diff --git a/src/idea194_attractorforge_verified_attractor/adapters.py b/src/idea194_attractorforge_verified_attractor/adapters.py
index 63391a7..78dcd46 100644
--- a/src/idea194_attractorforge_verified_attractor/adapters.py
+++ b/src/idea194_attractorforge_verified_attractor/adapters.py
@@ -39,3 +39,25 @@ class ToyBioreactorAdapter:
         next_biomass = max(0.0, biomass + dt * (0.35 * substrate * biomass - self.decay * biomass - 0.03 * toxin + 0.02 * purge))
         next_toxin = max(0.0, toxin + dt * (0.05 * biomass - self.toxin_relaxation * toxin - 0.06 * purge))
         return (next_substrate, next_biomass, next_toxin)
+
+
+@dataclass(frozen=True, slots=True)
+class PlantAdapterShim:
+    """Lightweight shim that adapts existing step-style adapters to a
+    named PlantAdapter interface. This makes it easier to retarget compiled
+    attractors to different plant models without changing the compiler.
+
+    The shim simply forwards the step call to the underlying adapter but
+    provides a stable `name` attribute for logging/indexing.
+    """
+
+    underlying: object
+    name: str | None = None
+
+    def step(self, state: State, control: Control, dt: float) -> State:
+        # forward to underlying object which is expected to implement
+        # step(state, control, dt)
+        return self.underlying.step(state, control, dt)
+
+    def __repr__(self) -> str:  # pragma: no cover - trivial
+        return f"PlantAdapterShim(name={self.name or type(self.underlying).__name__})"
diff --git a/src/idea194_attractorforge_verified_attractor/compiler.py b/src/idea194_attractorforge_verified_attractor/compiler.py
index e301629..d6e3cb6 100644
--- a/src/idea194_attractorforge_verified_attractor/compiler.py
+++ b/src/idea194_attractorforge_verified_attractor/compiler.py
@@ -77,6 +77,33 @@ def _fingerprint(spec: AttractorSpec, gain: tuple[float, ...], controller_hash:
     return _hash_text(payload)
 
 
+def generate_attractor_fingerprint(
+    spec: AttractorSpec,
+    gain: tuple[float, ...],
+    controller_hash: str,
+    certificate_hash: str | None = None,
+    sample_call_len: int | None = None,
+) -> str:
+    """Public fingerprint generator for compact DTN admission.
+
+    The fingerprint is a deterministic SHA-256 hex of a small JSON payload
+    containing a few stable feature bits. The certificate_hash and a small
+    sample_call_len may be included when available to increase collision
+    resistance while keeping the output compact (64 hex chars).
+    """
+    payload = {
+        "spec_id": spec.spec_id,
+        "kind": spec.kind,
+        "gain_len": len(gain),
+        "ctrl_hash": controller_hash,
+    }
+    if certificate_hash:
+        payload["cert"] = certificate_hash[:16]
+    if sample_call_len is not None:
+        payload["calls"] = int(sample_call_len)
+    return _hash_text(_json(payload))
+
+
 class AttractorCompiler:
     def compile(self, spec: AttractorSpec) -> CompilationResult:
         spec = spec.normalized()
@@ -90,7 +117,13 @@ class AttractorCompiler:
             estimated_basin_radius=spec.basin_radius,
             convergence_rate_bound=spec.convergence_rate,
             controller_hash=_hash_text(_json({"gain": gain, "target": spec.target_state, "kind": spec.kind})),
-            attractor_fingerprint=_fingerprint(spec, gain, _hash_text(_json({"gain": gain, "target": spec.target_state, "kind": spec.kind}))),
+            attractor_fingerprint=generate_attractor_fingerprint(
+                spec,
+                gain,
+                _hash_text(_json({"gain": gain, "target": spec.target_state, "kind": spec.kind})),
+                certificate_hash=plan_cert.certificate_hash,
+                sample_call_len=len(plan_delta.steps),
+            ),
             dt=spec.dt,
         )
         return CompilationResult(controller=controller, plan_cert=plan_cert, plan_delta=plan_delta, basin_sketch=basin_sketch)
diff --git a/src/idea194_attractorforge_verified_attractor/verifier.py b/src/idea194_attractorforge_verified_attractor/verifier.py
new file mode 100644
index 0000000..136a42a
--- /dev/null
+++ b/src/idea194_attractorforge_verified_attractor/verifier.py
@@ -0,0 +1,38 @@
+from __future__ import annotations
+
+from typing import Tuple
+
+from .models import PlanCert
+
+
+def verify(cert: PlanCert, seed_id: str) -> Tuple[bool, float]:
+    """Prototype PlanCert verifier.
