go-coder

go-coder is a skill for Claude Code, Codex from Dankosik/go-service-template-rest. It costs 37 tokens per session (406 once invoked), scanned A, original, MIT.

A Go implementation guide for turning an agreed behavior into production code, focused tests, cleanup, and proof. Go is a programming language commonly used for backend services and command-line tools.

In plain words
What is it for?
Use it to implement authorized Go changes, extend an existing policy path, add focused tests, inspect affected boundaries, and remove unnecessary helpers.
Why use it?
It helps keep changes attached to the correct existing owner and observable behavior instead of spreading unfinished work across extra layers.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents); mentions AGENTS.md.

Good fit Use it to implement authorized Go changes, extend an existing policy path, add focused tests, inspect affected boundaries, and remove unnecessary helpers.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/dankosik/go-service-template-rest/go-coder
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.

Any agent
npx skills add Dankosik/go-service-template-rest --skill go-coder
Clone the repo
git clone --depth 1 https://github.com/Dankosik/go-service-template-rest

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 go-coder

README.md
[![agentmods](https://agentmods.dev/badge/skills/dankosik/go-service-template-rest/go-coder/github.svg)](https://agentmods.dev/skills/dankosik/go-service-template-rest/go-coder)
Your own site
<a href="https://agentmods.dev/skills/dankosik/go-service-template-rest/go-coder"><img src="https://agentmods.dev/badge/skills/dankosik/go-service-template-rest/go-coder/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for go-coder

Your own site · 80×15
<a href="https://agentmods.dev/skills/dankosik/go-service-template-rest/go-coder"><img src="https://agentmods.dev/badge/skills/dankosik/go-service-template-rest/go-coder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 406 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00037 $0.00406
Opus 5 $0.00018 $0.00203
Sonnet 5 $0.00007 $0.00081
Haiku 4.5 $0.00004 $0.00041

Measured yesterday against content hash 48b5a6634f1a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

go-coder 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 yesterday.

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.

.agents/skills/go-coder/SKILL.md · 44 lines

What it actually says

Go Coder

Implementation starts at the earliest valid owner and ends at the accepted observable behavior.

criterion -> earliest owner -> canonical path -> far-side observer -> falsifier -> cleanup -> proof

Before editing, bind accepted criteria to current owners, observables, and focused proof. Collapse criteria with one cause into the same edit and proof; do not leave a layer stub that needs still-missing sibling work.

Extend the existing policy path instead of creating a parallel path. Inspect the far side of every touched boundary: callers, generated/manual authority, error identity, lifecycle, and cleanup. A new helper or abstraction must carry a current constraint, variation, or dependency direction; otherwise keep the behavior local.

Before freeze, delete or inline each new helper, layer, or configuration seam whose removal preserves accepted behavior and current Engineering constraints.

Apply the Evidence Contract before adding a test. State why it rejects missing or wrong behavior. Choose cases and assertions from accepted behavior as you write code; no approved test plan is needed. Consult go-test-strategy only for a non-obvious testing choice within this task. Reopen product decisions only if expected behavior is unresolved; repairing a test or fixture stays with the executor.

Implementation is complete when each criterion has a causal edit or grounded no-change disposition and its test/proof implementation, no superseded path, and no unresolved implementation choice. The active workflow owns validation timing and task completion. Load one matching implementation reference only when its pressure changes the method.

Files

What ships with it

5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. yesterday Changed · -3 lines 48b5a6634f1a
  2. 2d ago Changed · +6 lines f5b9c86a01a1
  3. 9d ago First seen · 41 lines · 37 tokens per session scan A aaf1ccf69b3d

Subscribe to this mod's changes

go-coder is a skill published in the GitHub repository Dankosik/go-service-template-rest (7 stars, last pushed today), licensed MIT. It adds 37 tokens to every session and 406 once invoked, about $0.0002 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 2026-08-31.

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