Development record

Go's test cache is never reused across worktrees, so every preflight runs all packages twice from scratch. A full preflight on 2026-11-01 reported 0 cached results of 133 packages. The cache keys on the test binary, and each worktree's absolute source paths change it: the same unchanged package in a second worktree re-ran, while with -trimpath it came straight from the cache. -trimpath cannot simply be switched on: nine test files locate the repository through runtime.Caller (internal/core/lint/releasereceipts_test.go, internal/core/launch/payload_completeness_test.go, internal/core/launch/scaffold/scaffold_test.go, and six in internal/surface/cli: hooks_sessionstart, hook_scripts, barerender, hooks_selfprovision, bootstrap, githook_prepush), and under -trimpath every one fails, since the path becomes the module path (open github.com/intentdriven/abcd/.github/workflows/release.yml: no such file or directory). Across the last 60 merges, about two thirds of all test time re-ran results that could not have changed.