A project check that lists the public functions, types, constants, and classes exported by the vlist package.

Use it when reviewing exports, checking feature configuration types, or spotting internal helpers that were exposed by mistake.

It helps reveal accidental changes to the package's public API before they affect users.

How floor/vlist configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to floor/vlist. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/floor/vlist/main/.claude/skills/api-surface/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/floor/vlist

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/floor/vlist/api-surface/github.svg)](https://agentmods.dev/skills/floor/vlist/api-surface)

Your own site

<a href="https://agentmods.dev/skills/floor/vlist/api-surface"><img src="https://agentmods.dev/badge/skills/floor/vlist/api-surface/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/floor/vlist/api-surface"><img src="https://agentmods.dev/badge/skills/floor/vlist/api-surface.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 18 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 319 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00018	$0.00319
Opus 5.5	$0.00007	$0.00128
Sonnet 5.5	$0.00004	$0.00064
Haiku 4.5	$0.00002	$0.00032

Measured 1mo ago against content hash 434f2165dc4f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

api-surface 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.

.claude/skills/api-surface/SKILL.md · 51 lines

What it actually says

API Surface Check

List all public exports from the vlist package.

Context

Main entry: !cat src/index.ts
Internals entry: !cat src/internals.ts 2>/dev/null || echo "no internals.ts"

Instructions

Parse src/index.ts and src/internals.ts to list every public export.
Categorize exports:
- Functions — factory functions like vlist, withGrid, etc.
- Types — TypeScript type/interface exports
- Constants — exported constant values
- Classes — any exported classes

Output format:

## Public API (src/index.ts)

### Functions
- `vlist(config)` — Builder factory
- `withGrid(config)` — Grid layout feature
...

### Types
- `VList<T>` — Main instance interface
- `BuilderConfig` — Configuration options
...

### Constants
- `OVERSCAN` — Default overscan count (3)
...

## Internals (src/internals.ts)
...

For each feature factory function (with*), note its config type if one exists.
Flag anything that looks like it might be accidentally exported (internal helpers, underscore-prefixed, etc.).

Changes

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 · 51 lines · 18 tokens per session scan A 434f2165dc4f

Subscribe to this mod's changes

api-surface is a skill published in the GitHub repository floor/vlist (18 stars, last pushed 9d ago), licensed MIT. It adds 18 tokens to every session and 319 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-09-01.

Code review TypeScript lightweight performance virtual-list virtual-scroll virtualization

review-implement-phase

Implements triaged review actions, commits focused fixes, and posts Done plus resolves threads. Use when the user wants only the implementation phase of the review-framework workflow.

prisma/orm · 38 tokens

no-bare-casts

Writing as in TypeScript or TSX production code, modifying a file that contains a bare as cast, silencing a type error with a cast, encountering as unknown as, or reviewing a cast site.

prisma/orm · 52 tokens

update-pr

Update the pull request for the current session. Use when the user wants to push new changes to an existing PR.

microsoft/vscode · 26 tokens

code-review

Perform a structured code review of changes, checking for correctness, style, tests, and potential issues.

langchain-ai/deepagents · 23 tokens

performance-lint-rules

Performance review guidance for Oxc linter rule implementations. Use only when reviewing Rust rule code under crates/oxclinter/src/rules/ or when explicitly auditing those rules for performance improvements.

oxc-project/oxc · 45 tokens

adversarial-reviewer

Stress-test a code change for concrete correctness defects, unsafe assumptions, and failure modes. Use when the user explicitly asks for an adversarial review, a deep bug hunt, or to tear a change apart, or to check your own change before submitting it. Do not use for ordinary review, style feedback, or general…

emdash-cms/emdash · 72 tokens

vlist: Skill for Claude Code