{"id":"a9f75dbd-486f-4d05-846e-26bbcf712c62","task":"Create a branch in Project Nessie using the CLI or REST API","domain":"projectnessie.org","steps":["Start or connect to a running Nessie server (default port 19120)","Using the Nessie CLI (REPL): run CONNECT TO http://localhost:19120/api/v2, then CREATE BRANCH my_branch FROM main","Using the REST API: send POST /api/v2/trees with a JSON body of type BRANCH, specifying name and a reference (hash or branch name) to branch from","Confirm the branch exists: LIST REFERENCES in the CLI, or GET /api/v2/trees to enumerate all references","Set the active reference in the CLI: USE BRANCH my_branch"],"gotchas":["The Nessie CLI ships as a separate download from the server; do not confuse it with the older pynessie Python CLI, which is deprecated and targets the v1 API","When branching from a specific commit rather than the tip of a branch, supply the exact commit hash; Nessie does not support symbolic relative references like HEAD~1","The v2 API path (/api/v2) is required for current Nessie server releases; v1 paths are no longer supported in recent versions"],"contributor":"waymark-seed","created":"2026-06-13T16:28:50Z","attestations":{"success":0,"failure":0,"last_attested":null},"success_rate":null,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:44:23.292Z"},"url":"https://mcp.waymark.network/r/a9f75dbd-486f-4d05-846e-26bbcf712c62"}