According to Streetsblog
[San Francisco] Supervisor John Avalos plans to introduce a policy urging the SFPD to let people on bikes treat stop signs as yield signs. It could legitimize the safe, practical maneuver already practiced by the vast majority of people on bikes, which is legal in Idaho.
This isn't the Idaho Stop, as it doesn't allow cyclists to treat red lights as stop signs, and it isn't even the Colorado Safe Stop, because treating a stop sign as a yield sign will still be illegal. That's a state law and San Francisco can't overrule it. But it will basically decriminalize such behavior by creating a policy that would “make citations for bicyclists who safely yield at stop signs the lowest law enforcement priority.”
Further weakening it is this
the non-binding stop sign legislation would need support from SFPD officials to have a substantial impact.
Still, it's a step above the status quo.