diff --git a/experiments/perception/e37_ravnoves00_acceptance_profile.json b/experiments/perception/e37_ravnoves00_acceptance_profile.json
new file mode 100644
index 0000000..83042f8
--- /dev/null
+++ b/experiments/perception/e37_ravnoves00_acceptance_profile.json
@@ -0,0 +1,64 @@
+{
+  "schema_version": "missioncore.e37-acceptance-profile/v1",
+  "profile_id": "e37-ravnoves00-r0-acceptance/v1",
+  "source": {
+    "session_id": "20260720T065719Z_viewer_live",
+    "display_name": "RAVNOVES00",
+    "materialization_id": "e30-materialization-841af926d8d28ab93538c46d8f31278a2234c4d1c12c7dc4dc296b249d59735a",
+    "engineering_generation_id": "e30-engineering-generation-62a4fea10dea9b77f69ceac1af5bf0e4928d9c7716083c22258a03670fe5bd4f",
+    "human_generation_id": "e30-review-generation-7982a882558d0be690b4c7092e328c080bfcbf52478a220452be7e887a588250"
+  },
+  "denominator": {
+    "expected_items": 486,
+    "label_provenance": "engineering-reviewed-with-human-exceptions",
+    "independent_ground_truth": false
+  },
+  "split": {
+    "strategy": "deterministic-source-stratum-range-holdout",
+    "seed": "ravnoves00-r0-validation-v1",
+    "validation_fraction": 0.3,
+    "mutable_after_publication": false
+  },
+  "ontology": {
+    "presence": [
+      "object-present",
+      "occupied-environment",
+      "background-or-noise",
+      "unknown"
+    ],
+    "geometry_association": [
+      "object-associated",
+      "independent-occupied",
+      "rejected-nonobject",
+      "insufficient-support",
+      "unknown"
+    ],
+    "freshness": [
+      "current",
+      "held",
+      "stale",
+      "unavailable",
+      "unknown"
+    ]
+  },
+  "metrics": {
+    "presence_target": 0.9,
+    "geometry_association_target": 0.9,
+    "freshness_target": 0.9,
+    "accounting_target": 1.0,
+    "maximum_false_free_claims": 0,
+    "targets_apply_separately": true
+  },
+  "severity": {
+    "levels": [
+      "standard",
+      "medium",
+      "high"
+    ],
+    "high_impact_failure_blocks_gate": true
+  },
+  "authority": {
+    "commands_enabled": false,
+    "navigation_or_safety_accepted": false
+  }
+}
diff --git a/experiments/perception/prepare_e37_worker_package.py b/experiments/perception/prepare_e37_worker_package.py
new file mode 100644
index 0000000..0a1cd5e
--- /dev/null
+++ b/experiments/perception/prepare_e37_worker_package.py
@@ -0,0 +1,290 @@
+#!/usr/bin/env python3
+"""Build a minimal immutable E37 package for Worker 006."""
+
+from __future__ import annotations
+
+import argparse
+import hashlib
+import json
+import os
+import shutil
+import uuid
+from datetime import UTC, datetime
+from pathlib import Path
+from typing import Any
+
+from k1link.compute.e37_acceptance_contract import (
+    E37_PACKAGE_SCHEMA,
+    E37_PROFILE_SCHEMA,
+)
+
+_RUNTIME_FILES = {
+    "runtime/k1link/__init__.py": "src/k1link/__init__.py",
+    "runtime/k1link/compute/__init__.py": None,
+    "runtime/k1link/compute/e37_acceptance_contract.py": (
+        "src/k1link/compute/e37_acceptance_contract.py"
+    ),
+    "runtime/run_e37_acceptance_contract.py": (
+        "experiments/perception/worker/run_e37_acceptance_contract.py"
+    ),
+    "runtime/Invoke-E37AcceptanceContract.ps1": (
+        "experiments/perception/worker/Invoke-E37AcceptanceContract.ps1"
+    ),
+}
+_GENERATED_COMPUTE_INIT = (
+    '"""Minimal E37 worker projection; import the contract module explicitly."""\n'
+)
+_INPUT_FILES = {
+    "materialization": ("manifest.json", "materialized-items.jsonl"),
+    "engineering": ("manifest.json", "engineering-decisions.jsonl"),
+    "human": ("manifest.json", "review-decisions.jsonl"),
+}
+
+
+class E37WorkerPackageError(RuntimeError):
+    """The E37 package source or immutable package is invalid."""
+
+
+def build_e37_worker_package(
+    *,
+    repository_root: Path,
+    materialization_root: Path,
+    engineering_generation_root: Path,
+    human_generation_root: Path,
+    profile_path: Path,
+    output_root: Path,
+) -> Path:
+    """Build or verify one content-addressed E37 worker package."""
+
+    repository = repository_root.resolve(strict=True)
+    profile_source = profile_path.resolve(strict=True)
+    profile = _read_json(profile_source)
+    if profile.get("schema_version") != E37_PROFILE_SCHEMA:
+        raise E37WorkerPackageError("E37 package profile is incompatible")
+    roots = {
+        "materialization": materialization_root.resolve(strict=True),
+        "engineering": engineering_generation_root.resolve(strict=True),
+        "human": human_generation_root.resolve(strict=True),
+    }
+    expected_ids = {
+        "materialization": profile["source"]["materialization_id"],
+        "engineering": profile["source"]["engineering_generation_id"],
+        "human": profile["source"]["human_generation_id"],
+    }
+    sources: dict[str, Path | None] = {}
+    for target, relative in _RUNTIME_FILES.items():
+        source = None if relative is None else repository / relative
+        if source is not None and (not source.is_file() or source.is_symlink()):
+            raise E37WorkerPackageError(f"E37 runtime source is invalid: {relative}")
+        sources[target] = source
+    sources["profile.json"] = profile_source
+    for kind, filenames in _INPUT_FILES.items():
+        root = roots[kind]
+        if root.name != expected_ids[kind]:
+            raise E37WorkerPackageError(f"E37 {kind} identity changed")
+        for filename in filenames:
+            source = root / filename
+            if not source.is_file() or source.is_symlink():
+                raise E37WorkerPackageError(f"E37 {kind} artifact is invalid")
+            sources[f"input/{kind}/{root.name}/{filename}"] = source
+
+    descriptors = []
+    for relative, source in sorted(sources.items()):
+        payload = (
+            _GENERATED_COMPUTE_INIT.encode()
+            if source is None
+            else source.read_bytes()
+        )
+        descriptors.append(
+            {
+                "path": relative,
+                "byte_length": len(payload),
+                "sha256": hashlib.sha256(payload).hexdigest(),
+            }
+        )
+    identity = {
+        "schema_version": E37_PACKAGE_SCHEMA,
+        "classification": "immutable-ravnoves00-r0-worker-input",
+        "source_ids": expected_ids,
+        "profile_sha256": _sha256(profile_source),
+        "artifact_paths": [row["path"] for row in descriptors],
+        "source_artifacts": descriptors,
+        "authority": {
+            "commands_enabled": False,
+            "navigation_or_safety_accepted": False,
+        },
+    }
+    identity_sha256 = hashlib.sha256(_canonical_json(identity)).hexdigest()
+    package_id = f"e37-worker-package-{identity_sha256}"
+    output = output_root.expanduser().absolute()
+    output.mkdir(mode=0o700, parents=True, exist_ok=True)
+    destination = output / package_id
+    if destination.exists():
+        validate_e37_worker_package(destination)
+        return destination
+
+    staging = output / f".{package_id}.{uuid.uuid4().hex}.tmp"
+    staging.mkdir(mode=0o700, exist_ok=False)
+    try:
+        for relative, source in sources.items():
+            target = staging / relative
+            target.parent.mkdir(mode=0o700, parents=True, exist_ok=True)
+            if source is None:
+                target.write_text(_GENERATED_COMPUTE_INIT, encoding="utf-8")
+            else:
+                shutil.copyfile(source, target)
+        artifacts = [
+            {
+                "kind": relative,
+                "path": relative,
+                "byte_length": (staging / relative).stat().st_size,
+                "sha256": _sha256(staging / relative),
+            }
+            for relative in sorted(sources)
+        ]
+        manifest = {
+            "schema_version": E37_PACKAGE_SCHEMA,
+            "package_id": package_id,
+            "identity_sha256": identity_sha256,
+            "identity": identity,
+            "created_at_utc": datetime.now(UTC)
+            .isoformat(timespec="milliseconds")
+            .replace("+00:00", "Z"),
+            "artifacts": artifacts,
+        }
+        _write_json(staging / "manifest.json", manifest)
+        validate_e37_worker_package(staging, allow_staging=True)
+        os.replace(staging, destination)
+    except BaseException:
+        shutil.rmtree(staging, ignore_errors=True)
+        raise
+    validate_e37_worker_package(destination)
+    return destination
+
+
+def validate_e37_worker_package(
+    root: Path,
+    *,
+    allow_staging: bool = False,
+) -> dict[str, Any]:
+    """Validate package identity, exact file set, and every member digest."""
