diff --git a/src/resources/extensions/gsd/preferences-skills.ts b/src/resources/extensions/gsd/preferences-skills.ts
index 1ad5a6d39..d930ba0b4 100644
--- a/src/resources/extensions/gsd/preferences-skills.ts
+++ b/src/resources/extensions/gsd/preferences-skills.ts
@@ -24,13 +24,18 @@ export type { GSDSkillRule, SkillDiscoveryMode, SkillResolution, SkillResolution
 
 /**
  * Known skill directories, in priority order.
- * Global skills (~/.agents/skills/) take precedence over project skills.
+ * Searches both the skills.sh ecosystem directory (~/.agents/skills/) and
+ * Claude Code's official directory (~/.claude/skills/). Project-level
+ * directories for both conventions are included as well.
  * Legacy ~/.gsd/agent/skills/ is included as a fallback for pre-migration installs.
  */
 export function getSkillSearchDirs(cwd: string): Array<{ dir: string; method: SkillResolution["method"] }> {
   const dirs: Array<{ dir: string; method: SkillResolution["method"] }> = [
     { dir: join(homedir(), ".agents", "skills"), method: "user-skill" },
     { dir: join(cwd, ".agents", "skills"), method: "project-skill" },
+    // Claude Code official skill directories
+    { dir: join(homedir(), ".claude", "skills"), method: "user-skill" },
+    { dir: join(cwd, ".claude", "skills"), method: "project-skill" },
   ];
   // Legacy fallback — read skills from old GSD directory only if migration hasn't completed
   const legacyDir = join(homedir(), ".gsd", "agent", "skills");
diff --git a/src/resources/extensions/gsd/skill-catalog.ts b/src/resources/extensions/gsd/skill-catalog.ts
index 8f1c5d760..7a061b067 100644
--- a/src/resources/extensions/gsd/skill-catalog.ts
+++ b/src/resources/extensions/gsd/skill-catalog.ts
@@ -935,13 +935,16 @@ export async function installPacksBatched(
 
 /**
  * Check if any skills from a pack are already installed.
+ * Searches both the skills.sh ecosystem directory and Claude Code's official directory.
  */
 export function isPackInstalled(pack: SkillPack): boolean {
-  const skillsDir = join(homedir(), ".agents", "skills");
-  if (!existsSync(skillsDir)) return false;
+  const skillsDirs = [
+    join(homedir(), ".agents", "skills"),
+    join(homedir(), ".claude", "skills"),
+  ];
 
   return pack.skills.every((name) =>
-    existsSync(join(skillsDir, name, "SKILL.md")),
+    skillsDirs.some((dir) => existsSync(join(dir, name, "SKILL.md"))),
   );
 }
 
diff --git a/src/resources/extensions/gsd/skill-discovery.ts b/src/resources/extensions/gsd/skill-discovery.ts
index e8c224ea4..459236635 100644
--- a/src/resources/extensions/gsd/skill-discovery.ts
+++ b/src/resources/extensions/gsd/skill-discovery.ts
@@ -12,8 +12,9 @@ import { existsSync, readdirSync, readFileSync } from "node:fs";
 import { join } from "node:path";
 import { homedir } from "node:os";
 
-/** Industry-standard skills.sh global skills directory */
+/** Skills directories — skills.sh ecosystem + Claude Code official */
 const SKILLS_DIR = join(homedir(), ".agents", "skills");
+const CLAUDE_SKILLS_DIR = join(homedir(), ".claude", "skills");
 
 export interface DiscoveredSkill {
   name: string;
@@ -58,8 +59,9 @@ export function detectNewSkills(): DiscoveredSkill[] {
   for (const dir of current) {
     if (baselineSkills.has(dir)) continue;
 
-    const skillMdPath = join(SKILLS_DIR, dir, "SKILL.md");
-    if (!existsSync(skillMdPath)) continue;
+    // Check both skill directories for the SKILL.md file
+    const skillMdPath = resolveSkillMdPath(dir);
+    if (!skillMdPath) continue;
 
     const meta = parseSkillFrontmatter(skillMdPath);
     if (meta) {
@@ -97,10 +99,10 @@ ${entries}
 
