test-discipline

test-discipline is a skill for Claude Code, Codex from Azure-Samples/eShopLite. It costs 12 tokens per session (413 once invoked), scanned A, a copy of test-discipline, MIT.

A rule for keeping automated tests aligned with changes to public code interfaces and files. TDD, or test-driven development, is a related practice of using tests to guide changes; this add-on specifically requires test updates when APIs or counted resources change.

In plain words
What is it for?
Use it when changing function signatures, exported APIs, documentation pages, features, scenarios, or other resources referenced by test assertions.
Why use it?
It prevents stale tests from breaking continuous integration, the automated checks that run before code is accepted. It also catches expected file counts and lists that no longer match the project.

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/azure-samples/eshoplite/test-discipline
Any agent
npx skills add Azure-Samples/eShopLite --skill test-discipline
Clone the repo
git clone --depth 1 https://github.com/Azure-Samples/eShopLite

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 test-discipline

README.md
[![agentmods](https://agentmods.dev/badge/skills/azure-samples/eshoplite/test-discipline.svg)](https://agentmods.dev/skills/azure-samples/eshoplite/test-discipline)
Your own site
<a href="https://agentmods.dev/skills/azure-samples/eshoplite/test-discipline"><img src="https://agentmods.dev/badge/skills/azure-samples/eshoplite/test-discipline.svg" alt="Measured on agentmods" height="20"></a>
Per session 12 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 413 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod 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 $0.00012 $0.00413
Opus 5 $0.00006 $0.00206
Sonnet 5 $0.00002 $0.00083
Haiku 4.5 $0.00001 $0.00041

Measured 6d ago against content hash 6efe81cabcd2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

test-discipline 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.

Origin

This is a copy

100% identical to test-discipline — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.copilot/skills/test-discipline/SKILL.md · 38 lines

What it actually says

Context

When APIs or public interfaces change, tests must be updated in the same commit. When test assertions reference file counts or expected arrays, they must be kept in sync with disk reality. Stale tests block CI for other contributors.

Patterns

  • API changes → test updates (same commit): If you change a function signature, public interface, or exported API, update the corresponding tests before committing
  • Test assertions → disk reality: When test files contain expected counts (e.g., EXPECTED_FEATURES, EXPECTED_SCENARIOS), they must match the actual files on disk
  • Add files → update assertions: When adding docs pages, features, or any counted resource, update the test assertion array in the same commit
  • CI failures → check assertions first: Before debugging complex failures, verify test assertion arrays match filesystem state

Examples

Correct:

  • Changed auth API signature → updated auth.test.ts in same commit
  • Added distributed-mesh.md to features/ → added 'distributed-mesh' to EXPECTED_FEATURES array
  • Deleted two scenario files → removed entries from EXPECTED_SCENARIOS

Incorrect:

  • Changed spawn parameters → committed without updating casting.test.ts (CI breaks for next person)
  • Added built-in-roles.md → left EXPECTED_FEATURES at old count (PR blocked)
  • Test says "expected 7 files" but disk has 25 (assertion staleness)

Anti-Patterns

  • Committing API changes without test updates ("I'll fix tests later")
  • Treating test assertion arrays as static (they evolve with content)
  • Assuming CI passing means coverage is correct (stale assertions can pass while being wrong)
  • Leaving gaps for other agents to discover
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 · 38 lines · 12 tokens per session scan A 6efe81cabcd2

Subscribe to this mod's changes

test-discipline is a skill published in the GitHub repository Azure-Samples/eShopLite (168 stars, last pushed 2mo ago), licensed MIT. It adds 12 tokens to every session and 413 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to test-discipline, differing in 0 lines, and is treated as a copy.

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