streamling-sink-plugin SKILL.md skillA
streamling-sink-plugin from goldsky-io/streamling is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add goldsky-io/streamling/streamling-sink-plugin@git:20260625.ecf56acPins git:20260625.ecf56ac in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- goldsky-io/streamling
- Path
skills/streamling-sink-plugin/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260625.ecf56ac, committed Jun 25, 2026
- Size
- 13,473 bytes
- Repository stars
- 107
- License
- a license file GitHub does not identify
Use when implementing a streamling SinkPlugin — lazy client initialization in initialize(), the empty-batch guard, converting RecordBatch to NDJSON for outbound writes, batched writes with retry and exponential backoff, partial-batch-failure handling that avoids silent data loss, and checkpoint-ack semantics for exactly-once. Assumes streamling-plugin-basics.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# streamling sink plugin — Agent Skill
A **sink** consumes `RecordBatch`es at the tail of a pipeline and writes them to an external system (a database, queue, object store, webhook). Sinks receive an upstream schema, do heavy I/O, and must preserve exactly-once semantics through the checkpoint protocol.
**Prerequisite:** [`streamling-plugin-basics`](skill://streamling-plugin-basics) (crate setup, registration, lifecycle, errors).
## The trait
```rust
#[async_trait]
pub trait SinkPlugin: SupportsGracefulShutdown + Send + Sync {
async fn initialize(&self) -> Result<(), PluginError>;
fn labels(&self) -> Vec<PluginLabel> { Vec::new() } // optional identity
async fn process_batch(&self, data: RecordBatch) -> Result<(), PluginError>;
async fn process_checkpoint_marker(&self, epoch: CheckpointEpoch) -> Result<(), PluginError>;
async fn process_checkpoint_finalizer(&self, epoch: CheckpointEpoch) -> Result<(), PluginError>;
}
```
Constructor (called by `register_plugin_sink!` — **schema first**, it's the upstream input schema):
```rust
pub fn new(
schema: SchemaRef,
rt: PluginAsyncRuntimeObj,
state_backend_factory: PluginStateBackendFactory,
…Read the whole file at its exact version.
How to install
mdr add goldsky-io/streamling/streamling-sink-plugin@sha256:3a5ac2fe48b08f64The line at the top of this page pins the label git:20260625.ecf56ac, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_jcvfpfacdrnhkywa)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jun 25, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (13473 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
goldsky-io/streamling · 107 stars · license a license file GitHub does not identify · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_jcvfpfacdrnhkywa GET https://markdownregistry.com/api/v1/resolve?ref=goldsky-io/streamling/streamling-sink-plugin GET https://markdownregistry.com/api/v1/blob/3a5ac2fe48b08f6435e48f5c24e5210b841b0ebab2b62d0018fa506f28b6d16f
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.