docs: add YAML frontmatter to skill files to make them proper skills

- Add YAML frontmatter to aitbc-ai-operations.md
- Add YAML frontmatter to aitbc-basic-operations.md
- Add YAML frontmatter to aitbc-blockchain-troubleshooting.md
- Add YAML frontmatter to aitbc-marketplace.md
- Add YAML frontmatter to aitbc-multi-node-operations.md
- Add YAML frontmatter to aitbc-node-coordination.md
- aitbc-cli.md and aitbc.md already had YAML frontmatter
- All 8 skill files now have proper YAML frontmatter for Hermes agents to load

docs/skills/aitbc-wallet-management.md

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+# AITBC Wallet Management Skill
+
+## Trigger Conditions
+Activate when user requests wallet operations: creation, listing, balance checking, wallet information retrieval, import, export, or deletion.
+
+## Purpose
+Create, list, import, export, and manage AITBC blockchain wallets with deterministic validation.
+
+## Prerequisites
+- AITBC CLI accessible at `/opt/aitbc/aitbc-cli`
+- Python venv activated for CLI operations
+- Keystore directory at `/var/lib/aitbc/keystore/`
+- SSH access to follower node (aitbc1) for cross-node operations
+- Default wallet password: from `/var/lib/aitbc/keystore/.genesis_password`
+
+## Operations
+
+### Create Wallet
+```bash
+./aitbc-cli create --name <wallet_name> --password <password>
+```
+
+### Import Wallet
+```bash
+./aitbc-cli import --name <wallet_name> --private-key <hex_key> --password <password>
+```
+
+### Export Wallet
+```bash
+./aitbc-cli export --name <wallet_name> --password <password>
+```
+
+### List Wallets
+```bash
+./aitbc-cli list
+
+# With JSON format
+./aitbc-cli list --format json
+```
+
+### Check Wallet Balance
+```bash
+./aitbc-cli balance --name <wallet_name>
+```
+
+### Delete Wallet
+```bash
+./aitbc-cli delete --name <wallet_name>
+```
+
+### Rename Wallet
+```bash
+./aitbc-cli rename --old <old_name> --new <new_name>
+```
+
+### Get Transaction History
+```bash
+./aitbc-cli transactions --name <wallet_name> --limit <limit> --format [table|json]
+```
+
+## Common Pitfalls
+
+1. **Wallet Not Found:** Check wallet name spelling, verify keystore directory at `/var/lib/aitbc/keystore/`
+2. **Invalid Password:** Verify password, check password file at `/var/lib/aitbc/keystore/.genesis_password`
+3. **Invalid Private Key:** Ensure private key is valid hex string (64 hex characters for Ed25519)
+4. **Wallet Already Exists:** Choose a different wallet name or delete existing wallet first
+5. **Insufficient Balance:** Check wallet balance before sending transactions
+6. **Keystore Encryption:** CLI supports AES-256-GCM and Fernet encryption
+7. **Cross-Node Issues:** Verify SSH connectivity for operations on remote nodes
+
+## Verification Checklist
+- [ ] Wallet created successfully and appears in list
+- [ ] Wallet balance retrieved correctly
+- [ ] Private key export works with correct password
+- [ ] Import from private key creates valid wallet
+- [ ] Wallet deletion removes wallet from list
+- [ ] Transaction history shows past transactions
+
+## Wallet Naming Conventions
+- Use alphanumeric characters, hyphens, and underscores only
+- Avoid special characters and spaces
+- Use descriptive names (e.g., "genesis", "hermes-trainee", "trading-wallet")
+- Max length: 64 characters
+
+## Security Considerations
+- Never share private keys
+- Store passwords securely (use password file when possible)
+- Backup keystore directory regularly
+- Use strong passwords (minimum 12 characters)
+- Enable encryption for sensitive wallets
+
+## CLI Tool Preference
+- **Primary CLI:** `/opt/aitbc/aitbc-cli` is the single CLI entry point
+- **Keystore Location:** `/var/lib/aitbc/keystore/`
+- **Password File:** `/var/lib/aitbc/keystore/.genesis_password`