  This STScI Working Group (WG) was charged with soliciting community feedback
and evaluating the strategic planning for exoplanet science with JWST and HST
given the high quality of exoplanet observations, the significantly lengthened
mission lifetime for JWST, and the pronounced expansion of the field over the
last decade. We were charged with identifying key science themes, providing
recommendations on issues associated with optimal timing and scale of
resources, as well as providing a recommended DDT concept achievable with 500
hours of JWST time. We recommend a DDT concept to survey the atmospheres of
rocky-M dwarf exoplanets. It is critical to quickly survey a wide sample of
such targets to ascertain if they indeed host significant atmospheres, i.e.,
define the cosmic shoreline, and to identify high priority targets for future
follow-up. It is important for this effort to occur early in the mission
lifetime. In the context of strategic planning of exoplanet observations, it is
useful to estimate the expected exoplanet observational commitment over JWST's
lifetime. Given the current usage associated with exoplanets, extended over 20
cycles, it is anticipated that JWST will dedicate $\approx$30,000 hours to
exoplanet observations. We recommend efforts to support GO-driven programs that
will contribute to this unprecedented data product of JWST. Of the
$\approx$30,000 hours of anticipated JWST full-mission time dedicated to
exoplanets, we expect that 1/3 of it could, and perhaps inevitably would, form
a comprehensive, high S/N, panchromatic, 10$^4$ hour atmospheric survey of
planets. Such an observational sample would be a legacy archive that would
address a broad range of science questions across various populations of
planets. It would also bridge the direct imaging and transit communities and
involve a multitude of techniques to detect and characterize exoplanets.
