diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index 203f06f..83f4a82 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -35,9 +35,9 @@ jobs:
       - name: Compile all Python files
         run: |
           python3 -m py_compile \
-            acdl_platform/confidence_signal.py \
-            acdl_platform/outbox_writer.py \
-            acdl_platform/contract_resolver.py \
+            core/confidence_signal.py \
+            core/outbox_writer.py \
+            core/contract_resolver.py \
             adapters/terraform/adapter.py \
             adapters/terraform/policy/checkov_adapter.py \
             scripts/push_consumer_image.py
diff --git a/.gitea/workflows/deploy.yml b/.gitea/workflows/deploy.yml
index 45f32c3..9035c68 100644
--- a/.gitea/workflows/deploy.yml
+++ b/.gitea/workflows/deploy.yml
@@ -17,7 +17,7 @@
 #
 # What this workflow does:
 #   1. Checks out the consumer repo (the repo that invoked the workflow).
-#   2. Checks out the ACDL platform repo into the workspace (acdl-platform/).
+#   2. Checks out the ACDL platform repo into the workspace (platform/).
 #      This is the run-time fetch — consumers never clone the platform repo.
 #   3. Installs runtime deps: Python 3.12, Terraform 1.9.*, Checkov.
 #   4. Configures AWS auth (OIDC default; static-key override via secrets).
@@ -73,7 +73,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           repository: acdl/acdl
-          path: acdl-platform
+          path: platform
           ref: v1.4
 
       - uses: actions/setup-python@v5
@@ -110,18 +110,18 @@ jobs:
             check-only) MODE_FLAG="--check-only" ;;
             *) echo "Unknown mode: ${{ inputs.mode }}"; exit 1 ;;
           esac
-          bash acdl-platform/scripts/run_platform.sh $MODE_FLAG "${{ inputs.contract }}"
+          bash platform/scripts/run_platform.sh $MODE_FLAG "${{ inputs.contract }}"
 
       - name: Upload emitted Terraform
         uses: actions/upload-artifact@v4
         with:
           name: acdl-terraform
-          path: acdl-platform/terraform/spike/*.tf
+          path: platform/terraform/spike/*.tf
           if-no-files-found: warn
 
       - name: Upload platform log
         uses: actions/upload-artifact@v4
         with:
           name: acdl-platform-log
-          path: acdl-platform/logs/
+          path: platform/logs/
           if-no-files-found: warn
\ No newline at end of file
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 203f06f..83f4a82 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -35,9 +35,9 @@ jobs:
       - name: Compile all Python files
         run: |
           python3 -m py_compile \
-            acdl_platform/confidence_signal.py \
-            acdl_platform/outbox_writer.py \
-            acdl_platform/contract_resolver.py \
+            core/confidence_signal.py \
+            core/outbox_writer.py \
+            core/contract_resolver.py \
             adapters/terraform/adapter.py \
             adapters/terraform/policy/checkov_adapter.py \
             scripts/push_consumer_image.py
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 45f32c3..9035c68 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -17,7 +17,7 @@
 #
 # What this workflow does:
 #   1. Checks out the consumer repo (the repo that invoked the workflow).
-#   2. Checks out the ACDL platform repo into the workspace (acdl-platform/).
+#   2. Checks out the ACDL platform repo into the workspace (platform/).
 #      This is the run-time fetch — consumers never clone the platform repo.
 #   3. Installs runtime deps: Python 3.12, Terraform 1.9.*, Checkov.
 #   4. Configures AWS auth (OIDC default; static-key override via secrets).
@@ -73,7 +73,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           repository: acdl/acdl
-          path: acdl-platform
+          path: platform
           ref: v1.4
 
       - uses: actions/setup-python@v5
@@ -110,18 +110,18 @@ jobs:
             check-only) MODE_FLAG="--check-only" ;;
             *) echo "Unknown mode: ${{ inputs.mode }}"; exit 1 ;;
           esac
-          bash acdl-platform/scripts/run_platform.sh $MODE_FLAG "${{ inputs.contract }}"
+          bash platform/scripts/run_platform.sh $MODE_FLAG "${{ inputs.contract }}"
 
