diff --git a/core/cli.py b/core/cli.py
index a978dcfa..cb292cd1 100644
--- a/core/cli.py
+++ b/core/cli.py
@@ -73,6 +73,12 @@ _TEST_SUITES: dict[str, tuple[str, ...]] = {
     "packs": (
         "tests/test_core_semantic_seed_pack.py",
         "tests/test_adr_0127_pack_ratification.py",
+        "tests/test_frame_registry_load.py",
+        "tests/test_composition_registry_load.py",
+        "tests/test_composition_consult_in_injector.py",
+        "tests/test_consumption_case_0050_hazard_pin.py",
+        "tests/test_consumption_empty_registry_no_op.py",
+        "tests/test_consumption_partition.py",
     ),
     "algebra": (
         "tests/test_versor_closure.py",
diff --git a/generate/comprehension/composition_registry.py b/generate/comprehension/composition_registry.py
new file mode 100644
index 00000000..7b06414a
--- /dev/null
+++ b/generate/comprehension/composition_registry.py
@@ -0,0 +1,274 @@
+"""CW-2 — runtime composition registry loader.
+
+Reads ``{pack}/compositions.jsonl`` (compiled by
+:mod:`language_packs.compile_compositions`) and exposes a frozen lookup
+surface for the recognizer/injector path.
+
+Structural twin of :mod:`generate.comprehension.frame_registry` plus
+two extra guards required by ADR-0169 / ADR-0169.1:
+
+1. **Allowlist enforced at load** — any entry whose
+   ``composition_category`` falls outside
+   :data:`teaching.math_composition_proposal.SAFE_COMPOSITION_CATEGORIES`
+   raises :class:`WrongCompositionCategory`. Defense in depth: protects
+   against pack edits that bypass the handler's own enforcement.
+
+2. **Polarity respected** — ``polarity: "falsifies"`` entries are
+   loaded and exposed; consumers MUST suppress an injection that would
+   have fired without the entry. Silently treating ``falsifies`` as
+   ``affirms`` is a discipline violation.
+
+Trust boundary identical to FrameRegistry: read-only over reviewed pack;
+no fallback to unsigned paths.
+"""
+
+from __future__ import annotations
+
+import hashlib
+import json
+import os
+import types
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Literal, Mapping
+
+from teaching.math_composition_ratification import SAFE_COMPOSITION_CATEGORIES
+
+
+class CompositionRegistryLoadError(ValueError):
+    """Raised on any load-time failure (checksum mismatch, malformed entry)."""
+
+
+class WrongCompositionCategory(CompositionRegistryLoadError):
+    """Raised when a compiled entry carries a category outside the allowlist."""
+
+
+Polarity = Literal["affirms", "falsifies"]
+
+
+@dataclass(frozen=True, slots=True)
+class CompositionRegistryEntry:
+    surface_pattern: str
+    composition_category: str
+    polarity: Polarity
+    provenance: str
+
+
+@dataclass(frozen=True, slots=True)
+class CompositionRegistry:
+    by_pattern: Mapping[str, CompositionRegistryEntry]
+    by_category: Mapping[str, tuple[CompositionRegistryEntry, ...]]
+    pack_manifest_sha256: str
+    source_pack_id: str
+
+    def is_empty(self) -> bool:
+        return not self.by_pattern
+
+    def __hash__(self) -> int:
+        return hash((self.pack_manifest_sha256, self.source_pack_id))
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, CompositionRegistry):
+            return NotImplemented
+        return (
+            dict(self.by_pattern) == dict(other.by_pattern)
+            and self.pack_manifest_sha256 == other.pack_manifest_sha256
+            and self.source_pack_id == other.source_pack_id
+        )
+
+
+_CACHE: dict[tuple[str, int, str], CompositionRegistry] = {}
+
+_DEFAULT_PACK_RELPATH = Path("language_packs") / "data" / "en_core_math_v1"
+
+_VALID_POLARITIES: frozenset[str] = frozenset({"affirms", "falsifies"})
+
+
+def _repo_root() -> Path:
+    here = Path(__file__).resolve()
+    candidate = here
+    for _ in range(10):
+        candidate = candidate.parent
+        if (candidate / "pyproject.toml").exists() or (candidate / "setup.cfg").exists():
+            return candidate
+    return here.parent.parent.parent
+
+
+def _sha256_bytes(data: bytes) -> str:
+    return hashlib.sha256(data).hexdigest()
+
+
+def _empty_registry(pack_id: str, manifest_sha256: str) -> CompositionRegistry:
+    return CompositionRegistry(
+        by_pattern=types.MappingProxyType({}),
+        by_category=types.MappingProxyType({}),
+        pack_manifest_sha256=manifest_sha256,
+        source_pack_id=pack_id,
+    )
+
+
+def load_composition_registry(pack_path: Path | None = None) -> CompositionRegistry:
+    """Load and cache the math pack's composition registry.
+
+    When ``{pack}/compositions.jsonl`` is absent or empty, returns an
+    empty registry (no-op semantics).
+
+    When the manifest declares ``composition_checksum`` it MUST match
+    the on-disk compiled bytes; mismatch raises
+    :class:`CompositionRegistryLoadError`.
+
+    Any entry whose ``composition_category`` is outside
+    :data:`SAFE_COMPOSITION_CATEGORIES` raises
+    :class:`WrongCompositionCategory` (defense in depth).
+
+    Any entry whose ``polarity`` is not in
+    ``{"affirms", "falsifies"}`` raises
+    :class:`CompositionRegistryLoadError`.
+
+    Caches per (resolved_path, mtime_ns, sha256).
+    """
+    resolved = (
+        (pack_path if isinstance(pack_path, Path) else Path(pack_path)).resolve()
+        if pack_path is not None
+        else (_repo_root() / _DEFAULT_PACK_RELPATH).resolve()
+    )
+
+    manifest_path = resolved / "manifest.json"
+    compiled_path = resolved / "compositions.jsonl"
+    if not manifest_path.exists():
+        raise CompositionRegistryLoadError(f"Pack manifest missing: {manifest_path}")
+    manifest = json.loads(manifest_path.read_text(encoding="utf-8"))
+    pack_id: str = manifest.get("pack_id", resolved.name)
+    declared_sha256 = manifest.get("composition_checksum")
+
+    if not compiled_path.exists():
+        if declared_sha256:
+            raise CompositionRegistryLoadError(
+                f"Manifest declares composition_checksum={declared_sha256!r} but "
+                f"compositions.jsonl is missing at {compiled_path}"
+            )
+        return _empty_registry(pack_id, manifest.get("checksum", ""))
+
+    compiled_bytes = compiled_path.read_bytes()
+    actual_sha256 = _sha256_bytes(compiled_bytes)
+    mtime_ns = os.stat(compiled_path).st_mtime_ns
+    cache_key = (str(resolved), mtime_ns, actual_sha256)
+
+    cached = _CACHE.get(cache_key)
+    if cached is not None:
+        return cached
+
+    if declared_sha256 and declared_sha256 != actual_sha256:
+        raise CompositionRegistryLoadError(
+            f"Composition checksum mismatch for {resolved!r}: "
+            f"declared={declared_sha256!r}, actual={actual_sha256!r}"
+        )
+
+    entries: list[CompositionRegistryEntry] = []
+    if compiled_bytes:
+        for line in compiled_bytes.decode("utf-8").splitlines():
+            line = line.strip()
+            if not line:
+                continue
+            rec = json.loads(line)
+
+            category = rec.get("composition_category")
+            if category not in SAFE_COMPOSITION_CATEGORIES:
+                raise WrongCompositionCategory(
+                    f"Composition entry has category {category!r} outside "
+                    f"SAFE_COMPOSITION_CATEGORIES="
+                    f"{sorted(SAFE_COMPOSITION_CATEGORIES)!r}; "
+                    "load-time allowlist enforced per ADR-0169 defense in depth"
+                )
+
+            polarity = rec.get("polarity")
+            if polarity not in _VALID_POLARITIES:
+                raise CompositionRegistryLoadError(
+                    f"Composition entry has invalid polarity {polarity!r}; "
+                    f"must be one of {sorted(_VALID_POLARITIES)!r}"
+                )
+
+            entries.append(
+                CompositionRegistryEntry(
+                    surface_pattern=str(rec["surface_pattern"]),
+                    composition_category=str(category),
+                    polarity=polarity,
+                    provenance=str(rec.get("provenance", "")),
+                )
+            )
+
+    by_pattern_mut: dict[str, CompositionRegistryEntry] = {}
+    by_cat_mut: dict[str, list[CompositionRegistryEntry]] = {}
+    for entry in entries:
+        # Pattern identity is the case-sensitive surface pattern — these
+        # are structural shape strings, not natural-language surfaces.
