Rather than store password locally, or keep prompting for it every day, could instead look at timestamp/hash of the encrypted vault stored by the browser. E.g. Firefox on OS X stores it in ~/Library/Application Support/LastPass/*.act.sxml. Other locations are listed on the LastPass site. Looks like the file is named in such a way that it could be checked against the account info used during login (?).
Rather than store password locally, or keep prompting for it every day, could instead look at timestamp/hash of the encrypted vault stored by the browser. E.g. Firefox on OS X stores it in
~/Library/Application Support/LastPass/*.act.sxml. Other locations are listed on the LastPass site. Looks like the file is named in such a way that it could be checked against the account info used during login (?).