Trellis Session Insight
mindfold-ai/Trellis
Reach into past AI conversation history through the trellis mem CLI.
The pure computeAvailableSlots function — inputs, outputs, invariants, and debugging guide.
Install Slot Engine
$ npx skills add BuilderIO/agent-native --skill slot-engine -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install BuilderIO/agent-native slot-engine --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/BuilderIO/agent-native.git skills-src && mkdir -p .claude/skills && cp -r skills-src/packages/scheduling/docs/skills/slot-engine .claude/skills/slot-engine && rm -rf skills-srcUse ~/.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/
Install the "slot-engine" agent skill from https://github.com/BuilderIO/agent-native/tree/main/packages/scheduling/docs/skills/slot-engine into .claude/skills/slot-engine/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "slot-engine", 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 install https://github.com/BuilderIO/agent-native/tree/main/packages/scheduling/docs/skills/slot-engineType 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.
$ npx skills add BuilderIO/agent-native --skill slot-engine -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install BuilderIO/agent-native slot-engine --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/BuilderIO/agent-native.git skills-src && mkdir -p .agents/skills && cp -r skills-src/packages/scheduling/docs/skills/slot-engine .agents/skills/slot-engine && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "slot-engine" agent skill from https://github.com/BuilderIO/agent-native/tree/main/packages/scheduling/docs/skills/slot-engine into .agents/skills/slot-engine/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "slot-engine", 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.
$ npx skills add BuilderIO/agent-native --skill slot-engine -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install BuilderIO/agent-native slot-engine --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/BuilderIO/agent-native.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/packages/scheduling/docs/skills/slot-engine .cursor/skills/slot-engine && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "slot-engine" agent skill from https://github.com/BuilderIO/agent-native/tree/main/packages/scheduling/docs/skills/slot-engine into .cursor/skills/slot-engine/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "slot-engine", 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 https://github.com/BuilderIO/agent-native.git --path packages/scheduling/docs/skills/slot-engine--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add BuilderIO/agent-native --skill slot-engine -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install BuilderIO/agent-native slot-engine --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/BuilderIO/agent-native.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/packages/scheduling/docs/skills/slot-engine .gemini/skills/slot-engine && rm -rf skills-srcUse ~/.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/
Install the "slot-engine" agent skill from https://github.com/BuilderIO/agent-native/tree/main/packages/scheduling/docs/skills/slot-engine into .gemini/skills/slot-engine/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "slot-engine", 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.
$ gh skill install BuilderIO/agent-native slot-engineInstalls 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).
$ npx skills add BuilderIO/agent-native --skill slot-engine -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/BuilderIO/agent-native.git skills-src && mkdir -p .github/skills && cp -r skills-src/packages/scheduling/docs/skills/slot-engine .github/skills/slot-engine && rm -rf skills-srcUse ~/.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/
Install the "slot-engine" agent skill from https://github.com/BuilderIO/agent-native/tree/main/packages/scheduling/docs/skills/slot-engine into .github/skills/slot-engine/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "slot-engine", 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.
$ npx skills add BuilderIO/agent-native --skill slot-engine -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install BuilderIO/agent-native slot-engine --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/BuilderIO/agent-native.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/packages/scheduling/docs/skills/slot-engine .opencode/skills/slot-engine && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "slot-engine" agent skill from https://github.com/BuilderIO/agent-native/tree/main/packages/scheduling/docs/skills/slot-engine into .opencode/skills/slot-engine/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "slot-engine", 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
slot-engine- GitHub stars
- 7.1k
- Token cost
- ~502 tokens
- SKILL.md length
- 261 words
- Files
- 1
- Skills in repo
- 102
- Repo updated
- First seen
- Licence
- None found
At a glance
The pure computeAvailableSlots function — inputs, outputs, invariants, and debugging guide.
- Works in 6 steps: No slot falls in the past (now +… → No slot overlaps a busy interval (with… → No slot falls outside the schedule's… → …
- Tasks that involve Debugging
- SKILL.md covers Inputs, Output, Invariants and Debugging
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Slot Engine is an agent skill from BuilderIO/agent-native. The pure computeAvailableSlots function — inputs, outputs, invariants, and debugging guide.
Its SKILL.md is about 500 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Development, covering Debugging. The repository describes itself as: A framework for building agentic apps.
When your agent uses it
- Tasks that involve Debugging
Example prompts
- “/slot-engine”
Workflow steps
6 steps, taken from the first numbered list in SKILL.md.
- No slot falls in the past (now + minimumBookingNotice is the floor).
- No slot overlaps a busy interval (with buffers applied).
- No slot falls outside the schedule's available intervals for that day.
- No slot exceeds a booking limit.
- No slot falls outside the event's period (rolling/range).
