Borrowing it
Nothing to install: this file belongs to grahambrooks/symgraph. 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/grahambrooks/symgraph/main/AGENTS.mdgit clone --depth 1 https://github.com/grahambrooks/symgraphWrote 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/grahambrooks/symgraph/agents-md)<a href="https://agentmods.dev/instructions/grahambrooks/symgraph/agents-md"><img src="https://agentmods.dev/badge/instructions/grahambrooks/symgraph/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/grahambrooks/symgraph/agents-md"><img src="https://agentmods.dev/badge/instructions/grahambrooks/symgraph/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 | $0.01165 | $0.01165 |
| Opus 5.5 | $0.00466 | $0.00466 |
| Sonnet 5.5 | $0.00233 | $0.00233 |
| Haiku 4.5 | $0.00117 | $0.00117 |
Grade A, and why
symgraph 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 1mo 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 — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Development Guide
Quick reference for AI agents working in this Rust MCP server repository.
Quick Commands
Build/Test: make build | make test | make check | make fmt | make lint | make cli-only (lean, no MCP server)
Run: cargo run -- index . | cargo run -- serve | cargo run -- serve --port 8080
Test: cargo test --lib | cargo test module:: | cargo test --test integration_test
Release: make release (date-based version YYYY.M.D) | make release-dry-run (preview)
Maintenance: make update | make outdated | make clean
Project Overview
symgraph: Semantic code intelligence MCP server building knowledge graphs for AI-assisted development.
Core Concepts:
- Node: Code symbol (function, class, method, struct, etc.)
- Edge: Relationship (calls, contains, imports, extends, implements)
- Graph: Stored in SQLite
.symgraph/index.db
Key Features: Fast symbol search, impact analysis, call graph navigation, AI context building
Module Structure:
main.rs: the single binary — command catalog, routing,serve, help/completions/manserver.rs: MCP server startup (stdio/HTTP), behind theserverfeaturelib.rs: Core indexing, file walkingtypes.rs: Node, Edge, Language enumscli/: Command implementations, DB utilitiesdb/: SQLite CRUD, queries, transactionsextraction/: Tree-sitter parsing, symbol detectiongraph/: Traversal algorithms (callers, callees, impact)context/: AI context buildingmcp/: Protocol, tool definitions, handlers
Data Flow: Source Files → Extraction (tree-sitter) → Database (SQLite) → Resolution (link refs) → Graph Queries → MCP Tools
Key Dependencies: rmcp (MCP), tree-sitter (parsing), rusqlite (DB), axum (HTTP), ignore (file walking)
Database: .symgraph/index.db with tables: files, nodes, edges, unresolved_refs
Indexes on: nodes(name), edges(source_id), edges(target_id), files(path)
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.
- 1mo ago Changed · +35 tokens per session 67414c2d89a0
- 1mo ago First seen · 98 lines · 1,130 tokens per session scan A a520b19ff44b
symgraph AGENTS.md is an instructions file published in the GitHub repository grahambrooks/symgraph (16 stars, last pushed 3d ago), licensed MIT. It adds 1,165 tokens to every session, about $0.0047 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.
Other instructions, from other repositories
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).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
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.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.