Joint.tools.firsts: def of ezx@1.11.0.0
Import: import ezx@1.11.0.0/src/ws/joint.bend as Joint
Lines 143-149 of ezx@1.11.0.0/src/ws/joint.bend: https://jend.leeeet.dev/read.txt?path=ezx@1.11.0.0/src/ws/joint.bend&start_line=143&end_line=149

import Base
import ezx@1.11.0.0/src/ledger/manifest.bend as M

# every tool, each name once, at its first declaration
def tools.firsts(ts: List<&2, M.Tool>) -> List<&2, M.Tool>:
  match ts:
    case []:
      []
    case +hd <> tl:
      hd <> tools.without(tools.firsts(tl), M.tool.name(hd))

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=ezx@1.11.0.0/src/ledger/manifest.bend&name=Tool
  https://jend.leeeet.dev/definition.txt?path=ezx@1.11.0.0/src/ledger/manifest.bend&name=tool.name
  https://jend.leeeet.dev/definition.txt?path=ezx@1.11.0.0/src/ws/joint.bend&name=tools.without