- DST-safe: we convert to UTC using the schedule's timezone before doing
What it can do on your machine
Read from SKILL.md and the folder at commit be0d784. 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.
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
Slot Engine loads about 502 tokens when it runs. Until then it costs about 26 tokens; SKILL.md has 261 words of instructions outside code blocks.
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
Without a licence we can't republish the file, so here is its outline and opening line. It has 261 words (~502 tokens).
“import { computeAvailableSlots } from "@agent-native/scheduling/core"”
- name
- slot-engine
Files
Just SKILL.md in packages/scheduling/docs/skills/slot-engine of BuilderIO/agent-native.
Open the folder on GitHubat commit be0d784
Compare with similar skills
Slot Engine 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Slot Engine this skillBuilderIO/agent-native | 7.1k | — | ~502 | Automated safety check: Pass | None | |
| Trellis Session Insightmindfold-ai/Trellis | 15k | 4 repos | ~1.7k | Automated safety check: Pass | AGPL-3.0 | |
| Native Data FetchingCherryHQ/cherry-studio-app | 4k | 6 repos | ~2.9k | Automated safety check: Notes | MIT | |
| Debugging Executionsn8n-io/n8n | 207k | — | ~2.6k | Automated safety check: Pass | Custom licence | |
| Aoti Debugpytorch/pytorch | 104k | 1 repos | ~1.7k | Automated safety check: Pass | Custom licence | |
| Herdr Throwaway Reproductionherdrdev/herdr | 43k | — | ~2.4k | Automated safety check: Pass | Apache-2.0 |
Similar skills
Native Data Fetching
CherryHQ/cherry-studio-app
A skill your agent uses when implementing or debugging ANY network request, API call, or data fetching.
- Official
Debugging Executions
n8n-io/n8n
Debug failed or wrong-output workflow executions using executions tools.
Aoti Debug
pytorch/pytorch
Debug AOTInductor (AOTI) errors and crashes. An agent skill from pytorch/pytorch.
Herdr Throwaway Reproduction
herdrdev/herdr
Runs a disposable, uniquely named Herdr session inside an existing one so runtime, pane, terminal or API bugs can be reproduced without touching the main session.
Systematic Debugging
ultralisp/ultralisp
A skill your agent uses when encountering any bug, test failure, or unexpected behavior, before proposing fixes
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Client Methods
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The four-area checklist every new feature must complete. An agent skill from BuilderIO/agent-native.
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Audit Log
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Durable, access-scoped, append-only record of who changed what app data, when, and whether it was the agent or a human.
Automations
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Related
Categories
Questions about Slot Engine
What does Slot Engine do?
The pure computeAvailableSlots function — inputs, outputs, invariants, and debugging guide. Slot Engine is an agent skill from BuilderIO/agent-native. The pure computeAvailableSlots function — inputs, outputs, invariants, and debugging guide.
When should I use Slot Engine?
Slot Engine fits situations like: tasks that involve Debugging.
How do I install Slot Engine in Claude Code?
Run `npx skills add BuilderIO/agent-native --skill slot-engine -a claude-code`. Or copy the skill folder (packages/scheduling/docs/skills/slot-engine in BuilderIO/agent-native) into .claude/skills/slot-engine in your project. Claude Code loads it when a task matches its description.
How do I install Slot Engine in Codex?
Run `npx skills add BuilderIO/agent-native --skill slot-engine -a codex`. Or copy the skill folder (packages/scheduling/docs/skills/slot-engine in BuilderIO/agent-native) into .agents/skills/slot-engine in your project. Codex loads it when a task matches its description.
Can I use Slot Engine 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 BuilderIO/agent-native --skill slot-engine -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/slot-engine, .gemini/skills/slot-engine, .github/skills/slot-engine and .opencode/skills/slot-engine in your project.
What does Slot Engine need to run?
SKILL.md names no scripts, command-line tools or credentials: Slot Engine is instructions for the agent only.
Does Slot Engine 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 Slot Engine 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 Slot Engine use?
No licence was found for Slot Engine or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Slot Engine use?
About 502 tokens (SKILL.md is roughly 2k 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 Slot Engine?
Skills that share tags, products or a category with Slot Engine: Trellis Session Insight (mindfold-ai/Trellis, 15k stars), Native Data Fetching (CherryHQ/cherry-studio-app, 4k stars), Debugging Executions (n8n-io/n8n, 207k stars) and Aoti Debug (pytorch/pytorch, 104k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Slot Engine?
BuilderIO (a GitHub organization) maintains it in BuilderIO/agent-native, which has 7,103 GitHub stars. The repository holds 102 skills in this directory. The repository was last updated on October 9, 2026.
Source: BuilderIO/agent-native on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.