+        key = entry.surface_pattern
+        existing = by_pattern_mut.get(key)
+        if existing is not None and (
+            existing.composition_category != entry.composition_category
+            or existing.polarity != entry.polarity
+        ):
+            raise CompositionRegistryLoadError(
+                f"Composition pattern {key!r} carries conflicting entries: "
+                f"({existing.composition_category!r}, {existing.polarity!r}) vs "
+                f"({entry.composition_category!r}, {entry.polarity!r})"
+            )
+        by_pattern_mut[key] = entry
+        by_cat_mut.setdefault(entry.composition_category, []).append(entry)
+
+    by_category_frozen: dict[str, tuple[CompositionRegistryEntry, ...]] = {
+        cat: tuple(sorted(lst, key=lambda e: e.surface_pattern))
+        for cat, lst in by_cat_mut.items()
+    }
+
+    registry = CompositionRegistry(
+        by_pattern=types.MappingProxyType(by_pattern_mut),
+        by_category=types.MappingProxyType(by_category_frozen),
+        pack_manifest_sha256=actual_sha256,
+        source_pack_id=pack_id,
+    )
+    _CACHE[cache_key] = registry
+    return registry
+
+
+def lookup(
+    registry: CompositionRegistry, surface_pattern: str
+) -> CompositionRegistryEntry | None:
+    """Exact-match lookup by surface pattern (case-sensitive, structural)."""
+    return registry.by_pattern.get(surface_pattern)
+
+
+def is_affirmed(registry: CompositionRegistry, surface_pattern: str) -> bool:
+    """Return True only when an entry exists AND its polarity is ``affirms``.
+
+    Convenience for consumer code: a falsifying entry returns False (the
+    consumer must suppress injection that would have fired anyway).
+    Absence also returns False (no opinion).
+    """
+    entry = registry.by_pattern.get(surface_pattern)
+    return entry is not None and entry.polarity == "affirms"
+
+
+def is_falsified(registry: CompositionRegistry, surface_pattern: str) -> bool:
+    """Return True only when an entry exists AND its polarity is ``falsifies``."""
+    entry = registry.by_pattern.get(surface_pattern)
+    return entry is not None and entry.polarity == "falsifies"
+
+
+def clear_cache() -> None:
+    """Test hook — drop the per-process cache."""
+    _CACHE.clear()
+
+
+__all__ = [
+    "CompositionRegistry",
+    "CompositionRegistryEntry",
+    "CompositionRegistryLoadError",
+    "WrongCompositionCategory",
+    "Polarity",
+    "load_composition_registry",
+    "lookup",
+    "is_affirmed",
+    "is_falsified",
+    "clear_cache",
+]
diff --git a/generate/comprehension/frame_registry.py b/generate/comprehension/frame_registry.py
new file mode 100644
index 00000000..b87c78da
--- /dev/null
+++ b/generate/comprehension/frame_registry.py
@@ -0,0 +1,225 @@
+"""CW-1 — runtime frame registry loader.
+
+Reads ``{pack}/frames.jsonl`` (compiled by :mod:`language_packs.compile_frames`)
+and exposes a frozen lookup surface for the comprehension reader's
+frame-opener decision path.
+
+Mirrors :mod:`generate.comprehension.lexicon` structurally:
+
+- per-process cache keyed on ``(resolved_path, mtime_ns, sha256)``
+- manifest checksum verification when the manifest declares
+  ``frame_checksum``; backward-compatible when the field is absent
+- empty / missing compiled artifact yields an empty registry rather
+  than raising — preserves the no-op invariant when ``frames/`` carries
+  zero reviewed entries
+
+Trust boundary: read-only over the reviewed math pack; no engine_state
+writes, no corpus mutation, no fallback to unsigned paths.
+"""
+
+from __future__ import annotations
+
+import hashlib
+import json
+import os
+import types
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Literal, Mapping
+
+
+class FrameRegistryLoadError(ValueError):
+    """Raised on any load-time failure (checksum mismatch, malformed entry)."""
+
+
+Polarity = Literal["affirms", "falsifies"]
+
+
+@dataclass(frozen=True, slots=True)
+class FrameRegistryEntry:
+    surface_form: str
+    frame_category: str
+    polarity: Polarity
+    provenance: str
+
+
+@dataclass(frozen=True, slots=True)
+class FrameRegistry:
+    by_surface: Mapping[str, FrameRegistryEntry]
+    by_category: Mapping[str, tuple[FrameRegistryEntry, ...]]
+    pack_manifest_sha256: str
+    source_pack_id: str
+
+    def is_empty(self) -> bool:
+        return not self.by_surface
+
+    def __hash__(self) -> int:
+        return hash((self.pack_manifest_sha256, self.source_pack_id))
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, FrameRegistry):
+            return NotImplemented
+        return (
+            dict(self.by_surface) == dict(other.by_surface)
+            and self.pack_manifest_sha256 == other.pack_manifest_sha256
+            and self.source_pack_id == other.source_pack_id
+        )
+
+
+_CACHE: dict[tuple[str, int, str], FrameRegistry] = {}
+
+_DEFAULT_PACK_RELPATH = Path("language_packs") / "data" / "en_core_math_v1"
+
+_VALID_POLARITIES: frozenset[str] = frozenset({"affirms", "falsifies"})
+
+
+def _repo_root() -> Path:
+    here = Path(__file__).resolve()
+    candidate = here
+    for _ in range(10):
+        candidate = candidate.parent
+        if (candidate / "pyproject.toml").exists() or (candidate / "setup.cfg").exists():
+            return candidate
+    return here.parent.parent.parent
+
+
+def _sha256_bytes(data: bytes) -> str:
+    return hashlib.sha256(data).hexdigest()
+
+
+def _empty_registry(pack_id: str, manifest_sha256: str) -> FrameRegistry:
+    return FrameRegistry(
+        by_surface=types.MappingProxyType({}),
+        by_category=types.MappingProxyType({}),
+        pack_manifest_sha256=manifest_sha256,
+        source_pack_id=pack_id,
+    )
+
+
+def load_frame_registry(pack_path: Path | None = None) -> FrameRegistry:
+    """Load and cache the math pack's frame registry.
+
+    When ``{pack}/frames.jsonl`` is absent or empty, returns an empty
+    registry (no-op semantics). When the manifest declares a
+    ``frame_checksum`` it MUST match the on-disk compiled bytes; a
+    mismatch raises :class:`FrameRegistryLoadError`.
+
+    Caches per (resolved_path, mtime_ns, sha256) — invalidated on any
+    byte-level edit to the compiled artifact.
+    """
+    resolved = (
+        (pack_path if isinstance(pack_path, Path) else Path(pack_path)).resolve()
+        if pack_path is not None
+        else (_repo_root() / _DEFAULT_PACK_RELPATH).resolve()
+    )
+
+    manifest_path = resolved / "manifest.json"
+    compiled_path = resolved / "frames.jsonl"
+    if not manifest_path.exists():
+        raise FrameRegistryLoadError(f"Pack manifest missing: {manifest_path}")
+    manifest = json.loads(manifest_path.read_text(encoding="utf-8"))
+    pack_id: str = manifest.get("pack_id", resolved.name)
+    declared_sha256 = manifest.get("frame_checksum")
+
+    if not compiled_path.exists():
+        # Backward-compat: no compiled frames + no declared checksum is a
+        # legitimate empty registry. A declared checksum with no compiled
+        # file is a discipline violation.
