diff --git a/lib/api/routes/dross.js b/lib/api/routes/dross.js
index 09edb21..23713e3 100644
--- a/lib/api/routes/dross.js
+++ b/lib/api/routes/dross.js
@@ -4,8 +4,14 @@ import { validate } from '../validate.js';
 import { asyncWrap } from '../errors.js';
 import { requireOwner } from '../cap.js';
 import * as settings from '../../db/repos/app_settings.js';
+import * as conversations from '../../db/repos/conversations.js';
+import * as messages from '../../db/repos/messages.js';
+import * as agents from '../../db/repos/agents.js';
+import { runAgentTurn } from '../../ai/agent/run_turn.js';
+import { personaFor } from '../../ai/personas/index.js';
 
 const DEFAULT_SETTINGS = { avatar: 'soft-eye', accent: '#a86adf', persona: '', voiceMode: 'review' };
+const COMPANION_SLUG = 'companion';
 
 export const router = Router();
 
@@ -21,3 +27,87 @@ const settingsBody = z.object({
 });
 router.put('/settings', requireOwner, validate({ body: settingsBody }),
   asyncWrap(async (req, res) => res.json(await settings.set('dross', req.body))));
+
+async function resolve() {
+  const agent = await agents.getBySlug(COMPANION_SLUG);
+  const convo = await conversations.findOrCreateGlobal(agent.id, { kind: 'user', id: null });
+  return { agent, convo };
+}
+
+router.get('/', asyncWrap(async (_req, res) => {
+  const { agent, convo } = await resolve();
+  const rows = await messages.listByConversation(convo.id);
+  res.json({
+    conversation_id: convo.id,
+    agent: { id: agent.id, slug: agent.slug, name: agent.name },
+    messages: rows
+  });
+}));
+
+const turnSchema = z.object({
+  text: z.string().min(1),
+  view: z.object({ entityType: z.string(), entityId: z.string() }).partial().nullish()
+});
+
+router.post('/turn', requireOwner, validate({ body: turnSchema }), asyncWrap(async (req, res) => {
+  const { agent, convo } = await resolve();
+  const { text, view } = req.body;
+  const cfg = await getCfg();
+  const persona = (cfg.persona && cfg.persona.trim()) ? cfg.persona : personaFor(COMPANION_SLUG);
+
+  const priorTurns = (await messages.listByConversation(convo.id)).length;
+  const resume = priorTurns > 0;
+  await messages.append(convo.id, { role: 'user', body: text });
+
+  res.writeHead(200, { 'Content-Type': 'text/event-stream', 'Cache-Control': 'no-cache', Connection: 'keep-alive' });
+  const send = (event, data) => res.write(`event: ${event}\ndata: ${JSON.stringify(data)}\n\n`);
+  const claudeExe = req.app.locals.claudeExe || process.env.CLAUDE_EXE || 'claude';
+  const companionTools = ['mcp__void__search', 'mcp__void__read', 'mcp__void__context', 'mcp__void__propose_change'];
+  const draftIds = [];
+
+  let result;
+  try {
+    result = await runAgentTurn({
+      agent, persona, registryName: undefined, toolNames: companionTools,
+      spaceId: null, view, sessionId: convo.id, resume, userText: text, claudeExe,
+      home: process.env.VOID_CLAUDE_HOME || undefined,
+      onEvent: (e) => {
+        if (e.type === 'delta') {
+          send('delta', { type: 'delta', text: e.text });
+        } else if (e.type === 'tool') {
+          send('tool', { type: 'tool', tool: e.tool, status: e.status });
+        } else if (e.type === 'tool_result') {
+          let parsed = null;
+          const tryParse = (s) => { try { return JSON.parse(s); } catch { return null; } };
+          if (typeof e.result === 'string') {
+            parsed = tryParse(e.result);
+          } else if (e.result?.structuredContent?.pending_change_id) {
+            parsed = e.result.structuredContent;
+          } else if (Array.isArray(e.result)) {
+            for (const b of e.result) {
+              const c = b?.type === 'text' && b.text ? tryParse(b.text) : null;
+              if (c?.pending_change_id) { parsed = c; break; }
+            }
+          }
+          if (parsed?.pending_change_id) {
+            draftIds.push(parsed.pending_change_id);
+            send('draft', { type: 'draft', pending_change_id: parsed.pending_change_id, summary: parsed.summary || 'a change' });
+          }
+        } else if (e.type === 'error') {
+          send('error', { type: 'error', message: e.message });
+        }
+      }
+    });
+  } catch (e) {
+    send('error', { message: String(e?.message || e) });
+    res.end();
+    return;
+  }
+
+  const assistant = await messages.append(convo.id, {
+    role: 'assistant', body: result.text, agent_id: agent.id,
+    metadata: { tool_trace: result.toolTrace, draft_ids: draftIds, usage: result.usage }
+  });
+  send('done', { assistant_message_id: assistant.id, draft_ids: draftIds, usage: result.usage });
+  res.end();
+}));
diff --git a/tests/routes/dross.test.js b/tests/routes/dross.test.js
index 160b21f..cfe255b 100644
--- a/tests/routes/dross.test.js
+++ b/tests/routes/dross.test.js
@@ -12,6 +12,26 @@ beforeAll(async () => {
   app = createApp();
 });
 
+describe('dross chat', () => {
+  it('GET /api/dross returns a global conversation + Dross agent', async () => {
+    const res = await request(app).get('/api/dross').set(owner);
+    expect(res.status).toBe(200);
+    expect(res.body.conversation_id).toBeTruthy();
+    expect(res.body.agent.slug).toBe('companion');
+    expect(Array.isArray(res.body.messages)).toBe(true);
+  });
+
+  it('POST /api/dross/turn rejects empty text (400)', async () => {
+    const res = await request(app).post('/api/dross/turn').set(owner).send({ text: '' });
+    expect(res.status).toBe(400);
+  });
+
+  it('GET /api/dross without token is 401', async () => {
+    const res = await request(app).get('/api/dross');
+    expect(res.status).toBe(401);
+  });
+});
+
 describe('dross settings', () => {
   it('GET /api/dross/settings returns defaults', async () => {
     const res = await request(app).get('/api/dross/settings').set(owner);