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houdini-hda

houdini-hda is a skill for Claude Code from dcc-mcp/dcc-mcp-houdini. It costs 61 tokens per session (793 once invoked), scanned A, original, MIT.

A Houdini toolkit for working with Houdini Digital Assets, or HDAs: reusable nodes packaged with a public set of controls.

In plain words
What is it for?
Use it to install and run HDA files, create public parameters, save nodes as assets, publish libraries with namespaces and versions, validate contracts, update definitions, and sync instances.
Why use it?
It organizes the full asset lifecycle, from installing and testing an asset to publishing versioned libraries, checking their interfaces, and synchronizing existing instances.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

not rated 12repo +1 today A scan 61 tokens original MIT

Good fit Use it to install and run HDA files, create public parameters, save nodes as assets, publish libraries with namespaces and versions, validate contracts, update definitions, and sync instances.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/dcc-mcp/dcc-mcp-houdini/houdini-hda
View source ↗ dcc-mcp/dcc-mcp-houdini pypi.org
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.

Any agent
npx skills add dcc-mcp/dcc-mcp-houdini --skill houdini-hda
Clone the repo
git clone --depth 1 https://github.com/dcc-mcp/dcc-mcp-houdini

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.

agentmods badge for houdini-hda

README.md
[![agentmods](https://agentmods.dev/badge/skills/dcc-mcp/dcc-mcp-houdini/houdini-hda/github.svg)](https://agentmods.dev/skills/dcc-mcp/dcc-mcp-houdini/houdini-hda)
Your own site
<a href="https://agentmods.dev/skills/dcc-mcp/dcc-mcp-houdini/houdini-hda"><img src="https://agentmods.dev/badge/skills/dcc-mcp/dcc-mcp-houdini/houdini-hda/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 houdini-hda

Your own site · 80×15
<a href="https://agentmods.dev/skills/dcc-mcp/dcc-mcp-houdini/houdini-hda"><img src="https://agentmods.dev/badge/skills/dcc-mcp/dcc-mcp-houdini/houdini-hda.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 61 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 793 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 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 $0.00061 $0.00793
Opus 5 $0.00030 $0.00396
Sonnet 5 $0.00012 $0.00159
Haiku 4.5 $0.00006 $0.00079

Measured 11d ago against content hash 2b6e391f95c2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

houdini-hda 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 11d ago.

The scan reads SKILL.md. This mod also ships 11 executable files (scripts/_hda_common.py, scripts/author_hda_interface.py, scripts/execute_hda.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

src/dcc_mcp_houdini/skills/houdini-hda/SKILL.md · 73 lines

What it actually says

houdini-hda

Typed Houdini Digital Asset operations. execute_hda is the main high-level entry point: it can install an asset file, instantiate a node, set parameters, press button parms, and cook the node.

Reusable asset lifecycle

  1. Build and test the internal node graph.
  2. Use author_hda_interface for a complete callback-free declarative interface, or promote_hda_parameters to clone selected internal parameter tuples.
  3. Use save_node_as_hda for a new asset, then publish_hda_library for an explicitly namespaced/versioned library with metadata and dependencies.
  4. Gate the result with validate_hda_contract.
  5. Use sync_hda_instance to reload a library, match an instance to the current definition, and run its native SyncNodeVersion handler.
  6. Use houdini-hda-automation graph cooking tools when a reusable asset needs pipeline-level verification.

update_hda_definition updates the current definition. publish_hda_library requires an explicit namespace, version, and overwrite policy.

save_node_as_hda refuses an existing target by default. overwrite=true explicitly authorizes Houdini to add or replace definitions in that library in-place. The write is not atomic; use a new versioned path when an interrupted write must leave the previous file intact.

Files

What ships with it

12 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. 11d ago First seen · 73 lines · 61 tokens per session scan A 2b6e391f95c2

Subscribe to this mod's changes

houdini-hda is a skill published in the GitHub repository dcc-mcp/dcc-mcp-houdini (12 stars, last pushed today), licensed MIT. It adds 61 tokens to every session and 793 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.

Creative and mediaai-agentsdcchoudinimcpmodel-context-protocolprocedural-generation
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