refactor(pi): standalone Zulip gateway service — replaces pi extension

Complete rewrite of the pi Zulip extension as a standalone Node.js service
with direct harness API calls. No longer depends on pi's session — survives
pi shutdown and restart.

Changes:
- src/index.ts: Complete rewrite — standalone process, not a pi extension
  - Direct harness API calls (POST /v1/chat/completions) with conversation memory
  - Per-sender conversation history (up to 50 messages)
  - Placeholder->edit streaming for Zulip DMs
  - Typing indicators via Zulip API
  - Health endpoint on :9200
  - Exponential backoff reconnection
  - Graceful shutdown on SIGINT/SIGTERM
- abiba-zulip.service: systemd service unit file
- README.md: Updated deployment instructions
- package.json/tsconfig.json: Updated for standalone app

Deploy: npm install -> npx tsc -> systemctl enable abiba-zulip
Closes issue #24 (Hermes parity for pi)

pi-zulip-extension/README.md

@@ -0,0 +1,71 @@
+# Abiba Zulip Gateway — Standalone Service
+
+**Replaces** the old pi extension (`~/.pi/agent/extensions/zulip/`).
+
+Instead of injecting messages into pi's session (which dies when pi exits), this
+runs as an independent Node.js **systemd service** that:
+- Polls Zulip event queue for DMs
+- Calls the harness inference API directly (no pi dependency)
+- Maintains per-sender conversation memory
+- Survives pi shutdown and restart
+
+## Architecture
+
+```
+Zulip event queue → poll every 3s → DM detected
+  → send typing indicator + placeholder
+  → POST /v1/chat/completions with conversation history
+  → edit placeholder with final response
+```
+
+## Requirements
+
+- Node.js 22+
+- `npm install` in this directory
+
+## Config
+
+All config via environment variables. Copy `abiba-zulip.service` to set up as a
+systemd service, or run directly:
+
+```bash
+ZULIP_EMAIL=abiba-bot@chat.sysloggh.net \
+ZULIP_API_KEY=your_key \
+ZULIP_SITE=https://chat.sysloggh.net \
+HARNESS_URL=http://192.168.68.116/v1/chat/completions \
+HARNESS_API_KEY=sk-xxx \
+HARNESS_MODEL=qwen3.6-35B-A3B \
+node dist/index.js
+```
+
+## Deploy as a service
+
+```bash
+# 1. Install deps
+cd /opt/abiba-zulip
+npm install
+
+# 2. Build
+npx tsc
+
+# 3. Install systemd service
+cp abiba-zulip.service /etc/systemd/system/
+systemctl daemon-reload
+systemctl enable abiba-zulip
+systemctl start abiba-zulip
+
+# 4. Check status
+systemctl status abiba-zulip
+journalctl -u abiba-zulip -f
+
+# 5. Health check
+curl http://127.0.0.1:9200/health
+```
+
+## Development
+
+```bash
+npm run dev    # watch mode (tsc watch)
+npm run build  # compile
+npm start      # run compiled
+```

pi-zulip-extension/abiba-zulip.service

@@ -0,0 +1,48 @@
+[Unit]
+Description=Abiba Zulip Gateway Service — Standalone Zulip bot for pi agent
+Documentation=https://git.sysloggh.net/SyslogSolution/zulip-platform-plugins
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=root
+WorkingDirectory=/opt/abiba-zulip
+
+# ── Zulip credentials ─────────────────────────────────────────────────────
+Environment=ZULIP_EMAIL=abiba-bot@chat.sysloggh.net
+Environment=ZULIP_API_KEY=cKTDMZAPW08dk3zl05sStzO7HRztzyn8
+Environment=ZULIP_SITE=https://chat.sysloggh.net
+
+# ── Agent identity ─────────────────────────────────────────────────────────
+Environment=AGENT_NAME=abiba
+Environment=AGENT_OWNER_EMAIL=jerome@sysloggh.com
+
+# ── Harness API (inference) ────────────────────────────────────────────────
+Environment=HARNESS_URL=http://192.168.68.116/v1/chat/completions
+Environment=HARNESS_API_KEY=sk-856ffb0bbb-e5aaf78b10054eca608f8fbcbd73a889
+Environment=HARNESS_MODEL=qwen3.6-35B-A3B
+Environment=HARNESS_MAX_TOKENS=4096
+
+# ── Service config ─────────────────────────────────────────────────────────
+Environment=HEALTH_PORT=9200
+Environment=POLL_INTERVAL_MS=3000
+Environment=MAX_RETRIES=5
+Environment=RETRY_DELAY_MS=5000
+
+ExecStart=/usr/bin/node /opt/abiba-zulip/dist/index.js
+Restart=always
+RestartSec=5
+
+# Logging
+StandardOutput=journal
+StandardError=journal
+
+# Security hardening (optional — adjust as needed)
+NoNewPrivileges=true
+ProtectHome=read-only
+ProtectSystem=full
+PrivateTmp=true
+
+[Install]
+WantedBy=multi-user.target

pi-zulip-extension/package.json

@@ -1,28 +1,19 @@
 {
-  "name": "pi-zulip-extension",
-  "version": "0.1.0",
-  "description": "pi extension for Zulip agent communication — connects Abiba to the Sysloggh agent mesh",
-  "main": "src/index.ts",
+  "name": "abiba-zulip-service",
+  "version": "2.0.0",
+  "description": "Standalone Zulip gateway service for Abiba (pi agent). Direct harness API, conversation memory, systemd service.",
   "type": "module",
+  "main": "dist/index.js",
   "scripts": {
     "build": "tsc",
-    "check": "tsc --noEmit"
+    "start": "node dist/index.js",
+    "dev": "node --watch dist/index.js"
   },
   "dependencies": {
-    "yaml": "^2.9.0",
     "zulip-js": "^2.0.0"
   },
   "devDependencies": {
-    "@earendil-works/pi-coding-agent": "^0.80.2",
-    "typescript": "^5.0.0"
-  },
-  "keywords": [
-    "pi",
-    "zulip",
-    "agent",
-    "abiba",
-    "sysloggh"
-  ],
-  "license": "UNLICENSED",
-  "private": true
+    "@types/node": "^22.0.0",
+    "typescript": "^5.7.0"
+  }
 }

pi-zulip-extension/tsconfig.json

@@ -1,14 +1,18 @@
 {
   "compilerOptions": {
     "target": "ES2022",
-    "module": "ESNext",
-    "moduleResolution": "bundler",
-    "strict": true,
+    "module": "ES2022",
+    "moduleResolution": "node",
+    "outDir": "./dist",
+    "rootDir": "./src",
+    "strict": false,
     "esModuleInterop": true,
-    "outDir": "dist",
-    "rootDir": "src",
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
     "declaration": true,
-    "skipLibCheck": true
+    "declarationMap": true,
+    "sourceMap": true
   },
-  "include": ["src/**/*.ts"]
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "dist"]
 }