+
+    resolved = root.resolve(strict=True)
+    manifest = _read_json(resolved / "manifest.json")
+    identity = manifest.get("identity")
+    identity_sha256 = manifest.get("identity_sha256")
+    package_id = manifest.get("package_id")
+    artifacts = manifest.get("artifacts")
+    expected_name = (
+        isinstance(package_id, str)
+        and (
+            resolved.name == package_id
+            or (
+                allow_staging
+                and resolved.name.startswith(f".{package_id}.")
+                and resolved.name.endswith(".tmp")
+            )
+        )
+    )
+    if (
+        manifest.get("schema_version") != E37_PACKAGE_SCHEMA
+        or not isinstance(identity, dict)
+        or not isinstance(identity_sha256, str)
+        or hashlib.sha256(_canonical_json(identity)).hexdigest() != identity_sha256
+        or package_id != f"e37-worker-package-{identity_sha256}"
+        or not expected_name
+        or not isinstance(artifacts, list)
+    ):
+        raise E37WorkerPackageError("E37 worker package identity is invalid")
+    expected_paths = set(identity.get("artifact_paths", []))
+    actual_paths = {
+        path.relative_to(resolved).as_posix()
+        for path in resolved.rglob("*")
+        if path.is_file()
+    }
+    if (
+        not expected_paths
+        or actual_paths != expected_paths | {"manifest.json"}
+        or len(artifacts) != len(expected_paths)
+    ):
+        raise E37WorkerPackageError("E37 worker package file set changed")
+    observed: set[str] = set()
+    for row in artifacts:
+        if not isinstance(row, dict):
+            raise E37WorkerPackageError("E37 worker package artifact is invalid")
+        relative = row.get("path")
+        path = resolved / str(relative)
+        if (
+            not isinstance(relative, str)
+            or relative not in expected_paths
+            or relative in observed
+            or Path(relative).is_absolute()
+            or ".." in Path(relative).parts
+            or not path.is_file()
+            or path.is_symlink()
+            or row.get("kind") != relative
+            or row.get("byte_length") != path.stat().st_size
+            or row.get("sha256") != _sha256(path)
+        ):
+            raise E37WorkerPackageError("E37 worker package artifact changed")
+        observed.add(relative)
+    if observed != expected_paths:
+        raise E37WorkerPackageError("E37 worker package artifact coverage changed")
+    return manifest
+
+
+def _canonical_json(value: object) -> bytes:
+    return json.dumps(
+        value,
+        sort_keys=True,
+        separators=(",", ":"),
+        allow_nan=False,
+    ).encode()
+
+
+def _sha256(path: Path) -> str:
+    digest = hashlib.sha256()
+    with path.open("rb") as stream:
+        while chunk := stream.read(1024 * 1024):
+            digest.update(chunk)
+    return digest.hexdigest()
+
+
+def _read_json(path: Path) -> dict[str, Any]:
+    value = json.loads(path.read_text(encoding="utf-8-sig"))
+    if not isinstance(value, dict):
+        raise E37WorkerPackageError(f"JSON object expected: {path.name}")
+    return value
+
+
+def _write_json(path: Path, value: object) -> None:
+    with path.open("x", encoding="utf-8", newline="\n") as stream:
+        json.dump(value, stream, indent=2, sort_keys=True)
+        stream.write("\n")
+        stream.flush()
+        os.fsync(stream.fileno())
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--repository-root", type=Path, required=True)
+    parser.add_argument("--materialization", type=Path, required=True)
+    parser.add_argument("--engineering-generation", type=Path, required=True)
+    parser.add_argument("--human-generation", type=Path, required=True)
+    parser.add_argument("--profile", type=Path, required=True)
+    parser.add_argument("--output-root", type=Path, required=True)
+    args = parser.parse_args()
+    package = build_e37_worker_package(
+        repository_root=args.repository_root,
+        materialization_root=args.materialization,
+        engineering_generation_root=args.engineering_generation,
+        human_generation_root=args.human_generation,
+        profile_path=args.profile,
+        output_root=args.output_root,
+    )
+    print(package)
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
diff --git a/experiments/perception/run_e37_acceptance_contract.py b/experiments/perception/run_e37_acceptance_contract.py
new file mode 100644
index 0000000..8ef93c2
--- /dev/null
+++ b/experiments/perception/run_e37_acceptance_contract.py
@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+"""Build the immutable RAVNOVES00 R0 acceptance contract."""
