     ]);
   });
 
+  it("collects skill names that begin with a digit", () => {
+    expect(collectComposerInlineTokens("Use $2spec next")).toEqual([
+      {
+        type: "skill",
+        value: "2spec",
+        source: "$2spec",
+        start: 4,
+        end: 10,
+      },
+    ]);
+  });
+
   it("does not convert incomplete trailing tokens", () => {
     expect(collectComposerInlineTokens("Use $ui")).toEqual([]);
     expect(collectComposerInlineTokens("Inspect @AGENTS.md")).toEqual([]);

packages/shared/src/composerInlineTokens.ts

@@ -18,7 +18,7 @@ export interface CollectComposerInlineTokensOptions {
   readonly preserveTrailingFrom?: ReadonlyArray<ComposerInlineToken>;
 }
 
-const SKILL_TOKEN_REGEX = /(^|\s)\$([a-zA-Z][a-zA-Z0-9:_-]*)(?=\s)/g;
+const SKILL_TOKEN_REGEX = /(^|\s)\$([a-zA-Z0-9][a-zA-Z0-9:_-]*)(?=\s)/g;
 const MENTION_TOKEN_REGEX = /(^|\s)@(?:"((?:\\.|[^"\\])*)"|([^\s@"]+))(?=\s)/g;
 /**
  * The label body is bounded rather than `*`. Unbounded, every whitespace in