Borrowing it
Nothing to install: this file belongs to mcpc-tech/dev-inspector-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/mcpc-tech/dev-inspector-mcp/main/.agents/skills/dev-inspector/SKILL.mdgit clone --depth 1 https://github.com/mcpc-tech/dev-inspector-mcpWrote 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.
[](https://agentmods.dev/skills/mcpc-tech/dev-inspector-mcp/dev-inspector)<a href="https://agentmods.dev/skills/mcpc-tech/dev-inspector-mcp/dev-inspector"><img src="https://agentmods.dev/badge/skills/mcpc-tech/dev-inspector-mcp/dev-inspector/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.
<a href="https://agentmods.dev/skills/mcpc-tech/dev-inspector-mcp/dev-inspector"><img src="https://agentmods.dev/badge/skills/mcpc-tech/dev-inspector-mcp/dev-inspector.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00097 | $0.01978 |
| Opus 5.5 | $0.00039 | $0.00791 |
| Sonnet 5.5 | $0.00019 | $0.00396 |
| Haiku 4.5 | $0.00010 | $0.00198 |
Grade A, and why
dev-inspector 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.
How it starts
The opening of the file, as written. The whole thing — 195 lines — stays where its author put it; the contents beside it link to each section on GitHub.
DevInspector Integration
Step 1: Analyze the User's Project
Before doing anything, determine the project setup by checking:
- Bundler -- Look for
vite.config.ts,next.config.ts,webpack.config.js, orreact-router.config.tsin the project root. - Framework -- Check
package.jsondependencies forreact,vue,svelte,solid-js,preact,next,react-router. - Package manager -- Check for
pnpm-lock.yaml(pnpm),yarn.lock(yarn), orpackage-lock.json(npm). - App Router vs Pages Router (Next.js only) -- Check if
app/layout.tsxorsrc/app/layout.tsxexists (App Router) vspages/_app.tsx(Pages Router). - Existing inspector setup -- Search for
@mcpc-tech/unplugin-dev-inspector-mcpinpackage.jsonor config files. If already configured, skip to troubleshooting.
Step 2: Install
Use the detected package manager:
# pnpm
pnpm add -D @mcpc-tech/unplugin-dev-inspector-mcp
# npm
npm i -D @mcpc-tech/unplugin-dev-inspector-mcp
# yarn
yarn add -D @mcpc-tech/unplugin-dev-inspector-mcp
Add --no-optional if the user only needs MCP (editor mode) and not ACP agents (browser mode).
Step 3: Run Automated Setup (Preferred)
The setup command auto-detects the bundler, modifies the config, and for Next.js also injects <DevInspector /> into the root layout.
npx @mcpc-tech/unplugin-dev-inspector-mcp setup
Choose flags based on the analysis from Step 1:
| Scenario | Flag |
|---|---|
| Non-HTML project (miniapps, SSR) | --entry src/main.ts |
| Next.js with non-standard layout | --entry src/app/layout.tsx |
| Cloud IDE / Docker / remote dev | --host 0.0.0.0 |
| Behind reverse proxy or tunnel | --public-base-url https://your-domain.com |
| CI or headless environment | --disable-chrome |
| Auto-open browser on start | --auto-open-browser |
| Restrict to specific agents | --visible-agents "Claude Code,Gemini CLI" |
| Preview without writing files | --dry-run |
| Specific bundler (when multiple) | --bundler vite or --bundler nextjs |
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.
- 2mo ago First seen · 195 lines · 97 tokens per session scan A d628381e78c8
dev-inspector is a skill published in the GitHub repository mcpc-tech/dev-inspector-mcp (47 stars, last pushed 7mo ago), licensed MIT. It adds 97 tokens to every session and 1,978 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.
dev-inspector compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| dev-inspectormcpc-tech/dev-inspector-mcp | Skill | 47 | 7mo ago | MIT | A | 97 | Claude Code, Codex |
| d3kvercel-labs/dev3000 | Skill | 1.6k | 7d ago | MIT | A | 41 | Codex |
| surfnicobailon/surf-cli | Skill | 684 | yesterday | MIT | A | 53 | Claude Code, Codex |
| devtools-bidirectionalTanStack/devtools | Skill | 510 | yesterday | MIT | A | 59 | Claude Code, Codex |
| devtools-instrumentationTanStack/devtools | Skill | 510 | yesterday | MIT | A | 64 | Claude Code, Codex |
| node-modules-inspectorantfu/node-modules-inspector | Skill | 3.0k | 1mo ago | MIT | A | 156 | Claude Code, Codex |
| openocdzhinkgit/embeddedskills | Skill | 785 | 18d ago | MIT | A | 247 | Claude Code |