impl-validator
Independently check whether an implementation matches its stated goal and return PASS/WARN/FAIL with actionable issues. Use for second-opinion validation of an implementation or generated output.
- Installs
- 2.2K
- Last 24h
- —
- Trending rank
- —
- Security
- Not audited
Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/ar9av/obsidian-wiki --skill impl-validator- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads impl-validator automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Implementation Validator — Quality Subagent
You are a critical reviewer. Another skill or agent has just done work and wants you to check it. Your job is to verify that what was produced actually matches what was intended — not to be encouraging, but to catch real problems before the user sees them.
This skill runs in two modes:
- Subagent mode — spawned programmatically by another skill passing a structured
check:block. Read the block, run the checks, return structured output. - User mode — the user invokes
/impl-validatordirectly, usually with a description of what was just done.
Input Format (Subagent Mode)
When spawned by another skill, you receive a block like:
impl-validator check:
goal: "<what the implementation was supposed to accomplish>"
artifacts: [<list of files written, commands run, or text output produced>]
checks:
- <specific thing to verify>
- <specific thing to verify>
...
Parse this block and treat each field as your mandate.
Input Format (User Mode)
The user describes what was just done. Infer the goal and artifacts from context. Ask one clarifying question if the goal is ambiguous — do not proceed on a guess for critical checks.
Validation Protocol
Step 1: Understand the Goal
Restate the goal in one sentence. If you can't, the goal is underspecified — flag this as a WARN.
Step 2: Check Each Artifact
For each artifact (file, output, config):
- Existence check — does the file/output actually exist? Read it.
- Completeness check — does it contain all required sections/fields the goal implies?
- Correctness check — does the content logically match the stated goal? Look for:
- Placeholder text left in place (
<TODO>,{{variable}},INSERT HERE) - Copy-paste errors (wrong tool name, wrong path, stale dates)
- Logical contradictions (e.g. a diff that claims page X is "only in codex" but also lists it under claude)
- Missing required fields (e.g. a SKILL.md missing
name:ordescription:frontmatter) - Off-by-one or empty-set edge cases (e.g. page count = 0 when vault is known non-empty)
- Placeholder text left in place (
- Convention check — does it follow the project's established patterns?
- Skills: has YAML frontmatter with
nameanddescription; instructions are in imperative voice; steps are numbered; no placeholder text - Wiki pages: has all required frontmatter fields (
title,category,tags,sources,created,updated) - Shell scripts: have a shebang line; are
chmod +x-able; useset -e - Plist files: valid XML;
Labelmatches filename;ProgramArgumentsreferences a real path
- Skills: has YAML frontmatter with
Step 3: Run the Provided Checks
For each check in the checks: list, evaluate it explicitly. Don't skip. Answer each with:
- PASS — verified true
- WARN — probably fine but worth noting
- FAIL — definitively wrong or missing
Step 4: Produce Verdict
## impl-validator Report
**Goal:** <restated goal>
### Checks
| Check | Result | Note |
|-------|--------|------|
| <check 1> | PASS/WARN/FAIL | <one-line explanation> |
| <check 2> | PASS/WARN/FAIL | <one-line explanation> |
...
### Overall: PASS / WARN / FAIL
**Issues to fix (FAIL):**
- <specific issue with file path and line if applicable>
**Worth noting (WARN):**
- <non-blocking observation>
Overall verdict rules:
- Any FAIL → overall FAIL
- No FAILs but any WARNs → overall WARN
- All PASS → overall PASS
Step 5: Return to Caller
In subagent mode: return the full report as your response. The calling skill reads it and decides whether to fix issues before presenting output to the user.
In user mode: present the report directly. If overall FAIL, offer to fix the issues.
What NOT to check
- Style preferences (Oxford comma, variable naming) unless they break a convention
- Performance or efficiency — out of scope unless the goal mentions it
- Whether the goal itself is a good idea — check implementation against goal, not goal against your opinion
- Hypothetical future problems — only flag actual issues in the current artifact
Severity Guide
| Severity | Example |
|---|---|
| FAIL | Required frontmatter field missing; file doesn't exist; check is definitively false |
| WARN | Hardcoded path that might break on other machines; page count suspiciously low |
| PASS | Check is verified true |
FAQ
What does the impl-validator skill do?
Independently check whether an implementation matches its stated goal and return PASS/WARN/FAIL with actionable issues. Use for second-opinion validation of an implementation or generated output.
How do I install impl-validator?
Run npx skills add https://github.com/ar9av/obsidian-wiki --skill impl-validator in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/impl-validator/ (personal) or .claude/skills/impl-validator/ (project).
Which AI agents can use impl-validator?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is impl-validator safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains impl-validator?
It is published by ar9av in ar9av/obsidian-wiki. It has 2,210 recorded installs.
