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boundary-verifier

boundary-verifier is an agent for Claude Code from revfactory/harness-engineering-with-cc. It costs 94 tokens per session (569 once invoked), scanned A, original, Apache-2.0.

A review agent for checking whether an application's API and user-interface code agree at their connection points.

In plain words
What is it for?
Use it to compare backend routes with frontend hooks and return PASS, FIX, or REDO when the design or implementation needs attention.
Why use it?
It catches mismatches such as different response formats, field names, file paths, or loading behavior before they cause bugs.

Agent for Claude Code

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

not rated 123repo +3 5mo ago A scan 94 tokens original Apache-2.0

Good fit Use it to compare backend routes with frontend hooks and return PASS, FIX, or REDO when the design or implementation needs attention.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/revfactory/harness-engineering-with-cc/boundary-verifier
View source ↗ revfactory/harness-engineering-with-cc
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/revfactory/harness-engineering-with-cc

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 boundary-verifier

README.md
[![agentmods](https://agentmods.dev/badge/agents/revfactory/harness-engineering-with-cc/boundary-verifier/github.svg)](https://agentmods.dev/agents/revfactory/harness-engineering-with-cc/boundary-verifier)
Your own site
<a href="https://agentmods.dev/agents/revfactory/harness-engineering-with-cc/boundary-verifier"><img src="https://agentmods.dev/badge/agents/revfactory/harness-engineering-with-cc/boundary-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 boundary-verifier

Your own site · 80×15
<a href="https://agentmods.dev/agents/revfactory/harness-engineering-with-cc/boundary-verifier"><img src="https://agentmods.dev/badge/agents/revfactory/harness-engineering-with-cc/boundary-verifier.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 94 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 569 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 $0.00094 $0.00569
Opus 5.5 $0.00038 $0.00228
Sonnet 5.5 $0.00019 $0.00114
Haiku 4.5 $0.00009 $0.00057

Measured 2mo ago against content hash 8237374375e9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

boundary-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 2mo 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.

ex-12-03-team-8-agents/.claude/agents/boundary-verifier.md · 40 lines

What it actually says

역할

  • backend-impl·frontend-impl 양쪽 산출물을 Read·Grep로 정밀 비교.
  • 7 패턴(API 응답 래핑 / 케이스 변환 / 파일경로 ↔ href / 상태 전이 / 훅 매핑 / 동기 vs 비동기 / 옵셔널 필드)을 모두 점검.
  • 판정 3종: PASS (정합) / FIX (단일 에이전트가 해결 가능) / REDO (설계 자체 오류 → api-designer 재호출).
  • 같은 경계면 REDO 2회 도달 시 강제 PASS + [MANUAL_INTERVENTION_REQUIRED] 플래그.

입력

  • app/api/**/route.ts, hooks/**/*.ts, 01_api_design.md, 02_ui_design.md.
  • ex-12-08의 verifyPattern{1..7}.ts 함수 (옵션).

절차

  1. 양쪽 산출물 동기 시점(엔드포인트 완성 직후 / 훅 작성 직후) 진입.
  2. 7 패턴 모두 검사 (Read + Grep).
  3. PASS → 다음 경계면 진행.
  4. FIX → backend-impl 또는 frontend-impl 중 한 명에게 SendMessage({ verdict: "FIX", reason }).
  5. REDO → api-designer에게 SendMessage. 카운터 증가.
  6. 같은 경계면 카운터 == 2 → 강제 PASS + manual_queue.md에 기록 + PM에 [MANUAL_INTERVENTION_REQUIRED].

출력

  • SendMessage payload (verdict, reason).
  • manual_queue.md (REDO 2회 도달 시).
  • 경계면 검증 로그 (PM의 통합 리포트 입력).

에러 핸들링

  • Edit 미보유 (물리적 강제). 직접 수정 절대 금지.
  • PASS/FIX/REDO 외 판정 절대 금지.
  • 자신의 판정에 대한 책임은 verifier가 짊어지되, 수정 책임은 구현자가 진다.
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. 2mo ago First seen · 40 lines · 94 tokens per session scan A 8237374375e9

Subscribe to this mod's changes

boundary-verifier is an agent published in the GitHub repository revfactory/harness-engineering-with-cc (123 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 94 tokens to every session and 569 once invoked, about $0.0004 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.

Code reviewDebugging
Related

boundary-verifier compared with agents from other repositories

boundary-verifier next to 6 agents from other repositories
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boundary-verifierrevfactory/harness-engineering-with-ccAgent1235mo agoApache-2.0A94Claude Code
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review-obsidian-guidelinesuphy/obsidian-reminderAgent6622d agoMITA63Claude Code
predictive-analystsoftspark/ai-toolkitAgent179yesterdayApache-2.0A35Claude Code
fec-ui-checkerbovinphang/frontend-craftAgent22yesterdayMITA89Claude Code
detectivenxtg-ai/forge-pluginAgent7todayMITA473Claude Code