+        if declared_sha256:
+            raise FrameRegistryLoadError(
+                f"Manifest declares frame_checksum={declared_sha256!r} but "
+                f"frames.jsonl is missing at {compiled_path}"
+            )
+        return _empty_registry(pack_id, manifest.get("checksum", ""))
+
+    compiled_bytes = compiled_path.read_bytes()
+    actual_sha256 = _sha256_bytes(compiled_bytes)
+    mtime_ns = os.stat(compiled_path).st_mtime_ns
+    cache_key = (str(resolved), mtime_ns, actual_sha256)
+
+    cached = _CACHE.get(cache_key)
+    if cached is not None:
+        return cached
+
+    if declared_sha256 and declared_sha256 != actual_sha256:
+        raise FrameRegistryLoadError(
+            f"Frame checksum mismatch for {resolved!r}: "
+            f"declared={declared_sha256!r}, actual={actual_sha256!r}"
+        )
+
+    entries: list[FrameRegistryEntry] = []
+    if compiled_bytes:
+        for line in compiled_bytes.decode("utf-8").splitlines():
+            line = line.strip()
+            if not line:
+                continue
+            rec = json.loads(line)
+            polarity = rec.get("polarity")
+            if polarity not in _VALID_POLARITIES:
+                raise FrameRegistryLoadError(
+                    f"Frame entry has invalid polarity {polarity!r}; "
+                    f"must be one of {sorted(_VALID_POLARITIES)!r}"
+                )
+            entries.append(
+                FrameRegistryEntry(
+                    surface_form=str(rec["surface_form"]),
+                    frame_category=str(rec["frame_category"]),
+                    polarity=polarity,
+                    provenance=str(rec.get("provenance", "")),
+                )
+            )
+
+    by_surface_mut: dict[str, FrameRegistryEntry] = {}
+    by_cat_mut: dict[str, list[FrameRegistryEntry]] = {}
+    for entry in entries:
+        key = entry.surface_form.lower()
+        # Conflict policy: the FIRST entry per (surface, category, polarity)
+        # wins; later identical entries are deduped. Conflicting polarities
+        # for the same surface form raise — the operator must resolve.
+        existing = by_surface_mut.get(key)
+        if existing is not None and (
+            existing.frame_category != entry.frame_category
+            or existing.polarity != entry.polarity
+        ):
+            raise FrameRegistryLoadError(
+                f"Frame surface {key!r} carries conflicting entries: "
+                f"({existing.frame_category!r}, {existing.polarity!r}) vs "
+                f"({entry.frame_category!r}, {entry.polarity!r})"
+            )
+        by_surface_mut[key] = entry
+        by_cat_mut.setdefault(entry.frame_category, []).append(entry)
+
+    by_category_frozen: dict[str, tuple[FrameRegistryEntry, ...]] = {
+        cat: tuple(sorted(lst, key=lambda e: e.surface_form))
+        for cat, lst in by_cat_mut.items()
+    }
+
+    registry = FrameRegistry(
+        by_surface=types.MappingProxyType(by_surface_mut),
+        by_category=types.MappingProxyType(by_category_frozen),
+        pack_manifest_sha256=actual_sha256,
+        source_pack_id=pack_id,
+    )
+    _CACHE[cache_key] = registry
+    return registry
+
+
+def lookup(registry: FrameRegistry, surface: str) -> FrameRegistryEntry | None:
+    """Case-fold surface and return its entry, or None if unknown."""
+    return registry.by_surface.get(surface.lower())
+
+
+def clear_cache() -> None:
+    """Test hook — drop the per-process cache."""
+    _CACHE.clear()
+
+
+__all__ = [
+    "FrameRegistry",
+    "FrameRegistryEntry",
+    "FrameRegistryLoadError",
+    "Polarity",
+    "load_frame_registry",
+    "lookup",
+    "clear_cache",
+]
diff --git a/generate/recognizer_anchor_inject.py b/generate/recognizer_anchor_inject.py
index b9d8e937..0dc7bb48 100644
--- a/generate/recognizer_anchor_inject.py
+++ b/generate/recognizer_anchor_inject.py
@@ -82,11 +82,105 @@ def inject_from_match(
     so per-category injectors can emit operations as well as initials.
     The v1 ``discrete_count_statement`` injector continues to emit only
     ``CandidateInitial`` — the widening is type-level only in this PR.
+
+    CW-2 (ADR-0169 consumption) — when the per-category injector
+    returns empty AND the matcher published a ``composition_shape`` key
+    in ``parsed_anchors``, the composition registry is consulted: an
+    ``affirms`` entry under :data:`SAFE_COMPOSITION_CATEGORIES` admits
+    the composition; a ``falsifies`` entry continues to refuse;
+    absence continues to refuse. The composition path is read-only
+    over the reviewed math pack — it cannot weaken any existing
+    admission gate. See :mod:`generate.comprehension.composition_registry`.
     """
     injector = _INJECTORS.get(match.category)
-    if injector is None:
+    if injector is not None:
+        emitted = injector(match, sentence)
+        if emitted:
+            return emitted
+    return _consult_composition_registry(match, sentence)
+
+
+# ---------------------------------------------------------------------------
+# CW-2 — composition registry consultation (ADR-0169 consumption)
+# ---------------------------------------------------------------------------
+
+
+def _consult_composition_registry(
+    match: RecognizerMatch,
+    sentence: str,
+) -> tuple[InjectorEmission, ...]:
+    """Composition-registry consultation fallback for ``inject_from_match``.
+
+    Contract (the contract a matcher extension must honor to enable
+    composition admission via this path):
+
+    - ``match.parsed_anchors`` carries at least one anchor mapping with a
+      key ``"composition_shape"`` whose value is the surface pattern
+      string used by ratified composition registry entries (e.g.
+      ``"bound(count) × bound(unit_cost)"``).
+    - The same anchor carries a pre-composed payload the registry only
+      gates: either ``"composed_initial"`` (a fully-constructed
+      :class:`CandidateInitial`) or ``"composed_operation"`` (a
+      :class:`CandidateOperation`). This module does NOT perform
+      arithmetic — the matcher / matcher-extension owns the math; the
+      registry owns the admissibility decision.
+
+    Semantics:
+
+    - registry empty OR no entry for shape → return ``()`` (refusal-preferring)
+    - entry exists, polarity ``"affirms"`` → admit the pre-composed payload
+    - entry exists, polarity ``"falsifies"`` → return ``()`` (suppressed)
+
+    This is a registry-driven *gate*, not a registry-driven arithmetic
+    primitive. Per ADR-0169 §"Mutation boundary" the registry never
+    rewrites solver / arithmetic semantics; it ratifies whether a
+    given structural shape may admit.
+
+    No matcher currently publishes ``composition_shape`` — at land time
+    this path is dormant infrastructure. The case-0019 truth-test will
+    fire only after a matcher extension binds quantity-shape composition
+    anchors (out of scope for this PR; see follow-up brief).
+    """
+    if not match.parsed_anchors:
         return ()
-    return injector(match, sentence)
+
+    # Lazy import — composition_registry import chain pulls
+    # SAFE_COMPOSITION_CATEGORIES from teaching/, and the load path may
+    # not be needed on every recognizer call. Module-level loader cache
+    # keeps the repeat-call cost at one dict hit after the first load.
+    from generate.comprehension.composition_registry import (
+        is_affirmed,
+        is_falsified,
+        load_composition_registry,
+    )
+
+    registry = load_composition_registry()
+    if registry.is_empty():
+        return ()
+
+    out: list[InjectorEmission] = []
+    for anchor in match.parsed_anchors:
+        shape = anchor.get("composition_shape") if isinstance(anchor, Mapping) else None
+        if not isinstance(shape, str):
+            continue
+        if is_falsified(registry, shape):
+            # Falsifying entry — suppress any admission that would have
+            # fired from this anchor; refusal-preferring discipline.
+            return ()
+        if not is_affirmed(registry, shape):
+            continue
+        composed_initial = anchor.get("composed_initial")
+        composed_operation = anchor.get("composed_operation")
+        if isinstance(composed_initial, CandidateInitial):
+            out.append(composed_initial)
+        elif isinstance(composed_operation, CandidateOperation):
+            out.append(composed_operation)
+        else:
+            # The registry affirms the shape but no pre-composed payload
+            # is attached — under-admit. The matcher owns producing the
+            # payload; we never invent arithmetic here.
+            return ()
+    return tuple(out)
 
 
 # ---------------------------------------------------------------------------
diff --git a/language_packs/compile_compositions.py b/language_packs/compile_compositions.py
new file mode 100644
index 00000000..7f04f640
--- /dev/null
+++ b/language_packs/compile_compositions.py
@@ -0,0 +1,78 @@
+"""CW-2 — compile compositions/*.jsonl into a deterministic compositions.jsonl artifact.
+
+Mirrors :mod:`language_packs.compile_frames` for the composition surface.
+Reads per-category source files under ``{pack}/compositions/*.jsonl`` and
+writes ``{pack}/compositions.jsonl`` with entries sorted by
+``(composition_category, surface_pattern)``.
+
+Trust boundary: read-only over the reviewed pack. The compile step does
+**not** enforce the SAFE_COMPOSITION_CATEGORIES allowlist — that lives
+at write time (handler) and re-fires at load time (registry). Compile
+is byte-deterministic projection only.
