feat: v0.2.0 content expansion, 4 skills, 2 rules, 1 template, 7 snippets

New skills covering procedural materials and shaders (Principled BSDF
node tree construction, EEVEE Next stabilization, the Layered Textures
roadmap deferral), depsgraph queries for evaluated geometry (the
evaluated_get plus to_mesh plus to_mesh_clear lifetime contract),
drivers and application handlers (driver_namespace escape hatch,
@Persistent decorator, the new exit_pre handler in 5.1), and migration
from legacy bl_info to the Extensions Platform (three concrete steps,
dual-format pattern).

New rules encoding two more common AI anti-patterns:
prefer-temp-override-over-context-copy (the bpy.context.copy() pattern
was deprecated in 4.x and the override semantics removed in 5.x) and
use-foreach-set-for-bulk-data (per-element Python loops over mesh
attributes versus the orders-of-magnitude faster foreach_set buffer
write).

New template: headless-batch-script-template with a complete working
script that opens a .blend, applies a modifier to every mesh via
temp_override, exports to glTF, and returns explicit exit codes for CI
integration.

Snippets covering Principled BSDF setup, driver custom functions via
driver_namespace, app handler registration with @Persistent, shader
node groups with the cross-version interface API, foreach_get bulk
reads into numpy buffers, the canonical version-branching skeleton,
and USD export with evaluation_mode='RENDER'.

Audit pass on existing v0.1.0 content: bumped standards-version
markers from 1.9.1 to 1.9.4 across all 8 skills, all 4 rules,
AGENTS.md, CLAUDE.md, and ROADMAP.md to align with the meta-repo
VERSION. Verified the bpy_extras.anim_utils.action_ensure_channelbag_for_slot
import path against the current Blender 5.1 API reference and removed
the stale "verify before production" caveat in slotted-actions-animation.
No substantive content rewrites needed; existing content is consistent
with the rules in the same repo.

Aggregate counts updated: 12 skills, 6 rules, 2 templates, 17 snippets.

Made-with: Cursor

Author: TMHSDigital

AGENTS.md

@@ -1,4 +1,4 @@
-<!-- standards-version: 1.9.1 -->
+<!-- standards-version: 1.9.4 -->
 
 # AGENTS.md
 
@@ -12,31 +12,34 @@ fallback. There is no MCP server and no `.cursor-plugin/plugin.json`. This is
 content the AI loads when the user asks Blender questions or works on Blender
 add-ons in Cursor or Claude Code.
 
-The content base for v0.1.0:
+The content base as of v0.2.0:
 
-- 8 skills covering scaffolding, operators, panels, properties, mesh and
-  bmesh, headless batch scripts, slotted-actions animation (5.x), and
-  programmatic geometry nodes.
-- 4 rules encoding the most common AI anti-patterns when writing Blender
-  Python.
-- 1 template (`extension-addon-template`) demonstrating the Extensions
-  Platform format with `register_classes_factory` and a `PointerProperty`
-  binding.
-- 10 snippets covering canonical patterns from the research document.
+- 12 skills covering scaffolding, operators, panels, properties, mesh and
+  bmesh, headless batch scripts, slotted-actions animation (5.x), programmatic
+  geometry nodes, procedural materials and shaders, depsgraph and evaluated
+  data, drivers and application handlers, and `bl_info` to Extensions
+  Platform migration.
+- 6 rules encoding the most common AI anti-patterns when writing Blender
+  Python (ops-in-loops, bmesh leaks, legacy `bl_info`-only, prop assignment,
+  deprecated context-copy override, per-element loops over bulk mesh data).
+- 2 templates: `extension-addon-template` for Extensions Platform add-ons,
+  and `headless-batch-script-template` for unattended batch jobs.
+- 17 snippets covering canonical patterns.
 
 ## Repository structure
 
 ```
 Blender-Developer-Tools/
-  skills/<skill-name>/SKILL.md   # 8 skill files
-  rules/<rule-name>.mdc          # 4 rule files
-  templates/<template-name>/     # 1 starter template
-  snippets/<snippet-name>.py     # 10 standalone Python snippets
+  skills/<skill-name>/SKILL.md   # 12 skill files
+  rules/<rule-name>.mdc          # 6 rule files
+  templates/<template-name>/     # 2 starter templates
+  snippets/<snippet-name>.py     # 17 standalone Python snippets
   .github/workflows/             # validate, drift-check, release, label-sync
   .github/dependabot.yml
   AGENTS.md, CLAUDE.md, README.md, ROADMAP.md, CHANGELOG.md
+  CONTRIBUTING.md, SECURITY.md, CODE_OF_CONDUCT.md
   VERSION                        # source of truth for the repo version
-  LICENSE                        # MIT
+  LICENSE                        # CC-BY-NC-ND-4.0
 ```
 
