Introduce COMPUTE_NATS_REPLICAS environment variable to control the number of
replicas for JetStream streams and key-value buckets. Only values 1, 3, or 5
are accepted, defaulting to 1 for other inputs. Update worker server logic and
deployment documentation to describe and support this configuration.
Add lazy NATS connection lifecycle and idle disconnect logic to the worker,
enabling automatic disconnection after 120s of inactivity to support Railway
container sleep. Update deployment docs to describe this behavior, including
caveats and reconnection flow.
Introduce automatic healing for stale PDF parse states in API routes. Add
`isDocumentParseStateStale` utility and use a shared `COMPUTE_OP_STALE_MS`
environment variable (with config getter) to control the stale window for both
worker op replacement and app-side parse-state healing. Update documentation and
environment variable references to reflect new config.
Enables automatic marking of stuck parses as failed, improving reliability and
retry behavior in distributed compute environments.
Align COMPUTE_PDF_JOB_ATTEMPTS default value with new ONNX-based PDF layout
parsing approach by setting it to 1 in environment examples, worker config,
and deployment documentation. This reflects improved reliability and reduces
unnecessary retries for PDF processing jobs.
Standardize compute job concurrency configuration by introducing a shared
COMPUTE_JOB_CONCURRENCY setting, replacing separate PDF and Whisper concurrency
controls. Add cross-platform CPU core detection and thread budgeting utilities,
and update both ONNX model execution and concurrency limiters to use dynamic
thread allocation per job. Refactor environment variable docs and examples to
reflect unified concurrency management. Streamline PDF.js font path resolution
for improved reliability across environments.
Update compute worker to use separate environment variable for PDF job attempts
(`COMPUTE_PDF_JOB_ATTEMPTS`) and set Whisper job max deliveries to 1, clarifying
and separating retry logic between job types. Adjust `.env.example` and deployment
docs to comment out defaults and document new/renamed variables for advanced tuning.
In TTS segment ensure route, introduce explicit timeouts for Whisper alignment
operations, with configurable durations for local and worker modes, improving
robustness and error handling for long-running alignments.
Migrate worker and backend contract to an operation-centric model, introducing opKey-based deduplication for Whisper alignment and PDF layout parsing. Add new operation request/state types and update worker endpoints to accept generic operation requests and expose operation status via SSE. Refactor client and server logic to support operation flows. Update deployment docs, environment examples, and Dockerfile to reflect new architecture and dependency management.
Align compute worker to use PORT environment variable consistently across
Dockerfile, docker-compose, and server code, replacing COMPUTE_WORKER_PORT.
Update .env.example and deployment documentation to clarify platform-specific
behavior, especially for Railway and similar environments. This simplifies
configuration and reduces platform-specific issues.
Add `COMPUTE_JOBS_STREAM_MAX_BYTES` and `COMPUTE_JOB_STATES_MAX_BYTES` to
environment example, worker server configuration, and deployment docs. These
variables allow tuning JetStream resource caps for job queue and state storage
to better fit deployment requirements.
Add a comprehensive Synadia Cloud and Railway setup guide to the compute worker
deployment docs, including step-by-step environment variable configuration and
example image tags. Update Vercel deployment instructions with a quick start for
external compute worker integration via Railway and Synadia NGS. Document new
`.env.prod` pattern in .gitignore for production environment management.
Expand compute worker documentation to explain NATS authentication using
either a credentials file or raw credentials string, including Synadia Cloud
integration steps. Update environment variable examples and server connection
logic to support both `NATS_CREDS_FILE` and `NATS_CREDS`. Add `.creds` to
.gitignore to avoid accidental credential leaks.
This improves deployment flexibility for cloud and on-prem environments by
supporting multiple authentication methods for NATS JetStream.
Replace Redis and BullMQ with NATS JetStream and KV for job queuing and state management
in the compute worker service. Update environment variables, Docker Compose, and documentation
to reflect the new message queue backend. Adjust dependencies and code to use NATS-based
work queue and key-value storage for durable job processing.
This change improves scalability and reliability of distributed compute workloads by leveraging
NATS JetStream's work queue and persistence features. Documentation and configuration examples
are updated to guide deployments using the new backend.
Introduce support for external compute worker mode (`COMPUTE_MODE=worker`) using a new `WorkerComputeBackend`. This enables offloading heavy ONNX Whisper alignment and PDF layout parsing to a standalone worker service (Redis + BullMQ), improving scalability and compatibility with serverless/limited environments.
- Add `@openreader/compute-core` as a shared package for ONNX inference and PDF parsing logic.
- Implement `WorkerComputeBackend` and worker contract/types for remote job execution.
- Update compute backend selection logic and remove previous worker mode guards.
- Extend `WhisperAlignInput` and `PdfLayoutInput` types to support object keys for remote data access.
- Refactor local compute backend to use `@openreader/compute-core` and support both buffer and object key inputs.
- Update job runner, TTS segment alignment, and PDF layout parsing flows to use new compute backend APIs.
- Add scripts, Docker workflow, and documentation for deploying and running the compute worker.
- Update environment variable docs and examples for worker mode, including storage requirements and configuration.
- Document published images and stack changes to reflect the new compute worker architecture.
BREAKING CHANGE: `COMPUTE_MODE=worker` now requires an external compute worker service and S3-compatible object storage. Embedded SeaweedFS (`weed mini`) is not supported in worker mode. See the new documentation for deployment and configuration details.
