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planning-with-files
83Organize Long AI Tasks with Planning Files
Long AI sessions can lose goals, decisions, and progress. This skill guides Claude, Codex, and Claude Code to store plans, findings, and logs in project files.
Productivity View
Skills test-driven-development
📦
test-driven-development
Content revision r1 Medium Risk ⚙️ External commands
Apply Test-Driven Development
Teams often ship changes without proof that tests catch the intended behavior. This skill guides Claude, Codex, and Claude Code through strict red, green, refactor steps.
Supports: Claude Codex Code(CC)
Install with my Agent
Copy this request to your Agent. It includes the canonical Skill page and manifest.
Agent request
Review the Skillstore skill "test-driven-development" from https://skillstore.io/skills/zhanlincui-test-driven-development.md and its manifest at https://skillstore.io/api/skills/zhanlincui-test-driven-development/manifest. Verify the artifact. You may proceed after verification, subject to the environment's own policy.Your Agent should still show its plan and request any confirmation required by the security policy.
Agent-readable resources
Use these links when an AI agent, crawler, or script needs clean context instead of reading the full page.
Test it
Using "test-driven-development". Add retry behavior for failed operations.
Expected outcome:
The agent starts with one failing retry test, verifies the failure, adds minimal retry logic, and confirms the test passes.
Using "test-driven-development". Fix empty email validation.
Expected outcome:
The agent writes a failing validation test, implements the smallest validation change, and keeps the full test suite passing.
Using "test-driven-development". Review tests that use many mocks.
Expected outcome:
The agent flags assertions about mock existence and recommends tests that verify user-visible or domain behavior.
Security Audit
Medium Riskv5 • 7/8/2026 Open versioned report
The static external-command and reconnaissance findings are false positives caused by markdown fences, examples, and ordinary testing language. I found one semantic risk: the skill encourages deleting implementation code when TDD was not followed, which can cause unwanted data loss without user confirmation.
2
Files scanned
672
Lines analyzed
0
Review items
0
False positives ignored
Confirmed security concerns (1)
Medium
Destructive Development Workflow Instruction
The skill repeatedly tells agents to delete implementation code and start over when TDD was not followed. This can destroy user work if applied without explicit confirmation or version-control safeguards.
The cited lines directly instruct deletion as a workflow response. The behavior is not malicious, but it creates a real risk of unwanted data loss in active workspaces.
Risk Factors
⚙️ External commands (27)
SKILL.md:33-35 SKILL.md:35-49 SKILL.md:49-69 SKILL.md:69-76 SKILL.md:76-90 SKILL.md:90-95 SKILL.md:95-104 SKILL.md:104-117 SKILL.md:117-119 SKILL.md:119-135 SKILL.md:135-146 SKILL.md:146-151 SKILL.md:151-162 SKILL.md:162-172 SKILL.md:172-174 SKILL.md:174-202 SKILL.md:202-203 SKILL.md:203-295 SKILL.md:295-300 SKILL.md:300-303 SKILL.md:303-306 SKILL.md:306-309 SKILL.md:309-316 SKILL.md:316-319 SKILL.md:319-322 SKILL.md:322-366 SKILL.md:366-369
Audited by: codex View Audit History →
Share & cite this report
Share the versioned assessment report, neutral badge, embed card, and citations. Skillstore reports evidence without deciding whether this Skill is safe.
Copy report link
https://skillstore.io/skills/zhanlincui-test-driven-development/audits/5?utm_source=security_passport&utm_medium=share&utm_campaign=versioned_reportMarkdown badge
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<a href="https://skillstore.io/skills/zhanlincui-test-driven-development?utm_source=security_passport_badge"><img src="https://skillstore.io/badges/skills/zhanlincui-test-driven-development/security.svg" alt="Skillstore security assessment" loading="lazy"></a>Embed card
<iframe src="https://skillstore.io/embed/skills/zhanlincui-test-driven-development.html" title="Skillstore Security Assessment" sandbox="allow-popups allow-popups-to-escape-sandbox" loading="lazy" referrerpolicy="no-referrer" width="420" height="180"></iframe>Academic citations (APA · BibTeX · CFF)
APA citation
ZhanlinCui. (2026). test-driven-development security audit report (audit version 5) [Author version unspecified]. Skillstore. https://skillstore.io/skills/zhanlincui-test-driven-development/audits/5BibTeX citation
@techreport{zhanlincui-zhanlincui-test-driven-development-2026,
author = {ZhanlinCui},
title = {test-driven-development security audit report (audit version 5)},
institution = {Skillstore},
year = {2026},
number = {5},
url = {https://skillstore.io/skills/zhanlincui-test-driven-development/audits/5},
note = {Author version unspecified}
}CITATION.cff
cff-version: 1.2.0
message: "If you use this Skill, cite its author and this versioned security audit report."