 ## Branching and commit model
@@ -71,7 +74,7 @@ Each skill lives at `skills/<skill-name>/SKILL.md`. Frontmatter is YAML:
 ---
 name: <kebab-case-skill-name>
 description: <one-line, under 200 chars>
-standards-version: 1.9.1
+standards-version: 1.9.4
 ---
 ```
 
@@ -90,7 +93,7 @@ Rules are `.mdc` files in `rules/`. Frontmatter:
 ---
 description: <one-line>
 alwaysApply: true
-standards-version: 1.9.1
+standards-version: 1.9.4
 ---
 ```
 
@@ -100,7 +103,7 @@ way, and a one-paragraph rationale. 30 to 80 lines is the right size.
 ## CI/CD workflows
 
 - `validate.yml` runs file structure checks plus a `validate-counts` job that
-  asserts the README aggregate counts (8 skills, 4 rules, 1 template, 10
+  asserts the README aggregate counts (12 skills, 6 rules, 2 templates, 17
   snippets) match filesystem reality. The counts language in `README.md` is
   load-bearing: the job greps for it.
 - `drift-check.yml` consumes `Developer-Tools-Directory/.github/actions/
@@ -125,4 +128,4 @@ property handling has invalidated a lot of community content.
 
 ## License
 
-MIT. See `LICENSE`.
+CC-BY-NC-ND-4.0. See `LICENSE`.

CLAUDE.md

@@ -1,28 +1,28 @@
-<!-- standards-version: 1.9.1 -->
+<!-- standards-version: 1.9.4 -->
 
 # CLAUDE.md
 
 This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
 
 ## Project Overview
 
-The **Blender Developer Tools** repository is at **v0.1.3**. It packages skills, rules, snippets, and a starter template for Blender Python development with Cursor and Claude Code. Coverage targets **Blender 5.1** (current stable) with **Blender 4.5 LTS** fallback. There is no MCP server in v0.1.3; content is consumed directly by the AI when working in Blender add-on or scripting projects.
+The **Blender Developer Tools** repository is at **v0.1.3**. It packages skills, rules, snippets, and starter templates for Blender Python development with Cursor and Claude Code. Coverage targets **Blender 5.1** (current stable) with **Blender 4.5 LTS** fallback. There is no MCP server; content is consumed directly by the AI when working in Blender add-on or scripting projects.
 
 **Version:** 0.1.3
-**License:** MIT
-**Author:** TMHSDigital
+**License:** CC-BY-NC-ND-4.0
+**Author:** TM Hospitality Strategies
 
 ## Repository Architecture
 
 ```
-skills/<skill-name>/SKILL.md   - AI workflow definitions, 8 total
-rules/<rule-name>.mdc          - Anti-pattern rules, 4 total
-templates/<template-name>/     - Starter projects, 1 total
-snippets/<snippet-name>.py     - Standalone code patterns, 10 total
+skills/<skill-name>/SKILL.md   - AI workflow definitions, 12 total
+rules/<rule-name>.mdc          - Anti-pattern rules, 6 total
+templates/<template-name>/     - Starter projects, 2 total
+snippets/<snippet-name>.py     - Standalone code patterns, 17 total
 VERSION                        - Source of truth for the repo version
 ```
 
-## Skills (8)
+## Skills (12)
 
 | Skill | Purpose |
 | --- | --- |
@@ -34,17 +34,23 @@ VERSION                        - Source of truth for the repo version
 | headless-batch-scripting | `blender --background --python`, temp_override, argparse after `--` |
 | slotted-actions-animation | Blender 5.x Slotted Actions, channelbag, 4.5 LTS fallback bridge |
 | geometry-nodes-python | Programmatic GN tree construction, interface sockets, NODES modifier |
+| procedural-materials-and-shaders | Node tree construction for Principled BSDF, emissive, node groups, EEVEE Next vs Cycles |
+| depsgraph-and-evaluated-data | `evaluated_get` / `to_mesh` / `to_mesh_clear` lifetime contract for exporters and measurement |
+| drivers-and-app-handlers | Driver expressions, `driver_namespace`, application handlers including the new 5.1 `exit_pre` |
+| bl-info-migration | Three-step migration from legacy `bl_info` to Extensions Platform, dual-format pattern |
 
