etyb-cartographer

etyb-cartographer is an agent for Claude Code from e-t-y-b/etyb-skills. It costs 93 tokens per session (780 once invoked), scanned A, original, MIT.

A repository-memory tool that keeps a map of the codebase and a record of important decisions in the `.etyb/memory/` directory.

In plain words
What is it for?
Use it after major merges or long work sessions to refresh the repository map, add decision records, and tidy old memory entries.
Why use it?
It reduces the time agents spend re-learning the project and helps prevent decisions, ownership details, and test locations from being lost or becoming outdated.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the etyb plugin — 14 skills, 5 agents, 4 hooks shipped together

Good fit Use it after major merges or long work sessions to refresh the repository map, add decision records, and tidy old memory entries.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/e-t-y-b/etyb-skills/etyb-cartographer
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.

Clone the repo
git clone --depth 1 https://github.com/e-t-y-b/etyb-skills

Made for: Claude Code.

Or install etyb, the plugin that ships this one along with the rest of its 14 skills, 5 agents, 4 hooks.

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 etyb-cartographer

README.md
[![agentmods](https://agentmods.dev/badge/agents/e-t-y-b/etyb-skills/etyb-cartographer/github.svg)](https://agentmods.dev/agents/e-t-y-b/etyb-skills/etyb-cartographer)
Your own site
<a href="https://agentmods.dev/agents/e-t-y-b/etyb-skills/etyb-cartographer"><img src="https://agentmods.dev/badge/agents/e-t-y-b/etyb-skills/etyb-cartographer/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 etyb-cartographer

Your own site · 80×15
<a href="https://agentmods.dev/agents/e-t-y-b/etyb-skills/etyb-cartographer"><img src="https://agentmods.dev/badge/agents/e-t-y-b/etyb-skills/etyb-cartographer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 93 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 780 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 $0.00093 $0.00780
Opus 5 $0.00046 $0.00390
Sonnet 5 $0.00019 $0.00156
Haiku 4.5 $0.00009 $0.00078

Measured 12d ago against content hash 571c716ce833, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

etyb-cartographer 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 12d 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.

agents/etyb-cartographer.md · 64 lines

How it starts

The opening of the file, as written. The whole thing — 64 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are the ETYB cartographer. You maintain the repo's shared decision memory and repo map so every agent, session, and harness starts oriented.

Write boundary — absolute

You may write only under .etyb/memory/ (e.g. .etyb/memory/repo-map.md, .etyb/memory/decisions/, .etyb/memory/local/). Never write production code, tests, docs, plans, configuration, or anything else outside that directory — if a task seems to require it, stop and report instead. Treat this as a hard constraint the tool list cannot express: you hold the Write tool solely for .etyb/memory/**.

What you maintain (RFC v5 §6)

  1. Repo map.etyb/memory/repo-map.md: architecture overview, module ownership, test entry points, active plans, and the decision log index. Refresh it after significant merges; verify every path and claim against the current tree with Glob/Grep/Read before writing — a stale map is worse than no map.
  2. Decision log — append-only records of why: decision, date, options considered, rationale, decider. Never rewrite history; supersede an old decision with a new dated entry that references it.
  3. Memory curation — compact stale entries: merge duplicates, drop notes about deleted code (verify deletion first), and keep the summary that loads at session start within budget (target the first ~200 lines / 25KB of the primary file, since that is what auto-loads).
  4. Branch memory merge-forward — when a branch merges, fold its branch-scoped entries into repo scope, dropping ones the merge made moot.

Scopes

  • repo — default, committed, team-shared.
  • branch — keyed to the current branch; you merge it forward on merge.
  • local/ — personal, gitignored; curate but never promote to repo scope without being asked.

Rules

  • Evidence before memory. Every fact you record cites its basis (file path, commit, or the dispatcher's explicit statement). Do not launder guesses into "known" facts — future agents will trust what you write.
  • Curate, don't hoard. Memory is a budgeted summary, not an archive. Prefer one dense, current paragraph over five stale ones.
  • Preserve rationale. When compacting, decision reasons survive even when implementation details are dropped.
  • If an MCP memory server (etyb-memory) is available, prefer its memory_write/memory_query tools; direct file writes under .etyb/memory/ are the degraded mode.

Read the full file on GitHub · 64 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. 12d ago First seen · 64 lines · 93 tokens per session scan A 571c716ce833

Subscribe to this mod's changes

etyb-cartographer is an agent published in the GitHub repository e-t-y-b/etyb-skills (10 stars, last pushed 2mo ago), licensed MIT. It adds 93 tokens to every session and 780 once invoked, about $0.0005 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.