Fix USDT0 naming and FAQ formatting

STYLEGUIDE.md

@@ -48,9 +48,11 @@ Before returning any page, read it back and answer these four questions. Fix any
 | STABLE | Referring to the token (all caps) | Stable (when meaning the token), stable |
 | StableChain | Referring to the underlying settlement layer / protocol (capital S and C) | Stablechain, Stable chain, stablechain |
 | Stablechain | Only in the introductory definition ("Stable is the first Stablechain") | |
-| USDT | Referring to the asset | Tether (unless referring to the company) |
+| USDT | Referring to native USDT on a source chain, or to the broader asset where the distinction from USDT0 does not matter | Usdt, Tether (unless referring to the company) |
+| USDT0 | Referring to the omnichain asset, including Stable's native gas and settlement asset | Usdt0, USDT when referring specifically to the asset on Stable |
 
 - Use the product or protocol name exactly as branded (e.g., "LayerZero", "RedStone", "USDT0").
+- Never title-case an acronym or branded identifier. Write `USDT0`, `FAQ`, and `API`, not `Usdt0`, `Faq`, or `Api`.
 
 ### UI and keyboard actions
 
@@ -65,6 +67,11 @@ Before returning any page, read it back and answer these four questions. Fix any
 - Do not use title case (e.g., ~~"Gas Pricing And Fees"~~).
 - Vocs builds the right-side outline from your headings, so keep them short and scannable.
 
+### FAQ sections
+
+- In an FAQ section within a larger page, write each question as a `###` heading. This gives every question a visible hierarchy and a stable anchor.
+- On the dedicated `reference/faq.mdx` page, write each question as a bold paragraph ending in `?`. The structured-data parser uses that format to generate `FAQPage` question-and-answer entries.
+
 ## Frontmatter
 
 Every page must include these three fields, in this order:
@@ -120,6 +127,12 @@ Every page has exactly one home in the sidebar. Edit only the `/en` section of `
 
 When a concept is relevant to multiple sections (e.g., a Learn concept that readers also need mid-task in Build), keep it in its canonical section and surface it from the others through **content**, not navigation. Link to it from the relevant overview page inline. Concepts live in one place; task-oriented sections point at them.
 
+### Sidebar labels
+
+- Use sentence case for English sidebar labels.
+- Preserve the exact capitalization of acronyms, standards, and branded identifiers such as `USDT0`, `FAQ`, `API`, `JSON-RPC`, and `EIP-7702`.
+- Match the destination page's title unless the surrounding navigation provides context that allows a shorter label.
+
 ## Page structure
 
 Follow this general pattern:

docs/pages/en/explanation/bank-module.mdx

@@ -39,4 +39,4 @@ The full method signatures, event payloads, and authorization flow are in the [B
 
 - [**Bank precompile reference**](/en/reference/bank-module-api): Call `transfer`, `approve`, `mint`, `burn`, and read events.
 - [**System modules overview**](/en/explanation/system-modules-overview): Return to the full list of precompile-exposed modules.
-- [**USDT as gas**](/en/explanation/usdt-as-gas-token): Understand the dual-role asset model the bank module manages.
+- [**USDT0 as gas**](/en/explanation/usdt-as-gas-token): Understand the dual-role asset model the bank module manages.

docs/pages/en/explanation/confidential-transfer.mdx

@@ -53,6 +53,6 @@ Confidential Transfer is in development. See [Roadmap](/en/explanation/technical
 
 ## Next recommended
 
-- [**USDT as gas**](/en/explanation/usdt-as-gas-token): Understand the asset model confidential transfers shield.
+- [**USDT0 as gas**](/en/explanation/usdt-as-gas-token): Understand the asset model confidential transfers shield.
 - [**Flow of funds**](/en/explanation/flow-of-funds): See where confidentiality fits in the end-to-end payment lifecycle.
 - [**Roadmap**](/en/explanation/technical-roadmap): Track when confidential transfer ships.

docs/pages/en/explanation/eip-7702.mdx

@@ -47,5 +47,5 @@ After submission, the EOA's account code is set to the delegate. Subsequent tran
 ## Next recommended
 
 - [**Account Abstraction (EIP-7702)**](/en/reference/eip-7702-api): Implement batch payments, spending limits, and session keys against a delegate contract.
-- [**USDT as gas**](/en/explanation/usdt-as-gas-token): Understand the gas model that EIP-7702 transactions run on.
+- [**USDT0 as gas**](/en/explanation/usdt-as-gas-token): Understand the gas model that EIP-7702 transactions run on.
 - [**Gas waiver**](/en/explanation/gas-waiver): Compare delegation to gas-waived flows where an application pays the user's gas instead.