+
+from __future__ import annotations
+
+import argparse
+import json
+import os
+from pathlib import Path
+
+from k1link.compute.e37_acceptance_contract import (
+    build_e37_acceptance_contract,
+)
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--materialization", type=Path, required=True)
+    parser.add_argument("--engineering-generation", type=Path, required=True)
+    parser.add_argument("--human-generation", type=Path, required=True)
+    parser.add_argument("--profile", type=Path, required=True)
+    parser.add_argument("--output-root", type=Path, required=True)
+    parser.add_argument("--worker-node", default=os.environ.get("COMPUTERNAME"))
+    args = parser.parse_args()
+    result = build_e37_acceptance_contract(
+        materialization_root=args.materialization,
+        engineering_generation_root=args.engineering_generation,
+        human_generation_root=args.human_generation,
+        profile_path=args.profile,
+        output_root=args.output_root,
+        worker_node=args.worker_node,
+    )
+    print(
+        json.dumps(
+            {
+                "result_id": result.result_id,
+                "result_root": str(result.result_root),
+                "accepted": result.accepted,
+                "metrics": result.report["metrics"],
+                "rejection_reasons": result.report["acceptance"][
+                    "rejection_reasons"
+                ],
+            },
+            ensure_ascii=False,
+            sort_keys=True,
+        )
+    )
+    return 0 if result.accepted else 2
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
diff --git a/experiments/perception/worker/Invoke-E37AcceptanceContract.ps1 b/experiments/perception/worker/Invoke-E37AcceptanceContract.ps1
new file mode 100644
index 0000000..908995c
--- /dev/null
+++ b/experiments/perception/worker/Invoke-E37AcceptanceContract.ps1
@@ -0,0 +1,134 @@
+[CmdletBinding()]
+param(
+    [Parameter(Mandatory = $true)]
+    [string]$PackageRoot,
+    [string]$OutputRoot = "D:\NDC_MISSIONCORE\runtime\derived\e37-acceptance",
+    [string]$ContainerImage = "nvcr.io/nvidia/tritonserver:26.06-py3@sha256:58df7489c3f2276f9591d500a012dee03e23d35543ce3c390b4c001e6bf90794",
+    [ValidateRange(1, 1000)]
+    [int]$FreeGiBFloor = 300
+)
+
+$ErrorActionPreference = "Stop"
+$ProgressPreference = "SilentlyContinue"
+
+function Assert-LastExitCode([string]$Operation) {
+    if ($LASTEXITCODE -ne 0) {
+        throw "$Operation failed with exit code $LASTEXITCODE"
+    }
+}
+
+function Resolve-DDirectory([string]$Path, [string]$Label) {
+    $item = Get-Item -LiteralPath (Resolve-Path -LiteralPath $Path).Path -Force
+    $root = [IO.Path]::GetPathRoot($item.FullName).TrimEnd("\")
+    if (
+        -not $item.PSIsContainer -or
+        ($item.Attributes -band [IO.FileAttributes]::ReparsePoint) -or
+        $root -ine "D:"
+    ) {
+        throw "$Label must be a real D: directory"
+    }
+    return $item.FullName
+}
+
+function Convert-ToDockerPath([string]$Path) {
+    return $Path.Replace("\", "/")
+}
+
+function Assert-FreeSpace([string]$Phase) {
+    $free = [int64](Get-PSDrive -Name D).Free
+    $floor = [int64]$FreeGiBFloor * 1GB
+    Write-Host (
+        "DISK_GUARD PHASE={0} DRIVE=D FREE_BYTES={1} FREE_GIB={2} FLOOR_GIB={3}" -f
+        $Phase, $free, [math]::Round($free / 1GB, 3), $FreeGiBFloor
+    )
+    if ($free -lt ($floor + 1GB)) {
+        throw "D: lacks the guarded E37 reserve during $Phase"
+    }
+    return $free
+}
+
+$package = Resolve-DDirectory $PackageRoot "E37 package"
+$packageManifestPath = Join-Path $package "manifest.json"
+if (-not (Test-Path -LiteralPath $packageManifestPath -PathType Leaf)) {
+    throw "E37 package manifest is missing"
+}
+$packageManifest = Get-Content -LiteralPath $packageManifestPath -Raw |
+    ConvertFrom-Json
+if (
+    $packageManifest.schema_version -ne "missioncore.e37-worker-package/v1" -or
+    $packageManifest.package_id -ne (Split-Path $package -Leaf) -or
+    $packageManifest.package_id -notmatch "^e37-worker-package-[a-f0-9]{64}$"
+) {
+    throw "E37 package manifest is incompatible"
+}
+
+if (-not (Test-Path -LiteralPath $OutputRoot)) {
+    $null = New-Item -ItemType Directory -Path $OutputRoot
+}
+$output = Resolve-DDirectory $OutputRoot "E37 output root"
+$freeBefore = Assert-FreeSpace "preflight"
+
+& docker image inspect $ContainerImage *> $null
+Assert-LastExitCode "Pinned E37 container image inspection"
+
+$dockerPackage = Convert-ToDockerPath $package
+$dockerOutput = Convert-ToDockerPath $output
+$packageName = Split-Path $package -Leaf
+$containerPackage = "/opt/e37-input/$packageName"
+$command = @(
+    "run", "--rm",
+    "--network", "none",
+    "--read-only",
+    "--security-opt", "no-new-privileges:true",
+    "--cap-drop", "ALL",
+    "--pids-limit", "128",
+    "--tmpfs", "/tmp:rw,noexec,nosuid,size=64m",
+    "-e", "PYTHONDONTWRITEBYTECODE=1",
+    "-e", ("PYTHONPATH={0}/runtime" -f $containerPackage),
+    "-e", ("E37_WORKER_NODE={0}" -f $env:COMPUTERNAME),
+    "-v", ("{0}:{1}:ro" -f $dockerPackage, $containerPackage),
+    "-v", ("{0}:/output:rw" -f $dockerOutput),
+    "--entrypoint", "python3",
+    $ContainerImage,
+    ("{0}/runtime/run_e37_acceptance_contract.py" -f $containerPackage),
+    "--package", $containerPackage,
+    "--output-root", "/output"
+)
+
+Write-Output ("PACKAGE_ID={0}" -f $packageManifest.package_id)
+Write-Output ("PACKAGE_IDENTITY_SHA256={0}" -f $packageManifest.identity_sha256)
+Write-Output ("CONTAINER_IMAGE={0}" -f $ContainerImage)
+& docker @command
+Assert-LastExitCode "E37 acceptance contract"
+
+$matches = @(
+    Get-ChildItem -LiteralPath $output -Directory -Filter "e37-ravnoves-acceptance-*" |
+        Where-Object {
+            $manifestPath = Join-Path $_.FullName "manifest.json"
+            if (-not (Test-Path -LiteralPath $manifestPath -PathType Leaf)) {
+                return $false
+            }
+            $manifest = Get-Content -LiteralPath $manifestPath -Raw |
+                ConvertFrom-Json
+            return (
+                $manifest.schema_version -eq
+                    "missioncore.e37-acceptance-contract/v1" -and
+                $manifest.acceptance_state -eq
+                    "accepted-r0-source-scoped-contract" -and
+                $manifest.identity.execution.worker_node -eq $env:COMPUTERNAME
+            )
+        }
+)
+if ($matches.Count -ne 1) {
+    throw "E37 immutable result could not be resolved uniquely"
+}
+$resultRoot = $matches[0].FullName
+$resultManifest = Get-Content -LiteralPath (
+    Join-Path $resultRoot "manifest.json"
+) -Raw | ConvertFrom-Json
+$freeAfter = Assert-FreeSpace "completed"
+Write-Output ("RESULT_ROOT={0}" -f $resultRoot)
+Write-Output ("RESULT_ID={0}" -f $resultManifest.result_id)
+Write-Output ("ACCEPTANCE_STATE={0}" -f $resultManifest.acceptance_state)
+Write-Output ("DISK_FREE_BYTES_BEFORE={0}" -f $freeBefore)
+Write-Output ("DISK_FREE_BYTES_AFTER={0}" -f $freeAfter)
diff --git a/experiments/perception/worker/run_e37_acceptance_contract.py b/experiments/perception/worker/run_e37_acceptance_contract.py
new file mode 100644
index 0000000..8b5d004
--- /dev/null
+++ b/experiments/perception/worker/run_e37_acceptance_contract.py
@@ -0,0 +1,128 @@
+#!/usr/bin/env python3
+"""Execute one immutable E37 package inside the bounded worker container."""
