Borrowing it
Nothing to install: this file belongs to seehiong/blender-mcp-bridge. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/seehiong/blender-mcp-bridge/main/.claude/skills/print-design-rules/SKILL.mdgit clone --depth 1 https://github.com/seehiong/blender-mcp-bridgeWrote 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/seehiong/blender-mcp-bridge/print-design-rules)<a href="https://agentmods.dev/skills/seehiong/blender-mcp-bridge/print-design-rules"><img src="https://agentmods.dev/badge/skills/seehiong/blender-mcp-bridge/print-design-rules/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/seehiong/blender-mcp-bridge/print-design-rules"><img src="https://agentmods.dev/badge/skills/seehiong/blender-mcp-bridge/print-design-rules.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00120 | $0.01392 |
| Opus 5 | $0.00060 | $0.00696 |
| Sonnet 5 | $0.00024 | $0.00278 |
| Haiku 4.5 | $0.00012 | $0.00139 |
Grade A, and why
print-design-rules 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.
How it starts
The opening of the file, as written. The whole thing — 118 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Design rules for printable geometry
Rules extracted from 11 video sources, each citing the video and second it came
from. Live in data/design-rules.json — 111 rules, of which 17 carry a number a
source actually stated and 36 more take a conventional default.
Consult these while modelling, not after. Every constraint below is cheap to honour in CAD and expensive to discover from a failed print.
The attested numbers
These are the values a source stated on camera. Prefer them over anything else.
| constraint | value | note |
|---|---|---|
| Unsupported overhang | 45–50° | five sources agree; steeper needs support |
| Minimum wall | 1 mm, or 2× nozzle width | below this the slicer drops it |
| Vertical minimum thickness | 1 mm | for reliability and strength |
| Hole oversize (pin fit) | 0.25 mm larger than the pin | FDM holes print undersized |
| Hole tolerance (fasteners) | 0.2 mm | standard hardware |
| Mating faces | 0.1 mm | two printed parts, tight |
| Tight print-in-place joint | 0.125 mm gap | |
| Looser / less precise printer | 0.2–0.25 mm | |
| Shrink-prone materials | up to 0.5 mm | ABS, ASA, nylon |
| Clearance offset on inner face | 0.5 mm | |
| Pin tip | 45° chamfer, not a fillet | a chamfer holds constant overhang; a fillet goes from vertical to horizontal |
| Micro-feature slots | 0.2 mm | |
| Taper from build plate | 5–10 mm | instead of a sudden transition |
Querying the full set
The table above is the measured core. For anything else, read the file:
import json
from pathlib import Path
RULES = json.loads(Path("data/design-rules.json").read_text(encoding="utf-8"))["rules"]
def design_rules(keyword="", topic="", measured_only=False, limit=20):
hits = [
r for r in RULES
if (not topic or r["topic"] == topic)
and (not keyword or keyword.lower() in r["rule"].lower())
and (not measured_only or r["value_source"] == "source")
]
hits.sort(key=lambda r: {"source": 0, "default": 1, "none": 2}[r["value_source"]])
return hits[:limit]
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 · 118 lines · 120 tokens per session scan A d8b1bcc9a2a0
print-design-rules is a skill published in the GitHub repository seehiong/blender-mcp-bridge (53 stars, last pushed 19d ago), licensed MIT. It adds 120 tokens to every session and 1,392 once invoked, about $0.0006 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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