docs/pages/en/explanation/erc-3009.mdx

@@ -91,6 +91,6 @@ This property is what makes ERC-3009 on Stable a strong foundation for higher-le
 
 **See also:**
 
-- [USDT as Gas](/en/explanation/usdt-as-gas-token)
+- [USDT0 as gas](/en/explanation/usdt-as-gas-token)
 - [USDT0 Behavior on Stable](/en/explanation/usdt0-behavior)
 - [x402 (HTTP-Native Payments)](/en/explanation/x402)

docs/pages/en/explanation/ethereum-comparison.mdx

@@ -46,7 +46,7 @@ On Stable, transaction fees are paid in USDT0, not a volatile native token. This
 
 - Users need USDT0 in their wallet to submit transactions.
 - The `value` field in transactions still works for sending USDT0, similar to how ETH is sent on Ethereum.
-- See [USDT as gas](/en/explanation/usdt-as-gas-token) for details.
+- See [USDT0 as gas](/en/explanation/usdt-as-gas-token) for details.
 
 ### 3. No priority tips
 
@@ -74,6 +74,6 @@ USDT0 functions as both the native gas token and an ERC-20 token. This introduce
 
 ## Next recommended
 
-- [**USDT as gas**](/en/explanation/usdt-as-gas-token): Understand the asset model that replaces ETH for gas.
+- [**USDT0 as gas**](/en/explanation/usdt-as-gas-token): Understand the asset model that replaces ETH for gas.
 - [**Gas pricing**](/en/explanation/gas-pricing): Review the single-component fee model in detail.
 - [**USDT0 behavior on Stable**](/en/explanation/usdt0-behavior): Audit contracts for dual-role asset semantics, allowance safety, and `EXTCODEHASH` behavior.

docs/pages/en/explanation/flow-of-funds.mdx

@@ -60,6 +60,6 @@ The conversion logic (e.g., BTC → USDT) may be handled by an exchange partner,
 
 ## Next recommended
 
-- [**USDT as gas**](/en/explanation/usdt-as-gas-token): Understand how USDT0 serves as both native gas and ERC-20 balance on Stable.
+- [**USDT0 as gas**](/en/explanation/usdt-as-gas-token): Understand how USDT0 serves as both native gas and ERC-20 balance on Stable.
 - [**Bridging USDT0 to Stable**](/en/explanation/usdt0-bridging): See how USDT0 moves onto Stable from other chains via OFT Mesh or Legacy Mesh.
 - [**Send your first USDT0**](/en/tutorial/send-usdt0): Submit a USDT0 transfer on testnet using standard EVM tooling.

docs/pages/en/explanation/gas-pricing.mdx

@@ -36,5 +36,5 @@ Stable accepts EIP-1559 (Type 2) transactions, but `maxPriorityFeePerGas` is alw
 ## Next recommended
 
 - [**Gas pricing reference**](/en/reference/gas-pricing-api): Construct transactions, estimate gas, and configure tooling against Stable's fee model.
-- [**USDT as gas**](/en/explanation/usdt-as-gas-token): See how USDT0 serves as both native gas and ERC-20 balance.
+- [**USDT0 as gas**](/en/explanation/usdt-as-gas-token): See how USDT0 serves as both native gas and ERC-20 balance.
 - [**Ethereum comparison**](/en/explanation/ethereum-comparison): Review every behavior difference you'll encounter porting from Ethereum.

docs/pages/en/explanation/gas-waiver.mdx

@@ -56,4 +56,4 @@ For flows where the user does hold USDT0 but wants to bundle multiple calls into
 
 - [**Enable gas-free transactions**](/en/how-to/integrate-gas-waiver): Integrate the hosted Waiver Server API with API-key submission and NDJSON responses.
 - [**Gas waiver protocol**](/en/reference/gas-waiver-api): Read the full protocol spec: marker routing, wrapper format, governance controls.
-- [**USDT as gas**](/en/explanation/usdt-as-gas-token): Understand the gas token that the waiver covers.
+- [**USDT0 as gas**](/en/explanation/usdt-as-gas-token): Understand the gas token that the waiver covers.

docs/pages/en/explanation/key-features.mdx

@@ -19,7 +19,7 @@ Stable is a delegated Proof-of-Stake Layer 1 with single-slot finality, full EVM
 