+
+from __future__ import annotations
+
+import argparse
+import hashlib
+import json
+import os
+from pathlib import Path
+from typing import Any
+
+from k1link.compute.e37_acceptance_contract import (
+    E37_PACKAGE_SCHEMA,
+    build_e37_acceptance_contract,
+)
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--package", type=Path, required=True)
+    parser.add_argument("--output-root", type=Path, required=True)
+    args = parser.parse_args()
+    package = args.package.resolve(strict=True)
+    manifest = _validate_package(package)
+    source_ids = manifest["identity"]["source_ids"]
+    result = build_e37_acceptance_contract(
+        materialization_root=(
+            package / "input" / "materialization" / source_ids["materialization"]
+        ),
+        engineering_generation_root=(
+            package / "input" / "engineering" / source_ids["engineering"]
+        ),
+        human_generation_root=(
+            package / "input" / "human" / source_ids["human"]
+        ),
+        profile_path=package / "profile.json",
+        output_root=args.output_root,
+        worker_node=os.environ.get("E37_WORKER_NODE"),
+    )
+    print(
+        json.dumps(
+            {
+                "package_id": manifest["package_id"],
+                "result_id": result.result_id,
+                "result_root": str(result.result_root),
+                "accepted": result.accepted,
+                "metrics": result.report["metrics"],
+            },
+            ensure_ascii=False,
+            sort_keys=True,
+        )
+    )
+    return 0 if result.accepted else 2
+
+
+def _validate_package(root: Path) -> dict[str, Any]:
+    manifest = _read_json(root / "manifest.json")
+    identity = manifest.get("identity")
+    identity_sha256 = manifest.get("identity_sha256")
+    package_id = manifest.get("package_id")
+    artifacts = manifest.get("artifacts")
+    if (
+        manifest.get("schema_version") != E37_PACKAGE_SCHEMA
+        or not isinstance(identity, dict)
+        or not isinstance(identity_sha256, str)
+        or hashlib.sha256(_canonical_json(identity)).hexdigest() != identity_sha256
+        or package_id != f"e37-worker-package-{identity_sha256}"
+        or root.name != package_id
+        or not isinstance(artifacts, list)
+    ):
+        raise RuntimeError("E37 worker package identity is invalid")
+    expected = set(identity.get("artifact_paths", []))
+    actual = {
+        path.relative_to(root).as_posix()
+        for path in root.rglob("*")
+        if path.is_file()
+    }
+    if actual != expected | {"manifest.json"} or len(artifacts) != len(expected):
+        raise RuntimeError("E37 worker package file set changed")
+    observed: set[str] = set()
+    for row in artifacts:
+        relative = row.get("path") if isinstance(row, dict) else None
+        path = root / str(relative)
+        if (
+            not isinstance(relative, str)
+            or relative not in expected
+            or relative in observed
+            or Path(relative).is_absolute()
+            or ".." in Path(relative).parts
+            or not path.is_file()
+            or path.is_symlink()
+            or row.get("byte_length") != path.stat().st_size
+            or row.get("sha256") != _sha256(path)
+        ):
+            raise RuntimeError("E37 worker package artifact changed")
+        observed.add(relative)
+    if observed != expected:
+        raise RuntimeError("E37 worker package artifact coverage changed")
+    return manifest
+
+
+def _canonical_json(value: object) -> bytes:
+    return json.dumps(
+        value,
+        sort_keys=True,
+        separators=(",", ":"),
+        allow_nan=False,
+    ).encode()
+
+
+def _sha256(path: Path) -> str:
+    digest = hashlib.sha256()
+    with path.open("rb") as stream:
+        while chunk := stream.read(1024 * 1024):
+            digest.update(chunk)
+    return digest.hexdigest()
+
+
+def _read_json(path: Path) -> dict[str, Any]:
+    value = json.loads(path.read_text(encoding="utf-8-sig"))
+    if not isinstance(value, dict):
+        raise RuntimeError(f"JSON object expected: {path.name}")
+    return value
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
diff --git a/src/k1link/compute/e37_acceptance_contract.py b/src/k1link/compute/e37_acceptance_contract.py
new file mode 100644
index 0000000..93625cb
--- /dev/null
+++ b/src/k1link/compute/e37_acceptance_contract.py
@@ -0,0 +1,728 @@
+"""Freeze the RAVNOVES00 R0 acceptance denominator and validation split."""
+
+from __future__ import annotations
+
+import hashlib
+import json
+import os
+import shutil
+import uuid
+from collections import Counter, defaultdict
+from dataclasses import dataclass
+from datetime import UTC, datetime
+from pathlib import Path
+from typing import Any, Final, Literal
+
+E37_PROFILE_SCHEMA: Final = "missioncore.e37-acceptance-profile/v1"
+E37_PACKAGE_SCHEMA: Final = "missioncore.e37-worker-package/v1"
+E37_RESULT_SCHEMA: Final = "missioncore.e37-acceptance-contract/v1"
+E37_ITEM_SCHEMA: Final = "missioncore.e37-acceptance-item/v1"
+E37_REPORT_SCHEMA: Final = "missioncore.e37-acceptance-report/v1"
+E37_CONTRACT_SCHEMA: Final = "missioncore.ravnoves00-acceptance-contract/v1"
+
+E37_ITEMS_NAME: Final = "acceptance-items.jsonl"
+E37_CONTRACT_NAME: Final = "acceptance-contract.json"
+E37_REPORT_NAME: Final = "run-report.json"
+E37_MANIFEST_NAME: Final = "manifest.json"
+
+_MATERIALIZATION_SCHEMA: Final = "missioncore.e30-evidence-materialization/v2"
+_ENGINEERING_SCHEMA: Final = "missioncore.e30-engineering-generation/v1"
+_HUMAN_SCHEMA: Final = "missioncore.e30-human-review-generation/v2"
+_SOURCE_SESSION_ID: Final = "20260720T065719Z_viewer_live"
+_SOURCE_DISPLAY_NAME: Final = "RAVNOVES00"
+_AUTHORITY: Final = {
+    "commands_enabled": False,
+    "navigation_or_safety_accepted": False,
+}
+
+PresenceLabel = Literal[
+    "object-present",
+    "occupied-environment",
+    "background-or-noise",
+    "unknown",
+]
+GeometryLabel = Literal[
+    "object-associated",
+    "independent-occupied",
+    "rejected-nonobject",
+    "insufficient-support",
+    "unknown",
+]
+FreshnessLabel = Literal["current", "held", "stale", "unavailable", "unknown"]
+SplitName = Literal["development", "validation"]
+
+
+class E37AcceptanceContractError(RuntimeError):
+    """The R0 profile, source review, or immutable result is invalid."""
+
+
+@dataclass(frozen=True, slots=True)
+class E37AcceptanceContract:
+    result_id: str
+    result_root: Path
+    manifest: dict[str, Any]
+    contract: dict[str, Any]
+    report: dict[str, Any]
+
+    @property
+    def accepted(self) -> bool:
+        return self.report.get("acceptance", {}).get("accepted") is True
+
+
+def derive_reference_labels(
+    decision: dict[str, Any],
+    human_disposition: str | None,
+) -> tuple[PresenceLabel, GeometryLabel, FreshnessLabel]:
+    """Project the reviewed E30 decision into the frozen R0 task ontology."""
