Arc Skills

io.github.JoshElgarPublished by GitHub account JoshElgarv0.2.0Updated Oct 27, 2026

100 systems and hardware engineering skills for requirements, interfaces, budgets and verification.

VerifiedSTDIODesktop onlyFiles & StorageDeveloper Tools

Overview

AI-generated overview

Local MCP server bundling 100 systems and hardware engineering skills for requirements, interfaces, budgets and verification work.

What you can do
  • Clean, extract and map requirements from spreadsheets and PDFs, and derive or compare parent and child requirements
  • Review requirements against ECSS editions, find conflicts, and build verification matrices or assess test results
  • Review electrical and mechanical interfaces, and build power and mass budgets with margins
  • Review environmental qualification coverage, FMEA omissions, DO-254 assurance evidence and tender compliance matrices
  • Compare specification versions and produce change registers with verification impacts
When to use it
Useful for systems and hardware engineers who want an assistant to work through requirement registers, interface specifications, budgets, verification evidence and standards reviews inside a dedicated local folder.
Requirements
Runs locally over stdio via uvx from the arc-engineering-mcp PyPI package; needs Python 3.11+ and uv. The environment variable ARC_ENGINEERING_WORKSPACE must point to an existing dedicated folder for inputs and outputs. No model API key is required.
Before you install
The server reads and writes files in the configured workspace folder, so point it at a dedicated directory rather than your home directory. Conversation content is still processed by your AI provider, and ChatGPT uploads follow that service's policies. Standards such as ECSS are not bundled and must be supplied as authorized copies. Engineering edits are proposals for review, and your assistant may incur its own charges.

Installation

In SourceWeft

  1. Open Arc Skills in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

🛠️ Systems Engineering Skills

100 free AI skills for systems and hardware engineers.

Review requirements against ECSS. Check electrical and mechanical interfaces. Build power and mass budgets. Review environmental qualification tests, FMEA and verification evidence.

Browse all 100 skills → · Setup · Example prompts

🍽️ Pick a task

What you haveSkillWhat you get
A messy requirements spreadsheetClean and map requirementsA cleaned table, field mapping, import proposal and issues
A customer specification PDFExtract customer requirementsA requirement register with IDs, page references and open questions
A requirement + the applicable ECSS editionReview a requirement against ECSSFindings tied to inspected criteria, with proposed corrections
A parent requirementDerive sub-requirementsProposed children, derivation rationale and unresolved decisions
Parent and child requirementsCompare children to parentsGaps, unsupported additions and a coverage table
A requirements specificationFind conflicting requirementsConflicting pairs, shared conditions and proposed resolutions
Requirements awaiting verificationBuild a verification matrixRequirement-to-method mapping and missing acceptance criteria
Test results + acceptance criteriaAssess test resultsEvidence assessment, limitations and unresolved outcomes
A tender + your response evidenceBuild a tender compliance matrixClause-by-clause responses, evidence and exceptions
Two versions of a specificationCompare specification versionsA change register and candidate verification impacts
An electrical interface specificationReview an electrical interfaceMissing or inconsistent voltage, current, signal, grounding and fault parameters
Mechanical interface drawingsReview a mechanical interfaceMating geometry, datum, tolerance, clearance and load checks; unresolved drawing details
Component loads and supply limitsBuild a system power budgetPower demand by operating mode, remaining margin and unresolved loads
Component masses and quantitiesBuild a system mass budgetComponent totals, subsystem rollups, remaining allowance and missing estimates
Environmental requirements and test reportsReview environmental qualification coverageRequired conditions mapped to test evidence, with uncovered conditions identified
An FMEAReview an FMEA for missing failure modesCandidate omissions, failure consequences and questions requiring engineering judgment
Airborne electronic hardware assurance records + applicable objectivesCheck DO-254 assurance evidenceEvidence gaps against supplied, applicable objectives

There are also skills for interfaces, architecture, budgets, safety, reliability, change control and design reviews. See the full menu →

🚀 Get started

Download this repo using Code → Download ZIP. Open the unzipped folder in Codex, or attach the ZIP to a ChatGPT conversation that supports file analysis.

Copy and paste this setup prompt:

text
Set up Arc Skills from:https://github.com/ArcHelps/systems-engineering-skillsUse the repository or ZIP I provided, or fetch the public repository if your tools allow it.Read README.md and docs/SETUP.md, then choose the route this client supports.If you can run local commands, install the locked dependencies, connect the localMCP to Codex using the documented configuration, and check skill discovery.Use a dedicated arc-engineering-work folder for inputs and new outputs.Keep my existing settings and source files intact. Do not publish or upload my files.If you cannot run a local MCP, read the attached catalogue and load only theselected skill and its references for this conversation. Explain any unavailable tools.Show me five relevant skills and run the synthetic requirements example if possible.Say which route actually worked and whether I need to restart or enable anything.
Where you use itWhat works
Codex on your computerLocal MCP with all 100 skills and file tools. Recommended.
ChatGPT webAttached skill instructions + ChatGPT's available file tools. This does not install the MCP.
Claude Desktop / other local MCP clientsThe same local MCP; connection instructions.

Local setup needs Python 3.11+ and uv. No model API key needed.

💬 Try it

Attach a file or place it in your configured work folder, then paste a prompt:

Clean requirements

text
Use Arc Skills to clean and map customer-requirements.xlsx.Preserve every source ID and original statement. Show the field mapping,duplicate IDs, TBDs/TBCs, missing information and unresolved links.Give me a cleaned workbook and an import proposal. Reconcile all row counts.

Review a specification

text
Use Arc Skills to extract and review this requirements PDF.Keep page references, notes, figures and deleted requirements visible.Give me a requirements table and the most consequential issues first:contradictions, broken references, unclear limits and unverifiable statements.Separate confirmed problems from ambiguities. Don't invent missing values.

Review against ECSS

text
Use Arc Skills to review REQ-014 against the ECSS-E-ST-10-06 editionI attached. Cite the inspected criteria, explain each finding and proposethe smallest correction. Preserve the original wording beside the proposal.If you cannot inspect the applicable standard, label the review advisory.

Build a power budget

text
Use Arc Skills to build a system power budget from component-loads.xlsx.Separate standby, nominal and peak demand by operating mode. Preserve units,quantities, duty cycles and source values. Show demand against the suppliedpower limits, conversion losses, missing loads and remaining margin.Don't assume every peak load operates simultaneously or invent missing values.

No file yet?

text
Use Arc Skills to review this requirement:"The unit shall provide an appropriate warning quickly."Explain what is missing and propose clearer wording without inventing a latency.

🔒 Your files

The local MCP processes files in your chosen folder without uploading them to an external server. Your assistant and its AI provider still process the content used in the conversation. ChatGPT uploads follow ChatGPT's policies. Data flow →

The skills and code are free under the MIT license. Your AI assistant may have its own charges. Standards are not bundled; provide authorized copies when needed. Engineering edits are proposals for your review, with source wording preserved.

For contributors

Write a skill · Validation and limits · MCP tools

Source: README.md at commit 279b09e

Tools

0
SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

1
  1. v0.2.0LatestOct 17, 2026

Score

50% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 days25 pts

    Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.

  • Auth declared10 pts

    Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.

  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts