Mapping Webapp

What it does

When your agent uses it

• Documenting app behavior
• Creating feature inventories
• Generating behavioral ground truth for agents
• Before modifying UI code

Example prompts

• “map features”
• “document app behavior”
• “feature inventory”
• “/mapping-webapp”

Requirements

• Python 3
• A credential in ANTHROPIC_API_KEY

Workflow steps

4 steps, taken from the step headings in SKILL.md.

1. 1DISCOVER
2. 2ANALYZE
3. 3VERIFY (optional)
4. 4ASSEMBLE

What it can do on your machine

Read from SKILL.md and the folder at commit 559a6cd. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Ships 12 files in scripts/ (Python), which the agent can run.

  Shell commands in SKILL.md call:

  • python

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names these keys or tokens, usually read from environment variables:

  • ANTHROPIC_API_KEY

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Mapping Webapp loads about 1.5k tokens when it runs. Until then it costs about 120 tokens; SKILL.md has 549 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~120

When it runs · the whole SKILL.md, loaded when a task matches

~1.5k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

The full file from oaustegard/claude-skills at commit 559a6cd, republished under its MIT licence (© oaustegard). 549 words, ~1,544 tokens.

name

mapping-webapp

description

Generate behavioral/feature documentation for web apps using code-first analysis. Reads source code via tree-sitting to produce _FEATURES.md, with optional visual verification via browser automation. Companion to tree-sitting. Use when documenting app behavior, creating feature inventories, generating behavioral ground truth for agents, or before modifying UI code. Triggers on "map features", "document app behavior", "feature inventory", "what does this app do".

metadata.version

0.4.1

# Code-only analysis (no browser needed):
python /mnt/skills/user/mapping-webapp/scripts/featuremap.py \
  --app-url https://example.com --codebase /path/to/repo --code-only

# Full pipeline (code analysis + selective visual verification):
python /mnt/skills/user/mapping-webapp/scripts/featuremap.py \
  --app-url https://example.com --codebase /path/to/repo

# Incremental update:
python /mnt/skills/user/mapping-webapp/scripts/featuremap.py \
  --app-url https://example.com --codebase . --incremental

# _FEATURES.md — App Name
Generated: 2026-03-22T12:00:00+0000
App URL: https://example.com

## Feature Inventory

### Status Summary
- **Documented:** 45 pages
  - Code-analyzed: 40
  - Visually verified: 5
- **Gated (auth required):** 2 pages

### Page Title (`/route`)
> *Derived from source code analysis*

**What the user sees:** Prose description from code analysis.

**Interactions:**
- Button "X" → does Y

**Invariants:**
- Rule 1

**Code:** `src/page.html` :1

---

© oaustegard, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 13 other files (scripts) in mapping-webapp of oaustegard/claude-skills.

• SKILL.md
• CHANGELOG.md
• scripts/__init__.py
• scripts/analyze.py
• scripts/assemble.py
• scripts/auth_instructions.py
• scripts/capture.py
• scripts/codecontext.py
• scripts/describe.py
• scripts/discover.py
• scripts/environment.py
• scripts/featuremap.py
• scripts/staleness.py
• scripts/verify.py

Open the folder on GitHubat commit 559a6cd

Used in 1 other repository

We found 3 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in oaustegard/claude-skills, which our catalogue first saw on October 7, 2026.

• majiayu000/claude-skill-registryskills/analysis/mapping-webappskills/analysis/mapping-features