+
+    detector = decision.get("detector_assessment")
+    ownership = decision.get("point_ownership")
+    cause = decision.get("cause_code")
+    effective_stratum = decision.get("effective_stratum")
+
+    if human_disposition == "object-present":
+        presence: PresenceLabel = "occupied-environment"
+        geometry: GeometryLabel = "independent-occupied"
+    elif human_disposition == "background-or-noise":
+        presence = "background-or-noise"
+        geometry = "rejected-nonobject"
+    elif human_disposition == "insufficient-evidence":
+        presence = "unknown"
+        geometry = "unknown"
+    elif detector in {"valid", "class-mismatch", "missed-object"}:
+        presence = "object-present"
+        geometry = _geometry_label(ownership)
+    elif detector == "false-positive":
+        presence = "background-or-noise"
+        geometry = _geometry_label(ownership)
+    elif detector == "not-applicable":
+        if ownership == "object":
+            presence = "object-present"
+        elif ownership == "static-environment":
+            presence = "occupied-environment"
+        elif ownership in {"surface-or-background", "self"}:
+            presence = "background-or-noise"
+        else:
+            presence = "unknown"
+        geometry = _geometry_label(ownership)
+    else:
+        presence = "unknown"
+        geometry = _geometry_label(ownership)
+
+    if cause == "time_mismatch":
+        freshness: FreshnessLabel = "stale"
+    elif effective_stratum in {"camera-only", "unknown"} or ownership in {
+        "insufficient-support",
+        "insufficient-evidence",
+    }:
+        freshness = "unavailable"
+    else:
+        freshness = "current"
+    return presence, geometry, freshness
+
+
+def assign_split(
+    rows: list[dict[str, Any]],
+    *,
+    seed: str,
+    validation_fraction: float,
+) -> dict[str, SplitName]:
+    """Assign a deterministic source-stratum/range-balanced holdout."""
+
+    if not seed or not 0.1 <= validation_fraction <= 0.5:
+        raise E37AcceptanceContractError("E37 split profile is invalid")
+    grouped: dict[tuple[str, str], list[dict[str, Any]]] = defaultdict(list)
+    for row in rows:
+        item_id = row.get("item_id")
+        stratum = row.get("source_stratum")
+        range_bucket = row.get("range_bucket")
+        if not all(isinstance(value, str) and value for value in (
+            item_id,
+            stratum,
+            range_bucket,
+        )):
+            raise E37AcceptanceContractError("E37 split source row is invalid")
+        grouped[(stratum, range_bucket)].append(row)
+
+    assignments: dict[str, SplitName] = {}
+    for group_rows in grouped.values():
+        ordered = sorted(
+            group_rows,
+            key=lambda row: hashlib.sha256(
+                f"{seed}:{row['item_id']}".encode()
+            ).hexdigest(),
+        )
+        validation_count = round(len(ordered) * validation_fraction)
+        if len(ordered) > 1:
+            validation_count = min(len(ordered) - 1, max(1, validation_count))
+        else:
+            validation_count = 0
+        for index, row in enumerate(ordered):
+            assignments[row["item_id"]] = (
+                "validation" if index < validation_count else "development"
+            )
+    if set(assignments) != {row["item_id"] for row in rows}:
+        raise E37AcceptanceContractError("E37 split accounting is incomplete")
+    return assignments
+
+
+def build_e37_acceptance_contract(
+    *,
+    materialization_root: Path,
+    engineering_generation_root: Path,
+    human_generation_root: Path,
+    profile_path: Path,
+    output_root: Path,
+    worker_node: str | None = None,
+) -> E37AcceptanceContract:
+    """Build or verify one immutable source-scoped R0 contract."""
+
+    profile_file = profile_path.resolve(strict=True)
+    profile = _read_json(profile_file)
+    _validate_profile(profile)
+    materialization = materialization_root.resolve(strict=True)
+    engineering = engineering_generation_root.resolve(strict=True)
+    human = human_generation_root.resolve(strict=True)
+    inputs = _load_inputs(materialization, engineering, human, profile)
+
+    identity = {
+        "schema_version": E37_RESULT_SCHEMA,
+        "source": {
+            "session_id": _SOURCE_SESSION_ID,
+            "display_name": _SOURCE_DISPLAY_NAME,
+            "classification": "immutable-private-physical-recording",
+        },
+        "profile": {
+            "profile_id": profile["profile_id"],
+            "sha256": _sha256(profile_file),
+        },
+        "reviewed_substrate": inputs["bindings"],
+        "split": profile["split"],
+        "ontology": profile["ontology"],
+        "metrics": profile["metrics"],
+        "severity": profile["severity"],
+        "execution": {
+            "class": "deterministic-offline-contract-build",
+            "worker_node": worker_node or "unbound-local",
+        },
+        "authority": _AUTHORITY,
+    }
+    identity_sha256 = hashlib.sha256(_canonical_json(identity)).hexdigest()
+    result_id = f"e37-ravnoves-acceptance-{identity_sha256}"
+    destination = output_root.expanduser().absolute() / result_id
+    if destination.exists():
+        return read_e37_acceptance_contract(destination)
+
+    materialization_by_id = {
+        row["item_id"]: row for row in inputs["materialization_rows"]
+    }
+    engineering_rows = inputs["engineering_rows"]
+    human_by_id = {
+        row["item_id"]: row for row in inputs["human_rows"]
+    }
+    joined_for_split = []
+    for decision in engineering_rows:
+        source = materialization_by_id.get(decision["item_id"])
+        if source is None:
+            raise E37AcceptanceContractError(
+                "E37 engineering/materialization accounting differs"
+            )
+        joined_for_split.append(
+            {
+                "item_id": decision["item_id"],
+                "source_stratum": decision["source_stratum"],
+                "range_bucket": source["range_bucket"],
+            }
+        )
+    assignments = assign_split(
+        joined_for_split,
+        seed=profile["split"]["seed"],
+        validation_fraction=float(profile["split"]["validation_fraction"]),
+    )
+
+    items: list[dict[str, Any]] = []
+    for decision in engineering_rows:
+        item_id = decision["item_id"]
+        source = materialization_by_id[item_id]
+        human_row = human_by_id.get(item_id)
+        human_disposition = (
+            human_row.get("disposition") if human_row is not None else None
+        )
+        if decision.get("human_exception_required") is True and human_row is None:
+            raise E37AcceptanceContractError("E37 human exception is unresolved")
+        if decision.get("human_exception_required") is not True and human_row is not None:
+            raise E37AcceptanceContractError("E37 human review escaped its exception set")
+        presence, geometry, freshness = derive_reference_labels(
+            decision,
+            human_disposition,
+        )
+        item = {
+            "schema_version": E37_ITEM_SCHEMA,
+            "sequence": len(items),
+            "item_id": item_id,
+            "review_key": decision["review_key"],
+            "source_frame_index": source["evidence_binding"]["source_frame_index"],
+            "session_seconds": source["evidence_binding"]["session_seconds"],
+            "source_stratum": decision["source_stratum"],
+            "range_bucket": source["range_bucket"],
+            "severity": _severity(decision, human_disposition),
+            "split": assignments[item_id],
+            "reference": {
+                "presence": presence,
+                "geometry_association": geometry,
+                "freshness": freshness,
+            },
+            "provenance": {
+                "engineering_verdict": decision["verdict"],
+                "engineering_confidence": decision["confidence"],
+                "human_exception": human_row is not None,
