A big point behind the CL Gardeners philosophy is that we can do a lot of good with a lot less effort by just doing things that don't require massive coordination with existing projects. Think gardening not landscape architecture. We just want to be on guard against trying to bite off too much at once. Imagine that we're all working in a huge garden spread all over a country estate. There are a zillion nooks and crannies where a gardener working alone can tend to a few plants and help them grow. Other places there might be an opportunity for a small team to reclaim a bit of overgrown, neglected land and put in some nice rose bushes or something. And it's also useful for people to walk through the garden and takes notes about what's where so we know what needs to be done. What we want to avoid is bringing in the bulldozers and backhoes and ripping everything up with a promise to put it all back together better than before.
Superseded by the Package and Resource Directory project:
Project Proposal: Package and Resource Directorywith a pointer to the appropriate project page and asking to have it blessed as an official CL Gardener's project.
Then we follow the Apache style voting rules: anyone can vote +1, +0, -0, or -1 (though -1 votes must be accompanied with a counterproposal or explanation). In the end only the votes of the Green Thumbs officially count but it's good for everyone else to take a look at the project and vote accordingly. The main criterion for approving a project is that it is well enough defined that a new Gardener can figure out what the project is about (and thus whether they're interested in helping out) and how to get started contributing.
Obviously since CL Gardeners is going to sponsor a lot of projects there's no need to vote against something just because you're not interested in it; only vote -1 if you think either that the project is poorly defined and thus likely to lead to gardeners wasting their time trying to work on it or if you really feel that doing it will somehow be contrary to the Gardeners' mission of making Common Lisp more attractive. I suspect the latter case will be quite rare.
If you're just going to wander over the paddock and pull out a few weeds on your way, you don't need a project. But you might visit the Gardeners Tea Room? beforehand and mention what you're just about to go and do - you might find someone is already headed in that direction, so you can tag along.
A convenient protocol would be to leave date, time, name and what you're up to. Anything more than a week old is probably done (or not) and long forgotten, so if your entry is still current you could update the date occasionally so folks know you're still doing it.