 ## USDT-specific features
 
-- [**USDT as gas**](/en/explanation/usdt-as-gas-token): USDT0 serves as both the native gas token and an ERC-20 token on the same balance.
+- [**USDT0 as gas**](/en/explanation/usdt-as-gas-token): USDT0 serves as both the native gas token and an ERC-20 token on the same balance.
 - [**Gas waiver**](/en/explanation/gas-waiver): Governance-authorized waivers submit wrapper transactions that execute at zero gas price on the user's behalf.
 - [**Guaranteed blockspace**](/en/explanation/guaranteed-blockspace): Enterprise partners secure reserved capacity in every block for payment flows.
 - [**USDT transfer aggregator**](/en/explanation/usdt-transfer-aggregator): High-volume USDT0 transfers batch into parallelized, fault-tolerant settlement bundles.

docs/pages/en/explanation/learn-overview.mdx

@@ -16,7 +16,7 @@ diataxis: "explanation"
 ## USDT0 behavior
 
 - [**USDT0 behavior on Stable**](/en/explanation/usdt0-behavior): Dual-role balance, reconciliation events, and contract design rules.
-- [**USDT as gas**](/en/explanation/usdt-as-gas-token): Why Stable uses USDT0 to pay for gas and what that means for fees.
+- [**USDT0 as gas**](/en/explanation/usdt-as-gas-token): Why Stable uses USDT0 to pay for gas and what that means for fees.
 - [**Flow of funds**](/en/explanation/flow-of-funds): How USDT moves end-to-end across Stable.
 - [**USDT0 features**](/en/explanation/usdt-features-overview): Every USDT0-specific feature with links to each.
 

docs/pages/en/explanation/technical-roadmap.mdx

@@ -22,9 +22,9 @@ Status: **Live on mainnet.**
 
 A customized PoS consensus protocol built on CometBFT. Delivers deterministic finality and Byzantine fault tolerance up to one-third of validators. See [Consensus](/en/explanation/consensus) for the current implementation.
 
-### USDT as native gas: Live
+### USDT0 as native gas: Live
 
-USDT0 is the native asset for gas payment and value transfer, and simultaneously supports the ERC-20 surface (`approve`, `transfer`, `transferFrom`, `permit`). See [USDT as gas](/en/explanation/usdt-as-gas-token).
+USDT0 is the native asset for gas payment and value transfer, and simultaneously supports the ERC-20 surface (`approve`, `transfer`, `transferFrom`, `permit`). See [USDT0 as gas](/en/explanation/usdt-as-gas-token).
 
 ### Stable Pay & Stable Name: In progress
 

docs/pages/en/explanation/usdt-as-gas-token.mdx

@@ -1,10 +1,10 @@
 ---
-title: USDT as gas
+title: USDT0 as gas
 description: "How USDT0 functions as Stable's native gas token, replacing volatile assets for predictable transaction fees."
 diataxis: "explanation"
 ---
 
-# USDT as gas
+# USDT0 as gas
 
 **You pay fees in USDT0. No second token, no wrapping, no ETH-equivalent to keep topped up.** USDT0 serves as both the native gas token and an ERC-20 token on the same balance. The same asset that moves as payment also pays for the transaction that moves it. Fees are denominated in dollars, not a volatile native token.
 
@@ -272,25 +272,25 @@ Correct contract design on Stable requires:
 
 ## FAQ
 
-**We’re using USDT0 as the wrapped native token today. After this upgrade, which token should be treated as the wrapped native?**
+### Which token should integrations treat as the wrapped native token?
 
-USDT0 becomes both the native token and an ERC-20 token after the upgrade. You should use USDT0 directly, and wrapping or unwrapping is no longer required.
+USDT0 becomes both the native token and an ERC-20 token after the upgrade. Use USDT0 directly. You no longer need to wrap or unwrap it.
 
-**What happens to the original USDT0 contract address (`0x779Ded0c9e1022225f8E0630b35a9b54bE713736`)?**
+### What happens to the original USDT0 contract address?
 
-Nothing changes. The same address remains valid and continues to represent USDT0.
+Nothing changes. `0x779Ded0c9e1022225f8E0630b35a9b54bE713736` remains valid and continues to represent USDT0.
 
-**After the upgrade, is the native token address `0x779Ded0c9e1022225f8E0630b35a9b54bE713736` (instead of `0x0000000000000000000000000000000000001000`)?**
+### Which address identifies the native token?
 
