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.
npx agentmods add instructions/marlonjd/web-debug-mcp/agents-mdgit clone --depth 1 https://github.com/MarlonJD/web-debug-mcpWhat 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 | $0.00858 | $0.00858 |
| Opus 5 | $0.00429 | $0.00429 |
| Sonnet 5 | $0.00172 | $0.00172 |
| Haiku 4.5 | $0.00086 | $0.00086 |
Grade A, and why
web-debug-mcp AGENTS.md 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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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.
- 2d ago First seen · 54 lines · 858 tokens per session scan A 61082eaa8966
web-debug-mcp AGENTS.md is an instructions file published in the GitHub repository MarlonJD/web-debug-mcp (6 stars, last pushed 2d ago), with no licence file. It adds 858 tokens to every session, about $0.0043 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 2026-08-31.
Other instructions, from other repositories
rustwright AGENTS.md
Instructions for Skyvern-AI/rustwright, covering repository instructions, public boundary, pull-request review, local verification and browser launches.
stealth-chrome-devtools-mcp CLAUDE.md
Claude Code instructions for DevinoSolutions/stealth-chrome-devtools-mcp, covering claude.md — navigation map for agents, the four conventions (non-negotiable), navigation map (the tree as it is), top-level and embedded/ — the backend.
tvcontrol AGENTS.md
AGENTS.md instructions for FerroxLabs/tvcontrol, covering agents.md, 0. non-negotiables, 1. before writing code, 2. writing code: simplicity first and 3. surgical changes.
tvcontrol CLAUDE.md
Claude Code instructions for FerroxLabs/tvcontrol, covering tvcontrol — claude instructions, decision tree — which tool when, "what's on my chart right now?", "what levels/lines/labels are showing?" and "give me price data".
refract AGENTS.md
AGENTS.md instructions for valternunez/refract, covering refract — agent playbooks, playbook: verify a responsive bug fix, playbook: visual-diff before merge, playbook: screenshot a page behind a login and playbook: find horizontal overflow on a pr preview.
helm CLAUDE.md
Claude Code instructions for tylergibbs1/helm, covering helm — semantic browser automation mcp server, project structure, running, mcp config and key design decisions.