Go Local Health Skill for Codex

Go Local Health

Overview

Provide a consistent, repeatable local workflow for Go test, coverage, and lint checks.

Use this to run fast snapshots, interactive test loops, and coverage inspection without re-deriving commands.

Guardrails (language + tooling)

• Confirm go.mod exists in the repo root before running anything. If missing, stop and ask.
• Run commands from the repo root so module settings and tooling config are discovered.
• Respect the repo’s Go toolchain configuration (go.mod + toolchain).
• Prefer repo-pinned tool versions (e.g., tools.go or go.mod tool directives). If tools are missing and no pins exist, ask before installing or adding pins.
• Required tools vary by mode:
• Quick Snapshot: go, tparse, golangci-lint
• Interactive Test Loop: lazygotest
• Coverage Explorer: gocovsh

If any required tool is missing, ask to install rather than using substitutes.

• All automated runs must be non-interactive. Only launch TUIs when the user explicitly requests them.

Workflow Decision Tree

• Use Quick Snapshot when you want a fast read on tests + coverage + lint.
• Use Interactive Test Loop when you are actively iterating on tests.
• Use Coverage Explorer when you need to inspect coverage hotspots in detail.
• If the repo is large, ask whether to scope to a package path before running full ./....

Quick Snapshot (tests + coverage + lint)

Preferred (scripted, deterministic):

~/.codex/skills/go-local-health/scripts/go-local-health --scope ./...

Manual fallback:

• Run tests with coverage and a one-screen summary:

go test -cover -json ./... | tparse

• Run lint with the repo’s configuration:

golangci-lint run ./...

If a narrower scope is requested, replace ./... with the specific package path.

Interactive Test Loop (lazygotest)

• Launch from the repo root:

lazygotest

• Use the UI to filter packages and re-run tests while editing code.

Coverage Explorer (gocovsh)

• Launch from the repo root:

gocovsh

• If a cover.out is required or preferred, generate it first:

go test -coverprofile=cover.out ./...

Reporting Back to the User

• Summarize failing packages, error types, and coverage gaps.
• If lint fails, report the top categories (not every line) and ask whether to fix now.
• If coverage is low, identify the worst packages and suggest next steps only if asked.

Non-Goals

• Do not run in non-Go repos.
• Do not swap in other tools or skip required checks.
• Do not change CI configuration or code unless the user asks.