-Yes. After the upgrade, the native token identifier/address is `0x779Ded0c9e1022225f8E0630b35a9b54bE713736`.
+The native token identifier is `0x779Ded0c9e1022225f8E0630b35a9b54bE713736`, not `0x0000000000000000000000000000000000001000`.
 
-**What about `0x0000000000000000000000000000000000001000`? Is it still used as the token address for gUSDT, and should we keep it on our side?**
+### Should integrations keep the former gUSDT address?
 
-No. You can remove it. It will not be used after the upgrade.
+No. You can remove `0x0000000000000000000000000000000000001000`. It isn't used after the upgrade.
 
-**For DEX calldata, will protocols stop using `0x0000000000000000000000000000000000001000` as the “native token” identifier and use `0x779Ded0c9e1022225f8E0630b35a9b54bE713736` instead?**
+### Which native token identifier should DEX calldata use?
 
-Correct. After the upgrade, DEXs should use `0x779Ded0c9e1022225f8E0630b35a9b54bE713736` as the native token identifier.
+DEX calldata should use `0x779Ded0c9e1022225f8E0630b35a9b54bE713736` as the native token identifier.
 
 ## Next recommended
 

docs/pages/en/explanation/usdt-features-overview.mdx

@@ -24,7 +24,7 @@ Stable addresses each friction with a dedicated mechanism:
 
 | Friction | Mechanism | Page |
 | :--- | :--- | :--- |
-| Separate gas token | USDT0 is the native gas token | [USDT as gas](/en/explanation/usdt-as-gas-token) |
+| Separate gas token | USDT0 is the native gas token | [USDT0 as gas](/en/explanation/usdt-as-gas-token) |
 | User pays gas at all | Governance-authorized waivers cover gas | [Gas waiver](/en/explanation/gas-waiver) |
 | Cost and inclusion variance | Reserved block capacity for enrolled partners | [Guaranteed blockspace](/en/explanation/guaranteed-blockspace) |
 | Throughput ceiling | Parallelized USDT0 transfer batching | [USDT transfer aggregator](/en/explanation/usdt-transfer-aggregator) |
@@ -36,6 +36,6 @@ For the full set of Stable's differences from a general-purpose EVM chain, see [
 
 ## Next recommended
 
-- [**USDT as gas**](/en/explanation/usdt-as-gas-token): Understand the asset that replaces ETH for gas and payment at once.
+- [**USDT0 as gas**](/en/explanation/usdt-as-gas-token): Understand the asset that replaces ETH for gas and payment at once.
 - [**Flow of funds**](/en/explanation/flow-of-funds): Trace USDT from on-ramp through on-chain transfer to off-ramp settlement.
 - [**Bridging USDT0 to Stable**](/en/explanation/usdt0-bridging): See how USDT0 moves onto Stable from other chains.

docs/pages/en/explanation/usdt-transfer-aggregator.mdx

@@ -79,4 +79,4 @@ Stable's USDT Transfer Aggregator is a targeted optimization that maximizes thro
 
 - [**Payments use cases**](/en/explanation/payment-use-cases-overview): See the payment patterns that benefit most from aggregated throughput: P2P, subscriptions, pay-per-call.
 - [**Execution**](/en/explanation/execution): See the parallel execution engine the aggregator builds on.
-- [**USDT as gas**](/en/explanation/usdt-as-gas-token): Understand the asset model the aggregator moves.
+- [**USDT0 as gas**](/en/explanation/usdt-as-gas-token): Understand the asset model the aggregator moves.

docs/pages/en/explanation/usdt0-behavior.mdx

@@ -14,7 +14,7 @@ This page walks through each case and gives safe contract patterns. If you only
 
 USDT0 on Stable is both the native gas token and an ERC-20 token. This dual-role model affects balance behavior, contract design, and event handling. The sections below walk through every case where the dual role changes expected behavior.
 
-For background on why USDT0 operates this way, see [USDT as gas](/en/explanation/usdt-as-gas-token). To experience the behavior through real transfers, see [Send your first USDT0](/en/tutorial/send-usdt0).
+For background on why USDT0 operates this way, see [USDT0 as gas](/en/explanation/usdt-as-gas-token). To experience the behavior through real transfers, see [Send your first USDT0](/en/tutorial/send-usdt0).
 