+                "human_disposition": human_disposition,
+            },
+            "authority": _AUTHORITY,
+        }
+        items.append(item)
+
+    contract = _contract_document(
+        result_id=result_id,
+        identity_sha256=identity_sha256,
+        profile=profile,
+        items=items,
+    )
+    report = _report_document(
+        result_id=result_id,
+        identity_sha256=identity_sha256,
+        profile=profile,
+        items=items,
+        execution=identity["execution"],
+    )
+
+    destination.parent.mkdir(mode=0o700, parents=True, exist_ok=True)
+    staging = destination.parent / f".{result_id}.{uuid.uuid4().hex}.tmp"
+    staging.mkdir(mode=0o700, exist_ok=False)
+    try:
+        _write_jsonl(staging / E37_ITEMS_NAME, items)
+        _write_json(staging / E37_CONTRACT_NAME, contract)
+        _write_json(staging / E37_REPORT_NAME, report)
+        artifacts = [
+            _artifact(staging / E37_ITEMS_NAME, "reviewed-denominator"),
+            _artifact(staging / E37_CONTRACT_NAME, "acceptance-contract"),
+            _artifact(staging / E37_REPORT_NAME, "run-report"),
+        ]
+        manifest = {
+            "schema_version": E37_RESULT_SCHEMA,
+            "result_id": result_id,
+            "identity_sha256": identity_sha256,
+            "identity": identity,
+            "created_at_utc": _utc_now(),
+            "acceptance_state": "accepted-r0-source-scoped-contract",
+            "artifacts": artifacts,
+        }
+        _write_json(staging / E37_MANIFEST_NAME, manifest)
+        os.replace(staging, destination)
+    except BaseException:
+        shutil.rmtree(staging, ignore_errors=True)
+        raise
+    return read_e37_acceptance_contract(destination)
+
+
+def read_e37_acceptance_contract(root: Path) -> E37AcceptanceContract:
+    resolved = root.resolve(strict=True)
+    manifest = _read_json(resolved / E37_MANIFEST_NAME)
+    identity = _object(manifest.get("identity"), "E37 identity")
+    identity_sha256 = manifest.get("identity_sha256")
+    if (
+        manifest.get("schema_version") != E37_RESULT_SCHEMA
+        or not isinstance(identity_sha256, str)
+        or hashlib.sha256(_canonical_json(identity)).hexdigest() != identity_sha256
+        or manifest.get("result_id") != f"e37-ravnoves-acceptance-{identity_sha256}"
+        or resolved.name != manifest.get("result_id")
+        or manifest.get("acceptance_state") != "accepted-r0-source-scoped-contract"
+        or identity.get("authority") != _AUTHORITY
+    ):
+        raise E37AcceptanceContractError("E37 result identity is invalid")
+    artifacts = manifest.get("artifacts")
+    if not isinstance(artifacts, list) or len(artifacts) != 3:
+        raise E37AcceptanceContractError("E37 artifact catalog is invalid")
+    expected = {
+        E37_ITEMS_NAME: "reviewed-denominator",
+        E37_CONTRACT_NAME: "acceptance-contract",
+        E37_REPORT_NAME: "run-report",
+    }
+    for row in artifacts:
+        if not isinstance(row, dict):
+            raise E37AcceptanceContractError("E37 artifact descriptor is invalid")
+        name = row.get("path")
+        if name not in expected or row.get("role") != expected[name]:
+            raise E37AcceptanceContractError("E37 artifact role changed")
+        path = resolved / name
+        if (
+            not path.is_file()
+            or path.is_symlink()
+            or row.get("byte_length") != path.stat().st_size
+            or row.get("sha256") != _sha256(path)
+        ):
+            raise E37AcceptanceContractError("E37 artifact content changed")
+    contract = _read_json(resolved / E37_CONTRACT_NAME)
+    report = _read_json(resolved / E37_REPORT_NAME)
+    if (
+        contract.get("schema_version") != E37_CONTRACT_SCHEMA
+        or report.get("schema_version") != E37_REPORT_SCHEMA
+        or contract.get("result_id") != resolved.name
+        or report.get("result_id") != resolved.name
+        or report.get("acceptance", {}).get("accepted") is not True
+    ):
+        raise E37AcceptanceContractError("E37 contract or report is invalid")
+    return E37AcceptanceContract(
+        result_id=resolved.name,
+        result_root=resolved,
+        manifest=manifest,
+        contract=contract,
+        report=report,
+    )
+
+
+def _geometry_label(value: object) -> GeometryLabel:
+    return {
+        "object": "object-associated",
+        "static-environment": "independent-occupied",
+        "surface-or-background": "rejected-nonobject",
+        "self": "rejected-nonobject",
+        "insufficient-support": "insufficient-support",
+        "insufficient-evidence": "unknown",
+    }.get(str(value), "unknown")  # type: ignore[return-value]
+
+
+def _severity(
+    decision: dict[str, Any],
+    human_disposition: str | None,
+) -> str:
+    if human_disposition is not None:
+        return "high"
+    if decision.get("cause_code") in {"time_mismatch", "self_points"}:
+        return "high"
+    if decision.get("detector_assessment") == "missed-object":
+        return "high"
+    if decision.get("verdict") == "corrected":
+        return "medium"
+    return "standard"
+
+
+def _load_inputs(
+    materialization: Path,
+    engineering: Path,
+    human: Path,
+    profile: dict[str, Any],
+) -> dict[str, Any]:
+    materialization_manifest = _read_json(materialization / "manifest.json")
+    engineering_manifest = _read_json(engineering / "manifest.json")
+    human_manifest = _read_json(human / "manifest.json")
+    if (
+        materialization_manifest.get("schema_version") != _MATERIALIZATION_SCHEMA
+        or materialization.name != profile["source"]["materialization_id"]
+        or materialization_manifest.get("result_id") != materialization.name
+        or engineering_manifest.get("schema_version") != _ENGINEERING_SCHEMA
+        or engineering.name != profile["source"]["engineering_generation_id"]
+        or engineering_manifest.get("result_id") != engineering.name
+        or human_manifest.get("schema_version") != _HUMAN_SCHEMA
+        or human.name != profile["source"]["human_generation_id"]
+        or human_manifest.get("result_id") != human.name
+    ):
+        raise E37AcceptanceContractError("E37 input identity is invalid")
+    materialization_index = materialization / "materialized-items.jsonl"
+    engineering_decisions = engineering / "engineering-decisions.jsonl"
+    human_decisions = human / "review-decisions.jsonl"
+    for path in (materialization_index, engineering_decisions, human_decisions):
+        if not path.is_file() or path.is_symlink():
+            raise E37AcceptanceContractError("E37 input artifact is unavailable")
+    materialization_rows = _read_jsonl(materialization_index)
+    engineering_rows = _read_jsonl(engineering_decisions)
+    human_rows = _read_jsonl(human_decisions)
+    expected = int(profile["denominator"]["expected_items"])
+    if (
+        len(materialization_rows) != expected
+        or len(engineering_rows) != expected
+        or len({row.get("item_id") for row in materialization_rows}) != expected
+        or len({row.get("item_id") for row in engineering_rows}) != expected
+        or {row.get("item_id") for row in materialization_rows}
+        != {row.get("item_id") for row in engineering_rows}
+        or {row.get("item_id") for row in human_rows}
+        != {
+            row.get("item_id")
+            for row in engineering_rows
+            if row.get("human_exception_required") is True
+        }
+    ):
+        raise E37AcceptanceContractError("E37 reviewed denominator is incomplete")
+    source_binding = materialization_manifest.get("identity", {}).get("source", {})
+    if source_binding.get("source_session_id") != _SOURCE_SESSION_ID:
+        raise E37AcceptanceContractError("E37 source session changed")
+    return {
+        "materialization_rows": materialization_rows,
+        "engineering_rows": engineering_rows,
+        "human_rows": human_rows,
+        "bindings": {
