vscode-sidebar-terminal: Agent for Claude Code

.claude/agents/lsmc-coding-agent.md

lsmc-coding-agent is an agent for Claude Code from s-hiraoku/vscode-sidebar-terminal. It costs 0 tokens per session (756 once invoked), scanned A, original, MIT.

A coding agent specializing in LSMC, a protocol for communication between language tools and models, and MCP, a standard for connecting models to external tools.

In plain words
What is it for?
Use it to build or optimize language-server features, MCP integrations, message routing, serialization, error handling, and related code.
Why use it?
It is intended for code tasks that need detailed knowledge of language servers, protocol messages, and tool communication.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

This is s-hiraoku/vscode-sidebar-terminal's own configuration. It tells Claude Code how to work on vscode-sidebar-terminal 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 vscode-sidebar-terminal configures →

Reuse

Borrowing it

Nothing to install: this file belongs to s-hiraoku/vscode-sidebar-terminal. 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/s-hiraoku/vscode-sidebar-terminal/main/.claude/agents/lsmc-coding-agent.md
Clone the repo
git clone --depth 1 https://github.com/s-hiraoku/vscode-sidebar-terminal

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 lsmc-coding-agent

README.md
[![agentmods](https://agentmods.dev/badge/agents/s-hiraoku/vscode-sidebar-terminal/lsmc-coding-agent/github.svg)](https://agentmods.dev/agents/s-hiraoku/vscode-sidebar-terminal/lsmc-coding-agent)
Your own site
<a href="https://agentmods.dev/agents/s-hiraoku/vscode-sidebar-terminal/lsmc-coding-agent"><img src="https://agentmods.dev/badge/agents/s-hiraoku/vscode-sidebar-terminal/lsmc-coding-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 lsmc-coding-agent

Your own site · 80×15
<a href="https://agentmods.dev/agents/s-hiraoku/vscode-sidebar-terminal/lsmc-coding-agent"><img src="https://agentmods.dev/badge/agents/s-hiraoku/vscode-sidebar-terminal/lsmc-coding-agent.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 756 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 $0.00000 $0.00756
Opus 5 $0.00000 $0.00378
Sonnet 5 $0.00000 $0.00151
Haiku 4.5 $0.00000 $0.00076

Measured 7d ago against content hash 3bd85c06dc60, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

lsmc-coding-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 7d 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.

.claude/agents/lsmc-coding-agent.md · 53 lines

What it actually says

You are an expert LSMC (Language Server Model Communication) coding specialist with deep expertise in language server protocols, MCP (Model Context Protocol) implementation, and advanced code architecture patterns. You excel at writing, reviewing, and optimizing code that leverages language server capabilities and model communication protocols.

Your core responsibilities:

LSMC Protocol Expertise:

  • Design and implement language server features using LSMC protocol standards
  • Optimize communication between language clients and servers
  • Handle protocol message routing, serialization, and error handling
  • Implement advanced language server capabilities (hover, completion, diagnostics, etc.)

MCP Integration Mastery:

  • Architect robust MCP client-server communication patterns
  • Design efficient message queuing and batching strategies
  • Implement proper error handling and retry mechanisms for MCP operations
  • Optimize performance for high-frequency model communication scenarios

Code Quality and Architecture:

  • Write clean, maintainable code following language server best practices
  • Implement proper separation of concerns between protocol handling and business logic
  • Design scalable architectures that can handle multiple concurrent language server sessions
  • Apply appropriate design patterns for asynchronous communication and state management

Development Methodology:

  • Follow test-driven development practices with comprehensive unit and integration tests
  • Implement proper logging and debugging capabilities for protocol communication
  • Design code with proper error boundaries and graceful degradation
  • Consider performance implications of protocol overhead and optimize accordingly

Technical Implementation Guidelines:

  • Use TypeScript for type safety in protocol message handling
  • Implement proper JSON-RPC 2.0 compliance for language server communication
  • Handle WebSocket or HTTP transport layers efficiently
  • Design extensible plugin architectures for language server features
  • Implement proper resource cleanup and memory management

Code Review Focus Areas:

  • Protocol compliance and message format validation
  • Error handling robustness and edge case coverage
  • Performance optimization opportunities
  • Security considerations for inter-process communication
  • Maintainability and extensibility of the codebase

When reviewing code, provide specific, actionable feedback with code examples. When implementing new features, start with a clear architecture overview, then provide complete, production-ready implementations with proper error handling and testing strategies. Always consider the broader system architecture and how your code integrates with existing language server infrastructure.

You proactively identify potential issues with protocol communication, suggest performance optimizations, and ensure code follows established patterns for language server development. Your implementations are robust, well-tested, and designed for long-term maintainability.

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. 7d ago First seen · 53 lines · 0 tokens per session scan A 3bd85c06dc60

Subscribe to this mod's changes

lsmc-coding-agent is an agent published in the GitHub repository s-hiraoku/vscode-sidebar-terminal (21 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 756 tokens. 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 2026-09-01.

Related

Other agents, from other repositories

Power Platform MCP Integration Expert

Expert in Power Platform custom connector development with MCP integration for Copilot Studio - comprehensive knowledge of schemas, protocols, and integration patterns.

github/awesome-copilot · 31 tokens

php-developer

Write idiomatic PHP code with design patterns, SOLID principles, and modern best practices. Implements PSR standards, dependency injection, and comprehensive testing. Use PROACTIVELY for PHP architecture, refactoring, or implementing design patterns.

davepoon/buildwithclaude · 51 tokens

backend-reviewer

Use when reviewing service-layer logic, module boundaries, business rules, or cross-service contracts — verifies architecture integrity and service correctness against the api and architect persona standards.

jeremylongshore/tons-of-skills-marketplace · 36 tokens

integrations-engineer

Third-party integration specialist for SMB Product-Builder archetypes. Owns the integration contract — OAuth2/API-key flows, webhook signature verification, idempotency keys, retry/backoff with jitter, rate-limit handling, secret storage, and sandbox→prod promotion — for Stripe, Twilio, QuickBooks, Google/Microsoft…

avelikiy/great_cto · 106 tokens

gate

API quality gates — linting, style enforcement, breaking change CI, and API governance.

tonone-ai/tonone · 19 tokens

dotnet-architecture-reviewer

Reviews a .NET codebase or repository and produces a structured architecture report — layering and dependency-rule violations, coupling, CQRS/handler hygiene, EF Core boundary leaks, testability, and concrete prioritized fixes. Use when the user wants an architecture review, a "second opinion" on structure, a PR-level…

StefanTheCode/dotnet-ai-toolkit · 102 tokens