       - name: Upload emitted Terraform
         uses: actions/upload-artifact@v4
         with:
           name: acdl-terraform
-          path: acdl-platform/terraform/spike/*.tf
+          path: platform/terraform/spike/*.tf
           if-no-files-found: warn
 
       - name: Upload platform log
         uses: actions/upload-artifact@v4
         with:
           name: acdl-platform-log
-          path: acdl-platform/logs/
+          path: platform/logs/
           if-no-files-found: warn
\ No newline at end of file
diff --git a/contracts/static-asset.yaml b/contracts/static-asset.yaml
index 15f4968..1650702 100644
--- a/contracts/static-asset.yaml
+++ b/contracts/static-asset.yaml
@@ -7,7 +7,7 @@
 #   inputs:     module-specific inputs
 #
 # Validated against schemas/contract.schema.json.
-# Resolved by acdl_platform/contract_resolver.py to a Target Stack instance.
+# Resolved by core/contract_resolver.py to a Target Stack instance.
 
 uses: acdl/pipelines/deploy.yaml@v1.4
 module: static-asset
diff --git a/acdl_platform/.gitkeep b/core/.gitkeep
similarity index 100%
rename from acdl_platform/.gitkeep
rename to core/.gitkeep
diff --git a/acdl_platform/__init__.py b/core/__init__.py
similarity index 100%
rename from acdl_platform/__init__.py
rename to core/__init__.py
diff --git a/acdl_platform/audit_ledger_design.md b/core/audit_ledger_design.md
similarity index 100%
rename from acdl_platform/audit_ledger_design.md
rename to core/audit_ledger_design.md
diff --git a/acdl_platform/confidence_signal.py b/core/confidence_signal.py
similarity index 100%
rename from acdl_platform/confidence_signal.py
rename to core/confidence_signal.py
diff --git a/acdl_platform/contract_resolver.py b/core/contract_resolver.py
similarity index 100%
rename from acdl_platform/contract_resolver.py
rename to core/contract_resolver.py
diff --git a/acdl_platform/hitl_matrix_design.md b/core/hitl_matrix_design.md
similarity index 100%
rename from acdl_platform/hitl_matrix_design.md
rename to core/hitl_matrix_design.md
diff --git a/acdl_platform/outbox_writer.py b/core/outbox_writer.py
similarity index 100%
rename from acdl_platform/outbox_writer.py
rename to core/outbox_writer.py
diff --git a/acdl_platform/separation_of_duties.py b/core/separation_of_duties.py
similarity index 100%
rename from acdl_platform/separation_of_duties.py
rename to core/separation_of_duties.py
diff --git a/pipelines/ci.yaml b/pipelines/ci.yaml
index 2493973..2910b3d 100644
--- a/pipelines/ci.yaml
+++ b/pipelines/ci.yaml
@@ -29,9 +29,9 @@ stages:
     description: Compile all Python files (py_compile)
     command: |
       python3 -m py_compile \
-        acdl_platform/confidence_signal.py \
-        acdl_platform/outbox_writer.py \
-        acdl_platform/contract_resolver.py \
+        core/confidence_signal.py \
+        core/outbox_writer.py \
+        core/contract_resolver.py \
         adapters/terraform/adapter.py \
         adapters/terraform/policy/checkov_adapter.py \
         scripts/push_consumer_image.py
diff --git a/pipelines/deploy.yaml b/pipelines/deploy.yaml
index 466da16..df8d4e9 100644
--- a/pipelines/deploy.yaml
+++ b/pipelines/deploy.yaml
@@ -27,7 +27,7 @@ stages:
 
   - name: resolve-stack
     description: Resolve the contract to a Target Stack instance via the contract resolver
-    command: python3 acdl_platform/contract_resolver.py contracts/static-asset.yaml /tmp/acdl-stack.json
+    command: python3 core/contract_resolver.py contracts/static-asset.yaml /tmp/acdl-stack.json
     required: true
 
   - name: terraform-plan
@@ -42,7 +42,7 @@ stages:
 
   - name: confidence
     description: Compute the confidence signal from policy + validation inputs
-    command: python3 acdl_platform/confidence_signal.py /tmp/acdl-deploy-inputs.json dev
+    command: python3 core/confidence_signal.py /tmp/acdl-deploy-inputs.json dev
     required: true
 
