Agent skill

Thread Insert

Create properly sized holes for heat-set threaded inserts (common in 3D printed parts).

LGPL-2.1Auto-check passed

Install Thread Insert

skills CLI

$ npx skills add ghbalf/freecad-ai --skill thread-insert -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install ghbalf/freecad-ai thread-insert --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/ghbalf/freecad-ai.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/thread-insert .claude/skills/thread-insert && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "thread-insert" agent skill from https://github.com/ghbalf/freecad-ai/tree/master/skills/thread-insert into .claude/skills/thread-insert/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "thread-insert", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/ghbalf/freecad-ai/tree/master/skills/thread-insert

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add ghbalf/freecad-ai --skill thread-insert -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install ghbalf/freecad-ai thread-insert --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/ghbalf/freecad-ai.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/thread-insert .agents/skills/thread-insert && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "thread-insert" agent skill from https://github.com/ghbalf/freecad-ai/tree/master/skills/thread-insert into .agents/skills/thread-insert/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "thread-insert", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add ghbalf/freecad-ai --skill thread-insert -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install ghbalf/freecad-ai thread-insert --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/ghbalf/freecad-ai.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/thread-insert .cursor/skills/thread-insert && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "thread-insert" agent skill from https://github.com/ghbalf/freecad-ai/tree/master/skills/thread-insert into .cursor/skills/thread-insert/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "thread-insert", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/ghbalf/freecad-ai.git --path skills/thread-insert

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add ghbalf/freecad-ai --skill thread-insert -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install ghbalf/freecad-ai thread-insert --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/ghbalf/freecad-ai.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/thread-insert .gemini/skills/thread-insert && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "thread-insert" agent skill from https://github.com/ghbalf/freecad-ai/tree/master/skills/thread-insert into .gemini/skills/thread-insert/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "thread-insert", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install ghbalf/freecad-ai thread-insert

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add ghbalf/freecad-ai --skill thread-insert -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/ghbalf/freecad-ai.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/thread-insert .github/skills/thread-insert && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "thread-insert" agent skill from https://github.com/ghbalf/freecad-ai/tree/master/skills/thread-insert into .github/skills/thread-insert/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "thread-insert", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add ghbalf/freecad-ai --skill thread-insert -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install ghbalf/freecad-ai thread-insert --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/ghbalf/freecad-ai.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/thread-insert .opencode/skills/thread-insert && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "thread-insert" agent skill from https://github.com/ghbalf/freecad-ai/tree/master/skills/thread-insert into .opencode/skills/thread-insert/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "thread-insert", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: thread-insert
GitHub stars: 548
Token cost: ~339 tokens
SKILL.md length: 152 words
Files: 1
Skills in repo: 9
Repo updated: Oct 3, 2026
First seen: Oct 7, 2026
Licence: LGPL-2.1

At a glance

Create properly sized holes for heat-set threaded inserts (common in 3D printed parts).

Works in 4 steps: For each position, create a sketch on… → Draw a circle with the insert hole… → Pocket to the insert depth → …
SKILL.md covers Standard insert sizes (hole…, Parameters to ask (if not…, Construction and Clearance hole diameters (for…, plus 1 more section
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Thread Insert is an agent skill from ghbalf/freecad-ai. Create properly sized holes for heat-set threaded inserts (common in 3D printed parts).

Its SKILL.md is about 340 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: AI-powered assistant workbench for FreeCAD — generate 3D models from natural language.

Example prompts

“/thread-insert”

Requirements

Python 3

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

For each position, create a sketch on the target face
Draw a circle with the insert hole diameter
Pocket to the insert depth
If through-hole requested: add a second smaller circle (screw clearance) and pocket through-all

What it can do on your machine

Read from SKILL.md and the folder at commit 5ef1e2d. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are python).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Thread Insert loads about 339 tokens when it runs. Until then it costs about 25 tokens; SKILL.md has 152 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~25
When it runs · the whole SKILL.md, loaded when a task matches: ~339

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from ghbalf/freecad-ai at commit 5ef1e2d, republished under its LGPL-2.1 licence (© ghbalf). 152 words, ~339 tokens.

Download SKILL.mdSave it as .claude/skills/thread-insert/SKILL.md (or your agent's skills folder).

name: thread-insert
description: Create properly sized holes for heat-set threaded inserts (common in 3D printed parts).

Heat-Set Thread Insert Holes

Create properly sized holes for heat-set threaded inserts (common in 3D printed parts).

