Share Go caches across worktrees without serializing lint

.github/workflows/ci.yaml

@@ -29,17 +29,16 @@ jobs:
           path: |
             ~/go/pkg/mod
             ~/.cache/go-build
-            .cache/golangci-lint
-          key: go-v1-${{ runner.os }}-${{ runner.arch }}-${{ steps.go.outputs.go-version }}-${{ hashFiles('go.mod', 'go.sum') }}-${{ github.sha }}
+            ~/.cache/golangci-lint
+          key: go-v2-${{ runner.os }}-${{ runner.arch }}-${{ steps.go.outputs.go-version }}-${{ hashFiles('go.mod', 'go.sum') }}-${{ github.sha }}
           restore-keys: |
-            go-v1-${{ runner.os }}-${{ runner.arch }}-${{ steps.go.outputs.go-version }}-${{ hashFiles('go.mod', 'go.sum') }}-
-            go-v1-${{ runner.os }}-${{ runner.arch }}-${{ steps.go.outputs.go-version }}-
+            go-v2-${{ runner.os }}-${{ runner.arch }}-${{ steps.go.outputs.go-version }}-${{ hashFiles('go.mod', 'go.sum') }}-
+            go-v2-${{ runner.os }}-${{ runner.arch }}-${{ steps.go.outputs.go-version }}-
       - uses: moonrepo/setup-toolchain@v0
         with:
           moon-version: "2.5.5"
       - run: rustup toolchain install 1.98.1 --profile minimal
       - run: rustup default 1.98.1
-      - run: mkdir -p "$HOME/.cache/go-build"
       - name: Check affected tasks
         id: ci
         run: moon ci

.moon/tasks/all.yml

@@ -1,6 +1,6 @@
 env:
   GOCACHE: ${HOME}/.cache/go-build
-  GOTMPDIR: ${HOME}/.cache/go-build
+  GOLANGCI_LINT_CACHE: ${HOME}/.cache/golangci-lint
 taskOptions:
   cache: false
   unixShell: bash

README.md

@@ -155,7 +155,12 @@ history, source-based affected selection, and plain `moon ci`. It runs the same
 project tasks used locally; aggregate checks and maintenance commands are excluded
 from automatic selection. The same `moon.yml` also works as a Listenbox submodule.
 
-Go modules, compiler output, and golangci-lint data are cached. Moon task results
+Moon sets `GOCACHE` to `~/.cache/go-build` on macOS and Linux, shared across
+worktrees. Modules use Go's shared module cache (`go env GOMODCACHE`). Moon uses
+`~/.cache/golangci-lint` for linter data; temporary files use the system temp
+directory. The same cache locations apply in standalone and parent workspaces.
+The lint task allows parallel runners without the global linter lock.
+Moon task results
 are not restored across CI runs. Sources, module files, fixtures, templates, and
 configuration determine affected tasks; `$CI` is not an input. CI verifies
 formatting, and selected Go tests bypass Go's test-result cache. Native Moon

moon.yml

@@ -47,9 +47,7 @@ tasks:
         gofmt -w .
       fi
       go vet ./...
-      mkdir -p .cache/golangci-lint-tmp
-      GOLANGCI_LINT_CACHE="${GOLANGCI_LINT_CACHE:-$PWD/.cache/golangci-lint}" \
-        TMPDIR="$PWD/.cache/golangci-lint-tmp" go tool golangci-lint run ./...
+      go tool golangci-lint run --allow-parallel-runners ./...
     options:
       cache: true
   check: