0.4.0 Catch-up release covering Phase 3-6 + velocity-identity. The Unity SDK now mirrors the chain's full action surface as of 2026-05-03. Phase 3 (fixed-shop swap pools): - CreateSwapPoolAsync, SetSwapRateAsync, SwapAsync, ListSwapPoolsAsync, GetSwapPoolAsync. - SwapPool with client-side Quote() that matches chain math. Phase 4 (AMM pools): - CreateAmmPoolAsync, AddLiquidityAsync, RemoveLiquidityAsync, AmmSwapAsync, ListAmmPoolsAsync, GetAmmPoolAsync. - AmmCurve mirroring velocity_core::amm — SwapOutput, IntegerSqrt, MINIMUM_LIQUIDITY = 1000. - AmmPool with QuoteSwap() for byte-exact chain-equivalent previews. Phase 5 (flash loans): - FlashSwapAsync + FlashStep variants (Swap / Transfer / AddLiquidity / RemoveLiquidity). - FlashFee with FLASH_FEE_BPS = 5 and ceil-divide ComputeFlashFee. Phase 6 (capability payment): - NamespaceCapability enum + snake_case wire converter. - CapabilityPrices, GetCapabilityPricesAsync, PurchaseCapabilityAsync. velocity-identity bearer-token client: - IdentityClient(baseUrl, bearerToken) with GetMeAsync, GetLinksAsync, IssueSigningClaimAsync. - UserProfile, SigningClaim, VelocityAccountRef DTOs. - VelocityHttpClient.BearerToken pass-through for any future bearer-auth surface. Custodial-mode wrappers throughout — signed-envelope variants (caller-signed Mint / Transfer / Swap / etc.) land in 0.5.0 once chain-side wire shapes are confirmed (filed at siblings-comms/ blockchain/unity-sdk-asking-phase-3-6-wire-shapes.md).