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 skills add athola/claude-night-market --skill mcp-code-executiongit clone --depth 1 https://github.com/athola/claude-night-marketWrote 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/athola/claude-night-market/mcp-code-execution)<a href="https://agentmods.dev/skills/athola/claude-night-market/mcp-code-execution"><img src="https://agentmods.dev/badge/skills/athola/claude-night-market/mcp-code-execution/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/athola/claude-night-market/mcp-code-execution"><img src="https://agentmods.dev/badge/skills/athola/claude-night-market/mcp-code-execution.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00032 | $0.02225 |
| Opus 5 | $0.00016 | $0.01112 |
| Sonnet 5 | $0.00006 | $0.00445 |
| Haiku 4.5 | $0.00003 | $0.00222 |
Grade A, and why
mcp-code-execution 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 5d 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 — 251 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Table of Contents
- Quick Start
- When to Use
- Core Hub Responsibilities
- Required TodoWrite Items
- Step 1 – Assess Workflow
- Workflow Classification
- MECW Risk Assessment
- Step 2 – Route to Modules
- Module Orchestration
- Step 3 – Coordinate MECW
- Cross-Module MECW Management
- Step 4 – Synthesize Results
- Result Integration
- Module Integration
- With Context Optimization Hub
- Performance Skills Integration
- Emergency Protocols
- Hub-Level Emergency Response
- Success Metrics
MCP Code Execution Hub
Quick Start
This skill is an orchestration hub, not a CLI. It activates inside a Claude Code session when one of the trigger keywords below appears, or when invoked explicitly:
Skill(conserve:mcp-code-execution)
The hub then routes to the relevant sub-skill modules
(mcp-subagents, mcp-patterns, mcp-validation) based on
the detected workflow shape. There is no separate install
step or CLI entry point.
When To Use
- Automatic: Keywords:
code execution,MCP,tool chain,data pipeline,MECW - Tool Chains: >3 tools chained sequentially
- Data Processing: Large datasets (>10k rows) or files (>50KB)
- Context Pressure: Current usage >25% of total window (proactive context management)
MCP Tool Search (Claude Code 2.1.7+): When MCP tool descriptions exceed 10% of context, tools are automatically deferred and discovered via MCPSearch instead of being loaded upfront. This reduces token overhead by ~85% but means tools must be discovered on-demand. Haiku models do not support tool search. Configure threshold with
ENABLE_TOOL_SEARCH=auto:Nwhere N is the percentage.
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 5d ago First seen · 251 lines · 32 tokens per session scan A ad1e73e25498
mcp-code-execution is a skill published in the GitHub repository athola/claude-night-market (336 stars, last pushed 3d ago), licensed MIT. It adds 32 tokens to every session and 2,225 once invoked, about $0.0002 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 2026-09-03.
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