+
+Empty source directory produces an empty (zero-byte) compiled artifact.
+"""
+
+from __future__ import annotations
+
+import hashlib
+import json
+from pathlib import Path
+from typing import Any
+
+
+def _canonical_entry(rec: dict[str, Any]) -> dict[str, Any]:
+    """Project an entry to its canonical-bytes shape.
+
+    Required keys: surface_pattern, composition_category, polarity,
+    provenance, evidence_hashes.
+    """
+    return {
+        "surface_pattern": str(rec["surface_pattern"]),
+        "composition_category": str(rec["composition_category"]),
+        "polarity": str(rec["polarity"]),
+        "provenance": str(rec.get("provenance", "")),
+        "evidence_hashes": [str(h) for h in rec.get("evidence_hashes", [])],
+    }
+
+
+def compile_compositions(pack_path: Path) -> tuple[bytes, str]:
+    """Compile ``{pack_path}/compositions/*.jsonl`` → bytes + sha256.
+
+    Writes ``{pack_path}/compositions.jsonl`` if the bytes differ.
+    Returns ``(compiled_bytes, sha256)`` so the caller may update the
+    pack manifest's ``composition_checksum``.
+    """
+    source_dir = pack_path / "compositions"
+    entries: list[dict[str, Any]] = []
+    if source_dir.is_dir():
+        for src in sorted(source_dir.glob("*.jsonl")):
+            for line in src.read_text(encoding="utf-8").splitlines():
+                line = line.strip()
+                if not line:
+                    continue
+                entries.append(_canonical_entry(json.loads(line)))
+
+    entries.sort(key=lambda e: (e["composition_category"], e["surface_pattern"]))
+
+    if not entries:
+        compiled_bytes = b""
+    else:
+        compiled_bytes = (
+            "\n".join(
+                json.dumps(e, ensure_ascii=False, sort_keys=True, separators=(",", ":"))
+                for e in entries
+            )
+            + "\n"
+        ).encode("utf-8")
+
+    out_path = pack_path / "compositions.jsonl"
+    existing = out_path.read_bytes() if out_path.exists() else None
+    if existing != compiled_bytes:
+        out_path.write_bytes(compiled_bytes)
+
+    sha256 = hashlib.sha256(compiled_bytes).hexdigest()
+    return compiled_bytes, sha256
+
+
+__all__ = ["compile_compositions"]
diff --git a/language_packs/compile_frames.py b/language_packs/compile_frames.py
new file mode 100644
index 00000000..906fc5fb
--- /dev/null
+++ b/language_packs/compile_frames.py
@@ -0,0 +1,86 @@
+"""CW-1 — compile frames/*.jsonl into a deterministic frames.jsonl artifact.
+
+Mirrors the lexicon compile pattern (see ``language_packs/compiler.py``).
+Reads per-category source files under ``{pack}/frames/*.jsonl``, normalizes
+ordering, and writes the compiled artifact ``{pack}/frames.jsonl`` with
+entries sorted by ``(frame_category, surface_form)``.
+
+Returns the sha256 of the compiled bytes so callers (typically the
+manifest writer) can pin ``frame_checksum`` per CLAUDE.md
+"Semantic Pack Discipline".
+
+Trust boundary: read-only over the reviewed pack; no engine_state writes,
+no corpus mutation. Empty source directory produces an empty (zero-byte)
+compiled artifact — the loader treats this as a no-op.
+"""
+
+from __future__ import annotations
+
+import hashlib
+import json
+from pathlib import Path
+from typing import Any
+
+
+def _canonical_entry(rec: dict[str, Any]) -> dict[str, Any]:
+    """Project the entry to its canonical-bytes shape.
+
+    Drops unknown keys to keep the compiled artifact byte-stable across
+    upstream schema additions. Required keys: surface_form, frame_category,
+    polarity, provenance, evidence_hashes.
+    """
+    return {
+        "surface_form": str(rec["surface_form"]),
+        "frame_category": str(rec["frame_category"]),
+        "polarity": str(rec["polarity"]),
+        "provenance": str(rec.get("provenance", "")),
+        "evidence_hashes": [str(h) for h in rec.get("evidence_hashes", [])],
+    }
+
+
+def compile_frames(pack_path: Path) -> tuple[bytes, str]:
+    """Compile ``{pack_path}/frames/*.jsonl`` → bytes + sha256.
+
+    The compiled bytes are written to ``{pack_path}/frames.jsonl`` if
+    they differ from the existing file (or it does not exist). The
+    sha256 is returned so the caller may update the pack manifest.
+
+    Deterministic ordering: source files iterated alphabetically; entries
+    within each file are re-sorted globally by
+    ``(frame_category, surface_form)`` before write.
+
+    Empty source directory (or missing) → zero-byte artifact.
+    """
+    source_dir = pack_path / "frames"
+    entries: list[dict[str, Any]] = []
+    if source_dir.is_dir():
+        for src in sorted(source_dir.glob("*.jsonl")):
+            for line in src.read_text(encoding="utf-8").splitlines():
+                line = line.strip()
+                if not line:
+                    continue
+                entries.append(_canonical_entry(json.loads(line)))
+
+    entries.sort(key=lambda e: (e["frame_category"], e["surface_form"]))
+
+    if not entries:
+        compiled_bytes = b""
+    else:
+        compiled_bytes = (
+            "\n".join(
+                json.dumps(e, ensure_ascii=False, sort_keys=True, separators=(",", ":"))
+                for e in entries
+            )
+            + "\n"
+        ).encode("utf-8")
+
+    out_path = pack_path / "frames.jsonl"
+    existing = out_path.read_bytes() if out_path.exists() else None
+    if existing != compiled_bytes:
+        out_path.write_bytes(compiled_bytes)
+
+    sha256 = hashlib.sha256(compiled_bytes).hexdigest()
+    return compiled_bytes, sha256
+
+
+__all__ = ["compile_frames"]
diff --git a/language_packs/compiler.py b/language_packs/compiler.py
index ea1dd237..2e3a3278 100644
--- a/language_packs/compiler.py
+++ b/language_packs/compiler.py
@@ -462,6 +462,29 @@ def _load_pack_cached(pack_id: str) -> tuple[LanguagePackManifest, VocabManifold
                 f"{actual} != {expected_glosses_checksum}"
             )
 
+    # ADR-0168 + ADR-0169 consumption — frame_checksum / composition_checksum.
+    # Same backward-compatible pattern as glosses_checksum: missing field +
+    # missing compiled file is the empty-registry no-op path. Declared
+    # checksum with no compiled file is a discipline violation.
+    for kind, manifest_key in (
+        ("frames", "frame_checksum"),
+        ("compositions", "composition_checksum"),
+    ):
+        expected = manifest_payload.get(manifest_key)
+        compiled_path = pack_dir / f"{kind}.jsonl"
+        if expected is not None:
+            if not compiled_path.exists():
+                raise ValueError(
+                    f"Manifest for {pack_id} declares {manifest_key} but "
+                    f"{kind}.jsonl is missing at {compiled_path}"
+                )
+            actual = hashlib.sha256(compiled_path.read_bytes()).hexdigest()
+            if actual != expected:
+                raise ValueError(
+                    f"{kind.capitalize()} checksum mismatch for {pack_id}: "
+                    f"{actual} != {expected}"
+                )
+
     entries = load_pack_entries(pack_id)
     morphology_registry = None
     if any(entry.morphology_id for entry in entries):
diff --git a/tests/test_composition_consult_in_injector.py b/tests/test_composition_consult_in_injector.py
new file mode 100644
index 00000000..fe61846e
--- /dev/null
+++ b/tests/test_composition_consult_in_injector.py
@@ -0,0 +1,195 @@
+"""CW-2 — inject_from_match composition-registry consultation tests.
+
+Verifies the contract of ``_consult_composition_registry``:
+
+- empty registry → fallback is a no-op (no admission)
+- matcher publishes ``composition_shape`` + ``composed_initial``,
+  registry affirms → inject_from_match emits the composed payload
+- matcher publishes the shape, registry falsifies → suppressed
+- matcher publishes the shape, registry absent → refusal-preferring
+- matcher publishes the shape AND registry affirms BUT no
+  ``composed_initial`` payload → under-admit (registry never invents
+  arithmetic; ADR-0169 §"Mutation boundary")
+
+These tests are wiring-level — they verify the consumer is reachable
+from the production code path. They do not exercise the full
+candidate-graph pipeline (covered by the eval-delta truth test once a
+matcher extension publishes ``composition_shape``).
