[examples] Bluesky/ATProto sample integration (input stream, rules)

AGENTS.md

@@ -12,14 +12,16 @@ Top-level modules:
 - `osprey_coordinator/` — Rust gRPC coordinator (tokio, tonic, etcd, rdkafka). Rust code belongs here.
 - `proto/osprey/rpc/` — protobuf source of truth for `osprey_rpc` and `osprey_coordinator` types.
 - `example_plugins/` — reference plugins (UDFs, output sinks, labels service) using the pluggy-based plugin system. Do not add production code here.
+- `example_atproto_plugins/` — reference plugin demonstrating a custom input stream that consumes the Bluesky firehose. Stack `docker-compose.atproto.yaml` on top of the main compose file (or use `./run-atproto.sh`) to run Osprey against live ATProto traffic. Do not add production code here.
 - `example_rules/` — sample SML rules and YAML config.
+- `example_atproto_rules/` — sample SML rules paired with `example_atproto_plugins/`.
 
 Reference files: `docs/DEVELOPMENT.md` (setup), `example_plugins/src/register_plugins.py` (plugin patterns), `example_plugins/src/services/labels_service.py` (labels service example).
 
 ## Design
 
 - API: gRPC between `osprey_coordinator` and workers; HTTP/Flask for `osprey-ui-api` (port 5004); protobuf definitions under `proto/osprey/rpc/` are authoritative.
-- Rules: SML (Osprey's rule language) with user-defined functions registered via pluggy hooks (`@hookimpl_osprey`): `register_udfs`, `register_output_sinks`, `register_labels_service_or_provider`.
+- Rules: SML (Osprey's rule language) with user-defined functions registered via pluggy hooks (`@hookimpl_osprey`): `register_udfs`, `register_output_sinks`, `register_labels_service_or_provider`, `register_input_stream` (custom event source; see `example_atproto_plugins/`).
 - Data model conventions: Pydantic for models, SQLAlchemy for persistence (versions pinned in `pyproject.toml`).
 
 ## Build and run

CHANGELOG.md

@@ -21,6 +21,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Add `ParseInt` UDF — converts a numeric string to an integer ([#190](https://github.com/roostorg/osprey/pull/190) by [@bealsbe](https://github.com/bealsbe))
 - Add `StringSlice` UDF which extracts a substring by index range ([#189](https://github.com/roostorg/osprey/pull/189) by [@bealsbe](https://github.com/bealsbe))
 - Add `InExperiment` UDF which checks if an entity is in an experiment ([#203](https://github.com/roostorg/osprey/pull/203) by [@bealsbe](https://github.com/bealsbe))
+- Add ATProto JetStream example plugins and rules ([#236](https://github.com/roostorg/osprey/pull/236) by [@haileyok](https://github.com/haileyok))
 
 ### 🐛 Bug fixes
 - Default to selecting all for event stream ([#194](https://github.com/roostorg/osprey/pull/194) by [@chimosky](https://github.com/chimosky))

docker-compose.atproto.yaml

@@ -0,0 +1,21 @@
+# Override that swaps the synthetic Kafka producer for the live Bluesky JetStream
+# firehose, via the example_atproto_plugins package. Stack on top of the main
+# compose file:
+#
+#   docker compose -f docker-compose.yaml -f docker-compose.atproto.yaml up
+#
+# Or use the convenience wrapper: ./run-atproto.sh
+services:
+  osprey-worker:
+    environment:
+      OSPREY_INPUT_STREAM_SOURCE: plugin
+      OSPREY_RULES_PATH: ./example_atproto_rules
+    volumes:
+      - ./example_atproto_rules:/osprey/example_atproto_rules
+      - ./example_atproto_plugins:/osprey/example_atproto_plugins
+
+  osprey-ui-api:
+    environment:
+      OSPREY_RULES_PATH: /osprey/example_atproto_rules
+    volumes:
+      - ./example_atproto_rules:/osprey/example_atproto_rules

