observable-outcome-tests-over-mocks

observable-outcome-tests-over-mocks is a skill for Claude Code, Codex from AllanWessels/Bratan. It costs 44 tokens per session (1,634 once invoked), scanned A, original, no licence file.

A testing approach that checks results a user can observe instead of replacing the code layer where a bug might occur with a mock. Mocks are test substitutes that imitate other parts of a system.

In plain words
What is it for?
Use it to write tests that exercise the full relevant code path and finish by checking visible output or another user-observable result.
Why use it?
A mock can hide bugs in the very layer being tested. Driving the same path as the user makes the test more likely to catch failures that affect real behaviour.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it to write tests that exercise the full relevant code path and finish by checking visible output or another user-observable result.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/allanwessels/bratan/observable-outcome-tests-over-mocks
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 AllanWessels/Bratan --skill observable-outcome-tests-over-mocks
Clone the repo
git clone --depth 1 https://github.com/AllanWessels/Bratan

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 observable-outcome-tests-over-mocks

README.md
[![agentmods](https://agentmods.dev/badge/skills/allanwessels/bratan/observable-outcome-tests-over-mocks/github.svg)](https://agentmods.dev/skills/allanwessels/bratan/observable-outcome-tests-over-mocks)
Your own site
<a href="https://agentmods.dev/skills/allanwessels/bratan/observable-outcome-tests-over-mocks"><img src="https://agentmods.dev/badge/skills/allanwessels/bratan/observable-outcome-tests-over-mocks/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 observable-outcome-tests-over-mocks

Your own site · 80×15
<a href="https://agentmods.dev/skills/allanwessels/bratan/observable-outcome-tests-over-mocks"><img src="https://agentmods.dev/badge/skills/allanwessels/bratan/observable-outcome-tests-over-mocks.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,634 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 unknown 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 $0.00044 $0.01634
Opus 5.5 $0.00018 $0.00654
Sonnet 5.5 $0.00009 $0.00327
Haiku 4.5 $0.00004 $0.00163

Measured 2mo ago against content hash 4f06ea98d214, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

observable-outcome-tests-over-mocks 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 2mo 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.

docs/build-skills/observable-outcome-tests-over-mocks/SKILL.md · 180 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 2mo ago First seen · 180 lines · 44 tokens per session scan A 4f06ea98d214

Subscribe to this mod's changes

observable-outcome-tests-over-mocks is a skill published in the GitHub repository AllanWessels/Bratan (2 stars, last pushed 3mo ago), with no licence file. It adds 44 tokens to every session and 1,634 once invoked, about $0.0002 per session on Opus 5.5. 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.

Related

Other skills, from other repositories

evidence-audit

Evidence-led audit/fix rounds for any codebase in any language. Finds only defects that a runnable proof reproduces on current code, applies the narrowest in-scope patch, verifies with a second proof, promotes high-risk proofs to permanent regression tests, and reports exact validation results. Use whenever the user…

WrongStack/WrongStack · 152 tokens

debugging

Use this skill when something is broken and the cause is unknown — a failing test, a crash, an error message, wrong output, a regression, a hang, or behaviour that differs between environments — and it has to be found and fixed at the root. Also use it to build the failing proof for a suspected defect before fixing…

WrongStack/WrongStack · 148 tokens

testing

Use this skill when writing, fixing, reviewing, or planning tests in any project, in whatever runner the project already uses. Also use it to write the failing proof for a suspected bug and to promote that proof into a durable regression test. Triggers: user says "test", "unit test", "integration test", "e2e", "mock"…

WrongStack/WrongStack · 116 tokens

verify-before-done

Use this skill before telling the user a code change is finished, fixed, or working — to prove it with the project's own checks and report exactly what was and wasn't verified. Triggers: finishing an implementation or fix, writing the final summary of code changes, "done", "is it working", "did you test it", "make…

WrongStack/WrongStack · 84 tokens

visual-regression

Detect unintended UI changes with reproducible rendered screenshots and reviewed baselines. Use when adding screenshot checks or investigating layout/theme regressions; do not approve a changed image merely to make the test green.

WrongStack/WrongStack · 43 tokens

design-qa-checklist

Build a QA checklist for verifying that a build matches the design. Use at implementation review. For the spec engineers build from, use handoff-spec.

Owl-Listener/designer-skills · 37 tokens