Standard insert sizes (hole diameter / depth)

M2: hole d=3.2mm, depth=3.5mm
M2.5: hole d=3.6mm, depth=4.0mm
M3: hole d=4.0mm, depth=5.0mm
M4: hole d=5.6mm, depth=6.0mm
M5: hole d=6.4mm, depth=7.0mm

Parameters to ask (if not provided)

Insert size: M2 / M2.5 / M3 / M4 / M5
Target object: which body/feature to cut into
Positions: XY coordinates or face + offsets
Through-hole below insert?: if yes, add a smaller through-hole (screw clearance) below the insert pocket

Construction

For each position, create a sketch on the target face
Draw a circle with the insert hole diameter
Pocket to the insert depth
If through-hole requested: add a second smaller circle (screw clearance) and pocket through-all

Clearance hole diameters (for through-holes below insert)

M2: 2.4mm, M2.5: 2.9mm, M3: 3.4mm, M4: 4.5mm, M5: 5.5mm

Cleanup

After construction, hide all sketches for a clean viewport:

python

for obj in App.ActiveDocument.Objects:
    if obj.TypeId == "Sketcher::SketchObject":
        obj.Visibility = False

Files

Just SKILL.md in skills/thread-insert of ghbalf/freecad-ai.

Open the folder on GitHubat commit 5ef1e2d

Compare with similar skills

Thread Insert next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Thread Insert compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Thread Insert this skillghbalf/freecad-ai	548	—	~339	Automated safety check: Pass	LGPL-2.1	4 days ago
Responsive Sizethedaviddias/Front-End-Checklist	74k	—	~805	Automated safety check: Pass	MIT	yesterday
Dom Sizethedaviddias/Front-End-Checklist	74k	—	~390	Automated safety check: Pass	MIT	yesterday
Font Sizethedaviddias/Front-End-Checklist	74k	—	~896	Automated safety check: Pass	MIT	yesterday
Turn This Into A Threadsickn33/agentic-awesome-skills	47k	1 repos	~1.4k	Automated safety check: Pass	MIT	yesterday
Sizingalsk1992/CloddsBot	2.9k	—	~1.4k	Automated safety check: Pass	MIT	5 days ago

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Questions about Thread Insert

What does Thread Insert do?

Create properly sized holes for heat-set threaded inserts (common in 3D printed parts). Thread Insert is an agent skill from ghbalf/freecad-ai. Create properly sized holes for heat-set threaded inserts (common in 3D printed parts).

How do I install Thread Insert in Claude Code?

Run `npx skills add ghbalf/freecad-ai --skill thread-insert -a claude-code`. Or copy the skill folder (skills/thread-insert in ghbalf/freecad-ai) into .claude/skills/thread-insert in your project. Claude Code loads it when a task matches its description.

How do I install Thread Insert in Codex?

Run `npx skills add ghbalf/freecad-ai --skill thread-insert -a codex`. Or copy the skill folder (skills/thread-insert in ghbalf/freecad-ai) into .agents/skills/thread-insert in your project. Codex loads it when a task matches its description.

Can I use Thread Insert in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add ghbalf/freecad-ai --skill thread-insert -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/thread-insert, .gemini/skills/thread-insert, .github/skills/thread-insert and .opencode/skills/thread-insert in your project.

What does Thread Insert need to run?

SKILL.md names no scripts, command-line tools or credentials: Thread Insert is instructions for the agent only. Our summary lists: Python 3.

Does Thread Insert access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Thread Insert safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Thread Insert use?

Thread Insert is published under the LGPL-2.1 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Thread Insert use?

About 339 tokens (SKILL.md is roughly 1.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Thread Insert?

Skills that share tags, products or a category with Thread Insert: Responsive Size (thedaviddias/Front-End-Checklist, 74k stars), Dom Size (thedaviddias/Front-End-Checklist, 74k stars), Font Size (thedaviddias/Front-End-Checklist, 74k stars) and Turn This Into A Thread (sickn33/agentic-awesome-skills, 47k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Thread Insert?

ghbalf (a GitHub user) maintains it in ghbalf/freecad-ai, which has 548 GitHub stars. The repository holds 9 skills in this directory. The repository was last updated on October 3, 2026.

Source: ghbalf/freecad-ai on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Thread Insert

Install Thread Insert

Facts

At a glance

What it does

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Heat-Set Thread Insert Holes

Standard insert sizes (hole diameter / depth)

Parameters to ask (if not provided)

Construction

Clearance hole diameters (for through-holes below insert)

Cleanup

Files

Compare with similar skills

Similar skills

Responsive Size

Dom Size

Font Size

Turn This Into A Thread

Sizing

Market Sizing Analysis

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Questions about Thread Insert