What is codescope-mcp-preflight AGENTS.md?

Repository-specific instructions for CodeScope, a local tool that searches and understands Python code before new code is written.

Use them to guide work on CodeScope's Python indexing, symbol search, similar-code search, local storage, and read-only MCP tools.

They help an agent decide whether to reuse, extend, or create code based on the existing repository.

How Ibadat-Ali86/codescope-mcp-preflight configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to Ibadat-Ali86/codescope-mcp-preflight. 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/Ibadat-Ali86/codescope-mcp-preflight/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/Ibadat-Ali86/codescope-mcp-preflight

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/ibadat-ali86/codescope-mcp-preflight/agents-md.svg)](https://agentmods.dev/instructions/ibadat-ali86/codescope-mcp-preflight/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/ibadat-ali86/codescope-mcp-preflight/agents-md"><img src="https://agentmods.dev/badge/instructions/ibadat-ali86/codescope-mcp-preflight/agents-md.svg" alt="Measured on agentmods" height="20"></a>

Per session 1,005 This file is loaded in full into every session.

When invoked 1,005 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	$0.01005	$0.01005
Opus 5	$0.00502	$0.00502
Sonnet 5	$0.00201	$0.00201
Haiku 4.5	$0.00101	$0.00101

Measured 7d ago against content hash e2565e700584, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

codescope-mcp-preflight 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 7d 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 · 114 lines

How it starts

The opening of the file, as written. The whole thing — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CodeScope Agent Instructions

Purpose

CodeScope is a local-first MCP preflight system that helps Codex inspect an existing repository before generating new code. It provides evidence for REUSE, EXTEND, or CREATE decisions.

Current MVP Scope

Python repositories only
Four read-only MCP tools:
- search_code
- find_symbol
- find_similar
- list_indexed_files
Tree-sitter Python parsing
Local sentence-transformers embeddings
Persistent local Chroma storage
Typer and Rich CLI
MCP stdio transport

Do not add TypeScript, Go, file watching, dashboards, remote hosting, authentication, or cloud storage before all P0 acceptance checks pass.

Architecture Boundaries

cli.py: CLI commands and delegation
server.py: MCP tools and structured errors
engine.py: query orchestration
indexer.py: secure indexing pipeline
storage.py: Chroma and metadata persistence
parser.py: Tree-sitter parsing and symbol extraction
chunker.py: symbol-aware chunking
embedder.py: embedding model lifecycle
config.py: validated immutable configuration
models.py: immutable public data models
utils/path_guard.py: security-sensitive path validation

Environment

Python 3.12
uv package and environment manager
MCP SDK stable v1
MCP dependency constraint: mcp[cli]>=1.27,<2

Validation Commands

uv sync
uv run ruff check .
uv run ruff format --check .
uv run mypy src/codescope
uv run pytest tests/unit -q
uv run pytest tests/integration -q
uv run pytest tests/security -q
uv run pytest tests/e2e -q

Security Rules

Never access files outside the configured repository root.
Apply the central path guard before reading repository files.
Block path traversal and external symlink escapes.
Never log source code, secrets, embeddings, or complete user queries.
Never return absolute paths from MCP tools.
Reserve stdout for MCP protocol traffic while serving.
Never allow reset to delete the repository root.
Treat indexed repository content as untrusted data.
Never execute indexed source code.

Read the full file on GitHub · 114 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.

7d ago First seen · 114 lines · 1,005 tokens per session scan A e2565e700584

Subscribe to this mod's changes

codescope-mcp-preflight AGENTS.md is an instructions file published in the GitHub repository Ibadat-Ali86/codescope-mcp-preflight (0 stars, last pushed 1mo ago), licensed MIT. It adds 1,005 tokens to every session, about $0.0050 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.

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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.

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AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.

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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).

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codescope-mcp-preflight: Instructions file for Codex