example_atproto_plugins/README.md

@@ -0,0 +1,72 @@
+# example_atproto_plugins
+
+A sample Osprey plugin that consumes ATProto's [JetStream](https://docs.bsky.app/blog/jetstream) as the input event source. It gives you:
+
+- a `register_input_stream` hook implementation that subscribes to JetStream over WebSocket and yields Osprey `Action`s with the JetStream JSON event passed through as-is,
+- realistic per-second event volume from the live Bluesky network, which is useful for load and soak testing changes that the synthetic 1-event/second producer doesn't exercise,
+- a companion `example_atproto_rules/` tree showing how to organize rules against ATProto event shapes, with file structure modeled on [haileyok/atproto-ruleset](https://github.com/haileyok/atproto-ruleset).
+
+## Running
+
+From the repo root:
+
+```sh
+./run-atproto.sh
+```
+
+This brings up the full Osprey local stack (Druid, Postgres, MinIO, Kafka) along with a JetStream websocket override, and swaps the worker's input source from Kafka to the JetStream plugin, pointing it at `example_atproto_rules` instead of `example_rules`. First-run startup takes a few minutes.
+
+## Configuration
+
+| Env var | Default | Description |
+| --- | --- | --- |
+| `OSPREY_INPUT_STREAM_SOURCE` | (must be) `plugin` | Selects the plugin-provided stream. |
+| `OSPREY_JETSTREAM_ENDPOINT` | `wss://jetstream2.us-west.bsky.network/subscribe` | JetStream WebSocket URL. |
+| `OSPREY_JETSTREAM_WANTED_COLLECTIONS` | `app.bsky.feed.post,app.bsky.feed.like,app.bsky.feed.repost,app.bsky.graph.follow,app.bsky.actor.profile` | Comma-separated collections to subscribe to (server-side filter). |
+
+## Action shape
+
+The JetStream JSON event is passed through unchanged as the Action's `data` dict, so rules read JetStream-native paths directly. `action_name` is `<operation>_<short>` for commit events (`create_post`, `delete_like`, `update_profile`, …) using the short names defined in `COLLECTION_NAMES`, or `identity` for identity events.
+
+### Commit events (e.g. `create_post`, `delete_like`)
+
+```
+{
+  "did": "did:plc:...",
+  "time_us": 1714500000000000,
+  "kind": "commit",
+  "commit": {
+    "rev": "...",
+    "operation": "create" | "update" | "delete",
+    "collection": "app.bsky.feed.post",
+    "rkey": "...",
+    "cid": "...",
+    "record": { ... raw ATProto record ... }
+  }
+}
+```
+
+### Identity events (`action_name='identity'`)
+
+```
+{
+  "did": "did:plc:...",
+  "time_us": ...,
+  "kind": "identity",
+  "identity": {"did": "...", "handle": "...", "seq": ..., "time": "..."}
+}
+```
+
+Account events, commits for collections not in `COLLECTION_NAMES`, and commits with operations other than `create` / `update` / `delete` are skipped.
+
+### UI default features
+
+`example_atproto_rules/config/ui_config.yaml` declares the per-action default features the Osprey UI surfaces in the event stream — e.g. `PostText` for `create_post`, `IdentityHandle` for `identity`, `Subject` for like / repost / follow events. Add new entries there to expose more fields without touching rule code.
+
+`action_id` is minted from `snowflake-id-worker` in batches of 250. The plugin therefore needs `SNOWFLAKE_API_ENDPOINT` to be set (the local docker-compose stack provides it).
+
+## Caveats
+
+- **Not production-ready.** No durable cursor on process restart, no zstd compression, no DID-level filtering. Good for sample / load-testing purposes; not a drop-in for a real ATProto deployment.
+- **No event enrichment.** JetStream only carries what's in the commit itself; rulesets that depend on handle / profile / account age (such as much of [atproto-ruleset](https://github.com/haileyok/atproto-ruleset)) are fed by a separate enrichment pipeline, not JetStream directly. This plugin emits JetStream-native paths ($.did, $.commit.collection, etc.); enrichment-fed rulesets would need an enrichment service in front of this one or a different plugin.
+- **No application-level keepalive.** Connection health is monitored via socket read timeout (30s). A stalled connection will be detected and trigger reconnection.

example_atproto_plugins/pyproject.toml

@@ -0,0 +1,18 @@
+[project]
+name = "example_atproto_plugins"
+version = "0.1.0"
+description = "Example Osprey plugin that consumes Bluesky's ATProto JetStream firehose"
+requires-python = ">=3.11"
+dependencies = [
+    "pluggy==1.5.0",
+    "websocket-client==1.8.0",
+]
+
+[tool.setuptools]
+package-dir = {"" = "src"}
+
+[tool.setuptools.packages.find]
+where = ["src"]
+
+[project.entry-points.osprey_plugin]
+atproto_plugins = "atproto_plugin.register_plugins"

