gate-check

gate-check is a skill for Claude Code, Codex from fakoli/fakoli-plugins. It costs 110 tokens per session (920 once invoked), scanned C, original, MIT.

A checker that maps changed file paths to the verification commands a repository requires before shipping. A repository is the project folder containing the code and its supporting files.

In plain words
What is it for?
Use it to list or run checks for changed documentation, shell scripts, command-line code, and other paths defined by project rules.
Why use it?
It removes the need to remember which tests or checks apply to each kind of change.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present. Also seen: mentions CLAUDE.md; mentions Codex.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the gate-router plugin — 1 skill, 1 command shipped together

Good fit Use it to list or run checks for changed documentation, shell scripts, command-line code, and other paths defined by project rules.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add fakoli/fakoli-plugins
Claude Code
/plugin install gate-router

Made for: Claude Code, Codex.

Or install gate-router, the plugin that ships this one along with the rest of its 1 skill, 1 command.

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.

agentmods badge for gate-check

README.md
[![agentmods](https://agentmods.dev/badge/skills/fakoli/fakoli-plugins/gate-check/github.svg)](https://agentmods.dev/skills/fakoli/fakoli-plugins/gate-check)
Your own site
<a href="https://agentmods.dev/skills/fakoli/fakoli-plugins/gate-check"><img src="https://agentmods.dev/badge/skills/fakoli/fakoli-plugins/gate-check/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.

agentmods 80×15 button for gate-check

Your own site · 80×15
<a href="https://agentmods.dev/skills/fakoli/fakoli-plugins/gate-check"><img src="https://agentmods.dev/badge/skills/fakoli/fakoli-plugins/gate-check.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 110 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 920 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 1 finding. 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00110 $0.00920
Opus 5.5 $0.00044 $0.00368
Sonnet 5.5 $0.00022 $0.00184
Haiku 4.5 $0.00011 $0.00092

Measured 1mo ago against content hash 0ca4bb4a1eb2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

gate-check scanned grade C with 1 finding 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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

shell, so a changed file named `x;rm -rf ~` is an inert argument), but the
plugins/gate-router/skills/gate-check/SKILL.md · 76 lines

How it starts

The opening of the file, as written. The whole thing — 76 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Resolve PLUGIN_ROOT from the host-provided PLUGIN_ROOT / CLAUDE_PLUGIN_ROOT, or from this loaded skill’s directory (../..). Use that absolute path for the bundled commands; do not assume the current directory is the install root.

Gate Check

Deterministic changed-path → verify-command routing. The rules live in the project, not in anyone's memory: .claude/gate-router.local.md (the marketplace's plugin-settings pattern).

Check the current diff

bash "${PLUGIN_ROOT}/scripts/gate-router.sh" --list       # what's required
bash "${PLUGIN_ROOT}/scripts/gate-router.sh" --run        # run them, stop on failure
bash "${PLUGIN_ROOT}/scripts/gate-router.sh" --list --json
  • Default diff base is origin/main (fall back HEAD); override with --base <ref>. The changed set is committed-vs-base + staged + unstaged + untracked — the full "about to ship" surface.
  • --run executes gates in rule order and stops at the first failure with its exit code — report that failure to the user verbatim, fix, re-run.
  • No config → the script says so and exits 0 (nothing to enforce). Suggest authoring one (below) when the repo clearly has gate-worthy surfaces.

Author or extend the rules file

.claude/gate-router.local.md, rules in the frontmatter, glob => command:

---
rules:
  - docs/** => mkdocs build --strict
  - "**/*.sh" => for file in {files}; do test ! -f "$file" || bash -n "$file" || exit; done
  - bin/src/** => cd bin && uv run pytest -q
  - plugins/** => bash scripts/validate.sh
---
Notes for humans below the fence (ignored by the router).
  • ** crosses directories; a leading **/ also matches paths at the root.
  • {files} passes the matched files to the command as separate arguments (safe for spaces, Unicode, tabs, and newlines). Keep {files} standalone and unquoted; the router adds quoting. Use it for linters; omit it for suite commands that don't take a file list.
  • Duplicate commands from overlapping rules run once. Order = rule order.
  • Derive rules from the repo's own history: CI workflow steps, CLAUDE.md test instructions, and past incident classes (encoding, docs links) are the gate candidates. Keep each gate FAST — these run per-change, not nightly.

Read the full file on GitHub · 76 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

  1. 1mo ago Changed · +2 lines 0ca4bb4a1eb2
  2. 1mo ago First seen · 74 lines · 110 tokens per session scan C 3e92fb26674c

Subscribe to this mod's changes

gate-check is a skill published in the GitHub repository fakoli/fakoli-plugins (4 stars, last pushed 28d ago), licensed MIT. It adds 110 tokens to every session and 920 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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