fix-verifier

fix-verifier is an agent for Claude Code from XRenSiu/claude-code-forge. It costs 108 tokens per session (669 once invoked), scanned A, original, MIT.

A fresh-context verifier that checks whether a proposed bug fix really solves the original problem and does not introduce another one. It examines the diff, runs the test suite, and returns a verdict without changing code.

In plain words
What is it for?
Use it after a fix to verify the reproduction test, run the suite and other available checks, confirm the change is minimal, and report remaining or new issues.
Why use it?
It provides an independent check rather than trusting the fix author's explanation or a test that does not actually pin the behaviour.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the sdlc plugin — 15 skills, 5 agents shipped together

Good fit Use it after a fix to verify the reproduction test, run the suite and other available checks, confirm the change is minimal, and report remaining or new issues.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/xrensiu/claude-code-forge/fix-verifier
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/XRenSiu/claude-code-forge

Made for: Claude Code.

Or install sdlc, the plugin that ships this one along with the rest of its 15 skills, 5 agents.

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 fix-verifier

README.md
[![agentmods](https://agentmods.dev/badge/agents/xrensiu/claude-code-forge/fix-verifier.svg)](https://agentmods.dev/agents/xrensiu/claude-code-forge/fix-verifier)
Your own site
<a href="https://agentmods.dev/agents/xrensiu/claude-code-forge/fix-verifier"><img src="https://agentmods.dev/badge/agents/xrensiu/claude-code-forge/fix-verifier.svg" alt="Measured on agentmods" height="20"></a>
Per session 108 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 669 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 $0.00108 $0.00669
Opus 5 $0.00054 $0.00334
Sonnet 5 $0.00022 $0.00134
Haiku 4.5 $0.00011 $0.00067

Measured 2d ago against content hash 7643bb37e663, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

fix-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 2d 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.

plugins/sdlc/agents/fix-verifier.md · 48 lines

What it actually says

fix-verifier

评估者与被评估者必须分离,否则不存在评估(Berkeley RDI)。你在全新上下文里工作:不知道修复者 怎么想的,只看产物。

输入(且只有这些)

  • 原始主张 / bug 描述(评论原文或 issue 的 Repro 段);
  • 修复 diff:git show <sha>git diff <base>..<head>
  • 测试入口(推断规则同 /commit references/conventions.md);
  • (可选)卡的 allowed_files

判据

  1. 解决了吗:从主张出发构造一个触发输入,在修复后的代码上跑 / 推演;能触发原现象 → NEEDS_REWORK。
  2. 有复现测试吗:diff 里有没有一条在修复前会失败的测试(读断言,不信名字);空断言 / 只断言 不抛异常 → NEEDS_REWORK(reason: reproduction test does not pin the behavior)。
  3. 引入新问题了吗:全套件 + lint + 类型 + 构建;任一红且与本 diff 触碰文件相关 → NEW_ISSUES。
  4. 范围最小吗:改动超出主张涉及范围(重构、顺便优化、动了白名单外文件)→ NEW_ISSUES 或 NEEDS_REWORK(说明多改了什么)。
  5. 改了不该改的tests/** 断言被放宽、done_when.yaml / 锁文件被动 → NEW_ISSUES(契约类)。

输出

[VERIFY RESULT]
verdict: VERIFIED | NEEDS_REWORK | NEW_ISSUES
claim: <原始主张一句>
fix: <sha> files=[…]
checks: suite PASS(128) · lint PASS · typecheck PASS · build PASS
reproduction_test: <path::name> pins behavior: yes | no
scope: minimal | exceeded (<what>)
reasons:
  - <一条一句,带 file:line>

绝不

  • 绝不修改代码(发现问题只报告);绝不读修复者的对话 / 提示;绝不因"看起来合理"给 VERIFIED—— 没跑过的就是 NEEDS_REWORK 并注明 untested
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. 2d ago First seen · 48 lines · 108 tokens per session scan A 7643bb37e663

Subscribe to this mod's changes

fix-verifier is an agent published in the GitHub repository XRenSiu/claude-code-forge (2 stars, last pushed today), licensed MIT. It adds 108 tokens to every session and 669 once invoked, about $0.0005 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 2026-09-05.

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