A collection of JUCE ValueTree and serialization patterns for Tracktion Engine plugins, where JUCE is a C++ framework and Tracktion Engine is an audio-plugin framework.

Working with plugin state, CachedValue properties, ValueTree listeners, and state persistence or restoration.

It provides guidance for keeping plugin settings observable and preserving them when plugin state is saved or restored.

How Conceptual-Machines/magda-core configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to Conceptual-Machines/magda-core. 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/Conceptual-Machines/magda-core/main/.claude/skills/valuetree/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/Conceptual-Machines/magda-core

Made for: Claude Code.

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/skills/conceptual-machines/magda-core/valuetree/github.svg)](https://agentmods.dev/skills/conceptual-machines/magda-core/valuetree)

Your own site

<a href="https://agentmods.dev/skills/conceptual-machines/magda-core/valuetree"><img src="https://agentmods.dev/badge/skills/conceptual-machines/magda-core/valuetree/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/conceptual-machines/magda-core/valuetree"><img src="https://agentmods.dev/badge/skills/conceptual-machines/magda-core/valuetree.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,816 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin unknown 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	$0.00038	$0.02816
Opus 5.5	$0.00015	$0.01126
Sonnet 5.5	$0.00008	$0.00563
Haiku 4.5	$0.00004	$0.00282

Measured 2mo ago against content hash 44d4103773eb, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

valuetree 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.

.claude/skills/valuetree/SKILL.md · 380 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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.

2mo ago First seen · 380 lines · 38 tokens per session scan A 44d4103773eb

Subscribe to this mod's changes

valuetree is a skill published in the GitHub repository Conceptual-Machines/magda-core (254 stars, last pushed yesterday), licensed GPL-3.0. It adds 38 tokens to every session and 2,816 once invoked, about $0.0002 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 2026-08-30.

C and C++Languages ai ai-agents daw dsl dsp music-production

valuetree next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
valuetreeConceptual-Machines/magda-core	Skill	254	yesterday	GPL-3.0	A	38	Claude Code
zoom-meeting-sdk-unrealanthropics/knowledge-work-plugins	Skill	35k	2d ago	Apache-2.0	A	41	Claude Code
doca-argpNVIDIA/skills	Skill	3.9k	yesterday	Apache-2.0	A	277	Claude Code, Codex
cpu-kernelshuggingface/kernels	Skill	783	yesterday	Apache-2.0	A	89	Claude Code
cpp-prormyndharis/antigravity-skills	Skill	1.9k	23d ago	MIT	A	53	Claude Code, Codex
luamakeactboy168/luamake	Skill	211	8d ago	MIT	A	219	Claude Code, Codex
ue-cpp-foundationsquodsoler/unreal-engine-skills	Skill	439	1mo ago	MIT	A	180	Claude Code, Codex

magda-core: Skill for Claude Code