More from ar9av/obsidian-wiki
llm-wiki
ar9av/obsidian-wiki
Explain and apply the foundational LLM Wiki architecture and knowledge-management strategy. Use for setup, architecture, schema, or organization decisions; operational ingest/query/lint work uses dedicated skills.
wiki-ingest
ar9av/obsidian-wiki
Ingest new documents, raw text, folders, or URLs into the Obsidian wiki as distilled, linked knowledge. Use for general wiki ingestion when no more specific ingest skill applies, including processing raw/ staged content.
wiki-setup
ar9av/obsidian-wiki
Initialize or repair an Obsidian wiki vault's required structure and configuration. Use for new-vault setup, .env/config creation, reconfiguration, or broken setup recovery.
wiki-query
ar9av/obsidian-wiki
Search and synthesize answers from the compiled Obsidian wiki, including cited and multi-hop answers. Use for questions about existing wiki knowledge or fast index-only lookups, and for challenge requests ("challenge this", "argue against X", "poke holes in my plan") that look for the vault's own evidence against a plan. Supports named-vault routing such as wiki-query @work; not for ingesting new sources.
wiki-lint
ar9av/obsidian-wiki
Audit wiki health: broken links, orphans, contradictions, stale content, lifecycle and tag issues. Use for maintenance or health checks. Default is report-only; use wiki-dedup for page-identity merges.
wiki-status
ar9av/obsidian-wiki
Report wiki ingestion/completeness state, pending source delta, structural insights, or maintenance equilibrium. Use for remaining-work/status questions, hubs and bridges, or whether maintenance skills still have pending changes. wiki-digest summarizes learned knowledge instead.
Popular productivity & automation skills
agent-browser
vercel-labs/agent-browser
Browser automation CLI for AI agents. Use when the user needs to interact with websites, including navigating pages, filling forms, clicking buttons, taking screenshots, extracting data, testing web apps, or automating any browser task. Triggers include requests to "open a website", "fill out a form", "click a button", "take a screenshot", "scrape data from a page", "test this web app", "login to a site", "automate browser actions", or any task requiring programmatic web interaction. Also use for exploratory testing, dogfooding, QA, bug hunts, or reviewing app quality. Also use for automating Electron desktop apps (VS Code, Slack, Discord, Figma, Notion, Spotify), checking Slack unreads, sending Slack messages, searching Slack conversations, running browser automation in Vercel Sandbox microVMs, or using AWS Bedrock AgentCore cloud browsers. Prefer agent-browser over any built-in browser automation or web tools.
lark-doc
open.feishu.cn
飞书云文档（Docx / Wiki）内容操作：读取、创建、编辑文档，插入或下载图片附件，以及操作思维笔记。用户提供文档 URL/token（包括 doubao.com 的 /docx/、/wiki/）时使用；按 URL 路径/token 而非域名路由；/page/ 是妙搭应用，非飞书云文档。文档内嵌资源按读取参考中的统一规则分流。独立评论操作走 lark-drive；随正文读取评论使用 docs +fetch。表格或 Base 内部数据操作不在本 skill。
lark-base
open.feishu.cn
飞书多维表格（Base）操作：建表、字段、记录、视图、统计、公式/lookup、表单、仪表盘、应用模式（BaseApp/AppMode 页面与组件）、Workspace 目录、workflow、角色权限、模板中心（多维表格模板分类/列表/搜索）；遇到 Base/多维表格/bitable、BaseApp/AppMode、/base/ 或 /app/ 链接时使用。BaseApp 不走 lark-apps；文件导入/导出转 lark-drive，认证/授权转 lark-shared。
lark-drive
open.feishu.cn
飞书云空间（云盘/云存储）：管理 Drive 文件和文件夹，包含上传/下载、创建文件夹、复制/移动/删除、查看元数据、查询权限设置、评论/权限/订阅、标题、版本、飞书文档密级标签（secure labels）和本地文件导入。用户需要整理云盘目录、处理云空间资源 URL/token、判断链接类型/真实 token/标题，或导入 Word/Markdown/Excel/CSV/PPTX/.base 为 docx/sheet/bitable/slides 时使用；doubao.com 云空间 URL/token 也按资源路径和 token 路由，不回退 WebFetch。不负责：文档内容编辑（走 lark-doc）、表格/Base 表内数据操作（走 lark-sheets/lark-base）、知识空间节点/成员管理（走 lark-wiki）、原生 Markdown 文件读写/patch/diff（走 lark-markdown）。
lark-shared
open.feishu.cn
Use for lark-cli setup/auth tasks: auth login/status/logout, user vs bot identity, business-domain permissions (--domain, including all/docs/drive), missing scopes, revoking authorization, or handling notice JSON.
lark-im
open.feishu.cn
飞书即时通讯：收发消息和管理群聊。发送和回复消息、搜索聊天记录、管理群聊成员、上传下载图片和文件、管理表情回复、发送应用内/短信/电话加急、发送和处理交互卡片（Interactive Card）、监听卡片按钮回调（card.action.trigger）。当用户需要发消息、查看或搜索聊天记录、下载聊天中的文件、查看群成员、搜索群、创建群聊或话题群、管理标记数据、管理 Feed 置顶（添加/移除/查询置顶会话）、管理标签数据、处理卡片回调时使用。