blender-python-scripting

A guide to writing Python scripts and extensions for Blender 5.x using its bpy programming interface. It covers custom tools, panels, add-ons, event handlers, and batch processing.

In plain words
What is it for?
Use it to create Blender add-ons, custom operators and panels, automate batches, access scene data, and run handlers or timed tasks.
Why use it?
It helps developers work with Blender’s data and user interface programmatically while handling context and automation details.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/ra100/blender-claude-plugin/blender-python-scripting
Any agent
npx skills add ra100/blender-claude-plugin --skill blender-python-scripting
Clone the repo
git clone --depth 1 https://github.com/ra100/blender-claude-plugin

Made for: Claude Code, Codex.

Per session 61 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,652 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00061 $0.02652
Opus 5 $0.00030 $0.01326
Sonnet 5 $0.00012 $0.00530
Haiku 4.5 $0.00006 $0.00265

Measured 2d ago against content hash a76bfac8451d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

blender-python-scripting 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 2d 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.

skills/blender-python-scripting/SKILL.md · 262 lines

How it starts

The opening of the file, as written. The whole thing — 262 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Blender Python Scripting Expert

Overview

This skill provides expert guidance for Blender 5.x Python scripting: writing custom operators, building UI panels, developing add-ons, managing context, using handlers and timers, working with the property system, batch processing, and accessing Blender's data model. The reference files contain complete templates and the data model hierarchy.

MCP-First Approach

Prefer the official Blender MCP Server (Blender Lab, Blender 5.1+) for executing scripts, inspecting datablocks, mutating scene state directly in a running Blender session. Fall back to emitting Python scripts only when the MCP server is not connected.

Detection: at session start, look for tools whose names match execute_blender_code, get_objects_summary, or search_api_docs — these belong to the official blender-mcp server. If any are present, MCP is available.

Tools used by this skill:

  • execute_blender_code — run bpy Python in the live session (primary action)
  • get_objects_summary, get_object_detail_summary — inspect scene state before mutating
  • get_blendfile_summary_datablocks / _missing_files / _of_linked_libraries / _path_info / _usage_guess — inventory the file
  • search_api_docs, get_python_api_docs, search_manual_docs — confirm correct API/operator names before calling them
  • get_screenshot_of_window_as_image / _as_json, get_screenshot_of_area_as_image — verify visual results
  • jump_to_tab_by_name, jump_to_tab_by_space_type, jump_to_view3d_object_by_name, jump_to_view3d_object_data_by_name — drive the UI to make changes visible
  • render_thumbnail_to_path, render_viewport_to_path — capture quick visual feedback

Workflow: inspect with a get_* / search_* tool → mutate via execute_blender_code → verify with a screenshot or summary tool. Keep code blocks small and idempotent so failures are easy to localize.

Setup: see docs/blender-mcp-setup.md.

Read the full file on GitHub · 262 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 2d ago First seen · 262 lines · 61 tokens per session scan A a76bfac8451d

Subscribe to this mod's changes

blender-python-scripting is a skill published in the GitHub repository ra100/blender-claude-plugin (12 stars, last pushed 4mo ago), licensed MIT. It adds 61 tokens to every session and 2,652 once invoked, about $0.0003 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 2026-08-30.

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