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DecompilerServer: Instructions file for GitHub Copilot

.github/copilot-instructions.md

DecompilerServer copilot-instructions.md is an instructions file for GitHub Copilot from pardeike/DecompilerServer. It costs 605 tokens per session, scanned A, original, MIT.

Repository-specific instructions for DecompilerServer, a software project for decompiling and comparing code. They describe its architecture, tool conventions, search methods, and verification expectations.

In plain words
What is it for?
They are for guiding work with the project’s MCP tools, symbol searches, member resolution, decompilation, structured results, and repository documentation.
Why use it?
They help an agent make changes that fit the project’s existing structure and use the intended tools for finding and comparing code.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file.

This is pardeike/DecompilerServer's own configuration. It tells GitHub Copilot how to work on DecompilerServer 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 DecompilerServer configures →

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is ./scripts/verify.py.

not rated 124repo +2 changed 23d ago A scan 605 tokens original MIT
View source ↗ pardeike/DecompilerServer
Reuse

Borrowing it

Nothing to install: this file belongs to pardeike/DecompilerServer. 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/pardeike/DecompilerServer/main/.github/copilot-instructions.md
Clone the repo
git clone --depth 1 https://github.com/pardeike/DecompilerServer

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 DecompilerServer copilot-instructions.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/pardeike/decompilerserver/copilot-instructions/github.svg)](https://agentmods.dev/instructions/pardeike/decompilerserver/copilot-instructions)
Your own site
<a href="https://agentmods.dev/instructions/pardeike/decompilerserver/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/pardeike/decompilerserver/copilot-instructions/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 DecompilerServer copilot-instructions.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/pardeike/decompilerserver/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/pardeike/decompilerserver/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 605 This file is loaded in full into every session.
When invoked 605 The same file — it is already loaded in full.
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 $0.00605 $0.00605
Opus 5.5 $0.00242 $0.00242
Sonnet 5.5 $0.00121 $0.00121
Haiku 4.5 $0.00060 $0.00060

Measured 23d ago against content hash 805108315529, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

DecompilerServer copilot-instructions.md 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 23d 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/copilot-instructions.md · 54 lines

How it starts

The opening of the file, as written. The whole thing — 54 lines — stays where its author put it; the contents beside it link to each section on GitHub.

DecompilerServer Copilot Instructions

Read these files first:

  • ARCHITECTURE.md for durable technical rules and contracts
  • README.md for user-facing workflow
  • TODO.md for backlog

Repository-Specific Rules

  • MCP tools live as static methods under Tools/.
  • Tools should return via ResponseFormatter.TryExecute(...).
  • Discovery/search tools should route with using var session = ToolSessionRouter.GetForContext(...).
  • memberId follow-up tools should route with using var session = ToolSessionRouter.GetForMember(...).
  • Reuse TypeSurfaceComparer for type-surface semantics instead of duplicating compare logic.
  • Use DecompilerService.DecompileEntitySnippet(...) for focused compare body retrieval.
  • Prefer structured JSON output over pre-rendered diff text for overview commands.
  • For unknown foreign code, start with search_symbols for fragments. For fully-qualified or XML-doc-like guessed symbols, start with resolve_member_id so structured member_not_found diagnostics can resolve the type and suggest candidates.
  • After a type resolves, use list_members, then source or caller/callee tools. Do not fall back to shell scans after one bad member guess unless MCP diagnostics are exhausted.

Workspace and Compare Expectations

  • Assume multi-context workspace support is the primary model.
  • Preserve stable member ID format: <mvid-32hex>:<token-8hex>:<kind-code>.
  • compare_contexts is structural. changed means direct member surface changed.
  • compare_symbols(compareMode: "body") is method-only and should stay opt-in.
  • Do not broaden compare semantics casually; update ARCHITECTURE.md if a durable contract changes.

Testing

  • Use xUnit and real compiled test assemblies.
  • Tests/ServiceTestBase.cs is the base fixture for service-level tests.
  • Add dedicated *ToolTests.cs files for MCP tool behavior.
  • Use Tests/TemporaryAssemblyBuilder.cs for controlled version-drift and compare tests.
  • When tests need workspace-aware behavior, register DecompilerWorkspace in the test service provider.

Read the full file on GitHub · 54 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. 23d ago Changed · -7 tokens per session 805108315529
  2. 1mo ago Changed · +1 lines · +53 tokens per session 33d49fabb45a
  3. 1mo ago First seen · 53 lines · 559 tokens per session scan A 55cb249dbb3a

Subscribe to this mod's changes

DecompilerServer copilot-instructions.md is an instructions file published in the GitHub repository pardeike/DecompilerServer (124 stars, last pushed 24d ago), licensed MIT. It adds 605 tokens to every session, about $0.0024 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.

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