express

express is a skill for Claude Code, Codex from adonai-labs/agent-runway. It costs 63 tokens per session (1,410 once invoked), scanned A, original, MIT.

A fast implementation path for a small, well-understood development task. It assumes the developer already knows the project and mainly needs a focused execution process.

In plain words
What is it for?
Use it for narrowly scoped fixes or changes, such as adding a guard, adjusting asynchronous code, or adding a request header.
Why use it?
It reduces planning overhead while retaining checks for unexpected complexity and a lightweight self-review. The developer keeps responsibility for design decisions.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions subagents.

Good fit Use it for narrowly scoped fixes or changes, such as adding a guard, adjusting asynchronous code, or adding a request header.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/adonai-labs/agent-runway/express
Install

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.

Any agent
npx skills add adonai-labs/agent-runway --skill express
Clone the repo
git clone --depth 1 https://github.com/adonai-labs/agent-runway

Made for: Claude Code, Codex.

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 express

README.md
[![agentmods](https://agentmods.dev/badge/skills/adonai-labs/agent-runway/express/github.svg)](https://agentmods.dev/skills/adonai-labs/agent-runway/express)
Your own site
<a href="https://agentmods.dev/skills/adonai-labs/agent-runway/express"><img src="https://agentmods.dev/badge/skills/adonai-labs/agent-runway/express/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 express

Your own site · 80×15
<a href="https://agentmods.dev/skills/adonai-labs/agent-runway/express"><img src="https://agentmods.dev/badge/skills/adonai-labs/agent-runway/express.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 63 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,410 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 original No closer match found 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 $0.00063 $0.01410
Opus 5 $0.00032 $0.00705
Sonnet 5 $0.00013 $0.00282
Haiku 4.5 $0.00006 $0.00141

Measured 9d ago against content hash 0219899a71e0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

express 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 9d 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.

src/core/skills/express/SKILL.md · 145 lines

How it starts

The opening of the file, as written. The whole thing — 145 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Express

Invoke Command

/express <description of what you want to build or fix>

Examples:

  • /express add null guard to OrderService.GetById
  • /express fix missing ConfigureAwait on async database call in PaymentHandler
  • /express add X-Correlation-Id header to outbound HTTP requests

Not sure if /express is right for this task? Run /start first — it will tell you whether the task fits /express or needs more ceremony.


What this skill does

Five phases. No approval gates except one: escalation signal confirmation if signals are detected in Phase 0.

The developer owns all design decisions. This skill enforces critical safety checks and a lightweight self-review — nothing more.

/express is not /lead Fast-Track Mode with fewer phases. It is a different skill designed from the ground up for minimal friction. It assumes the developer has full context, knows the codebase, and does not need a planning step.


Escalation signals

Checked in Phase 0. Also surface inline during Phase 2 if unexpected complexity emerges.

Signals are non-blocking — the developer always sees them and always decides. They are never a hard stop.

Simplicity policy:

  • /express is only for low-risk, reversible, low-uncertainty changes.
  • If risk profile does not match this, recommend /lead and stop instead of stretching /express.

Detection criteria

Signal Condition
Contract change The change modifies a public API, shared interface, or data contract consumed by other components or services
Cross-boundary The change touches more than one bounded context, service, or application layer in a non-trivial way
Security surface The change involves authentication, authorisation, input validation, secrets, or data exposure
Data migration The change requires a schema change or data transformation that cannot be easily rolled back
Multi-service coordination The change requires coordinated deployment or configuration across more than one service
Unknown territory The developer's description suggests unfamiliarity with the part of the codebase being changed

Read the full file on GitHub · 145 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. 9d ago First seen · 145 lines · 63 tokens per session scan A 0219899a71e0

Subscribe to this mod's changes

express is a skill published in the GitHub repository adonai-labs/agent-runway (2 stars, last pushed 19d ago), licensed MIT. It adds 63 tokens to every session and 1,410 once invoked, about $0.0003 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.

Related

Other skills, from other repositories

sdd-apply

Skill "sdd-apply" from Gentleman-Programming/gentle-ai, covering execution role, language domain contract, purpose, what you receive and execution and persistence contract.

Gentleman-Programming/gentle-ai · 0 tokens

next-action

Use when the user wants a next-action recommendation based on current state — reads handoff/git/lessons/STATE and proposes top-3 by impact. Trigger: '/next', 'what should I do next', 'next action'. Proposes only, never executes.

AlexZio00/sovereign-skills · 57 tokens

kafka-dlq-review

Review dead letter queue implementations for completeness using the Lenses MCP server. Checks DLQ topic existence, configuration, monitoring, metadata preservation, retry logic, reprocessing paths and connector DLQ alignment. Use when user says "review dead letter queues", "check DLQ setup", "DLQ audit" or asks about…

lensesio/agentic-engineering-for-apache-kafka · 93 tokens

kafka-connector-review

Review Kafka Connect connector configurations for common misconfigurations using the Lenses MCP server. Checks error handling, DLQ setup, converters, transforms, task count and task health. Use when user says "review connectors", "check connector configs", "why is my connector failing" or asks about Kafka Connect…

lensesio/agentic-engineering-for-apache-kafka · 79 tokens

kafka-perf-review

Review Kafka producer and consumer performance configurations in both the live cluster (via Lenses MCP) and the codebase. Flags un-tuned defaults, anti-patterns and missing best practices. Use when user says "review Kafka performance", "check producer configs", "tune Kafka settings" or asks about throughput, batching…

lensesio/agentic-engineering-for-apache-kafka · 82 tokens

kafka-schema-review

Review Kafka schema changes (Avro, Protobuf, JSON Schema) for compatibility and evolution best practices using the Lenses MCP server. Detects breaking changes, missing defaults, schema drift and naming issues. Use when user says "review schema changes", "check schema compatibility", "will this schema break consumers"…

lensesio/agentic-engineering-for-apache-kafka · 89 tokens