docs(readme): update readme with enclave features and usage

README.md

@@ -1,6 +1,15 @@
 # Motr Enclave
 
-Extism WASM plugin providing encrypted key storage for Nebula wallet. Built with Go 1.25+ for `wasip1`.
+Extism WASM plugin providing encrypted key storage for the Nebula wallet. Built with Go 1.25+ for `wasip1` target.
+
+## Features
+
+- **WebAuthn Integration** - Device-bound credentials with PRF key derivation
+- **MPC Key Shares** - Secure threshold signature key storage
+- **Multi-Chain Support** - BIP44 derivation for Sonr, Ethereum, Bitcoin
+- **UCAN v1.0.0-rc.1** - Capability-based authorization with CID-indexed delegations
+- **Encryption at Rest** - AES-256-GCM encrypted database serialization
+- **SQLite Functions** - Custom functions for address derivation and signing
 
 ## Quick Start
 
@@ -32,16 +41,24 @@ import { createEnclave } from '@sonr/motr-enclave';
 
 const enclave = await createEnclave('/enclave.wasm');
 
-const { did, database } = await enclave.generate(credential);
+// Generate new identity with MPC key share
+const result = await enclave.generate(credentialBase64);
+// Returns: { did, enclave_id, public_key, accounts, database }
 
+// Load existing database
 await enclave.load(database);
 
+// List accounts across all chains
 const accounts = await enclave.exec('resource:accounts action:list');
 
+// Sign data with an enclave
+const signature = await enclave.exec('resource:enclaves action:sign subject:enclave_id:data_hex');
+
+// Query DID document
 const didDoc = await enclave.query();
 ```
 
-### CLI
+### CLI Testing
 
 ```bash
 make test-plugin
@@ -51,26 +68,70 @@ make test-plugin
 
 | Function | Input | Output |
 |----------|-------|--------|
-| `generate` | WebAuthn credential (base64) | DID + database buffer |
-| `load` | Database buffer | Success status |
-| `exec` | Filter string + optional UCAN | Action result |
+| `ping` | Message string | Echo response |
+| `generate` | WebAuthn credential (base64) | DID, enclave_id, public_key, accounts[], database |
+| `load` | Database buffer | Success status, DID |
+| `exec` | Filter string | Action result |
 | `query` | DID (optional) | DID document |
 
-## Database Schema
+### Exec Resources & Actions
 
-The database schema is defined in `db/schema.sql`.
+| Resource | Actions |
+|----------|---------|
+| `accounts` | list, get, sign |
+| `enclaves` | list, get, sign, rotate, archive, delete |
+| `credentials` | list, get |
+| `sessions` | list, revoke |
+| `grants` | list, revoke |
+| `delegations` | list, list_received, list_command, get, revoke, verify, cleanup |
+| `verification_methods` | list, get, delete |
+| `services` | list, get, get_by_id |
 
-![[.github/db-schema.png]]
+### Filter Syntax
+
+```
+resource:<name> action:<action> [subject:<value>]
+```
+
+Examples:
+```bash
+# List all accounts
+resource:accounts action:list
+
+# Get specific account
+resource:accounts action:get subject:sonr1abc...
+
+# Sign with enclave
+resource:enclaves action:sign subject:enc_123:48656c6c6f
+
+# List delegations by command
+resource:delegations action:list_command subject:/vault/read
+```
+
+## Architecture
+
+The enclave uses SQLite as a computation engine with custom functions:
+
+| Function | Purpose |
+|----------|---------|
+| `bip44_derive(pubkey, chain)` | Derive address from public key |
+| `bip44_derive_from_enclave(id, chain)` | Derive address from stored enclave |
+
+Supported chains: `sonr` (Cosmos 118), `ethereum` (60), `bitcoin` (0)
 
 ## Project Structure
 
 ```
 motr-enclave/
-├── main.go           # Go plugin source
+├── cmd/enclave/          # WASM plugin entry point
+├── internal/
+│   ├── keybase/          # Database layer + SQLite functions
+│   ├── crypto/mpc/       # MPC key operations
+│   ├── crypto/ucan/      # UCAN v1.0.0-rc.1 builders
+│   └── migrations/       # Schema + queries
 ├── src/                  # TypeScript SDK
 ├── dist/                 # Built SDK
-├── example/          # Browser test app
-├── db/               # SQLite schema
+├── example/              # Browser demo
 └── Makefile
 ```
 
@@ -80,4 +141,12 @@ motr-enclave/
 make test      # Run Go tests
 make lint      # Run linter
 make clean     # Remove build artifacts
+make generate  # Regenerate SQLC code
 ```
+
+## Documentation
+
+- [AGENTS.md](./AGENTS.md) - Architecture and coding guidelines
+- [TODO.md](./TODO.md) - Remaining implementation tasks
+- [CHANGELOG.md](./CHANGELOG.md) - Version history
+- [MIGRATION.md](./MIGRATION.md) - Original schema design