+"""
+
+from __future__ import annotations
+
+import json
+from pathlib import Path
+from typing import Any
+
+import pytest
+
+from evals.refusal_taxonomy.shape_categories import ShapeCategory
+from generate.comprehension.composition_registry import (
+    clear_cache as clear_composition_cache,
+)
+from generate.math_candidate_parser import CandidateInitial
+from generate.math_problem_graph import InitialPossession, Quantity
+from generate.recognizer_anchor_inject import inject_from_match
+from generate.recognizer_match import RecognizerMatch
+from language_packs.compile_compositions import compile_compositions
+
+
+_SHAPE = "bound(count) × bound(unit_cost)"
+
+
+def _build_candidate_initial() -> CandidateInitial:
+    return CandidateInitial(
+        initial=InitialPossession(
+            entity="John",
+            quantity=Quantity(value=1200, unit="dollars"),
+        ),
+        source_span="3 vet appointments cost $400 each",
+        matched_anchor="has",
+        matched_value_token="1200",
+        matched_unit_token="dollars",
+        matched_entity_token="John",
+    )
+
+
+class _FakeRecognizer:
+    """Test double — RecognizerMatch only stores the recognizer reference."""
+
+    spec_id = "test_spec"
+
+
+def _build_match(anchor: dict[str, Any]) -> RecognizerMatch:
+    return RecognizerMatch(
+        recognizer=_FakeRecognizer(),  # type: ignore[arg-type]
+        category=ShapeCategory.CURRENCY_AMOUNT,
+        outcome="admissible",
+        graph_intent="amount",
+        parsed_anchors=(anchor,),
+    )
+
+
+def _write_registry(
+    pack_path: Path,
+    surface_pattern: str,
+    polarity: str,
+    category: str = "multiplicative_composition",
+) -> None:
+    comp_dir = pack_path / "compositions"
+    comp_dir.mkdir(parents=True, exist_ok=True)
+    (comp_dir / f"{category}.jsonl").write_text(
+        json.dumps(
+            {
+                "surface_pattern": surface_pattern,
+                "composition_category": category,
+                "polarity": polarity,
+                "provenance": "test_provenance",
+                "evidence_hashes": [],
+            }
+        )
+        + "\n",
+        encoding="utf-8",
+    )
+    _, sha = compile_compositions(pack_path)
+    (pack_path / "manifest.json").write_text(
+        json.dumps(
+            {
+                "pack_id": "en_core_math_v1",  # use canonical pack id
+                "checksum": "deadbeef",
+                "composition_checksum": sha,
+            }
+        ),
+        encoding="utf-8",
+    )
+
+
+def setup_function(_):
+    clear_composition_cache()
+
+
+def _patch_pack_root(monkeypatch: pytest.MonkeyPatch, pack_path: Path) -> None:
+    """Redirect the composition registry's default pack-root to our fixture."""
+    from generate.comprehension import composition_registry as cr
+
+    monkeypatch.setattr(cr, "_DEFAULT_PACK_RELPATH", pack_path)
+    monkeypatch.setattr(cr, "_repo_root", lambda: Path("/"))
+
+
+def test_no_composition_shape_returns_empty(monkeypatch, tmp_path):
+    _patch_pack_root(monkeypatch, tmp_path)
+    (tmp_path / "manifest.json").write_text(
+        json.dumps({"pack_id": "en_core_math_v1", "checksum": "x"}),
+        encoding="utf-8",
+    )
+    match = _build_match({"kind": "currency_amount"})  # no composition_shape
+    result = inject_from_match(match, "sentence")
+    assert result == ()
+
+
+def test_affirms_admits_pre_composed_initial(monkeypatch, tmp_path):
+    _write_registry(tmp_path, _SHAPE, "affirms")
+    _patch_pack_root(monkeypatch, tmp_path)
+    composed = _build_candidate_initial()
+    match = _build_match(
+        {
+            "composition_shape": _SHAPE,
+            "composed_initial": composed,
+        }
+    )
+    result = inject_from_match(match, "sentence")
+    assert result == (composed,)
+
+
+def test_falsifies_suppresses(monkeypatch, tmp_path):
+    _write_registry(tmp_path, _SHAPE, "falsifies")
+    _patch_pack_root(monkeypatch, tmp_path)
+    composed = _build_candidate_initial()
+    match = _build_match(
+        {
+            "composition_shape": _SHAPE,
+            "composed_initial": composed,
+        }
+    )
+    result = inject_from_match(match, "sentence")
+    assert result == ()
+
+
+def test_absent_in_registry_refuses(monkeypatch, tmp_path):
+    _write_registry(tmp_path, "different_shape", "affirms")
+    _patch_pack_root(monkeypatch, tmp_path)
+    composed = _build_candidate_initial()
+    match = _build_match(
+        {
+            "composition_shape": _SHAPE,  # not in registry
+            "composed_initial": composed,
+        }
+    )
+    result = inject_from_match(match, "sentence")
+    assert result == ()
+
+
+def test_affirms_without_composed_payload_under_admits(monkeypatch, tmp_path):
+    """Registry never invents arithmetic — affirms + no payload = ()."""
+    _write_registry(tmp_path, _SHAPE, "affirms")
+    _patch_pack_root(monkeypatch, tmp_path)
+    match = _build_match({"composition_shape": _SHAPE})  # no composed_initial
+    result = inject_from_match(match, "sentence")
+    assert result == ()
+
+
+def test_empty_registry_is_noop(monkeypatch, tmp_path):
+    (tmp_path / "manifest.json").write_text(
+        json.dumps({"pack_id": "en_core_math_v1", "checksum": "x"}),
+        encoding="utf-8",
+    )
+    _patch_pack_root(monkeypatch, tmp_path)
+    composed = _build_candidate_initial()
+    match = _build_match(
+        {
+            "composition_shape": _SHAPE,
+            "composed_initial": composed,
+        }
+    )
+    # Empty registry — even with a fully-populated anchor, no admission.
+    result = inject_from_match(match, "sentence")
+    assert result == ()
diff --git a/tests/test_composition_registry_load.py b/tests/test_composition_registry_load.py
new file mode 100644
index 00000000..5a178dc2
--- /dev/null
+++ b/tests/test_composition_registry_load.py
@@ -0,0 +1,266 @@
+"""CW-2 — composition_registry loader tests.
+
+Covers: empty no-op, round-trip, deterministic order, manifest mismatch,
+declared-without-file, cache, byte-stability, allowlist enforcement
+(defense-in-depth), polarity validation, conflict detection,
+``is_affirmed`` / ``is_falsified`` semantics.
+"""
+
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+import pytest
+
+from generate.comprehension.composition_registry import (
+    CompositionRegistry,
+    CompositionRegistryLoadError,
+    WrongCompositionCategory,
+    clear_cache,
+    is_affirmed,
+    is_falsified,
+    load_composition_registry,
+    lookup,
+)
+from language_packs.compile_compositions import compile_compositions
+from teaching.math_composition_ratification import SAFE_COMPOSITION_CATEGORIES
+
+
+def _write_entry(
+    path: Path,
+    surface_pattern: str,
+    composition_category: str,
+    polarity: str = "affirms",
+    provenance: str = "test_provenance",
+) -> None:
+    with path.open("a", encoding="utf-8") as f:
+        f.write(
+            json.dumps(
+                {
+                    "surface_pattern": surface_pattern,
+                    "composition_category": composition_category,
+                    "polarity": polarity,
+                    "provenance": provenance,
+                    "evidence_hashes": [],
+                }
+            )
+            + "\n"
+        )
+
+
+@pytest.fixture
+def empty_pack(tmp_path: Path) -> Path:
+    (tmp_path / "manifest.json").write_text(
+        json.dumps({"pack_id": "test_empty", "checksum": "deadbeef"}),
+        encoding="utf-8",
+    )
+    return tmp_path
+
+
+@pytest.fixture
+def populated_pack(tmp_path: Path) -> Path:
+    comp_dir = tmp_path / "compositions"
+    comp_dir.mkdir()
+    _write_entry(
+        comp_dir / "multiplicative.jsonl",
+        "bound(count) × bound(unit_cost)",
+        "multiplicative_composition",
+        polarity="affirms",
+    )
+    _write_entry(
+        comp_dir / "additive.jsonl",
+        "bound(qty_a) + bound(qty_b)",
+        "additive_composition",
+        polarity="affirms",
+    )
+    _, sha = compile_compositions(tmp_path)
+    (tmp_path / "manifest.json").write_text(
+        json.dumps(
+            {
+                "pack_id": "test_populated",
+                "checksum": "deadbeef",
+                "composition_checksum": sha,
+            }
+        ),
+        encoding="utf-8",
+    )
+    return tmp_path
+
+
+def setup_function(_):
+    clear_cache()
+
+
+def test_empty_pack_returns_empty_registry(empty_pack: Path):
+    reg = load_composition_registry(empty_pack)
+    assert isinstance(reg, CompositionRegistry)
+    assert reg.is_empty()
+
+
+def test_populated_round_trip(populated_pack: Path):
+    reg = load_composition_registry(populated_pack)
+    assert not reg.is_empty()
+    entry = lookup(reg, "bound(count) × bound(unit_cost)")
+    assert entry is not None
+    assert entry.composition_category == "multiplicative_composition"
+    assert entry.polarity == "affirms"
+
+
+def test_safe_categories_pinned():
+    # Defense-in-depth: the load-time allowlist matches what the handler
+    # enforces at write time. If the handler's set ever drifts, this
+    # test fails — operator must update both surfaces consciously.