+
+    This is a tiny, deterministic verifier intended as a lightweight
+    on-device check. It is NOT a formal SMT/Lyapunov verifier; rather it
+    performs sanity checks on stable fields and returns a simple damage
+    score in [0,1] (0==low risk, 1==high risk) derived from the
+    robustness_margin and worst_case_cost.
+
+    Returns: (ok, damage_score)
+    """
+    # Basic structural checks
+    ok = True
+    if not isinstance(cert.certificate_hash, str) or len(cert.certificate_hash) != 64:
+        ok = False
+    if not isinstance(cert.witness_hash, str) or len(cert.witness_hash) != 64:
+        ok = False
+    if not isinstance(cert.merkle_root, str) or len(cert.merkle_root) == 0:
+        ok = False
+
+    # Damage heuristic: higher robustness margin relative to worst-case cost
+    # yields lower damage_score. Clamp to [0,1]. Add small epsilon to avoid div0.
+    try:
+        ratio = cert.robustness_margin / (cert.worst_case_cost + 1e-12)
+        damage = max(0.0, 1.0 - float(ratio))
+    except Exception:
+        damage = 1.0
+
+    # Ensure damage in [0,1]
+    damage_score = max(0.0, min(1.0, damage))
+    return ok, damage_score
diff --git a/tests/test_verifier_and_shim.py b/tests/test_verifier_and_shim.py
new file mode 100644
index 0000000..60aab3e
--- /dev/null
+++ b/tests/test_verifier_and_shim.py
@@ -0,0 +1,41 @@
+from idea194_attractorforge_verified_attractor import AttractorCompiler
+from idea194_attractorforge_verified_attractor.adapters import ToyOrbitalAdapter, PlantAdapterShim
+from idea194_attractorforge_verified_attractor.verifier import verify
+
+
+def test_plant_adapter_shim_forwards_step() -> None:
+    adapter = ToyOrbitalAdapter()
+    shim = PlantAdapterShim(underlying=adapter, name="orbital-shim")
+    state = (0.5, -0.5)
+    control = (0.1, -0.1)
+    next1 = adapter.step(state, control, 0.1)
+    next2 = shim.step(state, control, 0.1)
+    assert next1 == next2
+
+
+def test_verifier_returns_ok_and_damage_score() -> None:
+    spec = AttractorCompiler().compile(
+        AttractorCompiler().compile.__defaults__[0]
+    ) if False else None
+
+    # Instead of complex construction, compile a simple spec via known pattern
+    from idea194_attractorforge_verified_attractor import AttractorSpec
+
+    spec = AttractorSpec(
+        spec_id="v-demo",
+        kind="motion_manifold",
+        state_labels=("r", "t"),
+        target_state=(0.0, 0.0),
+        control_limit=0.5,
+        dt=0.1,
+        horizon=8,
+        basin_radius=0.5,
+        convergence_rate=0.2,
+        safety_margin=0.05,
+        objective="verify-demo",
+    )
+
+    result = AttractorCompiler().compile(spec)
+    ok, damage = verify(result.plan_cert, result.plan_delta.spec_id)
+    assert isinstance(ok, bool)
+    assert 0.0 <= damage <= 1.0