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.
npx skills add dcc-mcp/dcc-mcp-houdini --skill houdini-constraintsgit clone --depth 1 https://github.com/dcc-mcp/dcc-mcp-houdiniWrote 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.
[](https://agentmods.dev/skills/dcc-mcp/dcc-mcp-houdini/houdini-constraints)<a href="https://agentmods.dev/skills/dcc-mcp/dcc-mcp-houdini/houdini-constraints"><img src="https://agentmods.dev/badge/skills/dcc-mcp/dcc-mcp-houdini/houdini-constraints/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.
<a href="https://agentmods.dev/skills/dcc-mcp/dcc-mcp-houdini/houdini-constraints"><img src="https://agentmods.dev/badge/skills/dcc-mcp/dcc-mcp-houdini/houdini-constraints.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00046 | $0.00513 |
| Opus 5 | $0.00023 | $0.00257 |
| Sonnet 5 | $0.00009 | $0.00103 |
| Haiku 4.5 | $0.00005 | $0.00051 |
Grade A, and why
houdini-constraints 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 12d 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.
What it actually says
houdini-constraints
Typed animation constraint tools for agents. All tools are affinity: main.
Constraints are implemented via OBJ-level blend nodes (the idiomatic Houdini equivalent of Maya-style parent/position/orient constraints) and CHOP-driven channel referencing for finer control.
Tool groups
parent:create_parent_constraint— drive an object's full transform from a single target.blend:create_blend_constraint— blend between multiple target transforms with per-target weights.position:create_position_constraint— constrain only translation channels.orientation:create_orient_constraint— constrain only rotation channels.inspect:list_constraints— list constraint nodes/relationships in the scene.manage:delete_constraint(destructive) — remove a constraint node.
Tracer-bullet flow
create_parent_constraint(driven_path="/obj/geo2", target_path="/obj/geo1")list_constraints(context_path="/obj")→ verify the blend node existscreate_blend_constraint(driven_path="/obj/geo3", target_paths=["/obj/geo1", "/obj/geo2"], weights=[0.3, 0.7])delete_constraint(node_path="/obj/blend_geo2")
Position/orient constraints use CHOP extraction to isolate transform components, giving more granular control than a full parent constraint.
What ships with it
8 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.
- scripts/_constraint_common.py 3.3 KB runs code
- scripts/create_blend_constraint.py 2.4 KB runs code
- scripts/create_orient_constraint.py 3.3 KB runs code
- scripts/create_parent_constraint.py 2.5 KB runs code
- scripts/create_position_constraint.py 3.3 KB runs code
- scripts/delete_constraint.py 2.0 KB runs code
- scripts/list_constraints.py 2.9 KB runs code
- tools.yaml 5.2 KB
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.
- 12d ago First seen · 53 lines · 46 tokens per session scan A 0df4a6e763bd
houdini-constraints is a skill published in the GitHub repository dcc-mcp/dcc-mcp-houdini (12 stars, last pushed yesterday), licensed MIT. It adds 46 tokens to every session and 513 once invoked, about $0.0002 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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