+    assert SAFE_COMPOSITION_CATEGORIES == frozenset(
+        {
+            "multiplicative_composition",
+            "additive_composition",
+            "subtractive_composition",
+        }
+    )
+
+
+def test_unsafe_category_at_load_raises(tmp_path: Path):
+    comp_dir = tmp_path / "compositions"
+    comp_dir.mkdir()
+    _write_entry(
+        comp_dir / "bad.jsonl",
+        "bound(a) ratio bound(b)",
+        "ratio_composition",  # explicitly deferred per ADR-0169
+    )
+    _, sha = compile_compositions(tmp_path)
+    (tmp_path / "manifest.json").write_text(
+        json.dumps(
+            {
+                "pack_id": "test",
+                "checksum": "x",
+                "composition_checksum": sha,
+            }
+        ),
+        encoding="utf-8",
+    )
+    with pytest.raises(WrongCompositionCategory, match="ratio_composition"):
+        load_composition_registry(tmp_path)
+
+
+def test_invalid_polarity_raises(tmp_path: Path):
+    comp_dir = tmp_path / "compositions"
+    comp_dir.mkdir()
+    _write_entry(
+        comp_dir / "bad.jsonl",
+        "x",
+        "multiplicative_composition",
+        polarity="maybe",
+    )
+    _, sha = compile_compositions(tmp_path)
+    (tmp_path / "manifest.json").write_text(
+        json.dumps(
+            {
+                "pack_id": "test",
+                "checksum": "x",
+                "composition_checksum": sha,
+            }
+        ),
+        encoding="utf-8",
+    )
+    with pytest.raises(CompositionRegistryLoadError, match="invalid polarity"):
+        load_composition_registry(tmp_path)
+
+
+def test_is_affirmed_and_is_falsified(tmp_path: Path):
+    comp_dir = tmp_path / "compositions"
+    comp_dir.mkdir()
+    _write_entry(
+        comp_dir / "ok.jsonl",
+        "shape_a",
+        "multiplicative_composition",
+        polarity="affirms",
+    )
+    _write_entry(
+        comp_dir / "ok.jsonl",
+        "shape_b",
+        "multiplicative_composition",
+        polarity="falsifies",
+    )
+    _, sha = compile_compositions(tmp_path)
+    (tmp_path / "manifest.json").write_text(
+        json.dumps({"pack_id": "t", "checksum": "x", "composition_checksum": sha}),
+        encoding="utf-8",
+    )
+    reg = load_composition_registry(tmp_path)
+    assert is_affirmed(reg, "shape_a") is True
+    assert is_falsified(reg, "shape_a") is False
+    assert is_affirmed(reg, "shape_b") is False
+    assert is_falsified(reg, "shape_b") is True
+    # Absence
+    assert is_affirmed(reg, "shape_unknown") is False
+    assert is_falsified(reg, "shape_unknown") is False
+
+
+def test_manifest_mismatch_raises(populated_pack: Path):
+    manifest_path = populated_pack / "manifest.json"
+    payload = json.loads(manifest_path.read_text())
+    payload["composition_checksum"] = "f" * 64
+    manifest_path.write_text(json.dumps(payload), encoding="utf-8")
+    clear_cache()
+    with pytest.raises(CompositionRegistryLoadError, match="checksum mismatch"):
+        load_composition_registry(populated_pack)
+
+
+def test_declared_without_file_raises(tmp_path: Path):
+    (tmp_path / "manifest.json").write_text(
+        json.dumps(
+            {
+                "pack_id": "test",
+                "checksum": "x",
+                "composition_checksum": "f" * 64,
+            }
+        ),
+        encoding="utf-8",
+    )
+    with pytest.raises(CompositionRegistryLoadError, match="missing"):
+        load_composition_registry(tmp_path)
+
+
+def test_compile_byte_stable(tmp_path: Path):
+    comp_dir = tmp_path / "compositions"
+    comp_dir.mkdir()
+    _write_entry(
+        comp_dir / "a.jsonl",
+        "bound(count) × bound(unit_cost)",
+        "multiplicative_composition",
+    )
+    b1, s1 = compile_compositions(tmp_path)
+    b2, s2 = compile_compositions(tmp_path)
+    assert b1 == b2
+    assert s1 == s2
+
+
+def test_cache_returns_same_instance(populated_pack: Path):
+    reg1 = load_composition_registry(populated_pack)
+    reg2 = load_composition_registry(populated_pack)
+    assert reg1 is reg2
+
+
+def test_conflicting_pattern_polarities_raise(tmp_path: Path):
+    comp_dir = tmp_path / "compositions"
+    comp_dir.mkdir()
+    _write_entry(
+        comp_dir / "a.jsonl",
+        "same_pattern",
+        "multiplicative_composition",
+        polarity="affirms",
+    )
+    _write_entry(
+        comp_dir / "b.jsonl",
+        "same_pattern",
+        "multiplicative_composition",
+        polarity="falsifies",
+    )
+    _, sha = compile_compositions(tmp_path)
+    (tmp_path / "manifest.json").write_text(
+        json.dumps({"pack_id": "t", "checksum": "x", "composition_checksum": sha}),
+        encoding="utf-8",
+    )
+    with pytest.raises(CompositionRegistryLoadError, match="conflicting entries"):
+        load_composition_registry(tmp_path)
diff --git a/tests/test_consumption_case_0050_hazard_pin.py b/tests/test_consumption_case_0050_hazard_pin.py
new file mode 100644
index 00000000..4899c0ec
--- /dev/null
+++ b/tests/test_consumption_case_0050_hazard_pin.py
@@ -0,0 +1,123 @@
+"""Mandatory case 0050 hazard pin for the consumption wiring.
+
+ADR-0169 §"Acceptance gates": ratifying any synthetic CompositionClaim
+under the SAFE allowlist must NOT cause case 0050 to admit.
+
+This test ratifies a synthetic CompositionClaim under each of the three
+allowlist categories, in turn, and confirms that case 0050 (the canary
+preventing pre_frame_filler "fixes" from drifting into wrong>0) remains
+refused under each.
+
+Because the composition wiring goes through ``inject_from_match`` and
+case 0050's refusal happens upstream (the regex parser already declines
+to admit), this is a structural hazard pin: ratifying compositions
+through the registry can never *enable* case 0050 because the
+recognizer doesn't bind ``composition_shape`` for that sentence shape.
+The pin verifies that invariant holds after this PR — i.e. the wiring
+is dormant for case 0050 specifically.
+
+See [[feedback-wrong-zero-hazard-case-0050]].
+"""
+
+from __future__ import annotations
+
+import json
+import shutil
+from pathlib import Path
+
+import pytest
+
+from generate.comprehension.composition_registry import (
+    clear_cache as clear_composition_cache,
+)
+from language_packs.compile_compositions import compile_compositions
+from teaching.math_composition_ratification import SAFE_COMPOSITION_CATEGORIES
+
+
+def setup_function(_):
+    clear_composition_cache()
+
+
+def _stage_pack(tmp_path: Path) -> Path:
+    """Materialize a clean copy of the en_core_math_v1 pack into tmp_path."""
+    here = Path(__file__).resolve()
+    repo = here
+    while repo.parent != repo and not (repo / "pyproject.toml").exists():
+        repo = repo.parent
+    src = repo / "language_packs" / "data" / "en_core_math_v1"
+    dst = tmp_path / "en_core_math_v1"
+    shutil.copytree(src, dst)
+    # Strip any pre-existing composition entries — start clean.
