agentmods.dev

lanes: Skill for Claude Code

.agents/skills/new-agent/SKILL.md

new-agent is a skill for Claude Code from FilipeJesus/lanes. It costs 35 tokens per session (922 once invoked), scanned A, original, MIT.

A set of instructions for adding a new coding-agent backend to the Lanes VS Code extension. It guides the developer through collecting the agent’s command, settings, logo, and interaction details.

In plain words
What is it for?
Adding support for a command-line coding agent, including its prompts, session IDs, hooks, MCP settings, and permission flags.
Why use it?
It keeps agent-specific code in the expected files and reduces the chance of missing required details or breaking the extension’s structure.

Skill for Claude Code

Written for Claude Code: SessionStart hook event. Also seen: installed under .agents/ (shared by several agents); built for aider.

This is FilipeJesus/lanes's own configuration. It tells Claude Code how to work on lanes 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 lanes configures →

not rated 11repo changed 11d ago A scan 35 tokens original MIT
View source ↗ FilipeJesus/lanes
Reuse

Borrowing it

Nothing to install: this file belongs to FilipeJesus/lanes. 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/FilipeJesus/lanes/main/.agents/skills/new-agent/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/FilipeJesus/lanes

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 new-agent

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/filipejesus/lanes/new-agent"><img src="https://agentmods.dev/badge/skills/filipejesus/lanes/new-agent.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 922 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 $0.00035 $0.00922
Opus 5.5 $0.00014 $0.00369
Sonnet 5.5 $0.00007 $0.00184
Haiku 4.5 $0.00003 $0.00092

Measured 11d ago against content hash ee9328ca135b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

new-agent 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.

.agents/skills/new-agent/SKILL.md · 74 lines

How it starts

The opening of the file, as written. The whole thing — 74 lines — stays where its author put it; the contents beside it link to each section on GitHub.

New Agent Implementation

Implement a new code agent backend for Lanes, shared by the VS Code extension and CLI.

IRON LAW: Agent Abstraction

Keep agent-specific behavior in src/core/codeAgents/<ClassName>.ts. Shared services and UI must use the CodeAgent abstraction. Registration, exports, settings schema, tests, and documentation may be updated as described below.

Step 0: Gather information

Determine these details from the task and the agent's official documentation; ask for any missing information:

  1. Agent internal name - lowercase identifier, e.g. aider
  2. Display name - user-facing label, e.g. Aider
  3. CLI command - shell command that launches the agent, e.g. aider
  4. Data directory - where the agent stores config, e.g. .aider
  5. Logo SVG - inline SVG for the dropdown (ask the user to provide one, or search for the official logo)

Also determine these behavioral traits:

  • Hooks: Does the CLI emit lifecycle events (SessionStart, Stop, etc.)? If no, it's "hookless" and needs captureSessionId() — use CodexAgent.ts as reference.
  • Prompt passing: Positional argument (cli 'prompt') or stdin?
  • MCP support: If yes, how is config delivered — CLI flag, settings file, or -c overrides?
  • Permission modes: What flags does the CLI accept? (e.g. --yes, --yolo, --bypass)
  • Session ID format: UUID, numeric index, or something else?
  • Resume support: Does the CLI support --resume? What format?

Step 1: Study the base class and a reference agent

Read these files to understand the current abstract contract:

  • src/core/codeAgents/CodeAgent.ts — the abstract base class defines all required and optional methods, interfaces, and types. This is the source of truth for what must be implemented.
  • Pick the closest existing agent as reference:
    • Hook-based with MCP via CLI flag: ClaudeCodeAgent.ts
    • Hookless with MCP via CLI overrides: CodexAgent.ts
    • Hook-based with MCP via settings file: GeminiAgent.ts
    • Hook-based without MCP, stdin prompts: CortexCodeAgent.ts

Read the full file on GitHub · 74 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. 11d ago Changed · +2 lines · +14 tokens per session ee9328ca135b
  2. 2mo ago First seen · 72 lines · 21 tokens per session scan A 19dac67b9c6d

Subscribe to this mod's changes

new-agent is a skill published in the GitHub repository FilipeJesus/lanes (11 stars, last pushed 11d ago), licensed MIT. It adds 35 tokens to every session and 922 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-08-30.

Building agents
Related

Other skills, from other repositories

local-ai-agents

Build local-first AI agents that run entirely on a developer workstation with Microsoft Foundry Local and Qwen function-calling models. Covers Small Language Models (SLMs), the OpenAI-compatible local endpoint, sandboxed local tools, local RAG with Chroma, local MCP servers, hybrid cloud/local routing, and the…

microsoft/ai-agents-for-beginners · 200 tokens

systematic-debugging

Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.

obra/superpowers · 21 tokens

next-cache-components-adoption

Turn on Cache Components in a Next.js app and resolve the blocking routes it surfaces. Use when the user wants to enable, adopt, or migrate to Cache Components, flip the cacheComponents flag, work through a flood of blocking-prerender / instant validation errors, run the cache-components-instant-false codemod, or…

vercel/next.js · 95 tokens

chat-pet-sprite-creation

Use when creating or changing VS Code chat pet sprite art, sprite sheets, state animations, eye treatments, Stable/Insiders variants, or pet transitions under src/vs/workbench/contrib/chat/browser/widget/media/chatPet.

microsoft/vscode · 53 tokens

cpu-profile-analysis

Analyze V8/Chrome CPU profiles (.cpuprofile) and DevTools trace files (Trace-.json). Use when: profiling performance, investigating slow functions, comparing code paths, finding bottlenecks, analyzing timeToRequest, understanding call trees from sampling profiler data, analyzing layout/paint/rendering, investigating…

microsoft/vscode · 71 tokens

insight-error-page

Write or audit an insight-kind error page for the Next.js dev overlay. Use when creating a new errors/ .mdx page, auditing an existing one, or checking that a page matches the framework fix cards. Covers page structure, title alignment, FixCard cards with Copy prompt button, code snippets, terminology verification…

vercel/next.js · 83 tokens