feat(provider-tck): add the Python conformance suite for OpenFeature providers

.github/workflows/build.yml

@@ -16,6 +16,13 @@ on:
       - reopened
     branches:
       - main
+      # Temporary, for the duration of the provider conformance suite's review.
+      # Without it a stacked pull request gets no CI at all: this filter matches
+      # the pull request's BASE branch, so only the suite PR itself -- the one
+      # targeting main -- was ever checked, and the report and adoption PRs
+      # stacked on it were merged-in-theory and tested never. Remove once the
+      # chain has landed. See open-feature/spec#417.
+      - 'feat/provider-tck*'
 
 permissions:
   contents: read
@@ -66,11 +73,20 @@ jobs:
             tools/openfeature-flagd-api-testkit:
               - 'tools/openfeature-flagd-api-testkit/**'
               - 'uv.lock'
+            tools/openfeature-tck:
+              - 'tools/openfeature-tck/**'
+              - 'uv.lock'
 
   build:
     needs: changes
     runs-on: ubuntu-latest
     strategy:
+      # A matrix of every supported Python against every changed package exists
+      # to say *which* combinations fail. The default `fail-fast: true` discards
+      # exactly that: the first failing cell cancels every other one, so a run
+      # that could have reported thirty results reports one, and an unrelated
+      # package's failure is indistinguishable from your own.
+      fail-fast: false
       matrix:
         python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
         package: ${{ fromJSON(needs.changes.outputs.packages) }}

.gitmodules

@@ -7,3 +7,6 @@
 [submodule "providers/openfeature-provider-flagd/openfeature/test-harness"]
 	path = providers/openfeature-provider-flagd/openfeature/test-harness
 	url = https://github.com/open-feature/flagd-testbed.git
+[submodule "tools/openfeature-tck/spec"]
+	path = tools/openfeature-tck/spec
+	url = https://github.com/open-feature/spec

.release-please-manifest.json

@@ -8,5 +8,6 @@
   "providers/openfeature-provider-unleash": "0.1.2",
   "tools/openfeature-flagd-api": "1.0.0",
   "tools/openfeature-flagd-core": "1.0.0",
-  "tools/openfeature-flagd-api-testkit": "0.1.0"
+  "tools/openfeature-flagd-api-testkit": "0.1.0",
+  "tools/openfeature-tck": "0.1.0"
 }

pyproject.toml

@@ -16,6 +16,7 @@ dependencies = [
     "openfeature-flagd-api",
     "openfeature-flagd-core",
     "openfeature-flagd-api-testkit",
+    "openfeature-tck",
 ]
 
 [dependency-groups]
@@ -43,6 +44,7 @@ openfeature-provider-unleash = { workspace = true }
 openfeature-flagd-api = { workspace = true }
 openfeature-flagd-core = { workspace = true }
 openfeature-flagd-api-testkit = { workspace = true }
+openfeature-tck = { workspace = true }
 
 [tool.uv.workspace]
 members = [
@@ -58,7 +60,10 @@ exclude = [
     ".venv",
     "__pycache__",
     "venv",
-    "providers/openfeature-provider-flagd/src/openfeature/schemas/**"
+    "providers/openfeature-provider-flagd/src/openfeature/schemas/**",
+    # Submodules of other repositories: not ours to lint or format.
+    "providers/openfeature-provider-flagd/openfeature/spec/**",
+    "tools/openfeature-tck/spec/**",
 ]
 
 [tool.ruff.lint]

release-please-config.json

@@ -99,6 +99,15 @@
       "extra-files": [
         "README.md"
       ]
+    },
+    "tools/openfeature-tck": {
+      "package-name": "openfeature-tck",
+      "bump-minor-pre-major": true,
+      "bump-patch-for-minor-pre-major": true,
+      "versioning": "default",
+      "extra-files": [
+        "README.md"
+      ]
     }
   },
   "changelog-sections": [

tools/openfeature-tck/.gitignore

@@ -0,0 +1,7 @@
+# Copied from the open-feature/spec submodule by hatch_build_sync.py.
+# DO NOT EDIT the copies, and do not commit them: the canonical definitions live
+# in spec/specification/assets/provider-tck/, and the revision this package is
+# built against is recorded by the submodule pin.
+src/openfeature/contrib/tools/tck/gherkin/
+src/openfeature/contrib/tools/tck/flag_data/
+src/openfeature/contrib/tools/tck/control-api.yaml

tools/openfeature-tck/LICENSE

@@ -0,0 +1,201 @@
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