The docs/ directory contains Optimism documentation closely tied to the implementation details of the monorepo (https://github.com/ethereum-optimism/optimism).
The directory layout is divided into the following sub-directories.
postmortems/: Timestamped post-mortem documents.security-reviews: Audit summaries and other security review documents.fault-proof-alpha: Information on the alpha version of the fault proof system.