diff --git a/test/helpers/touchfiles.ts b/test/helpers/touchfiles.ts
index 981459b2..b475daad 100644
--- a/test/helpers/touchfiles.ts
+++ b/test/helpers/touchfiles.ts
@@ -95,6 +95,9 @@ export const E2E_TOUCHFILES: Record<string, string[]> = {
   'cso-diff-mode':    ['cso/**'],
   'cso-infra-scope':  ['cso/**'],
 
+  // Learnings
+  'learnings-show': ['learn/**', 'bin/gstack-learnings-search', 'bin/gstack-learnings-log', 'scripts/resolvers/learnings.ts'],
+
   // Document-release
   'document-release': ['document-release/**'],
 
@@ -238,6 +241,9 @@ export const E2E_TIERS: Record<string, 'gate' | 'periodic'> = {
   'cso-diff-mode': 'gate',
   'cso-infra-scope': 'periodic',
 
+  // Learnings — gate (functional guardrail: seeded learnings must appear)
+  'learnings-show': 'gate',
+
   // Document-release — gate (CHANGELOG guardrail)
   'document-release': 'gate',
 
diff --git a/test/skill-e2e-learnings.test.ts b/test/skill-e2e-learnings.test.ts
new file mode 100644
index 00000000..dfd18513
--- /dev/null
+++ b/test/skill-e2e-learnings.test.ts
@@ -0,0 +1,132 @@
+import { describe, test, expect, beforeAll, afterAll } from 'bun:test';
+import { runSkillTest } from './helpers/session-runner';
+import {
+  ROOT, runId, evalsEnabled,
+  describeIfSelected, testConcurrentIfSelected,
+  copyDirSync, logCost, recordE2E,
+  createEvalCollector, finalizeEvalCollector,
+} from './helpers/e2e-helpers';
+import { spawnSync } from 'child_process';
+import * as fs from 'fs';
+import * as path from 'path';
+import * as os from 'os';
+
+const evalCollector = createEvalCollector('e2e-learnings');
+
+// --- Learnings E2E: seed learnings, run /learn, verify output ---
+
+describeIfSelected('Learnings E2E', ['learnings-show'], () => {
+  let workDir: string;
+  let gstackHome: string;
+
+  beforeAll(() => {
+    workDir = fs.mkdtempSync(path.join(os.tmpdir(), 'skill-e2e-learnings-'));
+    gstackHome = path.join(workDir, '.gstack-home');
+
+    // Init git repo
+    const run = (cmd: string, args: string[]) =>
+      spawnSync(cmd, args, { cwd: workDir, stdio: 'pipe', timeout: 5000 });
+    run('git', ['init', '-b', 'main']);
+    run('git', ['config', 'user.email', 'test@test.com']);
+    run('git', ['config', 'user.name', 'Test']);
+    fs.writeFileSync(path.join(workDir, 'app.ts'), 'console.log("hello");\n');
+    run('git', ['add', '.']);
+    run('git', ['commit', '-m', 'initial']);
+
+    // Copy the /learn skill
+    copyDirSync(path.join(ROOT, 'learn'), path.join(workDir, 'learn'));
+
+    // Copy bin scripts needed by /learn
+    const binDir = path.join(workDir, 'bin');
+    fs.mkdirSync(binDir, { recursive: true });
+    for (const script of ['gstack-learnings-search', 'gstack-learnings-log', 'gstack-slug']) {
+      fs.copyFileSync(path.join(ROOT, 'bin', script), path.join(binDir, script));
+      fs.chmodSync(path.join(binDir, script), 0o755);
+    }
+
+    // Seed learnings JSONL with 3 entries of different types
+    const slug = 'test-project';
+    const projectDir = path.join(gstackHome, 'projects', slug);
+    fs.mkdirSync(projectDir, { recursive: true });
+
+    const learnings = [
+      {
+        skill: 'review', type: 'pattern', key: 'n-plus-one-queries',
+        insight: 'ActiveRecord associations in loops cause N+1 queries. Always use includes/preload.',
+        confidence: 9, source: 'observed', ts: new Date().toISOString(),
+        files: ['app/models/user.rb'],
+      },
+      {
+        skill: 'investigate', type: 'pitfall', key: 'stale-cache-after-deploy',
+        insight: 'Redis cache not invalidated on deploy causes stale data for 5 minutes.',
+        confidence: 7, source: 'observed', ts: new Date().toISOString(),
+        files: ['config/redis.yml'],
+      },
+      {
+        skill: 'ship', type: 'preference', key: 'always-run-rubocop',
+        insight: 'User wants rubocop to run before every commit, no exceptions.',
+        confidence: 10, source: 'user-stated', ts: new Date().toISOString(),
+      },
+    ];
+
+    fs.writeFileSync(
+      path.join(projectDir, 'learnings.jsonl'),
+      learnings.map(l => JSON.stringify(l)).join('\n') + '\n',
+    );
+  });
+
+  afterAll(() => {
+    try { fs.rmSync(workDir, { recursive: true, force: true }); } catch {}
+    finalizeEvalCollector(evalCollector);
+  });
+
+  testConcurrentIfSelected('learnings-show', async () => {
+    const result = await runSkillTest({
+      prompt: `Read the file learn/SKILL.md for the /learn skill instructions.
+
+Run the /learn command (no arguments — show recent learnings).
+
+IMPORTANT:
+- Use GSTACK_HOME="${gstackHome}" as an environment variable when running bin scripts.
+- The bin scripts are at ./bin/ (relative to this directory), not at ~/.claude/skills/gstack/bin/.
+  Replace any references to ~/.claude/skills/gstack/bin/ with ./bin/ when running commands.
+- Replace any references to ~/.claude/skills/gstack/bin/gstack-slug with ./bin/gstack-slug.
+- Do NOT use AskUserQuestion.
+- Do NOT implement code changes.
+- Just show the learnings and summarize what you found.`,
+      workingDirectory: workDir,
+      maxTurns: 15,
+      allowedTools: ['Bash', 'Read', 'Write', 'Edit', 'Grep', 'Glob'],
+      timeout: 120_000,
+      testName: 'learnings-show',
+      runId,
+    });
+
+    logCost('/learn show', result);
+
+    const output = result.output.toLowerCase();
+
+    // The agent should have found and displayed the seeded learnings
+    const mentionsNPlusOne = output.includes('n-plus-one') || output.includes('n+1');
+    const mentionsCache = output.includes('stale') || output.includes('cache');
+    const mentionsRubocop = output.includes('rubocop');
+
+    // At least 2 of 3 learnings should appear in the output
+    const foundCount = [mentionsNPlusOne, mentionsCache, mentionsRubocop].filter(Boolean).length;
+
+    const exitOk = ['success', 'error_max_turns'].includes(result.exitReason);
+
+    recordE2E(evalCollector, '/learn', 'Learnings show E2E', result, {
+      passed: exitOk && foundCount >= 2,
+    });
+
+    expect(exitOk).toBe(true);
+    expect(foundCount).toBeGreaterThanOrEqual(2);
+
+    if (foundCount === 3) {
+      console.log('All 3 seeded learnings found in output');
+    } else {
+      console.warn(`Only ${foundCount}/3 learnings found (N+1: ${mentionsNPlusOne}, cache: ${mentionsCache}, rubocop: ${mentionsRubocop})`);
+    }
+  }, 180_000);
+});