robustness: split jetstream into own container, add cursor persistence

Jetstream was running backgrounded in the same container as the API server,
so crashes went undetected and Docker never restarted it. Now each process
runs as a separate docker-compose service with independent restart policies.

Also adds cursor persistence to SQLite (saved every 5s) so restarts resume
from where they left off, moves event destructuring inside try/catch blocks,
and adds global unhandled error/rejection handlers for crash visibility.

CLAUDE.md

@@ -1,13 +1,19 @@
 # CLAUDE.md
 
-This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+This file provides guidance to Claude Code (claude.ai/code) when working with
+code in this repository.
 
 ## Project Overview
 
-litenote-jetstream is the backend for Remanso, a blogging platform built on the AT Protocol (Bluesky ecosystem). It has two processes:
+litenote-jetstream is the backend for Remanso, a blogging platform built on the
+AT Protocol (Bluesky ecosystem). It has two processes:
 
-1. **Jetstream listener** (`jetstream.ts`) — Subscribes to the AT Protocol firehose via `@skyware/jetstream`, filtering for `space.remanso.note` records. On create/update events, it upserts notes into a local SQLite database.
+1. **Jetstream listener** (`jetstream.ts`) — Subscribes to the AT Protocol
-2. **HTTP API server** (`server.ts`) — An Oak (Deno HTTP framework) server on port 8080 that exposes read-only endpoints to query stored notes.
+   firehose via `@skyware/jetstream`, filtering for `space.remanso.note`
+   records. On create/update events, it upserts notes into a local SQLite
+   database.
+2. **HTTP API server** (`server.ts`) — An Oak (Deno HTTP framework) server on
+   port 8080 that exposes read-only endpoints to query stored notes.
 
 Both processes share the same SQLite database (`src/data/db.ts`).
 
@@ -35,9 +41,13 @@ deno fmt
 
 ## Architecture
 
-- **Runtime**: Deno (not Bun, despite the README). Uses `deno.json` for task definitions and import maps.
+- **Runtime**: Deno (not Bun, despite the README). Uses `deno.json` for task
-- **Database**: SQLite via `https://deno.land/x/sqlite/mod.ts`. DB path is configurable via `SQLITE_PATH` env var, defaults to `notes.db`.
+  definitions and import maps.
-- **Note schema**: Defined as an AT Protocol lexicon in `lexicons/space/remanso/note.json`. Notes have `title`, optional `images` (blob refs), `publishedAt`, and `createdAt`. Primary key is `(did, rkey)`.
+- **Database**: SQLite via `https://deno.land/x/sqlite/mod.ts`. DB path is
+  configurable via `SQLITE_PATH` env var, defaults to `notes.db`.
+- **Note schema**: Defined as an AT Protocol lexicon in
+  `lexicons/space/remanso/note.json`. Notes have `title`, optional `images`
+  (blob refs), `publishedAt`, and `createdAt`. Primary key is `(did, rkey)`.
 - **API endpoints**:
   - `GET /notes?cursor=&limit=` — paginated notes (all users)
   - `GET /:did/notes?cursor=&limit=` — paginated notes for a specific DID

Dockerfile

@@ -14,4 +14,4 @@ ENV SQLITE_PATH=/data/notes.db
 
 EXPOSE 8080
 
-CMD ["sh", "-c", "deno task migrate && deno task jetstream:prod & deno task server:prod"]
+CMD ["deno", "task", "server:prod"]

README.md

@@ -1,6 +1,8 @@
 # litenote-jetstream
 
-Backend for [Remanso](https://remanso.space), a blogging platform on the AT Protocol. Listens to the Jetstream firehose for `space.remanso.note` records and serves them via a REST API.
+Backend for [Remanso](https://remanso.space), a blogging platform on the AT
+Protocol. Listens to the Jetstream firehose for `space.remanso.note` records and
+serves them via a REST API.
 
 ## Prerequisites
 
@@ -40,12 +42,12 @@ docker run -p 8080:8080 -v litenote-data:/data litenote-jetstream
 ## API
 
 | Endpoint                         | Description                        |
-|---|---|
+| -------------------------------- | ---------------------------------- |
 | `GET /notes?cursor=&limit=`      | Paginated notes from all users     |
 | `GET /:did/notes?cursor=&limit=` | Paginated notes for a specific DID |
 
 ## Environment Variables
 
 | Variable      | Default    | Description                      |
-|---|---|---|
+| ------------- | ---------- | -------------------------------- |
 | `SQLITE_PATH` | `notes.db` | Path to the SQLite database file |

docker-compose.yml

@@ -1,8 +1,17 @@
 services:
-  api:
+  jetstream:
-    # build: .
     image: docker.li212.fr/litenote:latest
     restart: unless-stopped
+    command: ["sh", "-c", "deno task migrate && deno task jetstream:prod"]
+    env_file:
+      - .env
+    volumes:
+      - ${DATA_VOLUME:-data}:/data
+
+  api:
+    image: docker.li212.fr/litenote:latest
+    restart: unless-stopped
+    command: ["deno", "task", "server:prod"]
     ports:
       - "${PORT}:8080"
     env_file:

jetstream.ts

@@ -1,48 +1,68 @@
 import { Jetstream } from "@skyware/jetstream";
-import { deleteNote, upsertNote } from "./src/data/db.ts";
+import {
+  deleteNote,
+  getCursor,
+  saveCursor,
+  upsertNote,
+} from "./src/data/db.ts";
 import { Note } from "./src/data/note.ts";
 import { log } from "./src/log.ts";
 
