docs(stateless): add mega_getBlockWitness RPC reference page

AGENTS.md

@@ -16,7 +16,7 @@ The site is organized into layers, each targeting a different audience:
 | ----------------------- | --------------------------------------------------------- | ------------------------------- | ---------------------------------- |
 | **User Guide**          | `docs/user/`                                              | End users (wallets, DeFi users) | Plain language, no code            |
 | **Developer Docs**      | `docs/dev/`                                               | Dapp/contract builders          | Practical guidance, code examples  |
-| **Stateless Validator** | `docs/stateless/`                                         | Node operators                  | Reference, copy-paste commands     |
+| **Stateless Validator** | `docs/node/`                                              | Node operators                  | Reference, copy-paste commands     |
 | **Specification**       | [mega-evm repo](https://github.com/megaeth-labs/mega-evm) | Protocol implementers, auditors | Normative (MUST/SHALL), exhaustive |
 
 Each layer has its own `AGENTS.md` with layer-specific writing rules.
@@ -43,8 +43,8 @@ It does not live in this repo — do not create or edit `docs/spec/` files here.
 │   │   ├── read/              # Reading from MegaETH (RPC, realtime API)
 │   │   │   └── rpc/           # RPC method reference pages
 │   │   └── execution/         # EVM differences, gas model, resource limits
-│   └── stateless/             # Stateless Validator layer
-│       ├── AGENTS.md          # Stateless layer writing rules
+│   └── node/                  # Stateless Validator layer
+│       ├── AGENTS.md          # Node layer writing rules
 │       └── *.md
 ├── .sisyphus/plans/           # Restructure planning docs
 └── .github/workflows/

docs/AGENTS.md

@@ -10,7 +10,7 @@ The documentation has two tonal registers depending on where a page lives:
   Build an argument. Walk the reader through reasoning. Explain _why_ things are the way they are.
   These pages read like a well-written technical blog post — engaging, flowing prose that tells a story.
 
-- **Layer pages** (`user/`, `dev/`, `stateless/`, `spec/`) use a **terse, reference tone**.
+- **Layer pages** (`user/`, `dev/`, `node/`, `spec/`) use a **terse, reference tone**.
   Short declarative sentences. Sentence fragments in table cells. Facts first, explanation second.
   Optimized for scanning and quick lookup. Each layer's `AGENTS.md` has additional tone rules.
 

docs/SUMMARY.md

@@ -43,4 +43,5 @@
 
 ## Node Operation
 
-- [Stateless Validation](stateless/stateless-validator.md)
+- [Stateless Validation](node/stateless-validation.md)
+  - [Get Block Witness](node/witness.md)

docs/stateless/stateless-validator.md → docs/node/stateless-validation.md

@@ -313,6 +313,7 @@ Histograms like `block_validation_time_seconds`, `witness_verification_time_seco
 
 ## Related pages
 
+- [Get Block Witness](witness.md) — `mega_getBlockWitness` RPC reference and witness data layout
 - [Architecture](../architecture.md) — how transactions flow through MegaETH and where validators fit in
 - [stateless-validator source](https://github.com/megaeth-labs/stateless-validator) — Rust client source code
 - [SALT](https://github.com/megaeth-labs/salt) — MegaETH's state trie and witness format