Ready to supercharge your AI agents?

Install any skill in seconds. Free to start, no credit card required.

Test Parallelizer · dicklesworthstone | DecimalAI

dicklesworthstone/test-parallelizer

SkillScore95Maintained

Test Parallelizer - Auto-activating skill for Test Automation. Triggers on: test parallelizer, test parallelizer Part of the Test Automation skill category. Use when writing or running tests. Trigger with phrases like "test parallelizer", "test parallelizer", "test".

by dicklesworthstone

Links this skill to your agents and keeps it current with the author’s updates.

Automatic

QA & Test Engineering pack

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

pip install decimalai

2 · Get the skill — writes .claude/skills/dicklesworthstone-test-parallelizer/SKILL.md

decimalai skills pull dicklesworthstone-test-parallelizer --out .claude/skills/

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

curl -fsSL --create-dirs -o .claude/skills/dicklesworthstone-test-parallelizer/SKILL.md https://app.decimal.ai/s/dicklesworthstone-test-parallelizer/SKILL.md

Raw file: /s/dicklesworthstone-test-parallelizer/SKILL.md ↗ · machine-readable summary at /s/dicklesworthstone-test-parallelizer.json ↗

In productionGlobal

how this skill behaves on real traffic · last 30 days

No production data for this skill yet — usage numbers appear here once agents start running it.

Anonymized aggregate across every org using this skill — proof from real production use, not a demo.

Does this skill help? · Benchmark: with vs. withoutsign in to run this on your agents

22 test cases from the publisher’s eval.yaml · each run twice on gemini-3.6-flash — with the skill injected, then without · last run 22d ago

Yes — +9% lift+19% tokens0% turns95% of whole cases pass with skill (21/22)

Test case	Without → With	Effect	Δ tokens	Δ turns
case-12	✗→✓	▲ Improved	6%	0%
case-22	✗→✓	▲ Improved	-55%	0%
case-01	✓→✓	＝ Same ✓	48%	0%
case-02	✓→✓	＝ Same ✓	28%	0%
case-03	✓→✓	＝ Same ✓	15%	0%

Showing 5 of 22 cases

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/10/2026

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

dicklesworthstone / pi_agent_rust

tests/ext_conformance/artifacts/plugins-community/skills/09-test-automation/test-parallelizer/SKILL.md

View on GitHub ↗

License MITImported 8/10/2026Version v1

Skill contents

SKILL.md

Test Parallelizer

Overview

This skill provides automated assistance for test parallelizer tasks within the Test Automation domain.

When to Use

This skill activates automatically when you:

Mention "test parallelizer" in your request
Ask about test parallelizer patterns or best practices
Need help with test automation skills covering unit testing, integration testing, mocking, and test framework configuration.

Instructions

Provides step-by-step guidance for test parallelizer
Follows industry best practices and patterns
Generates production-ready code and configurations
Validates outputs against common standards

Examples

Example: Basic Usage Request: "Help me with test parallelizer" Result: Provides step-by-step guidance and generates appropriate configurations

Prerequisites

Relevant development environment configured
Access to necessary tools and services
Basic understanding of test automation concepts

Output

Generated configurations and code
Best practice recommendations
Validation results

Error Handling

| Error | Cause | Solution | |-------|-------|----------| | Configuration invalid | Missing required fields | Check documentation for required parameters | | Tool not found | Dependency not installed | Install required tools per prerequisites | | Permission denied | Insufficient access | Verify credentials and permissions |

Resources

Official documentation for related tools
Best practices guides
Community examples and tutorials

Related Skills

Part of the Test Automation skill category. Tags: testing, jest, pytest, mocking, tdd

Illustrative Want to see what dicklesworthstone/test-parallelizer would put in front of your model? Preview the rendered body and check its trigger phrases — no LLM call, no signup.

