mcp · Global

Pylon

VS Code MCP server — exposes terminals, diagnostics, debugging & editor actions to AI coding agents over a single HTTP endpoint. Multi-window support via hub/satellite model.

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What's in it

Data offered docs-verified: VS Code diagnostics (TypeScript errors, ESLint warnings) · terminal session listing, output buffers and command execution · symbol outlines, references, rename and hover info · debug state, breakpoints and console output · editor actions (open file, format, organise imports, save all)
Formats docs-verified: MCP over HTTP (POST /mcp)
Access llm-inferred: Local install of a VS Code extension, built from source; no API key; no authentication on the endpoint; MIT licence per catalogue metadata

Useful for

Use cases llm-inferred: Debugging a Python or TypeScript drainage or hydraulic calculation script with agent-driven breakpoints and debug state inspection · Running GIS or model-processing scripts in a VS Code terminal and returning output to the agent · Refactoring data-processing code for a flood or BNG tool using get_references and rename_symbol to check blast radius · Catching type and lint errors in consultancy tooling with get_diagnostics before handover
Audience llm-inferred: software developers building consultancy tooling · GIS analysts scripting in VS Code · hydrologists and drainage engineers who code their own models

Limitations

Constraints llm-inferred: Local only: bound to 127.0.0.1, not reachable from other machines · No authentication: any other local process can run commands through the endpoint · Terminal execution and output buffering require VS Code shell integration; CMD is not supported natively · Not a data source: no geospatial, hydrological or environmental datasets, so the catalogue category 'gis' does not fit · Catalogue tool list omits terminal_run, which the docs list; pylon.* settings are listed as if they were tools · Version 0.5.0 is installed from a locally built .vsix, so maintenance and release cadence are unclear · Requires VS Code to be open with the extension running

Licence: MIT
Authentication: No API key required (repository README, auto-extracted; check upstream requirements)
GitHub stars: 3
Last commit: 29/09/2026
Last successful page check: 14/10/2026
Page health: healthy
Package: npm:@vscode/vsce
Verification: Not independently verified

Auto-extracted, unverified fields: tools, install, auth. Check upstream documentation.

Provenance & evidence

Tools/install/auth auto-extracted from README; quality score heuristic (stars, recency, tool count, licence).

Metadata observed 15/10/2026 · research sweep: github-search