diff --git a/src/app/.well-known/agent.json/route.ts b/src/app/.well-known/agent.json/route.ts
index d0a9ba034c..e36ab63607 100644
--- a/src/app/.well-known/agent.json/route.ts
+++ b/src/app/.well-known/agent.json/route.ts
@@ -102,6 +102,15 @@ export async function GET() {
           "Summarize active rate limits and lockouts",
         ],
       },
+      {
+        id: "list-capabilities",
+        name: "List Capabilities",
+        description:
+          "Returns the full catalog of 42 OmniRoute agent skills (22 API + 20 CLI) " +
+          "with raw URLs for the SKILL.md docs.",
+        tags: ["discovery", "capabilities"],
+        examples: ["What can you do?", "List your skills", "Show capabilities"],
+      },
     ],
     authentication: {
       schemes: ["api-key"],
diff --git a/src/lib/a2a/skills/listCapabilities.ts b/src/lib/a2a/skills/listCapabilities.ts
new file mode 100644
index 0000000000..7520a6d3b5
--- /dev/null
+++ b/src/lib/a2a/skills/listCapabilities.ts
@@ -0,0 +1,72 @@
+/**
+ * A2A Skill: List Capabilities
+ *
+ * Returns the full catalog of 42 OmniRoute agent skills (22 API + 20 CLI)
+ * as a markdown table with raw SKILL.md URLs for orchestrating agents.
+ */
+
+import type { A2ATask, TaskArtifact } from "../taskManager";
+import { getCatalog, computeCoverage } from "@/lib/agentSkills/catalog";
+import type { AgentSkill } from "@/lib/agentSkills/types";
+
+export interface ListCapabilitiesResult {
+  artifacts: TaskArtifact[];
+  metadata: {
+    coverage: {
+      api: { have: number; total: 22 };
+      cli: { have: number; total: 20 };
+    };
+    totalSkills: 42;
+    generatedAt: string;
+    source: "agent-skills-catalog";
+  };
+}
+
+function buildMarkdownTable(skills: AgentSkill[]): string {
+  const header = "| ID | Name | Category | Area | Endpoints/Commands | Raw URL |";
+  const separator = "| --- | --- | --- | --- | --- | --- |";
+
+  const rows = skills.map((skill) => {
+    const endpointsOrCommands =
+      skill.category === "api"
+        ? (skill.endpoints ?? []).join(", ") || "—"
+        : (skill.cliCommands ?? []).join(", ") || "—";
+
+    return `| ${skill.id} | ${skill.name} | ${skill.category} | ${skill.area} | ${endpointsOrCommands} | ${skill.rawUrl} |`;
+  });
+
+  return [header, separator, ...rows].join("\n");
+}
+
+export async function executeListCapabilities(_task: A2ATask): Promise<ListCapabilitiesResult> {
+  const catalog = getCatalog();
+  const coverage = computeCoverage();
+
+  const table = buildMarkdownTable(catalog);
+
+  const content = [
+    `# OmniRoute Agent Skills Catalog`,
+    ``,
+    `Total: ${catalog.length} skills (${coverage.api.total} API + ${coverage.cli.total} CLI)`,
+    ``,
+    table,
+  ].join("\n");
+
+  return {
+    artifacts: [
+      {
+        type: "text",
+        content,
+      },
+    ],
+    metadata: {
+      coverage: {
+        api: { have: coverage.api.have, total: 22 },
+        cli: { have: coverage.cli.have, total: 20 },
+      },
+      totalSkills: 42,
+      generatedAt: coverage.generatedAt,
+      source: "agent-skills-catalog",
+    },
+  };
+}
diff --git a/src/lib/a2a/taskExecution.ts b/src/lib/a2a/taskExecution.ts
index 39851955ac..421a36bb95 100644
--- a/src/lib/a2a/taskExecution.ts
+++ b/src/lib/a2a/taskExecution.ts
@@ -37,6 +37,10 @@ export const A2A_SKILL_HANDLERS: Record<string, A2ASkillHandler> = {
     const skillModule = await import("./skills/healthReport");
     return skillModule.executeHealthReport(task);
   },
+  "list-capabilities": async (task) => {
+    const skillModule = await import("./skills/listCapabilities");
+    return skillModule.executeListCapabilities(task);
+  },
 };
 
 export async function executeA2ATaskWithState(
diff --git a/tests/unit/agent-card-route.test.ts b/tests/unit/agent-card-route.test.ts
new file mode 100644
index 0000000000..2dc714eeac
--- /dev/null
+++ b/tests/unit/agent-card-route.test.ts
@@ -0,0 +1,84 @@
+/**
+ * Unit tests for GET /.well-known/agent.json (Agent Card endpoint).
+ *
+ * Verifies:
+ *  - Response includes 6 skills after the list-capabilities addition
+ *  - list-capabilities entry has the required id, tags, and examples
+ */
+
+import test from "node:test";
+import assert from "node:assert/strict";
+
+const { GET } = await import("../../src/app/.well-known/agent.json/route.js");
+
+interface AgentSkillEntry {
+  id: string;
+  name: string;
+  description: string;
+  tags: string[];
+  examples: string[];
+}
+
+interface AgentCard {
+  name: string;
+  version: string;
+  skills: AgentSkillEntry[];
+}
+
+test("GET /.well-known/agent.json returns 6 skills", async () => {
+  const response = await GET();
+  assert.equal(response.status, 200, "Expected HTTP 200");
+
+  const body = (await response.json()) as AgentCard;
+  assert.ok(Array.isArray(body.skills), "skills is an array");
+  assert.equal(body.skills.length, 6, "Expected exactly 6 skills");
+});
+
+test("Agent Card includes list-capabilities skill entry", async () => {
+  const response = await GET();
+  const body = (await response.json()) as AgentCard;
+
+  const skill = body.skills.find((s) => s.id === "list-capabilities");
+  assert.ok(skill, "list-capabilities skill must be present in Agent Card");
+});
+
+test("list-capabilities entry has required tags [discovery, capabilities]", async () => {
+  const response = await GET();
+  const body = (await response.json()) as AgentCard;
+
+  const skill = body.skills.find((s) => s.id === "list-capabilities");
+  assert.ok(skill, "list-capabilities skill must be present");
+  assert.ok(Array.isArray(skill.tags), "tags is an array");
+  assert.ok(skill.tags.includes("discovery"), "tags includes 'discovery'");
+  assert.ok(skill.tags.includes("capabilities"), "tags includes 'capabilities'");
+});
+
+test("list-capabilities entry has at least one example question", async () => {
+  const response = await GET();
+  const body = (await response.json()) as AgentCard;
+
+  const skill = body.skills.find((s) => s.id === "list-capabilities");
+  assert.ok(skill, "list-capabilities skill must be present");
+  assert.ok(Array.isArray(skill.examples), "examples is an array");
+  assert.ok(skill.examples.length > 0, "examples has at least one entry");
+});
+
+test("Agent Card includes all 5 original skills", async () => {
+  const response = await GET();
+  const body = (await response.json()) as AgentCard;
+
+  const originalIds = [
+    "smart-routing",
+    "quota-management",
+    "provider-discovery",
+    "cost-analysis",
+    "health-report",
+  ];
+
+  for (const id of originalIds) {
+    assert.ok(
+      body.skills.some((s) => s.id === id),
+      `Original skill '${id}' must be present in Agent Card`,
+    );
+  }
+});
diff --git a/tests/unit/listCapabilities-a2a.test.ts b/tests/unit/listCapabilities-a2a.test.ts
new file mode 100644
index 0000000000..16892070f6
--- /dev/null
+++ b/tests/unit/listCapabilities-a2a.test.ts
@@ -0,0 +1,83 @@
+/**
+ * Unit tests for the A2A list-capabilities skill.