+globalThis.addEventListener("unhandledrejection", (e) => {
+  log("[jetstream] unhandled rejection:", e.reason);
+});
+
+globalThis.addEventListener("error", (e) => {
+  log("[jetstream] uncaught error:", e.error);
+});
+
+const cursor = getCursor();
+log(`[jetstream] starting with cursor: ${cursor ?? "none"}`);
+
 const jetstream = new Jetstream({
   wantedCollections: ["space.remanso.note"],
+  cursor: cursor ? Number(cursor) : undefined,
 });
 
 jetstream.onCreate("space.remanso.note", (event) => {
+  try {
     const { did, commit: { rkey, record } } = event;
     log(`[jetstream] creating ${did}/${rkey}...`);
     const note = record as unknown as Omit<Note, "did" | "rkey">;
-  try {
     upsertNote({ did, rkey, ...note });
     log(`[jetstream] create ${did}/${rkey}: ${note.title}`);
   } catch (error) {
-    log(`[jetstream] error on create ${did}/${rkey}:`, error);
+    log(`[jetstream] error on create:`, error);
   }
 });
 
 jetstream.onUpdate("space.remanso.note", (event) => {
+  try {
     const { did, commit: { rkey, record } } = event;
     log(`[jetstream] updating ${did}/${rkey}...`);
     const note = record as unknown as Omit<Note, "did" | "rkey">;
-  try {
     upsertNote({ did, rkey, ...note });
     log(`[jetstream] update ${did}/${rkey}: ${note.title}`);
   } catch (error) {
-    log(`[jetstream] error on update ${did}/${rkey}:`, error);
+    log(`[jetstream] error on update:`, error);
   }
 });
 
 jetstream.onDelete("space.remanso.note", (event) => {
-  const { did, commit: { rkey } } = event;
-
-    log(`[jetstream] deleting ${did}/${rkey}...`);
   try {
+    const { did, commit: { rkey } } = event;
+    log(`[jetstream] deleting ${did}/${rkey}...`);
     deleteNote({ did, rkey });
     log(`[jetstream] delete ${did}/${rkey}`);
   } catch (error) {
-    log(`[jetstream] error on delete ${did}/${rkey}:`, error);
+    log(`[jetstream] error on delete:`, error);
   }
 });
 
+jetstream.on("open", () => {
+  log("[jetstream] connected");
+});
+
 jetstream.on("close", () => {
   log("[jetstream] connection closed");
 });
@@ -52,5 +72,10 @@ jetstream.on("error", (error) => {
 });
 
 log("[jetstream] launching");
-
 jetstream.start();
+
+setInterval(() => {
+  if (jetstream.cursor) {
+    saveCursor(jetstream.cursor);
+  }
+}, 5000);

server.ts

@@ -4,7 +4,7 @@ import { log } from "./src/log.ts";
 
 const router = new Router();
 
-const PAGINATION = 20
+const PAGINATION = 20;
 
 router.get("/", (ctx) => {
   ctx.response.body = "Hello world";
@@ -48,8 +48,14 @@ const app = new Application();
 
 app.use(async (ctx, next) => {
   ctx.response.headers.set("Access-Control-Allow-Origin", "*");
-  ctx.response.headers.set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS");
+  ctx.response.headers.set(
-  ctx.response.headers.set("Access-Control-Allow-Headers", "Content-Type, Authorization");
+    "Access-Control-Allow-Methods",
+    "GET, POST, PUT, DELETE, OPTIONS",
+  );
+  ctx.response.headers.set(
+    "Access-Control-Allow-Headers",
+    "Content-Type, Authorization",
+  );
   if (ctx.request.method === "OPTIONS") {
     ctx.response.status = 204;
     return;

src/data/db.ts

@@ -57,8 +57,22 @@ export const deleteNote = ({ did, rkey }: { did: string; rkey: string }) => {
   db.query("DELETE FROM note WHERE did = ? AND rkey = ?", [did, rkey]);
 };
 
+export const getCursor = (): string | undefined => {
+  const rows = db.query<[string]>(
+    "SELECT value FROM state WHERE key = 'cursor'",
+  );
+  return rows[0]?.[0];
+};
+
+export const saveCursor = (cursor: number) => {
+  db.query(
+    "INSERT OR REPLACE INTO state (key, value) VALUES ('cursor', ?)",
+    [String(cursor)],
+  );
+};
+
 export const upsertNote = (note: Note) => {
-  const now = new Date().toISOString()  
+  const now = new Date().toISOString();
 
   db.query(
     `

src/migrations/init.ts

@@ -11,4 +11,11 @@ db.execute(`
   );
 `);
 
+db.execute(`
+  CREATE TABLE IF NOT EXISTS state (
+    key TEXT PRIMARY KEY,
+    value TEXT NOT NULL
+  );
+`);
+
 db.close();