 // ─── Internals ────────────────────────────────────────────────────────────────
 
-function listSkillDirs(): string[] {
-  if (!existsSync(SKILLS_DIR)) return [];
+function listSkillDirsFrom(dir: string): string[] {
+  if (!existsSync(dir)) return [];
   try {
-    return readdirSync(SKILLS_DIR, { withFileTypes: true })
+    return readdirSync(dir, { withFileTypes: true })
       .filter(d => d.isDirectory())
       .map(d => d.name);
   } catch {
@@ -108,6 +110,13 @@ function listSkillDirs(): string[] {
   }
 }
 
+function listSkillDirs(): string[] {
+  const names = new Set<string>();
+  for (const name of listSkillDirsFrom(SKILLS_DIR)) names.add(name);
+  for (const name of listSkillDirsFrom(CLAUDE_SKILLS_DIR)) names.add(name);
+  return [...names];
+}
+
 function parseSkillFrontmatter(path: string): { name?: string; description?: string } | null {
   try {
     const content = readFileSync(path, "utf-8");
@@ -131,6 +140,14 @@ function parseSkillFrontmatter(path: string): { name?: string; description?: str
   }
 }
 
+function resolveSkillMdPath(skillName: string): string | null {
+  for (const dir of [SKILLS_DIR, CLAUDE_SKILLS_DIR]) {
+    const candidate = join(dir, skillName, "SKILL.md");
+    if (existsSync(candidate)) return candidate;
+  }
+  return null;
+}
+
 function escapeXml(text: string): string {
   return text
     .replace(/&/g, "&amp;")
diff --git a/src/resources/extensions/gsd/skill-health.ts b/src/resources/extensions/gsd/skill-health.ts
index 75217a5b6..6caca9464 100644
--- a/src/resources/extensions/gsd/skill-health.ts
+++ b/src/resources/extensions/gsd/skill-health.ts
@@ -207,9 +207,13 @@ export function formatSkillDetail(basePath: string, skillName: string): string {
     lines.push(`  ${date}  ${u.id.padEnd(20)}  ${formatTokenCount(u.tokens.total).padStart(8)} tokens  ${formatCost(u.cost)}`);
   }
 
-  // Check for SKILL.md existence
-  const skillPath = join(homedir(), ".agents", "skills", skillName, "SKILL.md");
-  if (existsSync(skillPath)) {
+  // Check for SKILL.md existence — search both ecosystem and Claude Code directories
+  const candidatePaths = [
+    join(homedir(), ".agents", "skills", skillName, "SKILL.md"),
+    join(homedir(), ".claude", "skills", skillName, "SKILL.md"),
+  ];
+  const skillPath = candidatePaths.find(p => existsSync(p));
+  if (skillPath) {
     const stat = statSync(skillPath);
     lines.push("");
     lines.push(`SKILL.md: ${skillPath}`);
diff --git a/src/resources/extensions/gsd/skill-telemetry.ts b/src/resources/extensions/gsd/skill-telemetry.ts
index f1bddfd21..e5ec9c82c 100644
--- a/src/resources/extensions/gsd/skill-telemetry.ts
+++ b/src/resources/extensions/gsd/skill-telemetry.ts
@@ -31,12 +31,14 @@ const activelyLoadedSkills = new Set<string>();
  */
 export function captureAvailableSkills(): void {
   const skillsDir = join(homedir(), ".agents", "skills");
+  const claudeSkillsDir = join(homedir(), ".claude", "skills");
   const legacyDir = join(homedir(), ".gsd", "agent", "skills");
   const names = listSkillNames(skillsDir);
+  const claudeNames = listSkillNames(claudeSkillsDir);
   // Include skills still in the legacy directory only if migration hasn't completed
   const legacyMigrated = existsSync(join(legacyDir, ".migrated-to-agents"));
   const legacyNames = legacyMigrated ? [] : listSkillNames(legacyDir);
-  const all = new Set([...names, ...legacyNames]);
+  const all = new Set([...names, ...claudeNames, ...legacyNames]);
   availableSkills = [...all];
   activelyLoadedSkills.clear();
 }
@@ -106,10 +108,11 @@ export function detectStaleSkills(
 