example_atproto_plugins/src/atproto_plugin/jetstream_input_stream.py

@@ -0,0 +1,131 @@
+import json
+import time
+from datetime import datetime, timezone
+from typing import Any, Dict, Iterator, List, Optional
+from urllib.parse import urlencode
+
+import sentry_sdk
+import websocket
+from osprey.engine.executor.execution_context import Action
+from osprey.worker.lib.instruments import metrics
+from osprey.worker.lib.osprey_shared.logging import get_logger
+from osprey.worker.lib.snowflake import generate_snowflake_batch
+from osprey.worker.sinks.sink.input_stream import BaseInputStream
+from osprey.worker.sinks.utils.acking_contexts import BaseAckingContext, NoopAckingContext
+from websocket import WebSocketConnectionClosedException
+
+logger = get_logger()
+
+
+DEFAULT_ENDPOINT = 'wss://jetstream2.us-west.bsky.network/subscribe'
+COLLECTION_NAMES = {
+    'app.bsky.feed.post': 'post',
+    'app.bsky.feed.like': 'like',
+    'app.bsky.feed.repost': 'repost',
+    'app.bsky.graph.follow': 'follow',
+    'app.bsky.actor.profile': 'profile',
+}
+DEFAULT_COLLECTIONS = tuple(COLLECTION_NAMES.keys())
+SNOWFLAKE_BATCH_SIZE = 250
+
+
+class JetStreamInputStream(BaseInputStream[BaseAckingContext[Action]]):
+    """An Osprey event input stream that subscribes to the ATProto JetStream websocket and yields
+    Osprey actions.
+
+    The JetStream JSON event is passed through unchanged as the Action's data dict, so rules may
+    target the JetStream-native paths directly, like $.did, $.kind, or $.commit.operation.
+    """
+
+    def __init__(
+        self,
+        endpoint: Optional[str] = None,
+        wanted_collections: Optional[List[str]] = None,
+        reconnect_seconds: float = 2.0,
+    ):
+        super().__init__()
+        self._endpoint = endpoint or DEFAULT_ENDPOINT
+        self._wanted_collections = list(wanted_collections) if wanted_collections else list(DEFAULT_COLLECTIONS)
+        self._reconnect_seconds = reconnect_seconds
+        self._last_time_us: Optional[int] = None
+        self._snowflake_buffer: List[int] = []
+
+    def _next_action_id(self) -> int:
+        if not self._snowflake_buffer:
+            batch = generate_snowflake_batch(count=SNOWFLAKE_BATCH_SIZE, retries=3)
+            self._snowflake_buffer = [s.to_int() for s in batch]
+        return self._snowflake_buffer.pop()
+
+    def _build_url(self) -> str:
+        params = [('wantedCollections', c) for c in self._wanted_collections]
+        if self._last_time_us is not None:
+            params.append(('cursor', str(self._last_time_us)))
+        return f'{self._endpoint}?{urlencode(params)}'
+
+    def _gen(self) -> Iterator[BaseAckingContext[Action]]:
+        while True:
+            try:
+                url = self._build_url()
+                yield from self._stream_one_connection(url)
+            except Exception as e:
+                logger.exception(f'JetStream stream error; reconnecting in {self._reconnect_seconds}s: {e}')
+                sentry_sdk.capture_exception(e)
+            time.sleep(self._reconnect_seconds)
+
+    def _stream_one_connection(self, url: str) -> Iterator[BaseAckingContext[Action]]:
+        logger.info(f'Connecting to JetStream at {url}')
+        ws = websocket.create_connection(url, timeout=30)
+        logger.info('JetStream connection established')
+        try:
+            while True:
+                try:
+                    raw = ws.recv()
+                except WebSocketConnectionClosedException:
+                    logger.info('JetStream connection closed; will reconnect')
+                    return
+                if not raw:
+                    continue
+                try:
+                    event = json.loads(raw)
+                    action = _event_to_action(event, action_id=self._next_action_id())
+                except Exception:
+                    logger.exception('skipping malformed JetStream event')
+                    sentry_sdk.capture_exception()
+                    continue
+                if action is None:
+                    continue
+                time_us = event.get('time_us')
+                if time_us and isinstance(time_us, int) and time_us > 0:
+                    self._last_time_us = time_us
+                metrics.increment('jetstream_input_stream.events', tags=[f'action_name:{action.action_name}'])
+                yield NoopAckingContext(action)
+        finally:
+            try:
+                ws.close()
+            except Exception:
+                logger.info('ignored error while closing JetStream socket', exc_info=True)
+
+
+def _event_to_action(event: Dict[str, Any], action_id: int) -> Optional[Action]:
+    """Wraps a JetStream event as an Osprey action, or returns None if it should be skipped."""
+    kind = event.get('kind')
+    if kind not in ('commit', 'identity'):
+        return None
+    time_us = event.get('time_us')
+    if not isinstance(time_us, int) or time_us <= 0:
+        return None
+    if kind == 'commit':
+        commit = event.get('commit') or {}
+        operation = commit.get('operation')
+        short = COLLECTION_NAMES.get(commit.get('collection', ''))
+        if short is None or operation not in ('create', 'update', 'delete'):
+            return None
+        action_name = f'{operation}_{short}'
+    else:
+        action_name = 'identity'
+    return Action(
+        action_id=action_id,
+        action_name=action_name,
+        data=event,
+        timestamp=datetime.fromtimestamp(time_us / 1_000_000, tz=timezone.utc),
+    )

example_atproto_plugins/src/atproto_plugin/register_plugins.py

@@ -0,0 +1,15 @@
+from osprey.engine.executor.execution_context import Action
+from osprey.worker.adaptor.plugin_manager import hookimpl_osprey
+from osprey.worker.lib.config import Config
+from osprey.worker.sinks.sink.input_stream import BaseInputStream
+from osprey.worker.sinks.utils.acking_contexts import BaseAckingContext
+
+from atproto_plugin.jetstream_input_stream import JetStreamInputStream
+
+
+@hookimpl_osprey
+def register_input_stream(config: Config) -> BaseInputStream[BaseAckingContext[Action]]:
+    endpoint = config.get_optional_str('OSPREY_JETSTREAM_ENDPOINT')
+    raw_collections = config.get_optional_str('OSPREY_JETSTREAM_WANTED_COLLECTIONS')
+    wanted = [c.strip() for c in raw_collections.split(',') if c.strip()] if raw_collections else None
+    return JetStreamInputStream(endpoint=endpoint, wanted_collections=wanted)