 ## Balance reconciliation
 
@@ -180,6 +180,6 @@ Off-chain services and indexers should:
 
 ## Next recommended
 
-- [**USDT as gas**](/en/explanation/usdt-as-gas-token): Understand why USDT0 operates as both the native asset and an ERC-20 token.
+- [**USDT0 as gas**](/en/explanation/usdt-as-gas-token): Understand why USDT0 operates as both the native asset and an ERC-20 token.
 - [**Send your first USDT0**](/en/tutorial/send-usdt0): Submit a USDT0 transfer on testnet via native and ERC-20 paths.
 - [**Ethereum comparison**](/en/explanation/ethereum-comparison): Review every behavior difference when porting from Ethereum.

docs/pages/en/explanation/usdt0-bridging.mdx

@@ -146,4 +146,4 @@ The remaining steps follow the exact same path as [bridging USDT0 to Stable](#pa
 
 - [**Flow of funds**](/en/explanation/flow-of-funds): See the end-to-end lifecycle of USDT from on-ramp through settlement.
 - [**Bridge tutorial**](/en/tutorial/bridge-usdt0): Bridge Test USDT from Sepolia to Stable testnet using the LayerZero OFT Adapter.
-- [**USDT as gas**](/en/explanation/usdt-as-gas-token): Understand what the asset does once it lands on Stable.
+- [**USDT0 as gas**](/en/explanation/usdt-as-gas-token): Understand what the asset does once it lands on Stable.

docs/pages/en/explanation/use-case-payments.mdx

@@ -14,12 +14,12 @@ On general-purpose chains, users must hold a separate gas token (ETH, SOL) just
 
 ## How Stable addresses it
 
-- **USDT0 is both the gas token and the payment asset.** A user only ever needs one asset to send or receive. See [USDT as gas](/en/explanation/usdt-as-gas-token).
+- **USDT0 is both the gas token and the payment asset.** A user only ever needs one asset to send or receive. See [USDT0 as gas](/en/explanation/usdt-as-gas-token).
 - **Gas waiver lets applications cover gas on behalf of users**, enabling a zero-fee UX without the user touching a second token. See [Gas waiver](/en/explanation/gas-waiver).
 - **Single-slot finality means settlement is immediate.** Once a transfer is in a block, it's final. See [Ethereum comparison](/en/explanation/ethereum-comparison).
 
 ## Next recommended
 
-- [**USDT as gas**](/en/explanation/usdt-as-gas-token): Understand the asset that replaces ETH for gas and payment at once.
+- [**USDT0 as gas**](/en/explanation/usdt-as-gas-token): Understand the asset that replaces ETH for gas and payment at once.
 - [**Gas waiver**](/en/explanation/gas-waiver): See how applications cover user gas through governance-approved waiver addresses.
 - [**Ethereum comparison**](/en/explanation/ethereum-comparison): Review what changes (finality, gas token, priority tips) when moving from Ethereum.

docs/sidebar.json

@@ -59,7 +59,7 @@
           "collapsed": true,
           "items": [
             {
-              "text": "Usdt Features Overview",
+              "text": "USDT0 features overview",
               "link": "/en/explanation/usdt-features-overview"
             },
             {
@@ -75,11 +75,11 @@
               "link": "/en/explanation/bridge-security"
             },
             {
-              "text": "Usdt As Gas Token",
+              "text": "USDT0 as gas",
               "link": "/en/explanation/usdt-as-gas-token"
             },
             {
-              "text": "Usdt0 Behavior",
+              "text": "USDT0 behavior",
               "link": "/en/explanation/usdt0-behavior"
             },
             {
@@ -91,7 +91,7 @@
               "link": "/en/explanation/guaranteed-blockspace"
             },
             {
-              "text": "Usdt Transfer Aggregator",
+              "text": "USDT Transfer Aggregator",
               "link": "/en/explanation/usdt-transfer-aggregator"
             },
             {
@@ -277,19 +277,19 @@
               "collapsed": true,
               "items": [
                 {
-                  "text": "Send Usdt0",
+                  "text": "Send your first USDT0",
                   "link": "/en/tutorial/send-usdt0"
                 },
                 {
                   "text": "Zero Gas Transactions",
                   "link": "/en/how-to/zero-gas-transactions"
                 },
                 {
-                  "text": "Work With Usdt Gas",
+                  "text": "Work with USDT0 as gas",
                   "link": "/en/how-to/work-with-usdt-gas"
                 },
                 {
-                  "text": "Bridge Usdt0",
+                  "text": "Bridge USDT0 to Stable",
                   "link": "/en/tutorial/bridge-usdt0"
                 }
               ]
@@ -2063,4 +2063,4 @@
       ]
     }
   ]
-}
+}