Latest benchmark · publisher runVerified

8/30/2026, 05:57 UTC · 22 cases

Lift

+9%

95% vs 86%

Agent turns

1.0 vs 1.0

Tokens

+19%

1,669.59 vs 1,400.36

fail → pass · 2pass → pass · 19fail → fail · 1

Per-case results (22)

Case	Status	Duration (ms)			Turns			Tokens			Tool calls
Case	Status	Without	With	Δ	Without	With	Δ	Without	With	Δ	Without	With	Δ
case-01 I am writing a Python unit test using pytest for a service that uploads files to AWS S3 using boto3. I want to intercept S3 API calls locally so tests do not hit live AWS infrastructure. What is the recommended fixture or library setup for mocking AWS S3 calls in pytest?	pass→pass	18,793	19,719	+5%	1	1	0%	2,373	3,519	+48%	0	0	—
case-02 In my Jest configuration file `jest.config.js`, I want to enforce strict code coverage rules so that any pull request fails if line coverage falls below 80%. What configuration property should I set?	pass→pass	9,317	8,804	-6%	1	1	0%	791	1,016	+28%	0	0	—
case-03 I want to evaluate the quality of my test suite by introducing intentional bugs into JS code and verifying that tests fail. What tool and command set up mutation testing for JavaScript/TypeScript projects?	pass→pass	15,588	15,303	-2%	1	1	0%	1,925	2,205	+15%	0	0	—
case-04 We are running Pytest in a GitHub Actions workflow with dynamic CPU core allocation. Developers currently hardcode `pytest -n 4` in the CI script, which underutilizes larger runners and crashes smaller ones. What flag tells pytest-xdist to automatically match the worker count to the available CPU cores on the host?	pass→pass	10,371	10,627	+2%	1	1	0%	901	1,187	+32%	0	0	—
case-05 In our Pytest suite, certain integration tests modify shared database tables and fail when run concurrently on different workers. Developers want to isolate these specific tests to always execute sequentially on the same worker process while letting the rest of the suite run in parallel. What marker decorator handles this in pytest-xdist?	pass→pass	10,661	11,369	+7%	1	1	0%	1,083	1,492	+38%	0	0	—
case-06 When running Pytest across multiple parallel worker processes with pytest-xdist, tests collide because they all attempt to connect to a database named `test_db`. Instead of creating fixed static databases, how should each worker dynamically determine its unique database name inside a pytest fixture?	pass→pass	15,926	20,413	+28%	1	1	0%	2,178	3,435	+58%	0	0	—
case-07 Our Jest test suite crashes with Out Of Memory errors on CI containers because Jest defaults to spawning worker threads for every detected CPU core. We want to restrict Jest to use at most 50% of available CPU cores in CI without hardcoding a fixed integer. Which command line flag or configuration option achieves this?	pass→pass	11,002	12,539	+14%	1	1	0%	1,094	1,615	+48%	0	0	—
case-08 A developer is encountering race conditions in Jest tests when run in parallel mode. To debug the exact execution order, they want to disable worker pools entirely and run all test files sequentially in the main process. What flag forces Jest to execute sequentially in a single process?	pass→pass	8,157	8,820	+8%	1	1	0%	528	1,035	+96%	0	0	—
case-09 In Playwright Test (`playwright.config.ts`), by default tests within a single file run sequentially. We have independent unit-style browser tests inside individual spec files that we want Playwright to run concurrently within each file. Which configuration property enables full parallelism inside test files?	pass→pass	8,486	9,717	+15%	1	1	0%	674	1,154	+71%	0	0	—
case-10 When running Playwright tests concurrently across 4 workers, API mock server ports collide if hardcoded to port 8080. How can a Playwright test fixture dynamically compute a distinct port number per parallel worker process?	fail→fail	18,942	19,239	+2%	1	1	0%	2,738	3,058	+12%	0	0	—
case-11 Our team uses Cypress in a multi-container CI setup. We want Cypress to automatically balance test spec files across multiple distinct CI machines running simultaneously. What flag must be passed to `cypress run` alongside the record key?	pass→pass	8,332	8,331	-0%	1	1	0%	564	899	+59%	0	0	—
case-12 When running `go test ./...`, Go defaults to running test packages in parallel using GOMAXPROCS. We want to explicitly restrict the test runner execution to run at most 2 package/test threads concurrently. Which flag passed to `go test` controls this upper bound?	fail→pass	10,696	9,274	-13%	1	1	0%	1,070	1,134	+6%	0	0	—
case-13 In Go, adding `-parallel` to `go test` only runs separate packages in parallel unless individual unit test functions explicitly opt in to parallel execution within the same package. What method call inside a Go test function signals to the runner that the test can be run concurrently?	pass→pass	8,039	9,766	+21%	1	1	0%	577	1,191	+106%	0	0	—
case-14 Standard `cargo test` runs unit tests as threads in a single process, causing issues with global state and environment variable mutations. What drop-in test runner alternative for Rust executes each test in its own dedicated process for enhanced parallel isolation?	pass→pass	12,801	13,317	+4%	1	1	0%	1,378	1,770	+28%	0	0	—
case-15 We have a large Pytest suite where tests within the same module rely on shared class-level setup fixtures. Running with `--dist=load` causes worker switching midway through a module, re-running expensive setup. Which pytest-xdist distribution mode guarantees that all tests in a single class or module run on the same worker?	pass→pass	9,364	15,054	+61%	1	1	0%	1,836	2,274	+24%	0	0	—
case-16 We want to split our Jest test execution across 4 matrix jobs in GitHub Actions without installing custom third-party splitters. What native CLI flag allows Jest to execute only the 2nd partition of a 4-part split suite?	pass→pass	4,282	9,254	+116%	1	1	0%	725	1,061	+46%	0	0	—
case-17 In pytest-xdist, we want to ensure all test functions residing in the same file are grouped together and dispatched to a single worker process. Which `--dist` option explicitly enforces file-level grouping?	pass→pass	4,990	9,011	+81%	1	1	0%	870	988	+14%	0	0	—
case-18 In `vitest.config.ts`, heavy native C++ modules crash when executed inside Node worker threads due to shared memory conflicts. How do we configure Vitest parallel execution to use child processes (forks) instead of worker threads?	pass→pass	14,189	12,937	-9%	1	1	0%	1,659	1,518	-8%	0	0	—
case-19 We have 1000 Playwright end-to-end tests and want to distribute execution across 5 separate CI machines. What command line flag tells Playwright runner process 1 to execute only its assigned 1/5th share of spec files?	pass→pass	7,986	3,671	-54%	1	1	0%	546	973	+78%	0	0	—
case-20 During local development, a developer wants pytest-xdist to continuously run tests in subprocesses, pause when tests pass, and re-run only the failing tests whenever a file is saved. What command line option enables this continuous loop mode?	pass→pass	9,835	4,759	-52%	1	1	0%	871	1,121	+29%	0	0	—
case-21 When running parallel test workers against PostgreSQL, running migrations from scratch for each worker's database is slow. What PostgreSQL database creation syntax allows a worker test setup script to instantly clone a pre-migrated schema database?	pass→pass	8,246	14,807	+80%	1	1	0%	1,438	1,839	+28%	0	0	—
case-22 In a Pytest suite where some test files complete in milliseconds and others take minutes, standard `--dist=load` distribution leaves worker processes idle waiting for long files. Which pytest-xdist scheduling mode dynamically redistributes pending unexecuted tests from busy workers to idle workers?	fail→pass	28,583	15,460	-46%	1	1	0%	4,989	2,247	-55%	0	0	—

