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MTP Hot Reload for Iterative Test Fixing · dotnet | DecimalAI

testingby dotnet

MTP Hot Reload for Iterative Test Fixing

dotnet/mtp-hot-reload

Source dotnet/skills ↗License MIT

Suggests using Microsoft Testing Platform (MTP) hot reload to iterate fixes on failing tests without rebuilding.

SkillScore91Maintained

Automatic

QA & Test Engineering pack

Last verified 9/9/2026

What it changes

Passed 20 of 22 test cases with the skill, and 10 of 22 without it.

Without skill43%

With skill91%

Checks it passed that the model alone missed

Launches the test host using dotnet run instead of dotnet test.
Sets $env:TESTINGPLATFORM_HOTRELOAD_ENABLED = '1' in PowerShell.
Returns a single dotnet run --project Suite.Tests.csproj command.

and 17 more in the full report

12 fixed9 passed either way1 still failing1 broke

Pass-rate lift: +48 pp
Tokens: +53%
Agent turns: 0%
Response time: -41%

Model gemini-3.6-flashMeasured 9/9/2026v321 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/dotnet-mtp-hot-reload/SKILL.md https://app.decimal.ai/s/dotnet-mtp-hot-reload/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add dotnet-mtp-hot-reload, 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/dotnet-mtp-hot-reload/ and pins it in .decimal/skills.lock

decimalai skills add dotnet-mtp-hot-reload

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

curl -fsSL --create-dirs -o .claude/skills/dotnet-mtp-hot-reload/SKILL.md https://app.decimal.ai/s/dotnet-mtp-hot-reload/SKILL.md

Raw file: /s/dotnet-mtp-hot-reload/SKILL.md ↗ · machine-readable summary at /s/dotnet-mtp-hot-reload.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 11 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 11

Prompt

My MTP test project `Suite.Tests.csproj` already has `Microsoft.Testing.Extensions.HotReload` installed and `Properties/launchSettings.json` configured with the hot reload environment variable. Which command do I run to start the live host?

What was checked, without and with the skill
Checked	Without skill	With skill
Returns a single dotnet run --project Suite.Tests.csproj command.	Missed	Passed
Includes exactly one sentence explaining that the command starts the persistent host.	Missed	Passed

case-14 · gemini-3.6-flash · 9/9/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md201 linessingle file

MTP Hot Reload for Iterative Test Fixing

Set up and use a long-lived Microsoft Testing Platform host that applies code edits and automatically reruns tests.

When to Use

User explicitly asks for test hot reload
User wants a host to stay running and automatically rerun after repeated edits
User needs to set up MTP hot reload in their project

When Not to Use

User needs to write new tests from scratch (use general coding assistance)
User needs to diagnose why a test is failing (use diagnostic skills)
User wants Visual Studio Test Explorer hot reload (different feature, built into VS)
User wants one normal run without rebuilding (use run-tests)
User needs CI/CD pipeline configuration

Inputs

Input	Required	Description
Test project path	No	Path to the test project (.csproj). Defaults to current directory.
Failing test name or filter	No	Specific test(s) to iterate on

Response sizing

If setup is already complete and the user asks only which command to use, return one dotnet run --project <path> command and one sentence explaining that it starts the persistent host. Do not repeat package, launch profile, or rude-edit guidance.
If the package is already installed, show only the remaining enable-and-run steps. Do not suggest reinstalling it or add optional persistence/recovery paths unless requested.
For a named test, identify the framework and return one runnable command with that framework's filter syntax. Never substitute MSTest/NUnit --filter for xUnit v3 --filter-method or TUnit --treenode-filter.
A directly launched MTP host is itself the persistent watcher: dotnet run stays alive and the HotReload extension reacts to edits. Do not replace it

Track record

Benchmark

20 / 22

test cases passed, vs 10 / 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 v5 — 9/8/2026

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

dotnet / skills

plugins/dotnet-test/skills/mtp-hot-reload/SKILL.md

View on GitHub ↗

License MITImported 9/8/2026Version v3

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

Ready to supercharge your AI agents?

See it in action

What's inside

MTP Hot Reload for Iterative Test Fixing

When to Use

When Not to Use

Inputs

Response sizing

Track record

Benchmark

Adoption

SkillSafety

Source

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