blender-mcp: Instructions file for Codex

AGENTS.md

blender-mcp AGENTS.md is an instructions file for Codex, OpenCode from ageless-h/blender-mcp. It costs 1,827 tokens per session, scanned A, original, MIT.

Repository instructions for Blender MCP, a service that lets an AI assistant control Blender through a network connection. Blender is software for creating 3D models, scenes, and animations.

In plain words
What is it for?
Use them when modifying, testing, or reviewing the Blender MCP server or its Blender add-on.
Why use it?
They show an agent where the server, Blender add-on, tools, security checks, and version compatibility code belong.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions AGENTS.md.

This is ageless-h/blender-mcp's own configuration. It tells Codex and OpenCode how to work on blender-mcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything blender-mcp configures →

Reuse

Borrowing it

Nothing to install: this file belongs to ageless-h/blender-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/ageless-h/blender-mcp/master/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/ageless-h/blender-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.

agentmods badge for blender-mcp AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/ageless-h/blender-mcp/agents-md/github.svg)](https://agentmods.dev/instructions/ageless-h/blender-mcp/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/ageless-h/blender-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/ageless-h/blender-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.

agentmods 80×15 button for blender-mcp AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/ageless-h/blender-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/ageless-h/blender-mcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,827 This file is loaded in full into every session.
When invoked 1,827 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.01827 $0.01827
Opus 5.5 $0.00731 $0.00731
Sonnet 5.5 $0.00365 $0.00365
Haiku 4.5 $0.00183 $0.00183

Measured 2mo ago against content hash c27be9878e11, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

blender-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 · 132 lines

How it starts

The opening of the file, as written. The whole thing — 132 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS

OVERVIEW

Blender MCP — MCP server for AI-assisted Blender automation. Python >=3.11, zero runtime deps. Two-process architecture: MCP server (PyPI ageless-blender-mcp) talks to Blender addon over TCP.

LLM Client ←MCP JSON-RPC→ blender_mcp (server) ←TCP socket→ blender_mcp_addon (Blender)
  • 105 Python files, ~17,500 lines
  • 29 tools, 0 prompts (tools-only server), 37 registered handlers (across 29 files)
  • Blender: 4.2 LTS / 4.5 LTS / 5.0+ / 5.1

STRUCTURE

src/
  blender_mcp/              # MCP server (PyPI) — see src/blender_mcp/AGENTS.md
    mcp_protocol.py         # MCPServer: entry, 29 tools, JSON-RPC dispatch
    schemas/tools.py        # Tool schemas (WHAT/WHEN/NOT + annotations)
    adapters/               # SocketAdapter (TCP) + MockAdapter (testing)
    catalog/                # CapabilityCatalog — version-scoped registration
    security/               # Allowlist, Guardrails, RateLimiter, AuditLogger
    prompts/registry.py     # Empty prompt registry (prompts removed)
    versioning/             # Blender version compat checks
    telemetry.py            # Usage telemetry
  blender_mcp_addon/        # Blender addon (runs inside Blender)
    __init__.py             # bl_info registration
    capabilities/base.py    # 29-tool dispatcher + _push_undo_step()
    handlers/               # See src/blender_mcp_addon/handlers/AGENTS.md
      registry.py           # @HandlerRegistry.register decorator
      types.py              # DataType enum + DATA_TYPE_TO_COLLECTION
      response.py           # _ok(), _error(), not_found_error()
      base.py               # BaseHandler + GenericCollectionHandler (shared CRUD)
      shared.py             # create_mesh_primitive, link_data_to_scene
      data/                 # 30 files — one per bpy data type
      nodes/ animation/ sequencer/ constraints/ physics/ uv/ scene/
      importexport/ info/ operator/ script/
    server/                 # Socket server (op_log, timeouts)
    operators.py preferences.py ui.py
tests/                      # See tests/AGENTS.md
  conftest.py               # src/ on sys.path, MCP_ADAPTER=mock fixture
  addon/ tools/ integration/ mcp/
docs/                       # capabilities/, testing/, clients/, architecture/
scripts/                    # Build/release helpers + CI scripts (check_compatibility, ci_install_blender, ci_run_blender_tests, validate_boundary)
examples/                   # stdio_loop.py

Read the full file on GitHub · 132 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.

  1. 2mo ago First seen · 132 lines · 1,827 tokens per session scan A c27be9878e11

Subscribe to this mod's changes

blender-mcp AGENTS.md is an instructions file published in the GitHub repository ageless-h/blender-mcp (6 stars, last pushed 6mo ago), licensed MIT. It adds 1,827 tokens to every session, about $0.0073 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 2026-08-31.

Related

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).

microsoft/vscode · 9,719 tokens

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.

vercel/next.js · 7,461 tokens

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).

microsoft/vscode · 5,516 tokens

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.

langchain-ai/langchain · 4,680 tokens

deepseek-harness AGENTS.md

AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.

deepseek-ai/deepseek-harness · 4,313 tokens

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).

microsoft/vscode · 3,037 tokens