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+# faststream-outbox 0.13.0 — free-threaded (3.14t) Python support
+
+**Minor release.** `faststream-outbox` now officially supports free-threaded
+(no-GIL) CPython. There is **no change to the installed package's runtime
+behavior or public API** — the producer, subscriber, lease/terminal-write,
+timer, DLQ, and validation paths are identical to 0.12.0. The only shipped delta
+is a new trove classifier; everything else is CI and docs.
+
+## Breaking changes
+
+None — additive packaging metadata only.
+
+## Packaging
+
+- Added the `Programming Language :: Python :: Free Threading :: 2 - Beta`
+  classifier. On a `python3.14t` interpreter, `pip`/`uv` resolve the
+  free-threaded (`cp314t`) wheels of the compiled dependencies (`asyncpg`,
+  `sqlalchemy`, `pydantic-core`) automatically. No dependency-floor change; GIL
+  builds are unaffected.
+
+## Free-threaded support — what it means
+
+- The package is pure-Python asyncio (one event loop, worker *tasks* not OS
+  threads), so nothing in it depends on the GIL. CI now runs the full suite on
+  the 3.14t interpreter and, in a separate step, asserts that importing the
+  outbox and its runtime dependencies keeps the GIL disabled — so a future
+  dependency that silently re-enables the GIL turns the build red.
+- **It does not add cross-core parallelism.** The subscriber is single-loop by
+  design; to use more cores, run more subscriber processes — the same lever as
+  on a GIL build.
+- **To keep the GIL genuinely disabled, set `DISABLE_SQLALCHEMY_CEXT_RUNTIME=1`.**
+  SQLAlchemy's Cython extensions ship 3.14t wheels but don't yet declare
+  free-thread safety, so importing SQLAlchemy otherwise re-enables the GIL
+  process-wide (your outbox code runs correctly either way). Foreign-broker
+  relay clients you install (e.g. `aiokafka`) can do the same. See the
+  [Free-threaded Python docs](https://faststream-outbox.modern-python.org/introduction/installation/#free-threaded-python).
+- **3.14t only.** The compiled dependencies ship no `cp313t` wheels, so 3.13t
+  is not a supported free-threaded target.
+
+## Migration
+
+No action needed — no API or behavior change. Existing installs on GIL builds
+(Python 3.11–3.14) are unaffected.
+
+## Touched surface
+
+- `pyproject.toml` — the new classifier.
+- `.github/workflows/_checks.yml` — the standalone `freethreaded` CI job.
+- `docs/introduction/installation.md` — a "Free-threaded Python" section.
+- `planning/` — the design change file and two decision records.
+
+## See also
+
+- #151 — Free-threaded Python (3.14t) support