title: "test-driven-development security audit report (audit version 5)"
version: "unspecified"
type: report
authors:
- name: "ZhanlinCui"
date-released: "2026-07-08"
url: "https://skillstore.io/skills/zhanlincui-test-driven-development/audits/5"
identifiers:
- type: other
value: "skillstore:zhanlincui-test-driven-development:audit:5"
description: "Skillstore immutable audit report identifier"
Compare variants
10 installable variantsEach author remains a separate installable skill. The recommended variant is ranked by Skillstore evidence.
Why this variant is first
Highest Skillstore Score
Author / source Skillstore Score Evidence Confidence Skillstore usage Updated
DMJGilbert Recommended
dmjgilbert-test-driven-development
Skillstore Score 79
Evidence Confidence High
Skillstore usage 11
Updated
2026-09-09
obra-test-driven-development
Skillstore Score 78
Evidence Confidence High
Skillstore usage 11
Updated
2026-09-09
cycleaddict-test-driven-development
Skillstore Score 78
Evidence Confidence High
Skillstore usage 8
Updated
2026-09-09
cygnusfear-test-driven-development
Skillstore Score 78
Evidence Confidence High
Skillstore usage 7
Updated
2026-09-09
addyosmani-test-driven-development
Skillstore Score 78
Evidence Confidence Medium
Skillstore usage 1
Updated
2026-09-22
dyai2025-test-driven-development
Skillstore Score 75
Evidence Confidence Medium
Skillstore usage 10
Updated
2026-09-09
codingcossack-test-driven-development
Skillstore Score 74
Evidence Confidence High
Skillstore usage 14
Updated
2026-09-09
ZhanlinCui Current
zhanlincui-test-driven-development
Skillstore Score 69
Evidence Confidence High
Skillstore usage 102
Updated
2026-09-09
sickn33-test-driven-development
Skillstore Score 38
Evidence Confidence Medium
Skillstore usage 9
Updated
2026-09-09
davila7-test-driven-development
Skillstore Score 38
Evidence Confidence Medium
Skillstore usage 7
Updated
2026-09-09
Skillstore Score
Why this score Evidence Confidence: High 55
Architecture
85
Maintainability
85
Content
70
Community
83
Spec Compliance
What You Can Build
Implement a Feature Safely
Use the skill to define the expected behavior as a failing test before adding production code.
Fix a Regression
Reproduce the bug with a failing test, then implement the smallest change that makes it pass.
Improve Test Discipline
Use the checklist and anti-pattern guidance to review whether tests cover real behavior.
Try These Prompts
Start a Small Change
Use test-driven development for this change. First write one failing test for the expected behavior, then implement the minimum code.
Fix a Bug with Proof
Reproduce this bug with a failing test before changing production code. Show why the test fails, then make it pass.
Refactor Without Behavior Drift
Use existing tests or add missing characterization tests first. Refactor only after tests prove the current behavior is covered.
Audit Test Quality
Review these tests with the TDD and anti-pattern guidance. Identify tests that verify mocks instead of real behavior.
Best Practices
- Run the new test once before implementation and confirm the failure reason.
- Keep each test focused on one observable behavior.
- Refactor only after the relevant tests are green.
Avoid
- Writing implementation code before a failing test exists.
- Testing mocks instead of the behavior users or callers receive.
- Adding test-only methods to production classes.
Frequently Asked Questions
What workflow does this skill enforce?
It enforces red, green, refactor. Write a failing test, make it pass, then clean up safely.
Can it help with bug fixes?
Yes. It asks for a failing regression test before any production fix is added.
Does it run tests automatically?
No. It tells the agent to run the project test command, but execution depends on the workspace and tools.
Does it support Claude Code?
Yes. The report lists support for Claude, Codex, and Claude Code.
What testing styles does it discourage?
It discourages testing mock behavior, incomplete mocks, and production methods that only exist for tests.
When should a user approve exceptions?
A user should approve exceptions for prototypes, generated code, or configuration work before skipping TDD.
Developer Details
Author
ZhanlinCuiLicense
MIT
Skillstore revision
r1
Version notice
The author did not declare a version.
Repository
https://github.com/ZhanlinCui/Ultimate-Agent-Skills-Collection/tree/main/test-driven-developmentRef
88a205c7f635a966e31156313b590d59007c5caa
Maintenance freshness
7/18/2026
Usage
97 downloads · 182 views
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