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Skill: backend/backend-test-additions · velcrafting | DecimalAI

testingby velcrafting

Skill: backend/backend-test-additions

velcrafting/backend-test-additions

Source velcrafting/codex-skills ↗License Not recorded

Add or extend backend tests to prove behavior, invariants, and regressions for services/endpoints/jobs.

SkillScore100Maintained

Automatic

QA & Test Engineering pack

Last verified 8/3/2026

What it changes

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

Without skill73%

With skill100%

Checks it passed that the model alone missed

Recommends executing or suggesting personalize-repo.
Lists outcome values strictly as success, partial, or blocked.
Identifies available test layers as the initial evaluation step.

and 3 more in the full report

6 fixed16 passed either way0 still failing0 broke

Pass-rate lift: +27 pp
Tokens: -14%
Agent turns: 0%
Response time: -44%

Model gemini-3.6-flashMeasured 8/3/2026v122 of 22 cases passed with skill

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/velcrafting-backend-test-additions/SKILL.md https://app.decimal.ai/s/velcrafting-backend-test-additions/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add velcrafting-backend-test-additions, 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/velcrafting-backend-test-additions/ and pins it in .decimal/skills.lock

decimalai skills add velcrafting-backend-test-additions

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

curl -fsSL --create-dirs -o .claude/skills/velcrafting-backend-test-additions/SKILL.md https://app.decimal.ai/s/velcrafting-backend-test-additions/SKILL.md

Raw file: /s/velcrafting-backend-test-additions/SKILL.md ↗ · machine-readable summary at /s/velcrafting-backend-test-additions.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 6 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 6

Prompt

While working on `NotificationWorkerTest`, you discover there are no documented npm scripts or Makefile commands to execute the unit suite. What primary configuration file should be consulted to locate or configure repo test execution rules?

What was checked, without and with the skill
Checked	Without skill	With skill
Directs to consult REPO_PROFILE.json when test execution commands are unknown.	Missed	Passed

case-05 · gemini-3.6-flash · 8/3/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md80 linessingle file

Skill: backend/backend-test-additions

Purpose

Add backend tests that prove:

domain invariants
endpoint behavior and error mapping
job behavior (idempotency/retries) where applicable
integration adapter parsing and failure handling

Prefer deterministic, high-signal tests.

Inputs

Target module/endpoint/job
Behavior to validate (acceptance criteria)
Existing test stack and conventions (from repo/profile)
Mocking strategy (fixtures, fakes, contract tests) if present

Outputs

New or updated test files
Supporting fixtures/mocks
Optional helper utilities if consistent with repo norms

Non-goals

Adding a new test framework
Snapshot-only testing unless repo standard
Broad refactors just to “make it testable” (prefer small extraction)

Workflow

Identify test layers available:
- unit tests (domain)
- integration tests (endpoint boundary)
- contract tests (external adapters)

Track record

Benchmark

22 / 22

test cases passed, vs 16 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/1/2026

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

velcrafting / codex-skills

skills/backend/backend-test-additions/SKILL.md

View on GitHub ↗

Imported 8/1/2026Version 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

Skill: backend/backend-test-additions

Purpose

Inputs

Outputs

Non-goals

Workflow

Track record

Benchmark

Adoption

SkillSafety

Source

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