What is pyslang-mcp AGENTS.md?

Project instructions for an MCP server that gives AI systems read-only, compiler-based understanding of Verilog and SystemVerilog hardware projects. It can parse source files, inspect design units and hierarchy, find symbols, and trace connections.

Use them when developing or contributing to the server's parsing, diagnostics, hierarchy, symbol-search, assignment, connectivity, preprocessing, and project-summary features.

They define a limited, documented tool set so the server analyses hardware code without being mistaken for a simulator or electronic-design runtime.

How ariklapid/pyslang-mcp configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to ariklapid/pyslang-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/ariklapid/pyslang-mcp/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/ariklapid/pyslang-mcp

Made for: Codex, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/ariklapid/pyslang-mcp/agents-md/github.svg)](https://agentmods.dev/instructions/ariklapid/pyslang-mcp/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/ariklapid/pyslang-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/ariklapid/pyslang-mcp/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/ariklapid/pyslang-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/ariklapid/pyslang-mcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,439 This file is loaded in full into every session.

When invoked 1,439 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.01439	$0.01439
Opus 5.5	$0.00576	$0.00576
Sonnet 5.5	$0.00288	$0.00288
Haiku 4.5	$0.00144	$0.00144

Measured 2mo ago against content hash 6befb7ddf089, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

pyslang-mcp AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

AGENTS.md · 170 lines

How it starts

The opening of the file, as written. The whole thing — 170 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

This file is the public contributor and agent guidance for pyslang-mcp. Read this first, then read README.md, CONTRIBUTING.md, and REMOTE_DEPLOYMENT.md when the task touches deployment.

Mission

Build a professional, open-source MCP server that gives AI systems compiler-backed, read-only understanding of Verilog and SystemVerilog projects through pyslang.

The product is a semantic analysis MCP, not an EDA runtime. Keep scope tight and technically honest.

Product Scope

The public tool surface is:

pyslang_parse_files
pyslang_parse_filelist
pyslang_get_diagnostics
pyslang_list_design_units
pyslang_describe_design_unit
pyslang_get_hierarchy
pyslang_find_symbol
pyslang_find_member
pyslang_get_assignments
pyslang_trace_connectivity
pyslang_get_instance_connections
pyslang_summarize_diagnostics_by_code
pyslang_dump_syntax_tree_summary
pyslang_preprocess_files
pyslang_get_project_summary

Planned tools are not part of the public tool surface until implemented, tested, and documented.

Current Implementation Plan

Issue #15 Verilog analysis work has a public-safe implementation plan at docs/superpowers/plans/2026-06-11-verilog-mcp-functions.md.

When executing that plan:

follow the plan task-by-task and update checkboxes as work completes
implement pyslang_find_member, pyslang_get_assignments, pyslang_trace_connectivity, pyslang_get_instance_connections, and pyslang_summarize_diagnostics_by_code
do not implement pyslang_parse_generated_cache as part of that plan
do not advertise planned tools as released behavior until the code, tests, docs, and MCP protocol smoke coverage are complete
preserve the read-only, project-root, bounded-output, and cache invariants in this file

Non-goals:

simulation
synthesis
waveform viewing
testbench generation
RTL editing or refactoring through MCP tools
remote code execution
full IDE or language-server parity

Read the full file on GitHub · 170 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 170 lines · 1,439 tokens per session scan A 6befb7ddf089

Subscribe to this mod's changes

pyslang-mcp AGENTS.md is an instructions file published in the GitHub repository ariklapid/pyslang-mcp (22 stars, last pushed 4mo ago), licensed Apache-2.0. It adds 1,439 tokens to every session, about $0.0058 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Hardware and IoT

pyslang-mcp AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
pyslang-mcp AGENTS.mdariklapid/pyslang-mcp	Instructions file	22	4mo ago	Apache-2.0	A	1,439	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

pyslang-mcp: Instructions file for Codex