osp-provider-runtime 0.2.16

Thin runtime harness for OSP providers (RabbitMQ transport + contract execution).

osp-provider-runtime

Thin, boring runtime harness for OSP providers.

This package handles RabbitMQ message plumbing so provider implementations can focus on business logic.

What it does (v0.1)

• Parses a versioned request envelope.
• Builds provider RequestContext/ProviderRequest and calls execute(...).
• Serializes a standard response envelope.
• Applies explicit ack/requeue/dead-letter decisions.
• Emits structured logs for delivery decisions.
• Supports explicit runtime knobs for prefetch/concurrency/retries/timeouts/DLQ.
• Accepts contract_v1 request envelopes.

Result payload conventions

Provider results should keep ProviderResult.data focused on the resolved values for the task. The runtime builds the full update payload envelope:

• requested: request payload from the orchestrator
• resolved: your ProviderResult.data (after runtime normalization)
• provenance: optional; extracted from ProviderResult.data["provenance"]
• dry_run: derived from the request payload

Special keys in ProviderResult.data:

• progress_events (list): lifted into the update payload and removed from resolved to avoid duplicate TaskEvent rows.
• provenance (dict): lifted into the top-level provenance field.

Avoid embedding envelope-shaped keys (requested, resolved, request_input, request_defaults) inside ProviderResult.data. The runtime will drop them to keep the stored result compact and predictable.

What it does not do

• No provider framework.
• No plugin system.
• No workflow orchestration.

Install

pip install osp-provider-runtime

Development

env -u VIRTUAL_ENV uv sync --extra dev
hatch shell
hatch run check
hatch run build
hatch run verify

Note: before osp-provider-contracts is published to your index, use uv for local checks in this monorepo:

env -u VIRTUAL_ENV uv run ruff check .
env -u VIRTUAL_ENV uv run mypy src tests
env -u VIRTUAL_ENV uv run pytest

Runtime Knobs

Set these via RuntimeConfig in your provider runtime_app.py:

• prefetch_count (default 1)
• concurrency (default 1)
• max_attempts (default 5)
• handler_timeout_seconds (optional)
• dead_letter_exchange (optional)
• dead_letter_routing_key (optional)
• heartbeat_seconds (default 60)
• blocked_connection_timeout_seconds (default 30)
• updates_signing_enabled (default False)
• updates_signing_kid (required when signing enabled)
• updates_signing_secret (UTF-8 shared secret; set this or _b64)
• updates_signing_secret_b64 (base64-encoded shared secret; preferred for random bytes)

Update Emission

Use TaskReporter for provider task lifecycle updates. The runtime keeps transport details compatible with orchestrator consumers.

Docs:

• docs/runtime-contract.md
• docs/provider-updates.md
• docs/migration-task-reporter.md
• docs/runtime-upgrade-checklist.md
• docs/release-notes-task-reporter.md

Tag and push:

git tag v0.2.0
git push origin v0.2.0