repo-map-first

repo-map-first is a skill for Claude Code, Codex from PANYUXIN6/pyx-skills. It costs 65 tokens per session (1,585 once invoked), scanned A, original, MIT.

A guide for deciding where code changes belong in an existing repository, using evidence from its structure and documentation. A repository map records important owners, entry points, data flows, and dependency directions.

In plain words
What is it for?
Use it before behavior changes with unclear ownership, changes that cross boundaries, dependency or entry-point changes, or work in an unfamiliar part of a repository. It can also create or repair repository map documents when requested.
Why use it?
It reduces the risk of putting a change in the wrong layer or missing effects across connected parts of the codebase. It also helps detect when repository maps are missing or out of date.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it before behavior changes with unclear ownership, changes that cross boundaries, dependency or entry-point changes, or work in an unfamiliar part of a repository. It can also create or repair repository map documents when requested.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/panyuxin6/pyx-skills/repo-map-first
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 PANYUXIN6/pyx-skills --skill repo-map-first
Clone the repo
git clone --depth 1 https://github.com/PANYUXIN6/pyx-skills

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 repo-map-first

README.md
[![agentmods](https://agentmods.dev/badge/skills/panyuxin6/pyx-skills/repo-map-first/github.svg)](https://agentmods.dev/skills/panyuxin6/pyx-skills/repo-map-first)
Your own site
<a href="https://agentmods.dev/skills/panyuxin6/pyx-skills/repo-map-first"><img src="https://agentmods.dev/badge/skills/panyuxin6/pyx-skills/repo-map-first/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 repo-map-first

Your own site · 80×15
<a href="https://agentmods.dev/skills/panyuxin6/pyx-skills/repo-map-first"><img src="https://agentmods.dev/badge/skills/panyuxin6/pyx-skills/repo-map-first.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 65 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,585 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00065 $0.01585
Opus 5 $0.00032 $0.00792
Sonnet 5 $0.00013 $0.00317
Haiku 4.5 $0.00006 $0.00159

Measured 5d ago against content hash 75b5bdf0a4fc, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

repo-map-first 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.

repo-map-first/SKILL.md · 120 lines

How it starts

The opening of the file, as written. The whole thing — 120 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Place Changes with Repository Evidence

Resolve where a change belongs before implementing it when placement mistakes could cross responsibilities or spread through the wrong layer. Keep repository maps evidence-based and update them only when the task or an explicit request justifies the documentation work.

Select the Invocation Mode

Explicit Map Mode

Use this mode whenever the user names this skill or asks to create, repair, update, inspect, or use repository map documents.

The requested action determines the scope; naming the skill does not itself authorize document changes.

  • Inspect or use: read relevant existing maps, verify task-relevant claims against source, and report ownership, discrepancies, and limitations. Resolve missing information from source when possible. Missing or stale maps do not turn inspection into a creation or repair task.
  • Create, repair, or update: inspect existing maps and source, then create missing documents or repair stale relevant sections within the requested scope. When the user requests repository maps without naming documents, cover both docs/REPO_MAP.md and docs/ARCHITECTURE.md; a request for one document does not require creating its companion. Leave accurate sections unchanged.
  • Complete the requested map work before any dependent implementation. A map-only request ends with the map result and its evidence; it does not authorize code changes.

Map work is sufficient when the requested owners, entry points, flows, and dependencies are locatable and evidence-backed, with material unknowns explicit. Inspection may report an unresolved gap without modifying documents. Creation and repair must produce the requested artifacts or explain which missing evidence prevents that.

Automatic Placement-Risk Mode

Use this mode only when an existing-repository behavior change has a real placement risk, such as:

  • responsibility ownership or the implementation location remains unclear from the request and known context;
  • the change crosses module or layer boundaries;
  • entry points, dependency direction, public contracts, or key call flows may change;
  • the repository is unfamiliar and the work is non-local;
  • a relevant map appears missing, stale, contradictory, or insufficient for a cross-boundary decision.

Read the full file on GitHub · 120 lines

Files

What ships with it

3 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. 5d ago Changed · -1 lines · -21 tokens per session 75b5bdf0a4fc
  2. 11d ago First seen · 121 lines · 86 tokens per session scan A 59eecd445c6a

Subscribe to this mod's changes

repo-map-first is a skill published in the GitHub repository PANYUXIN6/pyx-skills (6 stars, last pushed 5d ago), licensed MIT. It adds 65 tokens to every session and 1,585 once invoked, about $0.0003 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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