Borrowing it
Nothing to install: this file belongs to costular/Minitask. 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/costular/Minitask/main/.agents/skills/compose-slot-api-pattern/SKILL.mdgit clone --depth 1 https://github.com/costular/MinitaskWrote 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/costular/minitask/compose-slot-api-pattern)<a href="https://agentmods.dev/skills/costular/minitask/compose-slot-api-pattern"><img src="https://agentmods.dev/badge/skills/costular/minitask/compose-slot-api-pattern/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/costular/minitask/compose-slot-api-pattern"><img src="https://agentmods.dev/badge/skills/costular/minitask/compose-slot-api-pattern.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 | $0.00035 | $0.02906 |
| Opus 5.5 | $0.00014 | $0.01162 |
| Sonnet 5.5 | $0.00007 | $0.00581 |
| Haiku 4.5 | $0.00003 | $0.00291 |
Grade A, and why
compose-slot-api-pattern 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 1mo 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.
This is a copy
100% identical to compose-slot-api-pattern — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 199 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Compose: slot API pattern
Core principle
A reusable Compose component's job is to lay things out, not to enumerate what it lays out. The moment you write title: String, subtitle: String?, leadingIcon: ImageVector?, trailingIcon: ImageVector?, trailingText: String?, showSwitch: Boolean, switchValue: Boolean, onSwitchChange: (Boolean) -> Unit?, badge: String?, …, the component has stopped describing a layout and started enumerating call sites — and the next call site will need a parameter the component doesn't have.
The fix is to delegate content to the caller via @Composable lambda parameters. The component contributes structure (where the leading bit, headline, supporting bit, trailing bit go). The caller contributes everything that goes in those slots.
Material 3's ListItem is the canonical example: every visual piece is a slot (headlineContent, supportingContent, leadingContent, trailingContent, overlineContent), not a primitive. That's not over-engineering — it's the design that scales to every list-item shape the design system needs without ever editing ListItem again.
When to use this skill
You're designing or reviewing a Compose component intended for reuse (more than one call site, now or planned), its visual content varies by caller, and any of these is true:
- Its signature has
title: String,icon: ImageVector,actionText: String?, etc. — primitive types describing content. - It has multiple optional-content parameters that vary by call site (
subtitle: String?,leadingIcon: ImageVector?,trailingText: String?). - It has boolean flags whose only purpose is to switch between content shapes (
showChevron: Boolean,showSwitch: Boolean,mode: Mode.Text | Mode.Switch | …). - It accepts a
Stringparameter where one caller would want aTextwith custom style, a second caller aTextwith aBadge, a third caller a row of icons. - It already has one slot (often
trailingorcontent) and the rest of the parameters are still primitives.
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.
- 1mo ago First seen · 199 lines · 35 tokens per session scan A 1190069fd993
compose-slot-api-pattern is a skill published in the GitHub repository costular/Minitask (12 stars, last pushed 6d ago), licensed Apache-2.0. It adds 35 tokens to every session and 2,906 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to compose-slot-api-pattern, differing in 2 lines, and is treated as a copy.
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