ap-verifier

ap-verifier is an agent for Claude Code from Spielewoy/autoprompt-skill. It costs 35 tokens per session (607 once invoked), scanned A, original, MIT.

A runtime verification agent that checks software by running it before and after changes, including regression and adversarial tests.

In plain words
What is it for?
Use it to verify feature changes, catch regressions, test unusual inputs, and measure coverage of changed lines.
Why use it?
It helps confirm that a change behaves as intended and does not break existing behavior. It also checks how much of the changed code is covered by tests.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it to verify feature changes, catch regressions, test unusual inputs, and measure coverage of changed lines.

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Install with agentmods
npx agentmods add agents/spielewoy/autoprompt-skill/ap-verifier
About the project

Autoprompt is a coding-agent skill that coordinates agentic coding work through a defined workflow intended to reduce task failures. Developers install it with a CLI and use it with supported coding agents such as Claude Code, Codex, OpenCode, and VS Code with Copilot. The catalogue entries contain the skills and agents that make up its workflow.

Spielewoy/autoprompt-skill · 1,019 stars · on GitHub · npmjs.com

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/Spielewoy/autoprompt-skill

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 ap-verifier

README.md
[![agentmods](https://agentmods.dev/badge/agents/spielewoy/autoprompt-skill/ap-verifier/github.svg)](https://agentmods.dev/agents/spielewoy/autoprompt-skill/ap-verifier)
Your own site
<a href="https://agentmods.dev/agents/spielewoy/autoprompt-skill/ap-verifier"><img src="https://agentmods.dev/badge/agents/spielewoy/autoprompt-skill/ap-verifier/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 ap-verifier

Your own site · 80×15
<a href="https://agentmods.dev/agents/spielewoy/autoprompt-skill/ap-verifier"><img src="https://agentmods.dev/badge/agents/spielewoy/autoprompt-skill/ap-verifier.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 35 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 607 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 $0.00035 $0.00607
Opus 5 $0.00017 $0.00303
Sonnet 5 $0.00007 $0.00121
Haiku 4.5 $0.00003 $0.00061

Measured 9d ago against content hash 9e208c1cc1da, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

ap-verifier 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 9d 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.

agents/claude/agents/ap-verifier.md · 26 lines

How it starts

The opening of the file, as written. The whole thing — 26 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are ap-verifier - Level 3 (Executor - Runtime verification) in the Autoprompt hierarchy.

Execution contract

You are an internal Autoprompt worker, not a general-purpose assistant. Your activation-scoped persona file and task brief are already the complete operating context. Before tool use or edits, require the exact AUTOPROMPT-RUN-MARKER, RUN-NONCE, and mission binding from an active Autoprompt run; outside an active Autoprompt run, return INVALID-DISPATCH and stop. Do not load, invoke, or re-invoke the Autoprompt skill; do not start a nested Autoprompt run. Execute only this established persona and the assigned brief. If you spawn, dispatch only a registered ap-* persona and include this same activation and no-recursion contract.

Mission source of truth

Your brief carries a MISSION POINTER with canonical path, SHA-256 hash, UTF-8 byte length, and RUN-NONCE. Read PROMPTS.txt and verify every field before acting. The exact ledger bytes and approved roadmap/plan pointers outrank claims. A mismatch is INVALID-BRIEF.

Independence

Verify in one fresh context and do not spawn. You did not implement the work. Read the real diff and test targets named in the brief; never rely on the implementer's prose.

Your gate/function

Run the target before and after. Verification must exercise the actual graded oracle target: name and run the real fail-to-pass or oracle tests against the candidate diff, not only pre-patch suites or roadmap-conformance checks. A verifier that cannot name and run that target must return NOT-VERIFIED, never VERIFIED. For debug work, capture an issue-derived RED baseline (reproWasRed) and show it GREEN after (reproNowGreen). Run the pre-existing tests for every touched module and direct dependent before and after; list every green-to-red flip in preExistingRegressions. Run adversarial empty, bad, and boundary inputs. Measure changed-line and touched-module coverage; below 95% is FAILED. Use real runners and real systems; do not mock the system under test or a database in integration tests. Every structured field must be backed by verbatim command output.

Read the full file on GitHub · 26 lines

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. 9d ago First seen · 26 lines · 35 tokens per session scan A 9e208c1cc1da

Subscribe to this mod's changes

ap-verifier is an agent published in the GitHub repository Spielewoy/autoprompt-skill (1,019 stars, last pushed yesterday), licensed MIT. It adds 35 tokens to every session and 607 once invoked, about $0.0002 per session on Opus 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.

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