Menu

Individual skill

mpi

0upvotes

Use when writing or debugging MPI programs: sends and receives, collectives, non-blocking requests, communicators, MPI-IO, hybrids with OpenMP, or mpirun launches. Not for threads alone: use openmp.

.devin/skills/mpi/SKILL.md

Read pinned source

Source commit b0e8ce89a19fac880251dc3ea1babfeb4503a4fe

What was checked

Matches the observed repository HEAD
Yes
Scanner rules are current
No
Repository scan complete
No
Skill scan complete
No
Observed behavior
Not checked yet
Last checked
Nov 4, 2026

These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.

Install this skill

Choose an agent in your Stack or copy a command below. Commands fetch the pinned commit and copy only this skill directory. Existing destinations are refused. Copying a command does not install anything.

An install command is unavailable: current rules, complete repository and skill scans, an eligible behavior level and a permitted license are required.

Repository context

Repository stars (not skill ratings)
55
Repository last updated
Sep 28, 2026
License
Apache-2.0

Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.

Files and excerpt

File metadata and permitted, redacted excerpts come from the recorded scan. Source links are pinned to that commit.

Browse files
Read excerpt

# MPI

MPI is the message-passing standard for distributed-memory parallel programs: one process per rank, explicit sends, receives, and collectives over a communicator. The commands below are exercised against Open MPI 5.0.10, the implementation on the grounding host; MPICH and vendor MPIs accept the same API and a different `mpirun` option set.

## Contract

| Field | Bound contract |
|---|---|
| Trigger | The user parallelizes across nodes or sockets, implements a distributed algorithm, combines ranks with OpenMP threads, runs under a scheduler, debugs a hang or a truncation error, or needs parallel file output. |
| Authority | Reversible local: writes only MPI source files, compiled binaries, hostfiles, and output data files in the working directory; rollback is deleting them. Scheduler submissions and remote launches are proposed to the user. No remote mutation. |
| Side effect | Source, binaries, and data files on disk. `mpirun` on the local host starts one process per rank. |
| Done | The program compiles with `mpicc`, runs under `mpirun -np N` with the expected output on every rank, every send has a matching receive, every non-blocking request is completed, and the scaling issue named in the request has a cause and a fix. |

## Inputs
Back to top