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Custom-MCPs: Skill for Claude Code

.agents/skills/manage-agent-config/SKILL.md

manage-agent-config is a skill for Claude Code from Edison-Watch/Custom-MCPs. It costs 50 tokens per session (759 once invoked), scanned A, a copy of manage-agent-config, MIT.

A set of instructions for managing coding-agent configuration files shared between Claude and Codex.

In plain words
What is it for?
Use it when creating or editing skills, subagents, or path-specific rules, then run the project’s synchronisation command.
Why use it?
It helps keep skills, agents, and rules in the correct source locations and synchronised between the two tools.

Skill for Claude Code

Written for Claude Code: ${CLAUDE_SKILL_DIR} variable. Also seen: reads .claude/ paths; mentions subagents; positional $N argument.

This is Edison-Watch/Custom-MCPs's own configuration. It tells Claude Code how to work on Custom-MCPs itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything Custom-MCPs configures →

not rated 0repo 3d ago A scan 50 tokens copy · 86% MIT
View source ↗ Edison-Watch/Custom-MCPs
Reuse

Borrowing it

Nothing to install: this file belongs to Edison-Watch/Custom-MCPs. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/Edison-Watch/Custom-MCPs/main/.agents/skills/manage-agent-config/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/Edison-Watch/Custom-MCPs

Made for: Claude Code.

Wrote 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.

agentmods badge for manage-agent-config

README.md
[![agentmods](https://agentmods.dev/badge/skills/edison-watch/custom-mcps/manage-agent-config/github.svg)](https://agentmods.dev/skills/edison-watch/custom-mcps/manage-agent-config)
Your own site
<a href="https://agentmods.dev/skills/edison-watch/custom-mcps/manage-agent-config"><img src="https://agentmods.dev/badge/skills/edison-watch/custom-mcps/manage-agent-config/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.

agentmods 80×15 button for manage-agent-config

Your own site · 80×15
<a href="https://agentmods.dev/skills/edison-watch/custom-mcps/manage-agent-config"><img src="https://agentmods.dev/badge/skills/edison-watch/custom-mcps/manage-agent-config.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 759 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 86% copy Near-identical to another mod in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00050 $0.00759
Opus 5 $0.00025 $0.00380
Sonnet 5 $0.00010 $0.00152
Haiku 4.5 $0.00005 $0.00076

Measured 8d ago against content hash aa26c2504356, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

manage-agent-config 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 8d 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.

Origin

This is a copy

86% identical to manage-agent-config — 28 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agents/skills/manage-agent-config/SKILL.md · 58 lines

How it starts

The opening of the file, as written. The whole thing — 58 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Managing Claude <-> Codex skills and subagents in this repo

This repo is dual-tool. Before you create or edit anything under .claude/, .agents/, or .codex/, read this and the detailed rule at .claude/rules/codex-claude-sync.md.

Decision tree

Creating a new skill?

  1. Does it need Claude-only features (allowed-tools, argument substitutions, shell preprocessing, or Claude-specific interpolations)?
    • Yes -> .claude/skills/<name>/SKILL.md (real directory, no symlink). Claude-only.
    • No -> .agents/skills/<name>/SKILL.md. Shared; make sync-agent-config creates the .claude/skills/<name> symlink.

Creating a new subagent?

  • Always edit .claude/agents/<name>.md (markdown + YAML frontmatter). That is the source of truth.
  • .codex/agents/<name>.toml is generated - never hand-edit.
  • Run make sync-agent-config - the TOML appears.

Creating a new path-scoped rule?

  • .claude/rules/<name>.md is the source of truth. Use globs: frontmatter (not paths:).
  • .agents/rules/<name>.md is a symlink mirror, created by make sync-agent-config.
  • Read the new-agent-rule skill before writing your first rule.

Renaming or deleting?

  • Rename or delete the source file (under .agents/skills/, .claude/agents/, or .claude/rules/).
  • Run make sync-agent-config - stale symlinks and orphaned TOMLs are pruned automatically.

Frontmatter rules for shared skills

.agents/skills/<name>/SKILL.md must only use:

  • name (required, lowercase-hyphens, <=64 chars)
  • description (required, <=250 chars - Codex and Claude use this for implicit matching)
  • Plain markdown body

Do not use any of these in a shared skill:

  • allowed-tools, disable-model-invocation, user-invocable, context, agent, model, effort, hooks, paths, shell, argument-hint
  • $ARGUMENTS, $1...$N, ${CLAUDE_SKILL_DIR}, ${CLAUDE_SESSION_ID} substitutions
  • Backtick-bang shell preprocessing or fenced shell-preprocessing blocks

Read the full file on GitHub · 58 lines

Changes

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.

  1. 8d ago First seen · 58 lines · 50 tokens per session scan A aa26c2504356

Subscribe to this mod's changes

manage-agent-config is a skill published in the GitHub repository Edison-Watch/Custom-MCPs (0 stars, last pushed 3d ago), licensed MIT. It adds 50 tokens to every session and 759 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 86% identical to manage-agent-config, differing in 28 lines, and is treated as a copy.

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