explain

A command that explains a decompiled function—a function reconstructed from compiled machine code—by describing its purpose, inputs, API calls, data flow, and calling context.

In plain words
What is it for?
Use it to examine a named function, search for a function pattern, inspect its direct or deeper callees, or limit the search to a specific module.
Why use it?
It gives you a quick understanding of one function without running a full code audit or execution trace.

Command

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.

agentmods
npx agentmods add commands/marcosd4h/deepextractruntime/explain
Clone the repo
git clone --depth 1 https://github.com/marcosd4h/DeepExtractRuntime
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 2,198 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00000 $0.02198
Opus 5 $0.00000 $0.01099
Sonnet 5 $0.00000 $0.00440
Haiku 4.5 $0.00000 $0.00220

Measured 2d ago against content hash 952f70b39701, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

explain 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 2d 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.

commands/explain.md · 142 lines

How it starts

The opening of the file, as written. The whole thing — 142 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Explain Function

Overview

Get a quick, structured explanation of what a decompiled function does -- its purpose, parameters, key API calls, data flow, and call context -- without running a full audit or trace pipeline.

The text after /explain specifies the function name and optionally the module:

  • /explain AiLaunchProcess -- searches all modules
  • /explain appinfo.dll AiLaunchProcess -- targets specific module
  • /explain appinfo.dll AiLaunchProcess --depth 2 -- include callee code 2 levels deep
  • /explain appinfo.dll --search LaunchProcess -- pattern search

If no function is specified, ask the user.

Default callee depth is 1 (direct callees only). Override with --depth N (0 = no callees, 2 = callees of callees, etc.). The script performs true BFS recursive traversal through the call chain, filtering boilerplate (WIL/CRT/ETW thunks) automatically.

IMPORTANT: Execution Model

This is an execute-immediately command. Do NOT present anything for user confirmation. Run and write the final explanation straight to the chat as your response. The user expects to see the completed output.

Execution Context

IMPORTANT: Any inline Python that imports helpers.* must run with cd <workspace>/.claude (so the .claude/ directory is on sys.path), not from the workspace root. Script invocations like python .claude/skills/.../script.py can be run from the workspace root because those scripts manage their own path setup.

Steps

Step 0: Preflight Validation

Validate arguments using helpers.command_validation.validate_command_args("explain", {"module": "<module>", "function": "<function>"}). If validation fails, report the errors and stop. On success, use result.resolved["db_path"] for subsequent script calls.

  1. Locate the function Quick lookup: Use python .claude/skills/function-index/scripts/lookup_function.py <function_name> to locate the function across all modules instantly. Cross-dimensional search: When the search term might match a string, API call, or class name, use python .claude/helpers/unified_search.py <db_path> --query <term> to search all dimensions at once. Otherwise, use the decompiled-code-extractor skill (find_module_db.py then list_functions.py --search) to resolve the module DB and exact function name.

Read the full file on GitHub · 142 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. 2d ago First seen · 142 lines · 0 tokens per session scan A 952f70b39701

Subscribe to this mod's changes

explain is a command published in the GitHub repository marcosd4h/DeepExtractRuntime (20 stars, last pushed 3mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,198 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 2026-08-30.