diff --git a/README.md b/README.md
index d5076421..98bb9e86 100644
--- a/README.md
+++ b/README.md
@@ -44,6 +44,12 @@ python -m pip install -r requirements.txt
 python -m pytest -q
 ```
 
+## QSL compatibility status
+
+- Added `qsl.toml` with `tier = "runtime-platform"`, `ring = 3`, and `compat.bundle = "2026.07.0"` for runtime compatibility tracking.
+- Current dependency workflow is still `requirements.txt/requirements-lock.txt` + `pip`; migration to `pyproject.toml + uv.lock` is intentionally deferred due runtime entrypoint/dependency bootstrap compatibility risk.
+- TODO: keep this repository under observation and schedule a low-risk migration once runtime bootstrap can retain existing scheduler/entrypoint behavior.
+
 ## Useful docs
 
 - [`docs/binance_platform_rename_checklist.md`](docs/binance_platform_rename_checklist.md)
diff --git a/qsl.toml b/qsl.toml
new file mode 100644
index 00000000..b52c9f87
--- /dev/null
+++ b/qsl.toml
@@ -0,0 +1,14 @@
+[qsl]
+repo = "BinancePlatform"
+tier = "runtime-platform"
+ring = 3
+allow_legacy = true
+enforce_bundle = false
+migration_mode = "pyproject-uv-poc"
+
+[qsl.requires]
+quant_platform_kit = "6d3675914eb5d3fe072d3212a90dfb55fe1c1df4"
+crypto_strategies = "84e7bf5566167861f7b53bf74261364d055cd30f"
+
+[qsl.compat]
+bundle = "2026.07.0"