Skill Routing Kit

Make Codex pick the right skill or plugin more often.

中文说明 · Full English docs · Demo · Release notes

Why This Exists

Codex can have dozens of skills and plugins installed, but the correct one does not always trigger.

That creates a quiet productivity tax:

• a PDF input gets mistaken for the final artifact;
• a routing/debugging question gets handled by the wrong domain skill;
• connector plugins are considered even when the user's work is local;
• new skills are installed, but nobody remembers when to use them.

Skill Routing Kit adds a small local-first routing layer for Codex. It helps Codex answer:

What kind of task is this?
Where is the source of truth?
What is the final artifact?
Which skill should be primary?
Which plugin is only a helper?
When should a tempting skill not be used?

What You Get

• skill-router: a Codex skill for diagnosing skill/plugin routing decisions.
• Local registry: a JSON capability index with categories, use cases, negative examples, and provenance.
• Routing guard: an AGENTS.md snippet that makes routing a quiet default behavior.
• Diagnostic scripts: route a request, refresh the registry, and check stale or broken entries.
• Local-first safety: no background scan, no telemetry, no connector content reads, no network by default.

30-Second Install

If you use Codex, ask it to install the plugin for you:

Please install the Skill Routing Kit plugin from https://github.com/juew/Skill-Routing-Kit. Install the plugin source globally at ~/plugins/skill-routing-kit, register it in ~/.agents/plugins/marketplace.json, run codex plugin add skill-routing-kit@personal, and enable the routing guard globally in ~/.codex/AGENTS.md. Do not install it into the current project. Do not ask me to create directories manually; use the repository installer and verify the plugin after installation.

Or run one command:

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/juew/Skill-Routing-Kit/main/scripts/install.sh)" -- --install-agents --codex-add

The installer creates directories, updates your personal Codex marketplace, enables the plugin, and backs up older local copies.

Before And After

Routing Diagnostic

python3 scripts/route_request.py "为什么 pdf skill 没有命中这个请求"

Expected result:

Recommended skill/plugin:
- Skill Router (skill-router)

Helper skills/plugins:
- PDF (pdf)

Why:
- routing diagnostic request prefers the skill-router capability
- local-first preference

Final Artifact Routing

python3 scripts/route_request.py "把这个 PDF 整理成一份 PPT"

Expected result:

Recommended skill/plugin:
- Presentations (presentations)

Helper skills/plugins:
- PDF (pdf)

The final artifact is the presentation. The PDF skill is useful context, not the primary route.

More examples: docs/demo.md

How It Works

Skill Routing Kit turns skill/plugin selection into a lightweight recall-and-rerank loop.

flowchart LR
  A["User request"] --> B["Routing guard"]
  B --> C["Classify task, source, artifact, process"]
  C --> D["Recall candidates from registry"]
  D --> E["Rerank by final artifact, source, action, risk"]
  E --> F["Use primary skill/plugin"]
  E --> G["Keep helper skills contextual"]

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The methodology is simple:

• describe when to use each capability;
• classify capabilities into layered routing categories such as process, source, artifact, domain, and risk;
• describe when not to use each capability with negative examples;
• recall broad candidates first, then rerank by final artifact, source, task action, and permission risk.

Safety Model

This project is intentionally conservative.

• It reads local SKILL.md, plugin.json, and registry metadata.
• It does not read Gmail, Slack, Notion, Drive, or other connector content.
• It does not check connector authorization.
• It does not install hooks, telemetry, daemons, or background scanners.
• It can be removed by deleting the AGENTS.md block and uninstalling the plugin.

Common Commands

# Validate the plugin
python3 /Users/zhonghao/.codex/skills/.system/plugin-creator/scripts/validate_plugin.py .

# Run tests
python3 -B -m unittest discover -s tests

# Route one request
python3 scripts/route_request.py "帮我把这个 PDF 做成 PPT 并保留版式"

# Check registry health
python3 scripts/route_request.py --check-registry

# Refresh generated registry
python3 scripts/build_registry.py --yes

Who Should Star This

Star this repo if you are:

• building Codex skills or plugins;
• using many AI agent capabilities and seeing missed triggers;
• designing local-first agent workflows;
• maintaining a team skill library;
• interested in explainable routing for AI tools.

Roadmap

• Registry diff after skill/plugin install or removal.
• Better negative-example authoring tools.
• Optional embedding-based reranker.
• Route quality evaluation suite.
• UI screenshots and short demo GIF.
• More connector-aware but still local-first policy cards.

Documentation

• Chinese README
• Full English documentation
• Demo scenarios
• Release notes
• Promotion kit
• Contributing guide
• Changelog

License

MIT