go-security

go-security is a skill for Claude Code, Codex from Dankosik/go-service-template-rest. It costs 37 tokens per session (382 once invoked), scanned A, original, MIT.

A guide for reviewing security through attacker paths: how an untrusted request could reach an identity, permission check, protected data, secret, or outbound service. It is designed for Go services.

In plain words
What is it for?
Use it when changing authentication, authorization, tokens, secrets, request handling, outbound requests, or other trust boundaries in a Go project.
Why use it?
It helps find missing identity checks, unclear tenant boundaries, unsafe destinations, injection risks, and other ways a security control could be bypassed.

Skill for Claude CodeCodex

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

Good fit Use it when changing authentication, authorization, tokens, secrets, request handling, outbound requests, or other trust boundaries in a Go project.

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

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/dankosik/go-service-template-rest/go-security"><img src="https://agentmods.dev/badge/skills/dankosik/go-service-template-rest/go-security.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 382 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 $0.00382
Opus 5 $0.00018 $0.00191
Sonnet 5 $0.00007 $0.00076
Haiku 4.5 $0.00004 $0.00038

Measured 2d ago against content hash f552e074df0c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

go-security 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 2d 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.

.agents/skills/go-security/SKILL.md · 37 lines

What it actually says

Go Security

Security work walks attacker paths from trust boundary through principal, authority, asset, enforcement point, attacker action, and observable denial.

boundary -> principal -> enforcement -> action -> failure -> negative proof

For a delegated Decision or Review, or when the active artifact requires its result interface, load the shared specialist contract. From every caller-controlled entrypoint to an asset or observable denial, build AttackerPath{boundary, principal, asset, enforcement, action, failure, denial_proof} across route exposure, verified identity, objects reached, outbound destinations, secrets, and caller-controlled work. Missing identity, ambiguous tenant, or absent policy denies. Every accepted control needs focused negative proof because an allow test also passes against a bypass.

Decide against existing owners: internal/infra/oidcjwt verifies tokens, api/openapi/service.yaml declares default auth, internal/infra/httpclient pins destinations, and internal/config separates secret inputs. Load the reference selector for identity, exposure, interpreter input, outbound destination, work amplification, or a secret sink.

For a Decision, disposition every reachable path with fail-closed behavior and negative proof. For Review, follow each path into the shared finding envelope; no findings still requires the focused deny proof. Load access control when the credential, permission, or revocation mechanism itself is open.

Files

What ships with it

7 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. 2d ago Changed · +2 lines f552e074df0c
  2. 10d ago First seen · 35 lines · 37 tokens per session scan A bed603685cb4

Subscribe to this mod's changes

go-security is a skill published in the GitHub repository Dankosik/go-service-template-rest (7 stars, last pushed yesterday), licensed MIT. It adds 37 tokens to every session and 382 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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