diff --git a/src/cli/commands/decision.ts b/src/cli/commands/decision.ts
new file mode 100644
index 0000000..6ebe04f
--- /dev/null
+++ b/src/cli/commands/decision.ts
@@ -0,0 +1,55 @@
+import { input } from '@inquirer/prompts';
+import { join } from 'path';
+import { getEntityDir } from '../../core/paths.js';
+import { getNextId } from '../../core/counter.js';
+import { readEntity, writeEntity, listEntities } from '../../core/files.js';
+import { DecisionSchema, type Decision } from '../../core/schema.js';
+import { Index } from '../../core/index.js';
+
+export async function decisionCreate(cwd: string, options: Partial<Decision> = {}): Promise<void> {
+  const title = options.title ?? await input({ message: 'Decision title:' });
+  const context = options.context ?? await input({ message: 'Context:' });
+  const decision = options.decision ?? await input({ message: 'Decision:' });
+
+  const now = new Date().toISOString();
+  const record: Decision = DecisionSchema.parse({
+    id: getNextId(cwd, 'decision'),
+    title,
+    context,
+    decision,
+    createdAt: now,
+    updatedAt: now,
+  });
+
+  const filePath = join(getEntityDir(cwd, 'decisions'), `${record.id}.md`);
+  writeEntity(filePath, record, `# ${record.title}\n\n## Decision\n\n${record.decision}\n\n## Context\n\n${record.context}`);
+
+  const index = new Index(cwd);
+  index.upsert({
+    id: record.id,
+    type: 'decision',
+    title: record.title,
+    content: `${record.context} ${record.decision}`,
+    filePath,
+    createdAt: record.createdAt,
+    updatedAt: record.updatedAt,
+  });
+  index.close();
+
+  console.log(`Decision recorded: ${record.id}`);
+}
+
+export function decisionList(cwd: string): void {
+  const index = new Index(cwd);
+  const decisions = index.list('decision');
+  index.close();
+
+  if (decisions.length === 0) {
+    console.log('No decisions found.');
+    return;
+  }
+
+  for (const d of decisions) {
+    console.log(`${d.id}: ${d.title}`);
+  }
+}