   // Check all installed skills, not just those with usage data
   const skillsDir = join(homedir(), ".agents", "skills");
+  const claudeSkillsDir = join(homedir(), ".claude", "skills");
   const legacyDir = join(homedir(), ".gsd", "agent", "skills");
   const legacyMigrated = existsSync(join(legacyDir, ".migrated-to-agents"));
   const legacyNames = legacyMigrated ? [] : listSkillNames(legacyDir);
-  const installedSet = new Set([...listSkillNames(skillsDir), ...legacyNames]);
+  const installedSet = new Set([...listSkillNames(skillsDir), ...listSkillNames(claudeSkillsDir), ...legacyNames]);
   const installed = [...installedSet];
 
   for (const skill of installed) {
diff --git a/src/resources/extensions/gsd/tests/claude-skill-dirs.test.ts b/src/resources/extensions/gsd/tests/claude-skill-dirs.test.ts
new file mode 100644
index 000000000..90e6aa5be
--- /dev/null
+++ b/src/resources/extensions/gsd/tests/claude-skill-dirs.test.ts
@@ -0,0 +1,51 @@
+/**
+ * Tests for Claude Code skill directory support in getSkillSearchDirs().
+ *
+ * Verifies that ~/.claude/skills/ and .claude/skills/ are included in
+ * the skill search path alongside ~/.agents/skills/ and .agents/skills/.
+ */
+
+import { describe, test } from "node:test";
+import assert from "node:assert/strict";
+import { join } from "node:path";
+import { homedir } from "node:os";
+import { getSkillSearchDirs } from "../preferences-skills.ts";
+
+describe("getSkillSearchDirs — Claude Code directory support", () => {
+  const cwd = "/tmp/test-project";
+
+  test("includes ~/.agents/skills/ as user-skill", () => {
+    const dirs = getSkillSearchDirs(cwd);
+    const agents = dirs.find((d) => d.dir === join(homedir(), ".agents", "skills"));
+    assert.ok(agents, "should include ~/.agents/skills/");
+    assert.equal(agents!.method, "user-skill");
+  });
+
+  test("includes .agents/skills/ as project-skill", () => {
+    const dirs = getSkillSearchDirs(cwd);
+    const projectAgents = dirs.find((d) => d.dir === join(cwd, ".agents", "skills"));
+    assert.ok(projectAgents, "should include .agents/skills/");
+    assert.equal(projectAgents!.method, "project-skill");
+  });
+
+  test("includes ~/.claude/skills/ as user-skill", () => {
+    const dirs = getSkillSearchDirs(cwd);
+    const claude = dirs.find((d) => d.dir === join(homedir(), ".claude", "skills"));
+    assert.ok(claude, "should include ~/.claude/skills/");
+    assert.equal(claude!.method, "user-skill");
+  });
+
+  test("includes .claude/skills/ as project-skill", () => {
+    const dirs = getSkillSearchDirs(cwd);
+    const projectClaude = dirs.find((d) => d.dir === join(cwd, ".claude", "skills"));
+    assert.ok(projectClaude, "should include .claude/skills/");
+    assert.equal(projectClaude!.method, "project-skill");
+  });
+
+  test("~/.agents/skills/ appears before ~/.claude/skills/ (priority order)", () => {
+    const dirs = getSkillSearchDirs(cwd);
+    const agentsIdx = dirs.findIndex((d) => d.dir === join(homedir(), ".agents", "skills"));
+    const claudeIdx = dirs.findIndex((d) => d.dir === join(homedir(), ".claude", "skills"));
+    assert.ok(agentsIdx < claudeIdx, "~/.agents/skills/ should have higher priority than ~/.claude/skills/");
+  });
+});