build-parallelism SKILL.md skillA
build-parallelism from dotnet/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add dotnet/skills/build-parallelism@git:20261005.b9052fdPins git:20261005.b9052fd in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- dotnet/skills
- Path
plugins/dotnet-msbuild/skills/build-parallelism/SKILL.md- Versions recorded
- 8
- Latest version
- git:20261005.b9052fd, committed Oct 5, 2026
- First version recorded
- Apr 21, 2026
- Size
- 6,128 bytes
- Repository stars
- 5,836
- License
- MIT
Analyze an MSBuild solution, solution filter, or Build.proj that schedules multiple project files. USE FOR: measured idle worker nodes, `-m` that does not scale, a serial ProjectReference critical path, graph builds, or an MSBuild task that builds a Projects list. Requires at least two distinct project files whose scheduling or throughput must be analyzed. DO NOT USE for non-MSBuild build systems.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
## Diagnose a slow parallel build (start here)
Work this checklist in order — it targets the usual root cause (a serial
dependency chain that no number of cores can parallelize):
1. **Check how many worker nodes actually built the solution.** Capture a
binlog with `dotnet build /bl:{}` (PowerShell: `dotnet build '-bl:{}'`) and
inspect the node timeline to see whether more than one node ran. Every
`dotnet` CLI command built on the SDK's MSBuild-forwarding path (`build`,
`msbuild`, `test`, `pack`, `publish`, etc.) enables `/maxcpucount` (multiple
nodes) by default; `-m:1` forces a single node. A direct `MSBuild.exe`
invocation is sequential by default, so pass `-m` explicitly to enable
parallel worker nodes there.
2. **Find the critical path.** From the binlog, read per-project timings and the
node timeline. If total build time ≈ the sum of the projects on one
dependency chain, that chain — not CPU count — is the bottleneck.
3. **Name the chain explicitly**, e.g. `Core → Api → Web → Tests`. A long serial
chain stays serial no matter how large `-m` is, because each project waits on
its predecessor.
…Read the whole file at its exact version.
How to install
mdr add dotnet/skills/build-parallelism@sha256:4e849f7e1ab25832The line at the top of this page pins the label git:20261005.b9052fd, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_rbs6zc5mlv7wtbro)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 8 versions of this file, between Apr 21, 2026 and Oct 5, 2026, about one every 24 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261005.b9052fd latest | 2026-10-05 | b9052fd | 6,128 B | A | view · diff |
| git:20261005.b97f9c5 | 2026-10-05 | b97f9c5 | 5,888 B | A | view · diff |
| git:20260930.ac46442 | 2026-09-30 | ac46442 | 5,784 B | A | view · diff |
| git:20260717.1b99afa | 2026-07-17 | 1b99afa | 5,774 B | A | view · diff |
| git:20260624.67e2a47 | 2026-06-24 | 67e2a47 | 4,651 B | A | view · diff |
| git:20260522.0724ccf | 2026-05-22 | 0724ccf | 4,866 B | A | view · diff |
| git:20260522.1a6e78c | 2026-05-22 | 1a6e78c | 4,856 B | A | view · diff |
| git:20260421.05aeb65 | 2026-04-21 | 05aeb65 | 4,118 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (6128 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
dotnet/skills · 5,836 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_rbs6zc5mlv7wtbro GET https://markdownregistry.com/api/v1/resolve?ref=dotnet/skills/build-parallelism GET https://markdownregistry.com/api/v1/blob/4e849f7e1ab258328c642fcebd12717f250efba4d2bbd403c741a36793049246
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.