-## Rules (4)
+## Rules (6)
 
 | Rule | Scope | What it flags |
 | --- | --- | --- |
 | prefer-data-over-ops-in-loops | Always on | `bpy.ops.*` calls inside iteration over many objects |
 | always-free-bmesh | `*.py` | `bmesh.new()` without paired `bm.free()` in a `try`/`finally` block |
 | target-extensions-platform-format | Add-on roots | Legacy `bl_info` only add-ons missing `blender_manifest.toml` |
 | type-annotate-props-and-defend-context | `*.py` | `bpy.props` defined as assignments, unguarded `context.active_object` |
+| prefer-temp-override-over-context-copy | `*.py` | `bpy.context.copy()` passed to operators (deprecated 4.x, removed 5.x) |
+| use-foreach-set-for-bulk-data | `*.py` | Python loops over `mesh.vertices` setting bulk attributes one at a time |
 
-## Templates (1)
+## Templates (2)
 
 `templates/extension-addon-template/` is a copy-paste-ready Blender extension demonstrating:
 
@@ -54,9 +60,21 @@ VERSION                        - Source of truth for the repo version
 - A `PointerProperty` bound to `bpy.types.Scene`
 - Symmetric `register()` / `unregister()` with property cleanup before class unregister
 
-## Snippets (10)
+`templates/headless-batch-script-template/` is a working starter for unattended Blender batch jobs:
 
-Small standalone `.py` files at `snippets/<name>.py`, each 5 to 30 lines, covering: canonical object creation and deletion, depsgraph evaluated mesh, bmesh load-edit-free, temp_override context, foreach_set vertex bulk write, register_classes_factory, PointerProperty binding, cross-version property delete, and the `action_ensure_channelbag_for_slot` slotted-actions bridge.
+- `argparse` parsing of args after the `--` separator
+- Iteration over every mesh object via `bpy.data.objects`
+- Modifier application via `bpy.context.temp_override` (not the deprecated context-dict form)
+- glTF export via `bpy.ops.export_scene.gltf`
+- Explicit exit codes for CI integration
+
+## Snippets (17)
+
+Small standalone `.py` files at `snippets/<name>.py`, each 5 to 50 lines.
+
+v0.1.0: canonical object creation and deletion, depsgraph evaluated mesh, bmesh load-edit-free, temp_override context, foreach_set vertex bulk write, register_classes_factory, PointerProperty binding, cross-version property delete, and the `action_ensure_channelbag_for_slot` slotted-actions bridge.
+
+v0.2.0: Principled BSDF material, driver-with-custom-function via `driver_namespace`, application handler registration, shader node group with cross-version `interface` API, `foreach_get` bulk vertex read, version-branch skeleton, and USD export with `evaluation_mode='RENDER'`.
 
 ## Development Workflow
 

README.md

@@ -5,7 +5,7 @@
 </p>
 
 <p align="center">
-  <a href="https://github.com/TMHSDigital/Blender-Developer-Tools/releases"><img src="https://img.shields.io/badge/version-0.1.1-e87d0d?style=flat-square" alt="Version" /></a>
+  <a href="https://github.com/TMHSDigital/Blender-Developer-Tools/releases"><img src="https://img.shields.io/badge/version-0.2.0-e87d0d?style=flat-square" alt="Version" /></a>
   <a href="https://github.com/TMHSDigital/Blender-Developer-Tools/releases"><img src="https://img.shields.io/github/v/release/TMHSDigital/Blender-Developer-Tools?style=flat-square&color=e87d0d&label=release" alt="Release" /></a>
   <a href="LICENSE"><img src="https://img.shields.io/badge/license-CC--BY--NC--ND--4.0-384d54?style=flat-square" alt="License" /></a>
 </p>
@@ -16,23 +16,23 @@
 </p>
 
 <p align="center">
-  <strong>8 skills</strong> &nbsp;&bull;&nbsp; <strong>4 rules</strong> &nbsp;&bull;&nbsp; <strong>1 template</strong> &nbsp;&bull;&nbsp; <strong>10 snippets</strong>
+  <strong>12 skills</strong> &nbsp;&bull;&nbsp; <strong>6 rules</strong> &nbsp;&bull;&nbsp; <strong>2 templates</strong> &nbsp;&bull;&nbsp; <strong>17 snippets</strong>
 </p>
 
 ---
 
 ## Overview
 
-This repository ships **8 skills, 4 rules, 1 template, and 10 snippets** for Blender Python development targeting Blender 5.1 (current stable) with Blender 4.5 LTS fallback support.
+This repository ships **12 skills, 6 rules, 2 templates, and 17 snippets** for Blender Python development targeting Blender 5.1 (current stable) with Blender 4.5 LTS fallback support.
 
