diff --git a/README.md b/README.md
index 5172ca5..61ede3b 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,8 @@ you need lower-level control.
 
 This repository is an experimental fork maintained by Data Clique Software
 Design FZCO in the `dataclique` GitHub organization. It contains work unrelated
-to ST0x, including the Haskell binding in 0.4.0.
+to ST0x, including the Haskell binding in 0.4.0 and the planned TypeScript
+binding in 0.5.0.
 
 The original Event Sorcery project remains owned and maintained by ST0x, with
 contributions from Data Clique Software Design FZCO and other contributors.
diff --git a/ROADMAP.md b/ROADMAP.md
index 4e2d8a5..a381e9a 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -36,6 +36,16 @@ flowchart TD
       backends and decisions
 - [ ] [#13 Durable protocols lack end-to-end cross-binding conformance coverage](https://github.com/dataclique/event-sorcery/issues/13)
 
+## TypeScript access to the shared engine
+
+Release 0.5.0 is intended to add a typed TypeScript binding over the shared Rust
+engine. The binding will reuse the same versioned engine contract rather than
+own storage or durable protocol decisions. Runtime integration, packaging, and
+the public TypeScript surface remain to be specified after 0.4.0; no TypeScript
+implementation is part of the current release.
+
+- [ ] [#50 TypeScript services cannot use the shared engine](https://github.com/dataclique/event-sorcery/issues/50)
+
 ## Not epic
 
 - [ ] [#6 sqlite_event_repository is SQLite-specific code inside the backend-agnostic core](https://github.com/dataclique/event-sorcery/issues/6)
diff --git a/SPEC.md b/SPEC.md
index 353b01c..1e97be7 100644
--- a/SPEC.md
+++ b/SPEC.md
@@ -17,6 +17,12 @@ typed language surfaces:
 - the current native Rust API; and
 - an idiomatic Haskell binding over a versioned C ABI.
 
+This specification governs the experimental fork hosted in the `dataclique`
+GitHub organization. The original Event Sorcery project remains owned and
+maintained by ST0x, with contributions from Data Clique Software Design FZCO
+and other contributors. Experimental bindings in this fork are not part of the
+ST0x project unless ST0x adopts them separately.
+
 The shared engine MUST be extracted from the implementation already present in
 this repository. It MUST continue to build on:
 
@@ -60,6 +66,17 @@ The following are explicitly out of scope for 0.4.0:
 
 Any such change requires a separate specification and compatibility decision.
 
+## 0.5.0 direction
+
+Release 0.5.0 is intended to add a typed TypeScript binding over the shared
+Rust engine. This records the release direction only; TypeScript implementation
+is outside the 0.4.0 scope and contract.
+
+The TypeScript binding MUST remain a veneer over the existing engine and MUST
+NOT introduce independent storage or durable protocol decisions. Its runtime
+integration, packaging, public surface, and conformance requirements require a
+separate 0.5.0 specification and compatibility decision.
+
 ## Architectural rule
 
 ```text