eng-go-developer

eng-go-developer is a skill for Claude Code, Codex from oodaris/autocodex. It costs 18 tokens per session (306 once invoked), scanned A, original, MIT.

A guide for implementing Go services and libraries with explicit errors, tests, and reporting of failures that users can understand.

In plain words
What is it for?
Use it to add or refactor Go logic, write edge-case tests, propagate errors, add observability, and run Go formatting, tests, and static checks.
Why use it?
It provides a consistent process for changing Go code while checking behavior, formatting, concurrency assumptions, and missing contracts.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/oodaris/autocodex/eng-go-developer
Any agent
npx skills add oodaris/autocodex --skill eng-go-developer
Clone the repo
git clone --depth 1 https://github.com/oodaris/autocodex

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for eng-go-developer

README.md
[![agentmods](https://agentmods.dev/badge/skills/oodaris/autocodex/eng-go-developer.svg)](https://agentmods.dev/skills/oodaris/autocodex/eng-go-developer)
Your own site
<a href="https://agentmods.dev/skills/oodaris/autocodex/eng-go-developer"><img src="https://agentmods.dev/badge/skills/oodaris/autocodex/eng-go-developer.svg" alt="Measured on agentmods" height="20"></a>
Per session 18 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 306 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00018 $0.00306
Opus 5 $0.00009 $0.00153
Sonnet 5 $0.00004 $0.00061
Haiku 4.5 $0.00002 $0.00031

Measured 6d ago against content hash 0c38811aa85c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

eng-go-developer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/eng-go-developer/SKILL.md · 52 lines

What it actually says

Go Developer

Repo anchors (autocodex)

  • INTERNAL_PATH: internal/
  • TEST_COMMANDS
    • go test ./...
    • go vet ./...
    • gofmt -w $(rg --files -g '*.go')

When to use

  • Implementing or refactoring Go logic, services, or libraries.

Preconditions

  • Scope and expected behavior are defined.
  • If contracts must change, STOP and update contracts first.

Inputs to confirm

  • Target package and entry points
  • Concurrency expectations
  • Required tests

Required artifacts

  • Go code with explicit errors
  • Tests for happy path and edge cases
  • Observability hooks for user-visible failures

Quick path

  • Implement small, composable functions.
  • Add tests and run Go checks.

Steps

  1. Implement with explicit errors and context propagation.
  2. Avoid global state; inject dependencies.
  3. Add tests.

Failure modes and responses

  • Missing contracts: stop and update specs.
  • No tests: block until tests are added.

Definition of done

  • Code is correct, tested, and observable.

Example (minimal)

  • Change: add a new internal package.
  • Checks: gofmt + go test + go vet.
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 6d ago First seen · 52 lines · 18 tokens per session scan A 0c38811aa85c

Subscribe to this mod's changes

eng-go-developer is a skill published in the GitHub repository oodaris/autocodex (16 stars, last pushed 6mo ago), licensed MIT. It adds 18 tokens to every session and 306 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.