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TDD-Pytest Skill · aiskillstore | DecimalAI

testingby aiskillstore

TDD-Pytest Skill

aiskillstore/tdd-pytest

Source aiskillstore/marketplace ↗License Not recorded

Python/pytest TDD specialist for test-driven development workflows.

SkillScore83Maintained

Automatic

QA & Test Engineering pack

Last verified 8/21/2026

What it changes

Passed 18 of 22 test cases with the skill, and 16 of 22 without it.

Without skill74%

With skill83%

Checks it passed that the model alone missed

Configures pytest addopts with -v and --tb=short flags.
Sets fail_under to 80 in coverage report configuration.
Uses the mocker fixture parameter in the fixture definition.

and 2 more in the full report

4 fixed15 passed either way2 still failing2 broke

Pass-rate lift: +9 pp
Tokens: +43%
Agent turns: 0%
Response time: -26%

Model gemini-3.6-flashMeasured 8/21/2026v119 of 23 cases passed with skill · 22 comparable

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/aiskillstore-tdd-pytest/SKILL.md https://app.decimal.ai/s/aiskillstore-tdd-pytest/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add aiskillstore-tdd-pytest, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/aiskillstore-tdd-pytest/ and pins it in .decimal/skills.lock

decimalai skills add aiskillstore-tdd-pytest

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/aiskillstore-tdd-pytest/SKILL.md https://app.decimal.ai/s/aiskillstore-tdd-pytest/SKILL.md

Raw file: /s/aiskillstore-tdd-pytest/SKILL.md ↗ · machine-readable summary at /s/aiskillstore-tdd-pytest.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 4

Prompt

We want our test suite coverage check in pyproject.toml to strictly enforce a pass threshold for local and CI checks. What configuration key under coverage report sets this mandatory minimum percentage threshold?

What was checked, without and with the skill
Checked	Without skill	With skill
Sets fail_under to 80 in coverage report configuration.	Missed	Passed

case-17 · gemini-3.6-flash · 8/21/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md193 linessingle file

TDD-Pytest Skill

Activate this skill when the user needs help with:

Writing tests using TDD methodology (Red-Green-Refactor)
Auditing existing pytest test files for quality
Running tests with coverage
Generating test reports to TESTING_REPORT.local.md
Setting up pytest configuration in pyproject.toml

TDD Workflow

Red-Green-Refactor Cycle

RED - Write a failing test first
- Test should fail for the right reason (not import errors)
- Test should be minimal and focused
- Show the failing test output
GREEN - Write minimal code to pass
- Only implement what's needed to pass the test
- No premature optimization
- Show the passing test output
REFACTOR - Improve code while keeping tests green
- Clean up duplication
- Improve naming
- Extract functions/classes if needed
- Run tests after each change

Test Organization

File Structure

project/
  src/
    module.py
  tests/
    conftest.py          # Shared fixtures

Track record

Benchmark

18 / 22

test cases passed, vs 16 / 22 without

Adoption

Users: 3
Times used: 62

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

aiskillstore / marketplace

skills/89jobrien/tdd-pytest/SKILL.md

View on GitHub ↗

Imported 8/3/2026Version v1

More skills from the same source and nearby in the registry, with their headline benchmark lift.

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See it in action

What's inside

TDD-Pytest Skill

TDD Workflow

Red-Green-Refactor Cycle

Test Organization

File Structure

Track record

Benchmark

Adoption

SkillSafety

Source

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