Strong copyleft
OpenRoots and GNU Affero General Public License v3.0
Incompatible for derivatives. The hosted case is the one to check hardest.
Inbound
noAGPL-3.0 material entering an OpenRoots work
Everything true of GPL-3.0, plus section 13, which extends the source obligation to users interacting over a network. Both bite.
Outbound
noOpenRoots material entering a AGPL-3.0 project
Same as GPL-3.0.
Mechanism
Where the pairing holds and where it breaks.
A matrix cell tells you the answer. These are the clauses that produce it.
Derivative works
One combined, distributable artifact.Not permissible under current terms, in either direction.
Composite distribution
Both shipped side by side, not merged.Aggregation only, and with more care than GPL-3.0 because the network clause reaches hosted deployments that never distribute a binary.
Patent position
Express grants and termination triggers.As GPL-3.0.
The royalty
Where the Canopy obligation bites.The section 10 problem is identical. Section 13 adds a second one for any Canopy-tier adopter running a hosted service, since it would owe source to every network user.
Current permanent terms
What holds for as long as the release exists.As GPL-3.0. No automatic conversion changes the answer.
Other pairs