   - name: apply
diff --git a/scripts/run_ci.sh b/scripts/run_ci.sh
index 1d26661..043c010 100755
--- a/scripts/run_ci.sh
+++ b/scripts/run_ci.sh
@@ -42,9 +42,9 @@ echo ""
 
 banner "Stage 1/3: lint (py_compile)"
 python3 -m py_compile \
-  acdl_platform/confidence_signal.py \
-  acdl_platform/outbox_writer.py \
-  acdl_platform/contract_resolver.py \
+  core/confidence_signal.py \
+  core/outbox_writer.py \
+  core/contract_resolver.py \
   adapters/terraform/adapter.py \
   adapters/terraform/policy/checkov_adapter.py \
   scripts/push_consumer_image.py \
diff --git a/scripts/run_platform.sh b/scripts/run_platform.sh
index a3c9724..570a7f8 100755
--- a/scripts/run_platform.sh
+++ b/scripts/run_platform.sh
@@ -19,7 +19,7 @@
 #   --quiet   suppress terraform/checkov streaming (output to log only)
 #
 # The contract file is a YAML file validated against schemas/contract.schema.json.
-# The resolver (acdl_platform/contract_resolver.py) resolves it to a Target Stack
+# The resolver (core/contract_resolver.py) resolves it to a Target Stack
 # instance, which the adapter (adapters/terraform/adapter.py) compiles to Terraform.
 #
 # Uses the rotated spike key (D-039/D-047) from gitignored .env.secrets.
@@ -30,7 +30,7 @@ ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
 # Capture the caller's CWD before we cd to ROOT. The reusable deploy workflow
 # invokes this script from the CONSUMER repo's workspace root with a relative
 # contract path (e.g. .acdl/contract.yaml); the contract must resolve against
-# the consumer repo, not the platform repo (acdl-platform/). Without this, the
+# the consumer repo, not the platform repo (platform/). Without this, the
 # `[ -f "$CONTRACT" ]` check below looks for the contract inside the platform
 # repo and fails (P0 fix — see docs/CONSUMER_GUIDE.md Step 4).
 CALLER_CWD="$(pwd)"
@@ -86,7 +86,7 @@ stream() {
 }
 
 CONTRACT_ID="11111111-1111-1111-1111-111111111111"  # spike fixed UUID
-WORK="/tmp/acdl_platform"
+WORK="/tmp/acdl_platform_run"
 rm -rf "$WORK"; mkdir -p "$WORK"
 
 echo "=== Step 1: validate contract against contract.schema.json ==="
@@ -101,7 +101,7 @@ print(f'contract: module={contract[\"module\"]} env={contract[\"environment\"]}
 
 echo ""
 echo "=== Step 2: resolve contract -> Target Stack instance ==="
-python3 acdl_platform/contract_resolver.py "$CONTRACT" "$WORK/stack.json" || fail "resolver failed"
+python3 core/contract_resolver.py "$CONTRACT" "$WORK/stack.json" || fail "resolver failed"
 python3 -c "import json; d=json.load(open('$WORK/stack.json')); print(f'stack: {d[\"stack\"][\"name\"]} {d[\"stack\"][\"kind\"]} {len(d[\"resources\"])} resource(s)')"
 
 echo ""
@@ -211,7 +211,7 @@ echo ""
 echo "=== Step 7: confidence signal compute ==="
 python3 <<PY > "$WORK/signal.json" || fail "confidence signal failed"
 import json
-import acdl_platform.confidence_signal as c
+import core.confidence_signal as c
 pcr = json.load(open("$WORK/pcr.json"))
 inputs = {
     "policy": pcr,
@@ -247,7 +247,7 @@ event = {
 }
 print(json.dumps(event, indent=2))
 PY
-python3 acdl_platform/outbox_writer.py "$WORK/event.json" > "$WORK/outbox_item.json" || fail "outbox write failed"
+python3 core/outbox_writer.py "$WORK/event.json" > "$WORK/outbox_item.json" || fail "outbox write failed"
 echo "outbox: $(python3 -c "import json; d=json.load(open('$WORK/outbox_item.json')); print('contractId=', d['contractId'], 'hash=', d['hash'][:16]+'...')")"
 
