Borrowing it
Nothing to install: this file belongs to rokasklive/opengrok-go-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.
curl -O https://raw.githubusercontent.com/rokasklive/opengrok-go-mcp/main/AGENTS.mdgit clone --depth 1 https://github.com/rokasklive/opengrok-go-mcpWrote 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.
[](https://agentmods.dev/instructions/rokasklive/opengrok-go-mcp/agents-md)<a href="https://agentmods.dev/instructions/rokasklive/opengrok-go-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/rokasklive/opengrok-go-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.
<a href="https://agentmods.dev/instructions/rokasklive/opengrok-go-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/rokasklive/opengrok-go-mcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.01791 | $0.01791 |
| Opus 5 | $0.00896 | $0.00896 |
| Sonnet 5 | $0.00358 | $0.00358 |
| Haiku 4.5 | $0.00179 | $0.00179 |
Grade A, and why
opengrok-go-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 8d 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.
How it starts
The opening of the file, as written. The whole thing — 153 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Guide
Project Purpose
opengrok-go-mcp exposes OpenGrok through MCP so agents can search indexed
code, read source files, follow symbols, and answer with source citations.
Active feature plan: specs/008-grounded-tool-transparency/plan.md — grounded, test-backed tool transparency: honest descriptions (text+ctags not AST; supported/unsupported Lucene syntax via help.jsp ground truth) driven by a machine-enforced claim⇔test registry, de-opaqued validation errors (structured ToolErrorBody + suggestion, not raw oneOf), OPENGROK_MCP_DIAGNOSTICS gating (default off), and removal of schema slimming (no surface hides field docs).
Repository Map
cmd/opengrok-go-mcp/: server entrypoint and startup capability probinginternal/config/: environment, flags, defaults, validationinternal/mcpserver/: MCP tools, schemas, pagination, warnings, memory (seeinternal/mcpserver/README.mdfor file layout)evals/: stdio subprocess eval harness (contract checks + token economy benchmark)internal/opengrok/: OpenGrok API and web/raw-file clientdocs/: limitations, agent usage patterns, design notes.specify/: Spec Kit constitution, templates, scripts, extension hooks
Core MCP Contract Rules
- Treat tool names, input fields, output fields, warnings (
warnings[]codes and legacywarningstring), errors (error_code), pagination, cursor semantics, citations, resources, and environment variables as public contract. - Write tool names, descriptions, schemas, warnings, defaults, and examples for a cold agent seeing the server for the first time.
- Keep behavior consistent across full, compact, and gateway surfaces unless a spec explicitly says otherwise.
- Preserve
citation.urlfor source-backed answers. - New or changed response-size, tool-call, or auto-fetch behavior needs limits, defaults, and warnings.
- For the detailed field-by-field contract (inputs, outputs, errors, warnings,
pagination, citations, truncation, capability gates, compatibility,
experimental fields), see
docs/tool-contracts.md.
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.
- 8d ago First seen · 153 lines · 1,791 tokens per session scan A 7c60c71a0e8d
opengrok-go-mcp AGENTS.md is an instructions file published in the GitHub repository rokasklive/opengrok-go-mcp (7 stars, last pushed 22d ago), licensed Apache-2.0. It adds 1,791 tokens to every session, about $0.0090 per session on Opus 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 2026-08-31.
Other instructions, from other repositories
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AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.