nit: I'd be less aggressive on the regex because I find it annoying to have to update the test whenever the error message changes. Maybe just checking the first sentence + checking a link to docs shows up in there somewhere?

I think this could merit a specific example of what this looks like, maybe just in the triggers docs? And we could link to it from the error message?

Like

Troubleshooting: Triggers.wrapDB called multiple times in a single mutation

This usually happens if a mutation is directly calling another mutation, for instance:

export const joinTeam = mutation(...)
export const createTeam = mutation({
	handler: (ctx) => {
		const currentUserId = // load from auth
		const team = await ctx.db.insert("teams", { creatorId: currentUserId, ... })
		// ❌ This creates a new `Triggers` since it's calling another mutation
		await joinTeam({ teamId })
	}
})

See for the recommended pattern.