Blender Character Rigging

Before you start: read this whole install prompt, tell me in a few lines what this skill does and what installing it involves, and wait for my go-ahead before you do anything else. Prerequisites: none for the install itself: no account, no API key, no paid plan or paid service, and nothing to install first. For using the skill afterwards you need Blender 5.2 LTS or newer, installed by you (Blender is free and open source): the skill is written for Blender 5.2, its scripts run inside Blender through its Python API (bpy), and one of them enables Blender's built-in Rigify add-on locally. Do not install Blender, Rigify or anything else during this install. An optional Blender MCP server, mentioned by the companion blender-core skill for live sessions in an open Blender, is not part of this listing, is not required, and is not installed here. Install "blender-character-rigging" for me. It is a character-rigging workflow for Blender 5.2: a SKILL.md guide plus five Python scripts that run inside Blender. It fits and generates a Rigify metarig, skins a mesh with bone-heat weights and an automatic voxel-proxy fallback, applies the weight-painting rules, stress-tests the deformation, builds a clean engine game skeleton, and validates the rig for Unity, Unreal or Roblox R15. Repository: https://github.com/EL4CTEO/blender-skills (the skill is the whole skills/blender-character-rigging/ folder at the pinned commit: SKILL.md and scripts/_bpyx.py, scripts/bind_mesh.py, scripts/rig_check.py, scripts/rigify_build.py, scripts/stress_poses.py) Pinned version: install the code at commit 71d031dab8bc6729504d11a78cbe91945401045f exactly. Do not substitute a newer version. If this commit is unreachable, stop and tell me. 1. Clone https://github.com/EL4CTEO/blender-skills into a temporary folder, check out commit 71d031dab8bc6729504d11a78cbe91945401045f, and copy the skills/blender-character-rigging/ folder from that checkout. Then compare every file in the folder with the fingerprints recorded for this listing on 2026-10-19: [FINGERPRINTS] - SKILL.md: SHA-256 137a8f7aa339b5e785f6a2fe42834ee429788030d37277b256dec520382827a3 - scripts/_bpyx.py: SHA-256 a3339ba8a678469e8ed29510e32a7331e0235202191ca4edb977af4720819b4b - scripts/bind_mesh.py: SHA-256 1da27ab64d659ee624ca4682ecba508b85fc9b3be32726279c74a689520b12b5 - scripts/rig_check.py: SHA-256 af8bff2edf6364a61cb55637e295529f8b98b35ffa2864e78046c101e8d4382a - scripts/rigify_build.py: SHA-256 66c242c512da7b10222feb859e11deb10a3c6273652eceb275357ccd7c8a6efc - scripts/stress_poses.py: SHA-256 71998a915aa95e20c20ab64bd6faff97e2bb95f8a7e7d7a832fa7973567b6bb8 If a file does not match, it changed since the listing was prepared: do not install it yet, tell me what you found and let me decide. 2. Read SKILL.md and all five scripts in full and tell me in plain words: what the skill does when used, which services it connects to, whether it reads or sends any personal information or keys, and anything that seems unusual. Stop on any red flag and tell me before going further. Confirm these points from the files: - The skill folder holds six files only: SKILL.md (6,653 bytes) and five Python scripts under scripts/ (_bpyx.py 4,503 bytes, bind_mesh.py 4,516 bytes, rig_check.py 9,246 bytes, rigify_build.py 7,387 bytes, stress_poses.py 5,318 bytes). The scripts are bpy scripts meant to run inside Blender (headless with blender -b, or imported in a live Blender session), not standalone system programs; _bpyx.py is the shared local helper, an exact synced copy of shared/_bpyx.py in the repository, and every script prints one compact JSON result line. - Nothing is sent anywhere during installation itself; the only download at install time is the skill folder from GitHub at the pinned commit. Neither SKILL.md nor the scripts name an account, an API key, telemetry or a remote service, and none of the five scripts makes a network call, spawns a subprocess, or reads environment variables, credentials or secrets: they only drive Blender's own data and operators on the scene in front of them. - At use time, everything runs locally inside Blender, on the .blend file and the meshes I point you at. The pipeline is: prepare the mesh (scale applied, facing -Y, feet at Z=0, T- or A-pose), add and fit a Rigify metarig and place the joints by hand, generate the control rig (FK/IK, bone collections), skin with bind_mesh.py (heat weights, voxel-proxy transfer when heat fails, cleaned to 4 influences and normalized), stress-test with stress_poses.py (extreme poses on frames 1 to 50), build the game skeleton (root plus DEF bones, DEF- prefix stripped, constrained to the control rig), then validate with rig_check.py against the game, Unity, Unreal or Roblox R15 profile, with optional safe fixes. The only file a script can write is a .blend file, and only when I pass an explicit --save path (the _bpyx.py helper saves with save_as_mainfile); otherwise the work stays in the open Blender scene. - rigify_build.py enables Blender's own built-in Rigify add-on inside Blender (addon_utils.enable) when it is not already enabled; it installs nothing and downloads nothing. Do not install Blender, Rigify, any add-on, any package or any companion skill during this install. - The upstream routes install more than this listing: the repository README routes (the Claude Code plugin, or install/install.sh and install/install.ps1) install the whole set of 22 skills of the repository, and SKILL.md points to companion skills (blender-core for the execution model, blender-asset-qa before rigging, blender-animation and blender-export-pipelines after it, blender-facial-shapekeys for faces and shape keys). None of that is part of this listing and none of it is installed here: this install copies the blender-character-rigging folder only. The guide and its five scripts are usable on their own inside Blender; the companion skills are separate listings I can add later if I want them. - The scope is character rigging only: armatures, Rigify metarigs, skinning and weight painting, corrective notes, deformation stress tests, engine game skeletons (Unity Humanoid, Unreal mannequin retargeting, Roblox R15) and rig validation. Animation, facial shape keys and exporting are covered by the companion skills above, not by this one. 3. When I say "yes, install", install it as a skill: copy the whole blender-character-rigging folder into the agent's skills directory, in a folder named "blender-character-rigging", keeping all six files (SKILL.md and the five scripts under scripts/). Do not use the repository's own installer or plugin route, which would install all 22 skills of the repository instead of this one skill. 4. Verify with no network calls: frontmatter valid, all six files in place and matching the fingerprints above. 5. Report what was installed, where, and what I still need to do myself (for example: install Blender 5.2 LTS or newer myself if I do not have it, provide the character mesh or .blend file myself, and place the metarig joints myself as the guide requires; using the skill is a separate step that only starts when I ask for it, and no rigging, skinning or Blender run is launched during this install). GitHub is optional: if I have a GitHub account or the gh CLI, you may use it; otherwise public access is fine. Never require it unless it's in the prerequisites above. Rules: don't touch anything outside the temp folder and the install target. If anything looks off, stop and ask me.