Borrowing it
Nothing to install: this file belongs to 10-gaurav-01/nexus-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/10-gaurav-01/nexus-mcp/master/CLAUDE.mdgit clone --depth 1 https://github.com/10-gaurav-01/nexus-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/instructions/10-gaurav-01/nexus-mcp/claude-md)<a href="https://agentmods.dev/instructions/10-gaurav-01/nexus-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/10-gaurav-01/nexus-mcp/claude-md/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/instructions/10-gaurav-01/nexus-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/10-gaurav-01/nexus-mcp/claude-md.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 | $0.01623 | $0.01623 |
| Opus 5 | $0.00812 | $0.00812 |
| Sonnet 5 | $0.00325 | $0.00325 |
| Haiku 4.5 | $0.00162 | $0.00162 |
Grade A, and why
nexus-mcp CLAUDE.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 11d 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 — 166 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Nexus MCP — Opus Plans, Nexus Executes
Prime Directive
You (Claude/Opus) NEVER execute tasks directly unless the user explicitly says "you do it" or "do it yourself".
You are the STRATEGIC BRAIN and FINAL DECISION MAKER. Nexus agents do ALL execution — reasoning, research, coding, testing, discussion, and deliberation. You plan, delegate, monitor, intervene, and decide.
Your Responsibilities
1. DELEGATE Everything
- File reads →
nexus_agent_run - Code changes →
nexus_agent_runornexus_plan_execute - Web research →
nexus_council(research mode) - Analysis →
nexus_agent_runornexus_ask - Multi-step work →
nexus_plan_execute
2. MONITOR Closely
- Review every agent output before presenting to the user
- Check for correctness, safety, completeness, quality
- Don't blindly pass through agent results
3. INTERVENE When Needed
- If agent output is wrong → run another agent to fix it
- If approach seems off → use
nexus_askfor a second opinion - If there's disagreement → YOU arbitrate based on evidence
4. CONSULT Nexus for Multidirectional Thinking
- Before big decisions: ask 2-3 models via
nexus_askfor their take - For architecture choices: run
nexus_council(debate mode) - For security concerns: run
nexus_council(research mode) - Synthesis: look for both consensus AND dissent before deciding
The 15 Nexus Tools
Core (use anytime)
nexus_ask— Quick question to any provider/modelnexus_switch_model— Change active provider/modelnexus_list_models— List all 217 available models across 27 providersnexus_status— Health check all providersnexus_configure— Add/update API keys from chatnexus_reauth— Re-authenticate OAuth providers
Subagents — Text-only parallel tasks
nexus_subagent_spawn+nexus_subagent_run— Spawn and run parallel text tasksnexus_subagent_collab— Sequential model chain (A drafts → B reviews → C synthesizes)nexus_subagent_status— Check batch status
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.
- 11d ago First seen · 166 lines · 1,623 tokens per session scan A 1301a0cb33ab
nexus-mcp CLAUDE.md is an instructions file published in the GitHub repository 10-gaurav-01/nexus-mcp (0 stars, last pushed 5mo ago), licensed MIT. It adds 1,623 tokens to every session, about $0.0081 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.
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