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.NET Trace Collect · dotnet | DecimalAI

devopsby dotnet

.NET Trace Collect

dotnet/dotnet-trace-collect

Source dotnet/skills ↗License MIT

Guide developers through capturing diagnostic artifacts to diagnose production .NET performance issues.

SkillScore91Maintained

Automatic

Coding pack

Last verified 8/10/2026

What it changes

Passed 20 of 22 test cases with the skill, and 4 of 22 without it.

Without skill18%

With skill91%

Checks it passed that the model alone missed

Declines to review source code for performance anti-patterns.
Recommends dotnet-trace for non-admin trace collection on Windows.
Recommends taking two dumps at different memory sizes during growth.

and 17 more in the full report

16 fixed4 passed either way2 still failing0 broke

Pass-rate lift: +73 pp
Tokens: +204%
Agent turns: 0%
Response time: -32%

Model gemini-3.6-flashMeasured 8/10/2026v120 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/dotnet-dotnet-trace-collect/SKILL.md https://app.decimal.ai/s/dotnet-dotnet-trace-collect/SKILL.md

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

decimalai skills add dotnet-dotnet-trace-collect

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

curl -fsSL --create-dirs -o .claude/skills/dotnet-dotnet-trace-collect/SKILL.md https://app.decimal.ai/s/dotnet-dotnet-trace-collect/SKILL.md

Raw file: /s/dotnet-dotnet-trace-collect/SKILL.md ↗ · machine-readable summary at /s/dotnet-dotnet-trace-collect.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 16 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 16

Prompt

I have uploaded our C# source code for an ASP.NET Core controller that experiences high CPU usage under load. Please review the C# code, identify any performance anti-patterns or inefficient LINQ queries, and provide corrected source code.

What was checked, without and with the skill
Checked	Without skill	With skill
Declines to review source code for performance anti-patterns.	Missed	Passed
Explains that source code review is outside the scope of diagnostic trace collection.	Missed	Passed

case-04 · gemini-3.6-flash · 8/10/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md246 lines6 files

.NET Trace Collect

This skill helps developers diagnose production performance issues by recommending the right diagnostic tools for their environment, guiding data collection, and suggesting analysis approaches. It does not analyze code for anti-patterns or perform the analysis itself.

When to Use

A developer needs to investigate a production performance issue (high CPU, memory leak, slow requests, excessive GC, networking errors, etc.)
Choosing the right diagnostic tool for a specific runtime, OS, or deployment topology
Setting up and running diagnostic tool commands for data collection
Understanding trade-offs between available tools (e.g. PerfView vs dotnet-trace)
Collecting diagnostics from containerized or Kubernetes workloads

When Not to Use

Reviewing source code for performance anti-patterns (use a code review skill instead)
Benchmarking during development (e.g. BenchmarkDotNet setup)
Analyzing collected trace or dump files (this skill recommends tools for analysis, but does not perform it)

Inputs

Input	Required	Description
Symptom	Yes	What the developer is observing (high CPU, memory growth, slow requests, hangs, excessive GC, HTTP 5xx errors, networking timeouts, connection failures, assembly loading failures, etc.)
Runtime	Yes	.NET Framework or modern .NET (and version, especially whether .NET 10+)
OS	Yes	Windows or Linux
Deployment	Yes	Non-container, container, or Kubernetes
Admin privileges	Recommended	Whether the developer has admin/root access on the target machine
Repro characteristics	Recommended	Whether the issue is easy to reproduce or requires a long time to manifest

Workflow

Step 1: Understand the environment

Determine or ask the developer to clarify:

Symptom: What they are observing (high CPU, memory leak, slow requests, hangs, excessive GC, HTTP 5xx errors, networking timeouts, connection failures, assembly loading failures, etc.)
Runtime: .NET Framework or modern .NET? If modern .NET, which version? (Especially whether .NET 10 or later.)
OS: Windows or Linux?
Deployment: Running directly on the host, in a container, or in Kubernetes?
Admin privileges: Do they have admin/root access on the target machine or container?

Track record

Benchmark

20 / 22

test cases passed, vs 4 / 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 — 8/3/2026

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

dotnet / skills

plugins/dotnet-diag/skills/dotnet-trace-collect/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1Bundled 5 files

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

managedcode/profilingUse the free official .NET diagnostics CLI tools for profiling and runtime investigation in .NET repositories. USE FOR: the repo needs performance or runtime profiling for a .NET application; the user asks about slow code, high CPU, GC pressure, allocation growth, exception storms, lock. DO NOT USE FOR: replacing realistic performance tests or load tests with ad-hoc tracing alone; production heap collection when the pause risk has not been. INVOKES: inspect the repository context, edit targeted Close match+27 pp pass-rate lift

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

.NET Trace Collect

When to Use

When Not to Use

Inputs

Workflow

Step 1: Understand the environment

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

Related skills