Re: tag sharing [was: Re: release-candidate/0.6 redux]

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+From: Jesse Rosenthal <jrosenthal@jhu.edu>\r
+To: Jameson Graef Rollins <jrollins@finestructure.net>,\r
+       Carl Worth <cworth@cworth.org>, Notmuch Mail <notmuch@notmuchmail.org>\r
+Subject: Re: tag sharing [was: Re: release-candidate/0.6 redux]\r
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+Date: Wed, 08 Jun 2011 15:18:47 -0400\r
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+On Wed, 08 Jun 2011 10:46:57 -0700, Jameson Graef Rollins <jrollins@finestructure.net> wrote:\r
+> Did you guys try to address the issue of tag removal at all?  I've been\r
+> trying to decide if this is something we need to worry about or not.\r
+> For instance, if cworth pushed a tag ".needs-review", you would probably\r
+> want to have that tag removed if cworth removed it.  I guess\r
+> alternatively he could just push the tag ".reviewed" to nullify the\r
+> meaning of the previous one.  I'm not sure that would work in all cases,\r
+> though.\r
+\r
+Yes, if he deletes the tag "public.needs-review" in his notmuch, and\r
+then pushes it, it will delete the tag "cworth.needs-review" from yours.\r
+\r
+A couple points about this:\r
+\r
+1. If you added your own "needs-review" tag to things that have a\r
+"cworth.needs-review" tag, that wouldn't be deleted. In other words,\r
+cworth's actions will only affect that namespace. Now, if you delete it,\r
+and push it, and Carl pulls back from you (meaning he trusts you), then\r
+it would be deleted on his. When he pushes next, it will be deleted on\r
+everyone who pulls from him.\r
+\r
+I'm sure there are resolution paradoxes here. It only had a ten-minute\r
+trial run one day on IRC with me and someone else.\r
+\r
+2. The history is available. If you run `nm-remote history msg-id`, it\r
+will show you its history of being added and deleted. I think it will\r
+show by whom it was added or deleted as well, but I don't quite remember\r
+(I hacked this up over a year ago).\r
+\r