+ *
+ * Verifies:
+ *  - Return shape matches §3.7 contract
+ *  - Markdown table contains all 42 skill IDs
+ *  - Coverage bounds are within declared totals
+ *  - metadata.source === "agent-skills-catalog"
+ *  - metadata.generatedAt is an ISO datetime string
+ */
+
+import assert from "node:assert/strict";
+import { test } from "node:test";
+import type { A2ATask } from "../../src/lib/a2a/taskManager.js";
+import { executeListCapabilities } from "../../src/lib/a2a/skills/listCapabilities.js";
+import { API_SKILL_IDS, CLI_SKILL_IDS } from "../../src/lib/agentSkills/catalog.js";
+
+// Minimal stub — executeListCapabilities only receives the task arg but does not use it
+const stubTask = {} as A2ATask;
+
+test("executeListCapabilities returns shape matching §3.7 contract", async () => {
+  const result = await executeListCapabilities(stubTask);
+
+  // artifacts array with exactly 1 text artifact
+  assert.ok(Array.isArray(result.artifacts), "artifacts is an array");
+  assert.equal(result.artifacts.length, 1, "exactly 1 artifact");
+  assert.equal(result.artifacts[0].type, "text", "artifact type is 'text'");
+  assert.ok(typeof result.artifacts[0].content === "string", "artifact content is a string");
+
+  // metadata shape
+  const { metadata } = result;
+  assert.ok(metadata, "metadata exists");
+  assert.equal(metadata.source, "agent-skills-catalog", "metadata.source matches");
+  assert.equal(metadata.totalSkills, 42, "metadata.totalSkills === 42");
+  assert.ok(metadata.coverage, "metadata.coverage exists");
+  assert.ok(metadata.coverage.api, "metadata.coverage.api exists");
+  assert.ok(metadata.coverage.cli, "metadata.coverage.cli exists");
+  assert.equal(metadata.coverage.api.total, 22, "api.total === 22");
+  assert.equal(metadata.coverage.cli.total, 20, "cli.total === 20");
+});
+
+test("executeListCapabilities markdown table contains all 42 skill IDs", async () => {
+  const result = await executeListCapabilities(stubTask);
+  const content = result.artifacts[0].content;
+
+  const allIds = [...API_SKILL_IDS, ...CLI_SKILL_IDS] as string[];
+  assert.equal(allIds.length, 42, "catalog declares 42 skill IDs");
+
+  for (const id of allIds) {
+    assert.ok(content.includes(id), `Markdown table missing skill ID: ${id}`);
+  }
+});
+
+test("metadata.coverage.api.have is within [0, 22]", async () => {
+  const result = await executeListCapabilities(stubTask);
+  const { api } = result.metadata.coverage;
+  assert.ok(api.have >= 0, "api.have >= 0");
+  assert.ok(api.have <= 22, "api.have <= 22");
+});
+
+test("metadata.coverage.cli.have is within [0, 20]", async () => {
+  const result = await executeListCapabilities(stubTask);
+  const { cli } = result.metadata.coverage;
+  assert.ok(cli.have >= 0, "cli.have >= 0");
+  assert.ok(cli.have <= 20, "cli.have <= 20");
+});
+
+test("metadata.generatedAt is a valid ISO datetime", async () => {
+  const result = await executeListCapabilities(stubTask);
+  const { generatedAt } = result.metadata;
+  assert.ok(typeof generatedAt === "string", "generatedAt is a string");
+  const parsed = new Date(generatedAt);
+  assert.ok(!isNaN(parsed.getTime()), `generatedAt is not a valid date: ${generatedAt}`);
+  assert.ok(generatedAt.includes("T"), "generatedAt contains 'T' (ISO format)");
+});
+
+test("list-capabilities is registered in A2A_SKILL_HANDLERS", async () => {
+  const { A2A_SKILL_HANDLERS } = await import("../../src/lib/a2a/taskExecution.js");
+  assert.ok(
+    "list-capabilities" in A2A_SKILL_HANDLERS,
+    "list-capabilities must be in A2A_SKILL_HANDLERS",
+  );
+});