These cases were also screened by the skill’s intent / safety pass.See the Trust review ↗Reproduce this benchmark in Colab ↗

How this skill was measured

DecimalAI ran this skill against gemini-3.6-flash twice over the same eval suite — once with the skill loaded and once without — and compared the two runs case by case. 22 cases were attempted. The headline lift of +9 percentage points is the difference between those two pass rates over the 22 comparable cases.

Model measured: gemini-3.6-flash
Graded by: gemini-3.6-flash
Grading method: judged
Verification: verified
Pass rate without the skill: 86.4%
Pass rate with the skill: 95.5%
Cases attempted: 22
Cases counted toward lift: 22
Cases that regressed: 0
Skill version measured: v1
Run completed: 8/30/2026, 05:57 UTC

Measured example — same prompt, with vs. without the skill · from the benchmark run · case case-12

Prompt

When running `go test ./...`, Go defaults to running test packages in parallel using GOMAXPROCS. We want to explicitly restrict the test runner execution to run at most 2 package/test threads concurrently. Which flag passed to `go test` controls this upper bound?

Without the skill loaded, the model failed this case. With it loaded, the same prompt on the same model passed. This is one improved case from the latest verified run; every case, including any that regressed, is in the table above.

Show both answers

SkillScore blends 4 signals1 of 4 complete

BenchmarkPass rate WITH skill on a verified run95

Live evalNeeds ≥10 evaluated traces in 30 days

AI ratingNeeds ≥10 rated traces

AdoptionNeeds ≥10 serves across ≥2 orgs in 30 days

Efficiency · separate axis (at equal correctness)+0% turns+38% tokens

Shown for transparency; not credited unless a verified run shows no correctness regression.

Backed by 1 of 4 signals — each added signal makes the score more robust.

Verified on gemini-3.6-flash · re-tested 22 days ago

Other measured skills in the registry, with their headline benchmark lift.