topo

topo is a skill for Claude Code, Codex from KeithWhatling/ToPO. It costs 135 tokens per session (1,253 once invoked), scanned A, original, Apache-2.0.

A documentation skill for maintaining a TOPO map, a platform-independent file that records what software components are for and how they depend on one another. Concrete implementations are documented through platform-specific profiles.

In plain words
What is it for?
Use it whenever you create, change, or remove project components so their relationships, data entities, logic, interfaces, and lifecycle are recorded.
Why use it?
As a project changes, it is easy for dependency links and component records to become incomplete or inconsistent. This keeps the system's structure and purpose in one shared map.

Skill for Claude CodeCodex

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 skills/keithwhatling/topo/guides
Any agent
npx skills add KeithWhatling/ToPO --skill guides
Clone the repo
git clone --depth 1 https://github.com/KeithWhatling/ToPO

Made for: Claude Code, Codex.

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 topo

README.md
[![agentmods](https://agentmods.dev/badge/skills/keithwhatling/topo/guides.svg)](https://agentmods.dev/skills/keithwhatling/topo/guides)
Your own site
<a href="https://agentmods.dev/skills/keithwhatling/topo/guides"><img src="https://agentmods.dev/badge/skills/keithwhatling/topo/guides.svg" alt="Measured on agentmods" height="20"></a>
Per session 135 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,253 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 $0.00135 $0.01253
Opus 5 $0.00068 $0.00626
Sonnet 5 $0.00027 $0.00251
Haiku 4.5 $0.00014 $0.00125

Measured 5d ago against content hash 896249275140, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

topo 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 5d 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.

guides/SKILL.md · 113 lines

How it starts

The opening of the file, as written. The whole thing — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.

TOPO Skill — Topology of Platform Objects

Purpose

The TOPO map (docs/solution-map.topo) is the single source of truth for how components relate to each other and why they exist. This skill defines how to read, write, and maintain .topo files.

Full language reference: docs/topo-language-spec.md SOPs: docs/topo-standard-operating-procedures.md File extension: .topo (markdown-compatible; associate with markdown syntax highlighting)


1. Quick Reference — Component Tags

Tag Type When to create a block
[DE] Data Entity New table/collection/document designed
[DF] Data Field Field added that drives logic
[DR] Data Relationship Relationship between entities
[SL] Server Logic Server-side component created
[CL] Client Logic Client-side component created
[API] API Exposed interface created
[SF] Shared Function Reusable function created
[BP] Background Process Async/scheduled process created
[UC] UI Control Custom UI component created
[CFG] Config Pattern Config entity + handler pair created
[IB] Integration Boundary External system connection created

2. Quick Reference — Relationship Types

Type Meaning Impact
depends_on A requires B B's failure breaks A
serves A provides to B A's change may break B
triggers A causes B to run A's changes affect B
flows_to Data moves A to B A's schema may break B
realizes A implements B B's contract change requires A update
configures A provides config to B A's schema affects B
contains B is part of A B's change always impacts A
subscribes_to A listens to B B's event schema affects A
maps_to Abstract to concrete Platform profile mapping
supersedes A replaces B B's dependents should migrate

3. Bidirectional Dependency Rule

Read the full file on GitHub · 113 lines

Files

What ships with it

1 file 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. 5d ago First seen · 113 lines · 135 tokens per session scan A 896249275140

Subscribe to this mod's changes

topo is a skill published in the GitHub repository KeithWhatling/ToPO (2 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 135 tokens to every session and 1,253 once invoked, about $0.0007 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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