+            "materialization_id": materialization.name,
+            "materialization_identity_sha256": materialization_manifest.get(
+                "identity_sha256"
+            ),
+            "materialization_manifest_sha256": _sha256(
+                materialization / "manifest.json"
+            ),
+            "materialization_index_sha256": _sha256(materialization_index),
+            "engineering_generation_id": engineering.name,
+            "engineering_identity_sha256": engineering_manifest.get(
+                "identity_sha256"
+            ),
+            "engineering_manifest_sha256": _sha256(engineering / "manifest.json"),
+            "engineering_decisions_sha256": _sha256(engineering_decisions),
+            "human_generation_id": human.name,
+            "human_identity_sha256": human_manifest.get("identity_sha256"),
+            "human_manifest_sha256": _sha256(human / "manifest.json"),
+            "human_decisions_sha256": _sha256(human_decisions),
+        },
+    }
+
+
+def _validate_profile(profile: dict[str, Any]) -> None:
+    source = _object(profile.get("source"), "E37 source")
+    denominator = _object(profile.get("denominator"), "E37 denominator")
+    split = _object(profile.get("split"), "E37 split")
+    metrics = _object(profile.get("metrics"), "E37 metrics")
+    authority = _object(profile.get("authority"), "E37 authority")
+    ontology = _object(profile.get("ontology"), "E37 ontology")
+    if (
+        profile.get("schema_version") != E37_PROFILE_SCHEMA
+        or profile.get("profile_id") != "e37-ravnoves00-r0-acceptance/v1"
+        or source.get("session_id") != _SOURCE_SESSION_ID
+        or source.get("display_name") != _SOURCE_DISPLAY_NAME
+        or denominator.get("expected_items") != 486
+        or split.get("strategy")
+        != "deterministic-source-stratum-range-holdout"
+        or not isinstance(split.get("seed"), str)
+        or not 0.1 <= float(split.get("validation_fraction", 0)) <= 0.5
+        or metrics.get("presence_target") != 0.9
+        or metrics.get("geometry_association_target") != 0.9
+        or metrics.get("freshness_target") != 0.9
+        or metrics.get("accounting_target") != 1.0
+        or metrics.get("maximum_false_free_claims") != 0
+        or authority != _AUTHORITY
+        or sorted(ontology) != [
+            "freshness",
+            "geometry_association",
+            "presence",
+        ]
+    ):
+        raise E37AcceptanceContractError("E37 profile contract changed")
+
+
+def _contract_document(
+    *,
+    result_id: str,
+    identity_sha256: str,
+    profile: dict[str, Any],
+    items: list[dict[str, Any]],
+) -> dict[str, Any]:
+    split_counts = Counter(item["split"] for item in items)
+    dimensions = {
+        name: Counter(item["reference"][name] for item in items)
+        for name in ("presence", "geometry_association", "freshness")
+    }
+    return {
+        "schema_version": E37_CONTRACT_SCHEMA,
+        "result_id": result_id,
+        "identity_sha256": identity_sha256,
+        "source_session_id": _SOURCE_SESSION_ID,
+        "denominator": {
+            "reviewed_items": len(items),
+            "development_items": split_counts["development"],
+            "validation_items": split_counts["validation"],
+            "terminal_outcomes": len(items),
+            "accounting_fraction": 1.0,
+        },
+        "split": profile["split"],
+        "ontology": profile["ontology"],
+        "dimension_distributions": {
+            name: dict(sorted(counts.items()))
+            for name, counts in dimensions.items()
+        },
+        "targets": profile["metrics"],
+        "severity_distribution": dict(
+            sorted(Counter(item["severity"] for item in items).items())
+        ),
+        "label_provenance": {
+            "engineering_items": sum(
+                not item["provenance"]["human_exception"] for item in items
+            ),
+            "human_exception_items": sum(
+                item["provenance"]["human_exception"] for item in items
+            ),
+            "independent_ground_truth": False,
+        },
+        "authority": _AUTHORITY,
+    }
+
+
+def _report_document(
+    *,
+    result_id: str,
+    identity_sha256: str,
+    profile: dict[str, Any],
+    items: list[dict[str, Any]],
+    execution: dict[str, Any],
+) -> dict[str, Any]:
+    split_counts = Counter(item["split"] for item in items)
+    false_free_claims = sum(
+        value == "free"
+        for item in items
+        for value in item["reference"].values()
+    )
+    checks = {
+        "source_identity_frozen": True,
+        "reviewed_denominator_complete": len(items) == 486,
+        "development_validation_split_complete": (
+            split_counts["development"] + split_counts["validation"] == len(items)
+            and split_counts["development"] > 0
+            and split_counts["validation"] > 0
+        ),
+        "every_dimension_has_terminal_label": all(
+            len(item["reference"]) == 3
+            and all(isinstance(value, str) and value for value in item["reference"].values())
+            for item in items
+        ),
+        "human_exception_accounting_complete": sum(
+            item["provenance"]["human_exception"] for item in items
+        )
+        == 2,
+        "false_free_claims_zero": false_free_claims == 0,
+        "authority_remains_diagnostic": True,
+    }
+    accepted = all(checks.values())
+    return {
+        "schema_version": E37_REPORT_SCHEMA,
+        "result_id": result_id,
+        "identity_sha256": identity_sha256,
+        "status": (
+            "accepted-r0-source-scoped-contract"
+            if accepted
+            else "rejected-r0-source-scoped-contract"
+        ),
+        "source_session_id": _SOURCE_SESSION_ID,
+        "profile_id": profile["profile_id"],
+        "execution": execution,
+        "metrics": {
+            "reviewed_items": len(items),
+            "development_items": split_counts["development"],
+            "validation_items": split_counts["validation"],
+            "engineering_items": len(items) - 2,
+            "human_exception_items": 2,
+            "terminal_outcomes": len(items),
+            "accounting_fraction": 1.0,
+            "false_free_claims": false_free_claims,
+        },
+        "acceptance": {
+            "accepted": accepted,
+            "checks": checks,
+            "rejection_reasons": [
+                name for name, passed in checks.items() if not passed
+            ],
+        },
+        "decision": {
+            "r0_contract_frozen": accepted,
+            "quality_target_evaluated": False,
+            "next_gate": "R1 source-scoped perception quality baseline",
+        },
+        "limitations": [
+            (
+                "labels are an engineering-reviewed source-scoped substrate, "
+                "not independent ground truth"
+            ),
+            (
+                "R0 freezes evaluation and does not claim that any 90 percent "
+                "quality target has passed"
+            ),
+            "RAVNOVES00 does not prove another route, camera, rig or mount",
+            "navigation, command and safety authority remain false",
+        ],
+        "authority": _AUTHORITY,
+    }
+
+
+def _artifact(path: Path, role: str) -> dict[str, Any]:
+    return {
+        "role": role,
+        "path": path.name,
+        "byte_length": path.stat().st_size,
+        "sha256": _sha256(path),
+    }
+
+
+def _object(value: object, label: str) -> dict[str, Any]:
+    if not isinstance(value, dict):
+        raise E37AcceptanceContractError(f"{label} must be an object")
+    return value
+
+
+def _read_json(path: Path) -> dict[str, Any]:
+    try:
+        value = json.loads(path.read_text(encoding="utf-8-sig"))
+    except (OSError, UnicodeDecodeError, json.JSONDecodeError) as exc:
+        raise E37AcceptanceContractError(f"invalid JSON: {path.name}") from exc
+    return _object(value, path.name)
+
+
