generated: '2026-08-09'
method: searched
source: https://raw.githubusercontent.com/causalens/dara/master/packages/dara-core/changelog.md
docs:
- https://dara.causalens.com/docs/generated/dara/reference/dara/components/changelog
- https://dara.causalens.com/docs/generated/dara/reference/create_dara_app/changelog
scope: 'Dara open-source framework. Per-package changelogs are maintained in-repo
  and rendered into the public docs. The commercial decisionOS platform publishes no
  public changelog — its release notes sit behind the login wall at docs.causalens.com.'
scheme: semver
per_package_changelogs: true
current_version:
  package: dara-core
  version: 1.29.7
process: 'Contributors must add entries to the relevant package changelog.md before
  a PR is merged. New entries go to the top of the file under a `## NEXT` heading,
  which the release script replaces with the resolved version number.'
process_source: https://raw.githubusercontent.com/causalens/dara/master/AGENTS.md
dated: false
x-dated-note: 'Entries are versioned but NOT dated — the changelog carries no release
  dates, so a consumer cannot tell when any given version shipped without going to
  the PyPI/npm release metadata.'
entries:
- version: 1.29.7
  breaking: false
  highlights:
  - Added one-at-a-time polling for DerivedVariable and Python components; polling
    now waits after each request, pauses in hidden tabs, spreads retries with jitter
    and backoff, honors Retry-After, aborts work on cleanup and drops stale results.
  - Fixed rapid navigation after early route chunks raising `Deferred already resolved`
    and leaving the NDJSON body open.
  - Fixed StreamVariable clean connection closures not reconnecting; added configurable
    SSE keepalive comments with robust parsing and cleanup.
  - Fixed FastAPI telemetry cleanup errors when application construction fails.
- version: 1.29.6
  breaking: false
  highlights:
  - Added a development-only server handshake reporting mismatched projects, with
    `dara start --dev-port` and `dara dev --port` overrides for Vite's port.
  - Fixed `dara dev` to use the application's configured static files directory.
  - Added opt-in, vendor-neutral OpenTelemetry traces, logs and metrics through
    Pydantic Logfire, covering HTTP, startup/shutdown, authentication and OIDC,
    actions, WebSockets, internal operations, tasks, workers, scheduled jobs and
    cross-process W3C propagation, while preserving the existing Prometheus endpoint.
- version: 1.29.4
  breaking: false
  highlights:
  - Isolated Dara's Prometheus collectors from the process-wide default registry.
- version: 1.29.3
  breaking: false
  highlights:
  - 'Internal: upgraded build tooling to Vite 8.'
- version: 1.29.0
  breaking: false
  highlights:
  - '`dara start --reload` preserves browser auth sessions across backend reloads
    via a local file-backed session store.'
  - Added configurable auth session storage via `config.auth_session_backend`, with
    `InMemoryAuthSessionBackend` and `FileAuthSessionBackend` built in.
  - Local `JWT_SECRET` handling now reuses a generated development signing key from
    the user cache when no secret is set.
- version: 1.28.7
  breaking: false
  highlights:
  - Extended metrics to include HTTP request stats.
- version: 1.28.6
  breaking: false
  highlights:
  - 'Added implicit batching for `@action` handlers: actions within a single execution
    are collected and applied atomically, so dependent `DerivedVariable` chains only
    recompute once against the final consistent state.'
  - Added `ctx.flush()` escape hatch to `ActionCtx` for progressive UI feedback.
- version: 1.28.5
  breaking: false
  highlights:
  - Added `DARA_POOL_MIN_WORKERS` to keep warm task-pool workers alive.
  - Added `DARA_POOL_WORKER_TIMEOUT` to configure idle worker reaping.
  - Fixed `Link` component resuspending despite `suspend_render=False`.
- version: 1.28.4
  breaking: false
  highlights:
  - Fixed StreamVariable inner HTTP connections not being cancelled on client
    disconnect, preventing connection leaks.
- version: 1.28.3
  breaking: false
  highlights:
  - Fixed StreamVariable SSE connections accumulating when dependency values changed.
x-evidence:
  fetched: '2026-08-09'
  url: https://raw.githubusercontent.com/causalens/dara/master/packages/dara-core/changelog.md
  http_status: 200