docs: add v0.4.0 Contexture layer release notes

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: richard-peng-xia

README.md

@@ -58,6 +58,7 @@ metaclaw start --mode skills_only  # skills only, no RL (no Tinker needed)
 
 ## 🔥 News
 
+- **[03/24/2026]** **v0.4.0** — Contexture layer: MetaClaw now persists cross-session memory for users and projects. Relevant facts, preferences, and project history are automatically retrieved and injected into prompts. Includes adaptive memory policy, background consolidation, and an optional memory sidecar service.
 - **[03/24/2026]** **v0.3.3** — One-click OpenClaw plugin: MetaClaw now ships as a native OpenClaw extension — drop the folder into OpenClaw's extensions, run one command, and everything is set up automatically.
 - **[03/18/2026]** Our technical report "[MetaClaw: Just Talk -- An Agent That Meta-Learns and Evolves in the Wild](https://arxiv.org/pdf/2603.17187)" is out! **🏆 Ranked No. 1** on [HuggingFace Daily Papers](https://huggingface.co/papers/2603.17187)! Check it out!
 - **[03/16/2026]** **v0.3.2** — Multi-claw support: IronClaw, PicoClaw, ZeroClaw, CoPaw, NanoClaw, and NemoClaw now supported alongside OpenClaw. NanoClaw connected via new `/v1/messages` Anthropic-compatible endpoint; NemoClaw via OpenShell inference routing. Added OpenRouter as a supported LLM platform.