 The content is consumed by AI coding agents (Cursor, Claude Code, any MCP-capable client) when working on Blender add-ons, geometry nodes scripts, batch pipelines, or animation tooling. There is no build step. Edit the markdown and Python files directly.
 
 | Layer | Role |
 | --- | --- |
-| **Skills** | Guided workflows: scaffolding, operators, panels, properties, mesh and bmesh, headless batch, slotted actions, geometry nodes |
-| **Rules** | Guardrails for the most common AI mistakes: ops-in-loops, bmesh leaks, legacy `bl_info` only, prop assignments |
-| **Templates** | A working Extensions Platform add-on starter with `register_classes_factory` and a PointerProperty binding |
-| **Snippets** | 10 small standalone Python files demonstrating canonical patterns |
+| **Skills** | Guided workflows: scaffolding, operators, panels, properties, mesh and bmesh, headless batch, slotted actions, geometry nodes, procedural materials, depsgraph queries, drivers and handlers, `bl_info` migration |
+| **Rules** | Guardrails for the most common AI mistakes: ops-in-loops, bmesh leaks, legacy `bl_info` only, prop assignments, deprecated context-copy override, per-element loops over bulk mesh data |
+| **Templates** | A working Extensions Platform add-on starter and a headless batch script starter |
+| **Snippets** | 17 small standalone Python files demonstrating canonical patterns |
 
 ## Supported Blender versions
 
@@ -45,27 +45,31 @@ The content is consumed by AI coding agents (Cursor, Claude Code, any MCP-capabl
 ## How content is organized
 
 ```
-skills/<name>/SKILL.md   - 8 skill files, YAML frontmatter, one canonical pattern each
-rules/<name>.mdc         - 4 rule files, anti-pattern + correction
-templates/<name>/        - 1 template directory (extension-addon-template)
-snippets/<name>.py       - 10 standalone Python snippets, 5 to 30 lines each
+skills/<name>/SKILL.md   - 12 skill files, YAML frontmatter, one canonical pattern each
+rules/<name>.mdc         - 6 rule files, anti-pattern + correction
+templates/<name>/        - 2 template directories (extension-addon-template, headless-batch-script-template)
+snippets/<name>.py       - 17 standalone Python snippets, 5 to 50 lines each
 ```
 
 ## Using rules in Cursor
 
-The `.mdc` files in `rules/` apply automatically when Cursor opens a Blender Python project, scoped by the `globs` in each rule's frontmatter. The four rules are:
+The `.mdc` files in `rules/` apply automatically when Cursor opens a Blender Python project, scoped by the `globs` in each rule's frontmatter. The six rules are:
 
 - `prefer-data-over-ops-in-loops`: flags `bpy.ops.*` calls inside object iteration
 - `always-free-bmesh`: flags `bmesh.new()` without paired `bm.free()` in `try`/`finally`
 - `target-extensions-platform-format`: flags add-ons missing `blender_manifest.toml`
 - `type-annotate-props-and-defend-context`: flags `bpy.props` assignment form and unguarded `context.active_object`
+- `prefer-temp-override-over-context-copy`: flags `bpy.context.copy()` passed to operators (deprecated 4.x, removed 5.x)
+- `use-foreach-set-for-bulk-data`: flags Python loops over `mesh.vertices` setting `co`, normals, or other per-element bulk data
 
 Symlink or clone this repo, then point Cursor at it as a skills/rules source.
 
-## Using the template
+## Using the templates
 
 `templates/extension-addon-template/` is a working Blender extension. Copy the directory, edit `blender_manifest.toml` (id, version, name, maintainer), and install via Edit > Preferences > Get Extensions > Install From Disk. The template registers an Operator, a Panel, and a PropertyGroup, and demonstrates the `register_classes_factory` pattern with symmetric `register()` and `unregister()`.
 
+`templates/headless-batch-script-template/` is a working starter for unattended Blender batch jobs. It opens a `.blend`, optionally adds and applies a modifier to every mesh, and exports to glTF, with explicit exit codes for CI integration. Run with `blender --background <input.blend> --python script.py -- --output ...`.
+
 ## Snippets
 
 Each snippet is a standalone Python file under `snippets/`. They are not loaded as a package. Open one, copy the relevant lines into your script, and adapt the names. Each file's header comment cites the Blender doc URL or research section the pattern came from.
@@ -83,8 +87,8 @@ When community content (Stack Overflow, older add-on source) conflicts with the
 
 ## Roadmap
 
-See [ROADMAP.md](ROADMAP.md). v0.2.0 candidates include procedural materials, depsgraph queries, drivers, a `bl_info` to manifest migration skill, and a headless batch script template.
+See [ROADMAP.md](ROADMAP.md). v0.2.0 shipped procedural materials, depsgraph queries, drivers and app handlers, `bl_info` to manifest migration, two new rules, and the headless batch script template. v0.3.0 candidates include modal operators, USD pipelines, and `mathutils` patterns.
 
 ## License
 
-Copyright (c) 2026 TMHSDigital. Licensed under [MIT](LICENSE).
+Copyright (c) 2026 TM Hospitality Strategies. Licensed under [CC-BY-NC-ND-4.0](LICENSE).