Sinatra Python SDK

sinatra-dev is the official Python client for sinatra.dev, the hosted AI coding agent that turns Linear and GitHub issues into pull requests. Assign Sinatra an issue, mention it in Slack, or start a task from code, and it writes the change in its own sandbox and opens a draft pull request for your team to review.

With this client you can start, follow and stop Sinatra tasks and delegate Linear and GitHub issues from your own scripts, CI jobs and tools, through the Sinatra API.

It runs on Python 3.11 and later, is typed (py.typed), and depends only on httpx and attrs. The client is generated from the API's OpenAPI spec and released automatically when the spec changes. There are also official SDKs for Node.js / TypeScript and Go; see SDKs.

Install

pip install sinatra-dev

Quick start

import time

from sinatra_dev import Sinatra

# The turn is done when the task leaves these statuses (for example, it reaches replied or pr_open).
WORKING = {"pending", "investigating", "implementing", "rework"}

with Sinatra() as sinatra:  # reads SINATRA_TOKEN
    me = sinatra.me.get()
    if not me.workspaces:
        raise SystemExit("The token's user isn't in any workspace yet.")
    workspace = me.workspaces[0]

    task = sinatra.tasks.create(
        workspace.id, "Fix the flaky login test", repo="acme/web", idempotency_key="fix-flaky-login-1"
    ).task

    after = None
    while True:
        status = sinatra.tasks.get(workspace.id, task.id).status
        for m in sinatra.messages.list_all(workspace.id, task.id, after=after):
            print(f"{m.role}: {m.body}")
            after = m.id
        if status not in WORKING:
            break
        time.sleep(3)
    print(f"Task {task.id} is {status}.")

The API has no streaming. To wait for a reply, read the conversation after the last entry you've seen, and check the task's status: the agent posts one reply per turn, and the turn is done when the task stops working. The loop reads the status before the conversation, so it never stops before printing the reply that ended the turn. An unknown status counts as done, so the loop can't wait forever on a status added after this was written. See How replies work.

Examples

examples/ has small programs you can run as they are:

• delegate_issue.py: hand Sinatra a Linear issue (ENG-123) or a GitHub issue (acme/web#42), for example from a CI job.
• search_issues.py: list the open issues you could delegate, yours first.
• open_prs.py: print the pull requests Sinatra has open in each workspace as a Markdown list, for a standup or a Slack post.

With the package installed (pip install sinatra-dev), or from a checkout with uv run:

SINATRA_TOKEN=sntr_... uv run python examples/open_prs.py

Authentication

Create a personal access token on the Access tokens page (CLI & API in the dashboard). It starts with sntr_ and acts as you in every workspace you belong to. The client reads it from the SINATRA_TOKEN environment variable, or you can pass it:

sinatra = Sinatra(token=os.environ["MY_TOKEN"])

The constructor raises ValueError if it finds no token. Other options:

• base_url: defaults to https://api.sinatra.dev.
• timeout: seconds each attempt may wait to connect, and for each chunk of the response, before httpx raises httpx.TimeoutException. Defaults to 60; None turns it off. An httpx.Timeout works too.
• http_client: an httpx.Client to send requests with, for example one with a proxy. The client doesn't close it.

Every method takes a timeout keyword that overrides the client's for that call:

sinatra.tasks.get(workspace_id, task_id, timeout=5)

Use the client as a context manager, or call sinatra.close(), to release its connections.

Operations

The namespaces mirror the API's operation ids:

Responses are typed objects with snake_case attributes (task.pull_request, page.next_cursor). Fields the API added after this release are kept in each object's additional_properties.

tasks.list_all and messages.list_all page through everything for you:

for task in sinatra.tasks.list_all(workspace_id, status="pr_open"):
    print(task.id, task.title)

Fields such as status, source, role, kind and the error code are plain strings, and the API adds new values over time. Handle values you don't recognise.

Retries and idempotency

tasks.create and messages.create always send an Idempotency-Key. If you don't pass one, the client makes a random UUID. Every retry of a call sends the same key, so a retried start never starts a second task. Pass your own key to make a retry safe across process restarts too.

The client retries a request up to 3 times when it's safe to repeat:

• 429: after the Retry-After the server sends, at most 60 seconds.
• 503: after 0.5s, then 1s, then 2s.

GETs, me.revoke_token, tasks.create and messages.create retry on both. tasks.stop retries on 503 only. tickets.delegate takes no idempotency key and is never retried. Other errors, timeouts and network failures are never retried.

Errors

An error response raises a SinatraError:

from sinatra_dev import SinatraError

try:
    sinatra.tasks.stop(workspace_id, task_id)
except SinatraError as err:
    if err.code != "not_running":  # not_running: the task had already stopped
        raise

Network failures and timeouts are not wrapped: they raise the httpx.HTTPError (for example httpx.TimeoutException) that httpx raised.

The API reference lists every operation's error codes.

Versions

Releases follow semver. While the version is 0.x, a breaking API change bumps the minor version and anything else bumps the patch. From 1.0, breaking changes bump the major version and additions bump the minor.

Development

Needs uv, and Node 24 for the contract tests.

uv sync
bash scripts/install-oasdiff.sh   # installs the pinned oasdiff into .tools/bin
bash scripts/generate.sh          # regenerates src/sinatra_dev/_generated from openapi.json
uv run ruff check . && uv run ruff format --check . && uv run mypy
uv run pytest                     # wrapper tests against a local stub server
bash scripts/contract.sh          # every operation against a Prism mock of openapi.json
PATH="$PWD/.tools/bin:$PATH" bash scripts/next-version.test.sh
bash scripts/build.sh             # sdist and wheel in dist/, build backend pinned by hash

src/sinatra_dev/_generated is written by openapi-python-client and never edited by hand; CI fails if it differs from what openapi.json generates (bash scripts/check-generated.sh). openapi.json is updated by the release workflow. See RELEASING.md.

License

MIT