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mcp-linear: Command for GitHub Copilot

.github/prompts/implement-mcp-tool.prompt.md

implement-mcp-tool is a command for GitHub Copilot from tacticlaunch/mcp-linear. It costs 0 tokens per session (189 once invoked), scanned A, original, MIT.

A repository procedure for adding or changing a tool that follows the Model Context Protocol (MCP), a standard way for an AI agent to call software functions. It covers the service code, tool definitions, input checks, documentation, and tests.

In plain words
What is it for?
Use it to implement or update an MCP tool in the mcp-linear repository, add focused tests, and verify the change with the project's test and build commands.
Why use it?
It removes the need to remember every place where a new tool must be registered and checked. It also reduces mismatches between accepted inputs, returned data, and the documented interface.

Command for GitHub Copilot

Written for GitHub Copilot: a Copilot chat mode or prompt.

This is tacticlaunch/mcp-linear's own configuration. It tells GitHub Copilot how to work on mcp-linear 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 mcp-linear configures →

not rated 148repo 17d ago A scan 0 tokens original MIT
View source ↗ tacticlaunch/mcp-linear
Reuse

Borrowing it

Nothing to install: this file belongs to tacticlaunch/mcp-linear. 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/tacticlaunch/mcp-linear/main/.github/prompts/implement-mcp-tool.prompt.md
Clone the repo
git clone --depth 1 https://github.com/tacticlaunch/mcp-linear

Made for: GitHub Copilot.

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 implement-mcp-tool

README.md
[![agentmods](https://agentmods.dev/badge/commands/tacticlaunch/mcp-linear/implement-mcp-tool/github.svg)](https://agentmods.dev/commands/tacticlaunch/mcp-linear/implement-mcp-tool)
Your own site
<a href="https://agentmods.dev/commands/tacticlaunch/mcp-linear/implement-mcp-tool"><img src="https://agentmods.dev/badge/commands/tacticlaunch/mcp-linear/implement-mcp-tool/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 implement-mcp-tool

Your own site · 80×15
<a href="https://agentmods.dev/commands/tacticlaunch/mcp-linear/implement-mcp-tool"><img src="https://agentmods.dev/badge/commands/tacticlaunch/mcp-linear/implement-mcp-tool.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 189 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 $0.00189
Opus 5.5 $0.00000 $0.00076
Sonnet 5.5 $0.00000 $0.00038
Haiku 4.5 $0.00000 $0.00019

Measured 25d ago against content hash 93e0d7a2763f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

implement-mcp-tool 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 25d 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.

.github/prompts/implement-mcp-tool.prompt.md · 21 lines

What it actually says

Add or update an MCP tool in the mcp-linear repository.

Requirements:

  • Inspect existing patterns before editing.
  • Check @linear/sdk before writing direct GraphQL.
  • Implement or update the service method in #file:../../src/services/linear-service.ts.
  • Wire the full MCP surface:
    • tool definitions in #file:../../src/tools/definitions/index.ts
    • handlers in #file:../../src/tools/handlers/index.ts
    • runtime validation in #file:../../src/tools/type-guards.ts
  • Update #file:../../TOOLS.md.
  • Add focused tests under #file:../../src/__tests__/linear-service.test.ts or a new adjacent test file.
  • Run npm test and npm run build.

Quality bar:

  • Keep output normalization honest about nullability.
  • Keep handlers thin.
  • Explain any SDK fallback to direct GraphQL.
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. 25d ago First seen · 21 lines · 0 tokens per session scan A 93e0d7a2763f

Subscribe to this mod's changes

implement-mcp-tool is a command published in the GitHub repository tacticlaunch/mcp-linear (148 stars, last pushed 17d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 189 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 2026-10-05.

Building agentsTestingclaudecursorlinearmcp
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