Five new /docs pages — Pull requests, Stacked pull requests, Rebase and restructure a stack, Merging stacks, and Stacks API — catalogued under a new Pull requests sidebar section. rest-api.md gains the pull request and stack routes and drops the stale claim that pull requests are unimplemented; issues.md notes pull requests share the issue number sequence. Docs-only plus catalog registration; every example verified against the controllers and domain modules.