It basically follows the Bogleheads approach: https://www.bogleheads.org/wiki/Getting_started
You get roughly your age as the percentage invested in bonds, with some adjustments up or down for risk tolerance. For taxable accounts, the bonds will be VTEB (tax-free munis). For nontaxable accounts, the bonds will be VCIT/VWOB (corporate bonds / emerging market bonds). The stock ETFs are VTI (US), VEA (foreign developed), and VWO (emerging markets). Nontaxable accounts also get VNQ (real estate), based on how much real estate you already own.
For example, my taxable account is: 60% VTI, 18% VEA, 12% VWO, 10% VTEB
Tax-loss harvesting is a bit tricky. In order to tax-loss harvest, you have to sell one ETF and buy another correlated ETF. This is usually done by purchasing another company's ETFs (ex: Schwab). Unfortunately, while Vanguard charges no fees for its own ETFs, it does charge fees for others' ETFs.
The algorithm takes this into account though, so it only initiates a harvest if the tax refund you'd get is significantly larger than the cost of buying the non-vanguard ETF. In order to make this cheaper, VTI is paired with VOO - even though the index tracked is different, they are highly correlated with each other (>99%).
VTI (Total US Stock market) / VOO (S&P 500)
VEA (FTSE Developed All Cap ex US, 3735 stocks) / SCHF (FTSE Developed ex-US, 1471 stocks)
VWO (FTSE Emerging Markets All Cap China) / SCHE (FTSE Emerging Index)
The Bogleheads forum is also often very useful for getting your personal finance questions answered, though of course the usual Internet stranger disclaimer applies.