+def _read_jsonl(path: Path) -> list[dict[str, Any]]:
+    rows: list[dict[str, Any]] = []
+    try:
+        with path.open("r", encoding="utf-8-sig") as stream:
+            for line in stream:
+                rows.append(_object(json.loads(line), path.name))
+    except (OSError, UnicodeDecodeError, json.JSONDecodeError) as exc:
+        raise E37AcceptanceContractError(f"invalid JSONL: {path.name}") from exc
+    return rows
+
+
+def _write_json(path: Path, value: object) -> None:
+    with path.open("x", encoding="utf-8", newline="\n") as stream:
+        json.dump(value, stream, ensure_ascii=False, indent=2, sort_keys=True)
+        stream.write("\n")
+        stream.flush()
+        os.fsync(stream.fileno())
+
+
+def _write_jsonl(path: Path, rows: list[dict[str, Any]]) -> None:
+    with path.open("x", encoding="utf-8", newline="\n") as stream:
+        for row in rows:
+            stream.write(
+                json.dumps(
+                    row,
+                    ensure_ascii=False,
+                    sort_keys=True,
+                    separators=(",", ":"),
+                    allow_nan=False,
+                )
+            )
+            stream.write("\n")
+        stream.flush()
+        os.fsync(stream.fileno())
+
+
+def _canonical_json(value: object) -> bytes:
+    return json.dumps(
+        value,
+        ensure_ascii=False,
+        sort_keys=True,
+        separators=(",", ":"),
+        allow_nan=False,
+    ).encode()
+
+
+def _sha256(path: Path) -> str:
+    digest = hashlib.sha256()
+    with path.open("rb") as stream:
+        while chunk := stream.read(1024 * 1024):
+            digest.update(chunk)
+    return digest.hexdigest()
+
+
+def _utc_now() -> str:
+    return datetime.now(UTC).isoformat(timespec="milliseconds").replace("+00:00", "Z")
diff --git a/tests/test_e37_acceptance_contract.py b/tests/test_e37_acceptance_contract.py
new file mode 100644
index 0000000..e67168c
--- /dev/null
+++ b/tests/test_e37_acceptance_contract.py
@@ -0,0 +1,98 @@
+from __future__ import annotations
+
+from collections import Counter
+
+import pytest
+
+from k1link.compute.e37_acceptance_contract import (
+    E37AcceptanceContractError,
+    assign_split,
+    derive_reference_labels,
+)
+
+
+def _decision(
+    *,
+    detector: str,
+    ownership: str,
+    cause: str | None = None,
+    effective_stratum: str | None = "agree",
+) -> dict[str, object]:
+    return {
+        "detector_assessment": detector,
+        "point_ownership": ownership,
+        "cause_code": cause,
+        "effective_stratum": effective_stratum,
+    }
+
+
+def test_r0_reference_projection_keeps_dimensions_independent() -> None:
+    assert derive_reference_labels(
+        _decision(detector="valid", ownership="object"),
+        None,
+    ) == ("object-present", "object-associated", "current")
+    assert derive_reference_labels(
+        _decision(
+            detector="false-positive",
+            ownership="surface-or-background",
+            cause="time_mismatch",
+        ),
+        None,
+    ) == ("background-or-noise", "rejected-nonobject", "stale")
+    assert derive_reference_labels(
+        _decision(
+            detector="not-applicable",
+            ownership="insufficient-support",
+            effective_stratum="camera-only",
+        ),
+        None,
+    ) == ("unknown", "insufficient-support", "unavailable")
+
+
+def test_human_exception_only_overrides_the_ambiguous_reference() -> None:
+    ambiguous = _decision(
+        detector="insufficient-evidence",
+        ownership="insufficient-evidence",
+        effective_stratum=None,
+    )
+    assert derive_reference_labels(ambiguous, "object-present") == (
+        "occupied-environment",
+        "independent-occupied",
+        "unavailable",
+    )
+    assert derive_reference_labels(ambiguous, "background-or-noise") == (
+        "background-or-noise",
+        "rejected-nonobject",
+        "unavailable",
+    )
+
+
+def test_split_is_deterministic_balanced_and_complete() -> None:
+    rows = [
+        {
+            "item_id": f"item-{index:03d}",
+            "source_stratum": "agree" if index % 2 else "conflict",
+            "range_bucket": "near" if index % 3 else "far",
+        }
+        for index in range(60)
+    ]
+    first = assign_split(
+        rows,
+        seed="frozen-seed",
+        validation_fraction=0.3,
+    )
+    second = assign_split(
+        list(reversed(rows)),
+        seed="frozen-seed",
+        validation_fraction=0.3,
+    )
+    assert first == second
+    assert set(first) == {row["item_id"] for row in rows}
+    assert Counter(first.values())["validation"] == 18
+
+
+def test_split_rejects_mutable_or_invalid_fraction() -> None:
+    with pytest.raises(E37AcceptanceContractError):
+        assign_split([], seed="", validation_fraction=0.3)
+    with pytest.raises(E37AcceptanceContractError):
+        assign_split([], seed="seed", validation_fraction=0.9)
diff --git a/tests/test_e37_worker_package.py b/tests/test_e37_worker_package.py
new file mode 100644
index 0000000..54415a8
--- /dev/null
+++ b/tests/test_e37_worker_package.py
@@ -0,0 +1,87 @@
+from __future__ import annotations
+
+import importlib.util
+import subprocess
+import sys
+from pathlib import Path
+
+
+def _module() -> object:
+    path = (
+        Path(__file__).resolve().parents[1]
+        / "experiments"
+        / "perception"
+        / "prepare_e37_worker_package.py"
+    )
+    spec = importlib.util.spec_from_file_location("e37_worker_package_test", path)
+    assert spec is not None and spec.loader is not None
+    module = importlib.util.module_from_spec(spec)
+    sys.modules[spec.name] = module
+    spec.loader.exec_module(module)
+    return module
+
+
+def test_e37_package_is_minimal_content_addressed_projection(tmp_path: Path) -> None:
+    module = _module()
+    repository = Path(__file__).resolve().parents[1]
+    runtime = repository / ".runtime" / "compute-experiments" / "e30"
+    package = module.build_e37_worker_package(
+        repository_root=repository,
+        materialization_root=(
+            runtime
+            / "materializations"
+            / (
+                "e30-materialization-"
+                "841af926d8d28ab93538c46d8f31278a2234c4d1c12c7dc4dc296b249d59735a"
+            )
+        ),
+        engineering_generation_root=(
+            runtime
+            / "engineering-generations"
+            / (
+                "e30-engineering-generation-"
+                "62a4fea10dea9b77f69ceac1af5bf0e4928d9c7716083c22258a03670fe5bd4f"
+            )
+        ),
+        human_generation_root=(
+            runtime
+            / "human-review-generations"
+            / (
+                "e30-review-generation-"
+                "7982a882558d0be690b4c7092e328c080bfcbf52478a220452be7e887a588250"
+            )
+        ),
+        profile_path=(
+            repository
+            / "experiments"
+            / "perception"
+            / "e37_ravnoves00_acceptance_profile.json"
+        ),
+        output_root=tmp_path,
+    )
+    manifest = module.validate_e37_worker_package(package)
+    assert package.name == f"e37-worker-package-{manifest['identity_sha256']}"
+    assert manifest["identity"]["classification"] == (
+        "immutable-ravnoves00-r0-worker-input"
+    )
+    assert len(manifest["artifacts"]) == 12
+    completed = subprocess.run(
+        [
+            sys.executable,
+            str(package / "runtime" / "run_e37_acceptance_contract.py"),
+            "--package",
+            str(package),
+            "--output-root",
+            str(tmp_path / "results"),
+        ],
+        env={
+            "PYTHONPATH": str(package / "runtime"),
+            "PYTHONDONTWRITEBYTECODE": "1",
+            "E37_WORKER_NODE": "TEST-WORKER-006",
+        },
+        check=False,
+        capture_output=True,
+        text=True,
+    )
+    assert completed.returncode == 0, completed.stderr
+    assert '"accepted": true' in completed.stdout