+    comp_dir = dst / "compositions"
+    if comp_dir.exists():
+        for f in comp_dir.glob("*.jsonl"):
+            f.unlink()
+    if (dst / "compositions.jsonl").exists():
+        (dst / "compositions.jsonl").unlink()
+    return dst
+
+
+@pytest.mark.parametrize("category", sorted(SAFE_COMPOSITION_CATEGORIES))
+def test_case_0050_stays_refused_under_each_allowlist_category(
+    monkeypatch, tmp_path: Path, category: str
+):
+    """Ratifying any allowlisted CompositionClaim must not enable case 0050."""
+    pack = _stage_pack(tmp_path)
+    comp_dir = pack / "compositions"
+    comp_dir.mkdir(exist_ok=True)
+    (comp_dir / f"{category}.jsonl").write_text(
+        json.dumps(
+            {
+                "surface_pattern": "bound(x) op bound(y)",
+                "composition_category": category,
+                "polarity": "affirms",
+                "provenance": f"test_case_0050_hazard_{category}",
+                "evidence_hashes": [],
+            }
+        )
+        + "\n",
+        encoding="utf-8",
+    )
+    _, sha = compile_compositions(pack)
+    manifest_path = pack / "manifest.json"
+    payload = json.loads(manifest_path.read_text(encoding="utf-8"))
+    payload["composition_checksum"] = sha
+    manifest_path.write_text(json.dumps(payload), encoding="utf-8")
+
+    # Redirect composition registry default to our staged pack.
+    from generate.comprehension import composition_registry as cr
+
+    monkeypatch.setattr(cr, "_DEFAULT_PACK_RELPATH", pack)
+    monkeypatch.setattr(cr, "_repo_root", lambda: Path("/"))
+
+    # Load the registry — confirms the ratified entry is admitted at load
+    # under the allowlist defense in depth.
+    reg = cr.load_composition_registry()
+    assert not reg.is_empty()
+
+    # The hazard pin: case 0050's refusal lives in math_candidate_graph
+    # upstream of inject_from_match. The recognizer for case 0050's
+    # sentences does not publish ``composition_shape`` in parsed_anchors,
+    # so the composition consult cannot fire. Verify the contract:
+    # without ``composition_shape``, the registry consult is a no-op.
+    from evals.refusal_taxonomy.shape_categories import ShapeCategory
+    from generate.recognizer_anchor_inject import inject_from_match
+    from generate.recognizer_match import RecognizerMatch
+
+    class _FakeRec:
+        spec_id = "test"
+
+    # Simulate the recognizer matching case 0050's sentence shape: an
+    # anchor with NO composition_shape (the matcher hasn't been extended).
+    match = RecognizerMatch(
+        recognizer=_FakeRec(),  # type: ignore[arg-type]
+        category=ShapeCategory.CURRENCY_AMOUNT,
+        outcome="admissible",
+        graph_intent="amount",
+        parsed_anchors=({"kind": "currency_amount"},),
+    )
+    result = inject_from_match(match, "case 0050 sentence")
+    # The hazard pin: registry is non-empty + affirms exists, but without
+    # a matcher-published composition_shape the consult cannot fire.
+    # Refusal-preserving by construction.
+    assert result == ()
diff --git a/tests/test_consumption_empty_registry_no_op.py b/tests/test_consumption_empty_registry_no_op.py
new file mode 100644
index 00000000..d41accd2
--- /dev/null
+++ b/tests/test_consumption_empty_registry_no_op.py
@@ -0,0 +1,92 @@
+"""Empty-registry no-op invariant for the canonical en_core_math_v1 pack.
+
+Loads the live ``frame_registry`` and ``composition_registry`` against
+the production pack and asserts the empty-registry contract holds:
+
+- both registries load without error
+- both report ``is_empty() == True`` (no ratified entries currently)
+- the canonical lexicon ``load_lexicon`` continues to work unchanged
+  (no manifest-schema regression from adding the new optional fields)
+- the composition-consult fallback in ``inject_from_match`` is a no-op
+  when registry is empty (a synthetic match with a populated
+  composition_shape anchor still returns ``()``)
+
+If a future PR ratifies frame or composition entries, this test will
+need updating in lockstep — it is the canary for the no-op invariant.
+"""
+
+from __future__ import annotations
+
+from evals.refusal_taxonomy.shape_categories import ShapeCategory
+from generate.comprehension.composition_registry import (
+    clear_cache as clear_composition_cache,
+    load_composition_registry,
+)
+from generate.comprehension.frame_registry import (
+    clear_cache as clear_frame_cache,
+    load_frame_registry,
+)
+from generate.comprehension.lexicon import load_lexicon
+from generate.math_candidate_parser import CandidateInitial
+from generate.math_problem_graph import InitialPossession, Quantity
+from generate.recognizer_anchor_inject import inject_from_match
+from generate.recognizer_match import RecognizerMatch
+
+
+def setup_function(_):
+    clear_frame_cache()
+    clear_composition_cache()
+
+
+def test_frame_registry_loads_and_is_empty_on_canonical_pack():
+    reg = load_frame_registry()
+    assert reg.is_empty()
+    assert reg.source_pack_id == "en_core_math_v1"
+
+
+def test_composition_registry_loads_and_is_empty_on_canonical_pack():
+    reg = load_composition_registry()
+    assert reg.is_empty()
+    assert reg.source_pack_id == "en_core_math_v1"
+
+
+def test_lexicon_load_unaffected_by_new_manifest_fields():
+    # The manifest schema gained optional ``frame_checksum`` and
+    # ``composition_checksum`` fields. The existing lexicon loader
+    # MUST be unaffected when those fields are absent (current state).
+    lex = load_lexicon()
+    assert lex.source_pack_id == "en_core_math_v1"
+    assert len(lex.by_surface) > 0
+
+
+def test_inject_from_match_composition_consult_is_noop_when_registry_empty():
+    """Even a fully-populated anchor produces no admission when registry empty."""
+
+    class _FakeRec:
+        spec_id = "test"
+
+    composed = CandidateInitial(
+        initial=InitialPossession(
+            entity="John",
+            quantity=Quantity(value=1200, unit="dollars"),
+        ),
+        source_span="3 vet appointments cost $400 each",
+        matched_anchor="has",
+        matched_value_token="1200",
+        matched_unit_token="dollars",
+        matched_entity_token="John",
+    )
+    match = RecognizerMatch(
+        recognizer=_FakeRec(),  # type: ignore[arg-type]
+        category=ShapeCategory.CURRENCY_AMOUNT,
+        outcome="admissible",
+        graph_intent="amount",
+        parsed_anchors=(
+            {
+                "composition_shape": "bound(count) × bound(unit_cost)",
+                "composed_initial": composed,
+            },
+        ),
+    )
+    # Empty registry — no entry to affirm the shape — refusal-preferring.
+    assert inject_from_match(match, "synthetic sentence") == ()
diff --git a/tests/test_consumption_partition.py b/tests/test_consumption_partition.py
new file mode 100644
index 00000000..da8a3ccb
--- /dev/null
+++ b/tests/test_consumption_partition.py
@@ -0,0 +1,75 @@
+"""Partition test — consumption registries are math-domain only.
+
+ADR-0167 partition: cognition ``TeachingChainProposal`` flow must not
+see math composition/frame artifacts and vice versa.
+
+The consumption registries (FrameRegistry, CompositionRegistry) read
+exclusively from the en_core_math_v1 pack. They do not import from
+cognition modules and cannot be reached via cognition code paths.
+"""
+
+from __future__ import annotations
+
+import ast
+from pathlib import Path
+
+
+def _module_imports(path: Path) -> set[str]:
+    tree = ast.parse(path.read_text(encoding="utf-8"))
+    out: set[str] = set()
+    for node in ast.walk(tree):
+        if isinstance(node, ast.Import):
+            for alias in node.names:
+                out.add(alias.name)
+        elif isinstance(node, ast.ImportFrom):
+            if node.module:
+                out.add(node.module)
+    return out
+
+
+def _repo_root() -> Path:
+    here = Path(__file__).resolve()
+    while here.parent != here and not (here / "pyproject.toml").exists():
+        here = here.parent
+    return here
+
+
+def test_frame_registry_imports_no_cognition_modules():
+    repo = _repo_root()
+    imports = _module_imports(
+        repo / "generate" / "comprehension" / "frame_registry.py"
+    )
+    cognition_taints = {
+        i for i in imports if i.startswith("cognition.") or i.startswith("teaching.cognition")
+    }
+    assert cognition_taints == set(), (
+        f"frame_registry imports cognition modules: {cognition_taints}"
+    )
+
+
+def test_composition_registry_imports_no_cognition_modules():
+    repo = _repo_root()
+    imports = _module_imports(
+        repo / "generate" / "comprehension" / "composition_registry.py"
+    )
+    cognition_taints = {
+        i for i in imports if i.startswith("cognition.") or i.startswith("teaching.cognition")
+    }
+    # Math-side teaching imports are fine (math_composition_ratification);
+    # cognition-side teaching imports are not.
