systems-discover

systems-discover is a skill for Claude Code from fivol/claude-make-better. It costs 89 tokens per session (6,081 once invoked), scanned A, original, MIT.

A codebase discovery tool that builds and maintains docs/SYSTEMS.md, a registry of the systems found in a project and how they are grouped.

In plain words
What is it for?
Scanning the whole repository or one area, finding systems across subsystems, merging related systems, and rebuilding or incrementally updating the registry.
Why use it?
It turns scattered implementation details into a shared map that can be used for later system reviews.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter. Also seen: model in frontmatter; mentions subagents; names the AskUserQuestion tool.

Part of the make-better plugin — 4 skills shipped together

Good fit Scanning the whole repository or one area, finding systems across subsystems, merging related systems, and rebuilding or incrementally updating the registry.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/fivol/claude-make-better/systems-discover
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 fivol/claude-make-better --skill systems-discover
Clone the repo
git clone --depth 1 https://github.com/fivol/claude-make-better

Made for: Claude Code.

Or install make-better, the plugin that ships this one along with the rest of its 4 skills.

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 systems-discover

README.md
[![agentmods](https://agentmods.dev/badge/skills/fivol/claude-make-better/systems-discover/github.svg)](https://agentmods.dev/skills/fivol/claude-make-better/systems-discover)
Your own site
<a href="https://agentmods.dev/skills/fivol/claude-make-better/systems-discover"><img src="https://agentmods.dev/badge/skills/fivol/claude-make-better/systems-discover/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 systems-discover

Your own site · 80×15
<a href="https://agentmods.dev/skills/fivol/claude-make-better/systems-discover"><img src="https://agentmods.dev/badge/skills/fivol/claude-make-better/systems-discover.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 89 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 6,081 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 $0.00089 $0.06081
Opus 5 $0.00044 $0.03040
Sonnet 5 $0.00018 $0.01216
Haiku 4.5 $0.00009 $0.00608

Measured 10d ago against content hash b1c3749d63c7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

systems-discover 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 10d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (bin/load-config.py, bin/load-config.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/make-better/skills/systems-discover/SKILL.md · 433 lines

How it starts

The opening of the file, as written. The whole thing — 433 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are the main agent for the /systems-discover skill. The user invoked you to build or update docs/SYSTEMS.md — the registry consumed by /systems-review. Follow this flow exactly.

Inputs

User input is in $ARGUMENTS. Parse in this order:

  1. Detect flags (any position): --yes, -y, --auto → set non_interactive = true. --rebuild → set mode = "rebuild". Strip these flags from the token list. Default mode = "incremental", non_interactive = false.
  2. Whatever remains (joined with spaces) → optional <area> filter. If nothing remains, area = null (full repo).

Examples:

  • (empty) → mode=incremental, area=null, non_interactive=false
  • fluttermode=incremental, area="flutter", non_interactive=false
  • --rebuildmode=rebuild, area=null, non_interactive=false
  • --rebuild auth or auth --rebuildmode=rebuild, area="auth", non_interactive=false
  • --yesmode=incremental, area=null, non_interactive=true
  • --rebuild --yes fluttermode=rebuild, area="flutter", non_interactive=true

Configuration

Load the merged config by running:

bash ${CLAUDE_SKILL_DIR}/bin/load-config.sh

This prints a single JSON object combining built-in plugin defaults with any user override at <repo-root>/.claude/make-better/config.json. All knobs come from this object. Do not read any config file directly — always go through the loader.

Standing project instructions

Rules that apply to everything this skill does in the repo. Two optional sources, both applied whenever present:

  • instructions — array of strings in the merged config (strictly an array; the loader exits with an error otherwise). A discover: section's list replaces the common top-level one rather than extending it.
  • <repo-root>/.claude/make-better/INSTRUCTIONS.md — free-form markdown. _meta.instructions_applied says whether it exists; read it from _meta.instructions_path.

If either is non-empty, assemble both into one project_instructions text block, apply it to your own merge/naming decisions, and pass it verbatim to every scan agent. Typical use here: how the team names or carves up systems ("group by bounded context, not by folder", "never propose a system per HTTP handler"). Both empty ⇒ omit the block entirely.

Read the full file on GitHub · 433 lines

Files

What ships with it

5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 10d ago First seen · 433 lines · 89 tokens per session scan A b1c3749d63c7

Subscribe to this mod's changes

systems-discover is a skill published in the GitHub repository fivol/claude-make-better (5 stars, last pushed 29d ago), licensed MIT. It adds 89 tokens to every session and 6,081 once invoked, about $0.0004 per session on Opus 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.

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