diff --git a/README.md b/README.md
index 3c18fc2..7fafd7c 100644
--- a/README.md
+++ b/README.md
@@ -69,17 +69,6 @@ print(result)
 ````
 
 
-### Python SDK
-
-````bash
-from redactable import apply
-
-data = "Customer email: test@example.com"
-result = apply(data, policy="gdpr.yaml")
-print(result)
-# → "Customer email: ****@example.com"
-````
-
 ### Pandas Integration (Coming in v0.2)
 
 Pandas DataFrame support is planned for the next release. For now, apply redaction row-by-row:
diff --git a/pyproject.toml b/pyproject.toml
index bec5edd..88a3187 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "redactable"
-description = "One-line value prop."
+description = "Policy-driven framework for data redaction, masking, and privacy-preserving transformations."
 readme = "README.md"
 requires-python = ">=3.12"
 license = { text = "MIT" }
diff --git a/src/redactable/detectors/base.py b/src/redactable/detectors/base.py
index fb53247..e84ad70 100644
--- a/src/redactable/detectors/base.py
+++ b/src/redactable/detectors/base.py
@@ -3,10 +3,50 @@
 
 Contents:
 - Finding: dataclass representing a detected entity.
-- Detector: Protocol interface that all detectors must implement.
+- Match: dataclass for the module-level detection system.
+- Detector: Protocol interface that Finding-based detectors must implement.
 - Shared helper functions: digits_only, luhn_ok, guess_card_brand.
 """
 
+import re
+from dataclasses import dataclass
+from typing import Any, Iterable, Optional, Protocol
+
+# --------------------------------------------------------------------
+# Match-based detection types (used by individual detector modules)
+
+
+@dataclass(slots=True)
+class Match:
+    label: str               # e.g. "EMAIL", "CREDIT_CARD"
+    start: int               # byte/char index in the input text
+    end: int
+    value: str               # matched text (pre-transform)
+    confidence: float = 1.0  # 0..1
+    meta: dict[str, Any] | None = None
+
+
+# Simple registry
+_REGISTRY: dict[str, Any] = {}
+_LABEL_TO_DETECTORS: dict[str, list[str]] = {}
+
+
+def register(detector: Any) -> None:
+    _REGISTRY[detector.name] = detector
+    for label in detector.labels:
+        _LABEL_TO_DETECTORS.setdefault(label, []).append(detector.name)
+
+
+def get(name: str) -> Any:
+    return _REGISTRY[name]
+
+
+def detectors_for(label: str) -> list[Any]:
+    return [_REGISTRY[n] for n in _LABEL_TO_DETECTORS.get(label, [])]
+
+
+def all_detectors() -> list[Any]:
+    return list(_REGISTRY.values())
 import re
 from collections.abc import Iterable
 from dataclasses import dataclass
@@ -17,6 +57,11 @@
 Extras = dict[str, Any]
 
 
+
+# --------------------------------------------------------------------
+# Finding-based detection types (used by DetectorRegistry)
+
+
 @dataclass(slots=True)
 class Finding:
     """
@@ -33,10 +78,10 @@ class Finding:
 
     kind: str
     value: str
-    span: Span
+    span: tuple[int, int]
     confidence: float
-    normalized: str | None = None
-    extras: Extras | None = None
+    normalized: Optional[str] = None
+    extras: dict[str, Any] | None = None
 
     def __post_init__(self) -> None:
         if not (0.0 <= self.confidence <= 1.0):
@@ -81,7 +126,8 @@ def all_detectors() -> list[Detector]:
 # --------------------------------------------------------------------
 # Shared helpers
 
-_DIGITS = re.compile(r"\\D+")
+_DIGITS = re.compile(r"\D+")
+
 
 
 def digits_only(s: str) -> str:
diff --git a/src/redactable/detectors/entropy.py b/src/redactable/detectors/entropy.py
index f86798b..871c34b 100644
--- a/src/redactable/detectors/entropy.py
+++ b/src/redactable/detectors/entropy.py
@@ -12,11 +12,12 @@
 """
 
 import re
-from collections.abc import Iterable
+from typing import Iterable
 
-from .base import Finding, register
+from .base import Finding, Match, register
 from .utils import looks_like_secret, shannon_entropy
 
+# --------------------------------------------------------------------
 # Regex pattern: matches candidate secrets
 BASELIKE_PATTERN = re.compile(
     r"""
@@ -70,6 +71,7 @@ def detect(self, text: str) -> Iterable[Finding]:
 _TOKEN = re.compile(r"([A-Za-z0-9_\-=+/]{20,})")
 
 
+
 class EntropyDetector:
     name = "entropy"
 
diff --git a/src/redactable/hide.py b/src/redactable/hide.py
index 4e3cd4e..cf5111d 100644
--- a/src/redactable/hide.py
+++ b/src/redactable/hide.py
@@ -1,7 +1,3 @@
-"""
-Use this as a main entrypoint?
-"""
-
+from .decors import redactable_io
 from .decors import *  # noqa: F401, F403
-
-__all__: list[str] = []
+__all__ = ["redactable_io"]
diff --git a/src/redactable/transforms/tokenise.py b/src/redactable/transforms/tokenise.py
index 9ee88ad..07cc0db 100644
--- a/src/redactable/transforms/tokenise.py
+++ b/src/redactable/transforms/tokenise.py
@@ -1,8 +1,17 @@
-from collections.abc import Iterable
+import hashlib
+from typing import Iterable
 
 from redactable.detectors import Finding
 
 
+def _sha256(value: str, salt: str = "") -> str:
+    return hashlib.sha256((salt + value).encode("utf-8")).hexdigest()
+
+
+def tokenise_in_place(text: str, findings: Iterable[Finding], salt: str = "") -> str:
+
+
+
 def _mask(value: str, keep_head: int = 0, keep_tail: int = 4, glyph: str = "•") -> str:
     if len(value) <= keep_head + keep_tail:
         return glyph * len(value)
@@ -19,5 +28,6 @@ def mask_in_place(
     out = text
     for f in sorted(findings, key=lambda x: x.span[0], reverse=True):
         s, e = f.span
-        out = out[:s] + _mask(out[s:e], keep_head, keep_tail, glyph) + out[e:]
+        token = _sha256(f.normalized or f.value, salt)
+        out = out[:s] + token + out[e:]
     return out