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godebug

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Compare two Go release binaries before you deploy. Reads the build information Go embeds (go version -m) and reports dirty builds, dependency downgrades, changed checksums, local replace directives, toolchain, CGO, build tags, trimpath, ldflags and DefaultGODEBUG changes. Refuses empty, garbled or cut-off input. Claude Code skill and Go CLI.

  • Updated Nov 2, 2026
  • Go

Find what makes a Go program slow to start. A Claude Code skill and Go CLI that reads GODEBUG=inittrace=1 output, takes medians over runs, totals init time and allocations by module, shows the import chain behind each slow package, and compares two builds for CLI and cold start regressions.

  • Updated Nov 2, 2026
  • Go

Before you raise the go line in go.mod, see which GODEBUG behavior defaults change (ServeMux routing, TLS, x509, GOMAXPROCS and more), which binaries import each affected package, and the godebug lines that keep old behavior. A Claude Code skill and Go CLI that asks your installed toolchain, offline.

  • Updated Nov 15, 2026
  • Go

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