 echo ""
diff --git a/tests/test_confidence_signal.py b/tests/test_confidence_signal.py
index 4763dd4..9fe3a3c 100644
--- a/tests/test_confidence_signal.py
+++ b/tests/test_confidence_signal.py
@@ -6,7 +6,7 @@ import pytest
 
 sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
 
-from acdl_platform.confidence_signal import (
+from core.confidence_signal import (
     WEIGHTS, PENALTY, THRESHOLDS, compute, Signal, _per_input_score,
 )
 
diff --git a/tests/test_contract_resolver.py b/tests/test_contract_resolver.py
index 85ca470..f2d6be7 100644
--- a/tests/test_contract_resolver.py
+++ b/tests/test_contract_resolver.py
@@ -25,7 +25,7 @@ class TestContractSchema:
 
 class TestResolveStaticAsset:
     def test_resolve_static_asset_contract(self, tmp_path):
-        from acdl_platform.contract_resolver import resolve
+        from core.contract_resolver import resolve
         stack = resolve(str(ROOT / "contracts/static-asset.yaml"), str(ROOT))
         assert stack["stack"]["name"] == "static-asset"
         assert stack["stack"]["kind"] == "l2"
@@ -33,7 +33,7 @@ class TestResolveStaticAsset:
         assert len(stack["resources"]) >= 1
 
     def test_resolve_static_asset_has_s3_resource(self):
-        from acdl_platform.contract_resolver import resolve
+        from core.contract_resolver import resolve
         stack = resolve(str(ROOT / "contracts/static-asset.yaml"), str(ROOT))
         s3_res = [r for r in stack["resources"] if r["type"] == "aws:s3:bucket"]
         assert len(s3_res) == 1
@@ -41,7 +41,7 @@ class TestResolveStaticAsset:
         assert s3_res[0]["inputs"]["region"] == "us-east-1"
 
     def test_resolve_static_asset_validates_against_stack_schema(self):
-        from acdl_platform.contract_resolver import resolve
+        from core.contract_resolver import resolve
         stack = resolve(str(ROOT / "contracts/static-asset.yaml"), str(ROOT))
         schema = json.load(open(ROOT / "schemas/stack.schema.json"))
         jsonschema.validate(stack, schema)
@@ -63,7 +63,7 @@ class TestResolveMicroservice:
         with open(contract_path, "w") as fh:
             yaml.dump(contract, fh)
         try:
-            from acdl_platform.contract_resolver import resolve
+            from core.contract_resolver import resolve
             stack = resolve(str(contract_path), str(ROOT))
             assert stack["stack"]["name"] == "microservice"
             assert stack["stack"]["kind"] == "l2"
@@ -86,7 +86,7 @@ class TestResolveL1Direct:
         contract_path = tmp_path / "test-s3.yaml"
         with open(contract_path, "w") as fh:
             yaml.dump(contract, fh)
-        from acdl_platform.contract_resolver import resolve
+        from core.contract_resolver import resolve
         stack = resolve(str(contract_path), str(ROOT))
         assert stack["stack"]["name"] == "s3"
         assert stack["stack"]["kind"] == "l1"
@@ -104,7 +104,7 @@ class TestResolveL1Direct:
         contract_path = tmp_path / "test-s3-schema.yaml"
         with open(contract_path, "w") as fh:
             yaml.dump(contract, fh)
-        from acdl_platform.contract_resolver import resolve
+        from core.contract_resolver import resolve
         stack = resolve(str(contract_path), str(ROOT))
         schema = json.load(open(ROOT / "schemas/stack.schema.json"))
         jsonschema.validate(stack, schema)
@@ -121,7 +121,7 @@ class TestResolveErrors:
         contract_path = tmp_path / "bad.yaml"
         with open(contract_path, "w") as fh:
             yaml.dump(contract, fh)
-        from acdl_platform.contract_resolver import resolve
+        from core.contract_resolver import resolve
         with pytest.raises(ValueError, match="not found in registry"):
             resolve(str(contract_path), str(ROOT))
 
@@ -130,7 +130,7 @@ class TestResolveErrors:
         contract_path = tmp_path / "incomplete.yaml"
         with open(contract_path, "w") as fh:
             yaml.dump(contract, fh)
-        from acdl_platform.contract_resolver import resolve
+        from core.contract_resolver import resolve
         with pytest.raises(jsonschema.ValidationError):
             resolve(str(contract_path), str(ROOT))
 
diff --git a/tests/test_outbox_writer.py b/tests/test_outbox_writer.py
index dabe52a..0c49110 100644
--- a/tests/test_outbox_writer.py
+++ b/tests/test_outbox_writer.py
@@ -8,7 +8,7 @@ import pytest
 
 sys.path.insert(0, str(Path(__file__).resolve().parent.parent))
 
-from acdl_platform.outbox_writer import _canonical_hash, write_event
+from core.outbox_writer import _canonical_hash, write_event
 
 
 class TestCanonicalHash:
diff --git a/tests/test_pipeline.py b/tests/test_pipeline.py
index b638f71..db2cf3c 100644
--- a/tests/test_pipeline.py
+++ b/tests/test_pipeline.py
@@ -29,7 +29,7 @@ class TestPipelineIntegration:
 
     def test_confidence_signal_with_adapted_tf(self):
         sys.path.insert(0, str(ROOT))
-        from acdl_platform.confidence_signal import compute
+        from core.confidence_signal import compute
 
         inputs = {
             "policy": [{"result": "pass"}],
diff --git a/tests/test_pipeline_contract.py b/tests/test_pipeline_contract.py
index 21565ba..e673e4a 100644
--- a/tests/test_pipeline_contract.py
+++ b/tests/test_pipeline_contract.py
@@ -78,7 +78,7 @@ class TestPipelineContract:
         contract = _load_yaml("pipelines/ci.yaml")
         lint = next(s for s in contract["stages"] if s["name"] == "lint")
         assert "py_compile" in lint["command"]
-        assert "acdl_platform/confidence_signal.py" in lint["command"]
+        assert "core/confidence_signal.py" in lint["command"]
         assert "adapters/terraform/adapter.py" in lint["command"]
 
     def test_contract_test_command_runs_pytest(self):
@@ -141,9 +141,9 @@ class TestWorkflowConformance:
         run_step = next(s for s in lint_job["steps"] if "run" in s)
         assert "py_compile" in run_step["run"]
         for py_file in [
-            "acdl_platform/confidence_signal.py",
-            "acdl_platform/outbox_writer.py",
-            "acdl_platform/contract_resolver.py",
+            "core/confidence_signal.py",
+            "core/outbox_writer.py",
+            "core/contract_resolver.py",
             "adapters/terraform/adapter.py",
             "adapters/terraform/policy/checkov_adapter.py",
             "scripts/push_consumer_image.py",
@@ -175,8 +175,8 @@ class TestRunCiScript:
     def test_run_ci_script_contains_lint_stage(self):
         content = open(ROOT / "scripts/run_ci.sh").read()
         assert "py_compile" in content
-        assert "acdl_platform/confidence_signal.py" in content
-        assert "acdl_platform/contract_resolver.py" in content
+        assert "core/confidence_signal.py" in content
+        assert "core/contract_resolver.py" in content
         assert "adapters/terraform/adapter.py" in content
 
     def test_run_ci_script_contains_test_stage(self):
@@ -198,9 +198,9 @@ class TestRunCiScript:
             ["bash", "-c",
              f"cd {ROOT} && "
              "python3 -m py_compile "
-             "acdl_platform/confidence_signal.py "
-             "acdl_platform/outbox_writer.py "
-             "acdl_platform/contract_resolver.py "
+             "core/confidence_signal.py "
+             "core/outbox_writer.py "
+             "core/contract_resolver.py "
              "adapters/terraform/adapter.py "
              "adapters/terraform/policy/checkov_adapter.py "
              "scripts/push_consumer_image.py && "
@@ -342,7 +342,7 @@ class TestDeployWorkflowConformance:
         deploy_job = wf["jobs"]["deploy"]
         platform_checkout = next(
             s for s in deploy_job["steps"]
-            if "checkout" in s.get("uses", "") and s.get("with", {}).get("path") == "acdl-platform"
+            if "checkout" in s.get("uses", "") and s.get("with", {}).get("path") == "platform"
         )
         assert platform_checkout["with"]["repository"] == "acdl/acdl"