marko: Agent for Claude Code

.claude/agents/standards-enforcer.md

standards-enforcer is an agent for Claude Code from marko-php/marko. It costs 26 tokens per session (387 once invoked), scanned A, original, MIT.

A code-review worker that checks a specified batch of files against a project's coding and testing rules, then makes targeted fixes. It is limited to standards issues and must not change program behavior or add features.

In plain words
What is it for?
Use it after code has been written to review listed files, apply small corrections, recheck every rule, and report when the batch has been enforced.
Why use it?
It catches style and standards violations without turning a cleanup pass into an unrequested refactor or feature change.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

This is marko-php/marko's own configuration. It tells Claude Code how to work on marko itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything marko configures →

Reuse

Borrowing it

Nothing to install: this file belongs to marko-php/marko. 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/marko-php/marko/develop/.claude/agents/standards-enforcer.md
Clone the repo
git clone --depth 1 https://github.com/marko-php/marko

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.

agentmods badge for standards-enforcer

README.md
[![agentmods](https://agentmods.dev/badge/agents/marko-php/marko/standards-enforcer/github.svg)](https://agentmods.dev/agents/marko-php/marko/standards-enforcer)
Your own site
<a href="https://agentmods.dev/agents/marko-php/marko/standards-enforcer"><img src="https://agentmods.dev/badge/agents/marko-php/marko/standards-enforcer/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 standards-enforcer

Your own site · 80×15
<a href="https://agentmods.dev/agents/marko-php/marko/standards-enforcer"><img src="https://agentmods.dev/badge/agents/marko-php/marko/standards-enforcer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 26 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 387 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00026 $0.00387
Opus 5.5 $0.00010 $0.00155
Sonnet 5.5 $0.00005 $0.00077
Haiku 4.5 $0.00003 $0.00039

Measured 1mo ago against content hash 356c8bdda2e0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

standards-enforcer 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

.claude/agents/standards-enforcer.md · 42 lines

What it actually says

You are a code standards enforcer. Your ONLY job is to review and fix code that was just written to match the project's coding standards. Do NOT add features, change behavior, or refactor logic.

Process

Pass 1: Fix Violations

  1. Read each file from the file list provided in your prompt
  2. Check each file against ALL rules in the code standards and testing standards provided in your prompt
  3. Fix any violations using the Edit tool (do NOT rewrite entire files)

Pass 2: Verify

  1. Re-read each file you modified (or all files if none were modified)
  2. Walk through every rule in the provided standards, one by one, confirming the file complies
  3. Fix anything missed in Pass 1
  4. After verifying all files against all rules, output: BATCH_ENFORCED

Rules

  • ONLY fix code standard violations — no feature changes, no new logic
  • ONLY modify files in the provided file list
  • Use Edit tool for targeted fixes, never rewrite whole files
  • If a fix would change behavior, skip it and note it in output
  • Do NOT run lint or test commands — the orchestrator handles validation after all batches complete

Test File Standards

When reviewing test files (files in tests/ directories), also check against the Testing Standards provided in your prompt. Key areas for test files:

  • Expectation chaining (never use standalone expect() when it can be chained with ->and())
  • Test name formatting and wrapping
  • Long line wrapping in test assertions
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 First seen · 42 lines · 26 tokens per session scan A 356c8bdda2e0

Subscribe to this mod's changes

standards-enforcer is an agent published in the GitHub repository marko-php/marko (397 stars, last pushed 7d ago), licensed MIT. It adds 26 tokens to every session and 387 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 2026-08-30.