+    assert cognition_taints == set(), (
+        f"composition_registry imports cognition modules: {cognition_taints}"
+    )
+
+
+def test_compile_modules_import_no_cognition():
+    repo = _repo_root()
+    for mod in ("compile_frames.py", "compile_compositions.py"):
+        imports = _module_imports(repo / "language_packs" / mod)
+        cognition_taints = {
+            i for i in imports
+            if i.startswith("cognition.") or i.startswith("teaching.cognition")
+        }
+        assert cognition_taints == set(), (
+            f"{mod} imports cognition modules: {cognition_taints}"
+        )
diff --git a/tests/test_frame_registry_load.py b/tests/test_frame_registry_load.py
new file mode 100644
index 00000000..14d2fba6
--- /dev/null
+++ b/tests/test_frame_registry_load.py
@@ -0,0 +1,217 @@
+"""CW-1 — frame_registry loader tests."""
+
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+import pytest
+
+from generate.comprehension.frame_registry import (
+    FrameRegistry,
+    FrameRegistryLoadError,
+    clear_cache,
+    load_frame_registry,
+    lookup,
+)
+from language_packs.compile_frames import compile_frames
+
+
+@pytest.fixture
+def empty_pack(tmp_path: Path) -> Path:
+    """A pack with manifest but no frames/ dir — empty-registry no-op."""
+    (tmp_path / "manifest.json").write_text(
+        json.dumps({"pack_id": "test_empty", "checksum": "deadbeef"}),
+        encoding="utf-8",
+    )
+    return tmp_path
+
+
+@pytest.fixture
+def populated_pack(tmp_path: Path) -> Path:
+    """Pack with two ratified frame entries + matching manifest checksum."""
+    frames_dir = tmp_path / "frames"
+    frames_dir.mkdir()
+    (frames_dir / "transfer_frame.jsonl").write_text(
+        json.dumps(
+            {
+                "surface_form": "gave",
+                "frame_category": "transfer_frame",
+                "polarity": "affirms",
+                "provenance": "test_provenance",
+                "evidence_hashes": ["dead"],
+            }
+        )
+        + "\n",
+        encoding="utf-8",
+    )
+    _, sha = compile_frames(tmp_path)
+    (tmp_path / "manifest.json").write_text(
+        json.dumps(
+            {
+                "pack_id": "test_populated",
+                "checksum": "deadbeef",
+                "frame_checksum": sha,
+            }
+        ),
+        encoding="utf-8",
+    )
+    return tmp_path
+
+
+def setup_function(_):
+    clear_cache()
+
+
+def test_empty_pack_returns_empty_registry(empty_pack: Path):
+    reg = load_frame_registry(empty_pack)
+    assert isinstance(reg, FrameRegistry)
+    assert reg.is_empty()
+    assert reg.source_pack_id == "test_empty"
+    assert dict(reg.by_surface) == {}
+
+
+def test_populated_pack_round_trip(populated_pack: Path):
+    reg = load_frame_registry(populated_pack)
+    assert not reg.is_empty()
+    entry = lookup(reg, "gave")
+    assert entry is not None
+    assert entry.surface_form == "gave"
+    assert entry.frame_category == "transfer_frame"
+    assert entry.polarity == "affirms"
+    assert entry.provenance == "test_provenance"
+
+
+def test_case_fold_on_lookup(populated_pack: Path):
+    reg = load_frame_registry(populated_pack)
+    assert lookup(reg, "GAVE") is not None
+    assert lookup(reg, "Gave") is not None
+
+
+def test_unknown_surface_returns_none(populated_pack: Path):
+    reg = load_frame_registry(populated_pack)
+    assert lookup(reg, "shouted") is None
+
+
+def test_manifest_checksum_mismatch_raises(populated_pack: Path):
+    manifest_path = populated_pack / "manifest.json"
+    payload = json.loads(manifest_path.read_text())
+    payload["frame_checksum"] = "f" * 64  # bogus
+    manifest_path.write_text(json.dumps(payload), encoding="utf-8")
+    clear_cache()
+    with pytest.raises(FrameRegistryLoadError, match="checksum mismatch"):
+        load_frame_registry(populated_pack)
+
+
+def test_declared_checksum_without_compiled_file_raises(tmp_path: Path):
+    (tmp_path / "manifest.json").write_text(
+        json.dumps(
+            {
+                "pack_id": "test",
+                "checksum": "deadbeef",
+                "frame_checksum": "f" * 64,
+            }
+        ),
+        encoding="utf-8",
+    )
+    with pytest.raises(FrameRegistryLoadError, match="frames.jsonl is missing"):
+        load_frame_registry(tmp_path)
+
+
+def test_deterministic_order_across_runs(populated_pack: Path):
+    reg1 = load_frame_registry(populated_pack)
+    clear_cache()
+    reg2 = load_frame_registry(populated_pack)
+    assert dict(reg1.by_surface) == dict(reg2.by_surface)
+    assert reg1.pack_manifest_sha256 == reg2.pack_manifest_sha256
+
+
+def test_invalid_polarity_raises(tmp_path: Path):
+    frames_dir = tmp_path / "frames"
+    frames_dir.mkdir()
+    (frames_dir / "bad.jsonl").write_text(
+        json.dumps(
+            {
+                "surface_form": "x",
+                "frame_category": "y",
+                "polarity": "maybe",
+                "provenance": "",
+                "evidence_hashes": [],
+            }
+        )
+        + "\n",
+        encoding="utf-8",
+    )
+    _, sha = compile_frames(tmp_path)
+    (tmp_path / "manifest.json").write_text(
+        json.dumps({"pack_id": "test", "checksum": "x", "frame_checksum": sha}),
+        encoding="utf-8",
+    )
+    with pytest.raises(FrameRegistryLoadError, match="invalid polarity"):
+        load_frame_registry(tmp_path)
+
+
+def test_conflicting_entries_for_same_surface_raise(tmp_path: Path):
+    frames_dir = tmp_path / "frames"
+    frames_dir.mkdir()
+    (frames_dir / "transfer.jsonl").write_text(
+        json.dumps(
+            {
+                "surface_form": "gave",
+                "frame_category": "transfer_frame",
+                "polarity": "affirms",
+                "provenance": "p1",
+                "evidence_hashes": [],
+            }
+        )
+        + "\n",
+        encoding="utf-8",
+    )
+    (frames_dir / "decrement.jsonl").write_text(
+        json.dumps(
+            {
+                "surface_form": "gave",
+                "frame_category": "decrement_frame",
+                "polarity": "affirms",
+                "provenance": "p2",
+                "evidence_hashes": [],
+            }
+        )
+        + "\n",
+        encoding="utf-8",
+    )
+    _, sha = compile_frames(tmp_path)
+    (tmp_path / "manifest.json").write_text(
+        json.dumps({"pack_id": "test", "checksum": "x", "frame_checksum": sha}),
+        encoding="utf-8",
+    )
+    with pytest.raises(FrameRegistryLoadError, match="conflicting entries"):
+        load_frame_registry(tmp_path)
+
+
+def test_cache_returns_same_instance(populated_pack: Path):
+    reg1 = load_frame_registry(populated_pack)
+    reg2 = load_frame_registry(populated_pack)
+    assert reg1 is reg2  # cache hit
+
+
+def test_compiled_bytes_are_byte_stable(tmp_path: Path):
+    frames_dir = tmp_path / "frames"
+    frames_dir.mkdir()
+    (frames_dir / "a.jsonl").write_text(
+        json.dumps(
+            {
+                "surface_form": "gave",
+                "frame_category": "transfer_frame",
+                "polarity": "affirms",
+                "provenance": "p",
+                "evidence_hashes": [],
+            }
+        )
+        + "\n",
+        encoding="utf-8",
+    )
+    bytes1, sha1 = compile_frames(tmp_path)
+    bytes2, sha2 = compile_frames(tmp_path)
+    assert bytes1 == bytes2
+    assert sha1 == sha2