copilot-runtime

copilot-runtime is a skill for Claude Code from wkin-t/claude-copilot-plugin. It costs 39 tokens per session (708 once invoked), scanned A, original, MIT.

An internal set of instructions for Claude Code subagents that invoke GitHub Copilot's command-line tool. It covers how to pass prompts, choose models, and handle non-interactive runs.

In plain words
What is it for?
Use it only inside the specified Copilot task and review subagents. It helps with prompt delivery, model routing, context passing, and background execution.
Why use it?
It gives those subagents a consistent way to call Copilot and receive its result. It is marked as internal and is not intended for direct use.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter. Also seen: mentions CLAUDE.md; mentions subagents; mentions Claude Code.

Part of the copilot-cli plugin — 1 skill, 2 agents shipped together

Good fit Use it only inside the specified Copilot task and review subagents. It helps with prompt delivery, model routing, context passing, and background execution.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/wkin-t/claude-copilot-plugin/copilot-runtime
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 wkin-t/claude-copilot-plugin --skill copilot-runtime
Clone the repo
git clone --depth 1 https://github.com/wkin-t/claude-copilot-plugin

Made for: Claude Code.

Or install copilot-cli, the plugin that ships this one along with the rest of its 1 skill, 2 agents.

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 copilot-runtime

README.md
[![agentmods](https://agentmods.dev/badge/skills/wkin-t/claude-copilot-plugin/copilot-runtime/github.svg)](https://agentmods.dev/skills/wkin-t/claude-copilot-plugin/copilot-runtime)
Your own site
<a href="https://agentmods.dev/skills/wkin-t/claude-copilot-plugin/copilot-runtime"><img src="https://agentmods.dev/badge/skills/wkin-t/claude-copilot-plugin/copilot-runtime/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 copilot-runtime

Your own site · 80×15
<a href="https://agentmods.dev/skills/wkin-t/claude-copilot-plugin/copilot-runtime"><img src="https://agentmods.dev/badge/skills/wkin-t/claude-copilot-plugin/copilot-runtime.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 708 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 $0.00039 $0.00708
Opus 5.5 $0.00016 $0.00283
Sonnet 5.5 $0.00008 $0.00142
Haiku 4.5 $0.00004 $0.00071

Measured 2mo ago against content hash ccb6c030b0cf, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

copilot-runtime 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 2mo 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.

plugins/copilot-cli/skills/copilot-runtime/SKILL.md · 73 lines

How it starts

The opening of the file, as written. The whole thing — 73 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Copilot CLI Runtime

Use this skill only inside copilot-cli:copilot-task and copilot-cli:copilot-review subagents.

Invocation Template

Always use a temporary file to pass the prompt — this avoids shell injection when file contents are embedded.

Run the Bash call with run_in_background: true, then immediately use Monitor to stream the result. Never use sleep, until loops, or output-file polling to wait for completion.

_prompt_file=$(mktemp /tmp/copilot-prompt-XXXXXX.txt)
cat > "$_prompt_file" << 'PROMPT_EOF'
<task_prompt>
PROMPT_EOF
copilot -p "$(cat "$_prompt_file")" \
  --model <model> \
  [--effort <effort>] \
  -s \
  --allow-all \
  [--add-dir <working_dir>]
rm -f "$_prompt_file"

With -s (silent), copilot emits output only once at completion — Monitor fires exactly when the result is ready, with no wasted polling rounds.

Required Flags

Flag Purpose
-s / --silent Only output model response, suppress stats
--allow-all Grant all permissions for non-interactive mode. Grants Copilot CLI full tool access — do not use in untrusted environments

Model Routing

Model Used by Strengths
claude-sonnet-4-6 copilot-task (fixed) Context-heavy delegation, exploration, architecture
gpt-5.4 copilot-review (fixed) Edge cases, boundary conditions, adversarial review
gpt-5-mini Debug only — never for real tasks Plugin testing

Agents hard-code their model choice; do not override. Default --effort high for all real tasks.

Context Injection

⚠️ Privacy notice: Copilot CLI auto-loads ./CLAUDE.md and ./.claude/CLAUDE.md from the working directory and sends them to GitHub Copilot (Microsoft/OpenAI servers). If your CLAUDE.md contains internal system prompts, proprietary constraints, or sensitive business context, run from a clean directory or ensure your CLAUDE.md is safe to share externally.

For additional context (memory, file contents): embed directly in the prompt inside <context> tags.

Read the full file on GitHub · 73 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. 2mo ago First seen · 73 lines · 39 tokens per session scan A ccb6c030b0cf

Subscribe to this mod's changes

copilot-runtime is a skill published in the GitHub repository wkin-t/claude-copilot-plugin (4 stars, last pushed 6mo ago), licensed MIT. It adds 39 tokens to every session and 708 once invoked, about $0.0002 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 2026-08-31.

Related

copilot-runtime compared with skills from other repositories

copilot-runtime next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
copilot-runtimewkin-t/claude-copilot-pluginSkill46mo agoMITA39Claude Code
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playwright-climicrosoft/playwrightSkill100ktodayApache-2.0A19Claude Code
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local-ai-agentsmicrosoft/ai-agents-for-beginnersSkill79k5d agoMITA200Claude Code, Codex
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