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.
npx skills add oaustegard/claude-skills --skill mapping-webappgit clone --depth 1 https://github.com/oaustegard/claude-skillsWrote 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.
[](https://agentmods.dev/skills/oaustegard/claude-skills/mapping-webapp)<a href="https://agentmods.dev/skills/oaustegard/claude-skills/mapping-webapp"><img src="https://agentmods.dev/badge/skills/oaustegard/claude-skills/mapping-webapp/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.
<a href="https://agentmods.dev/skills/oaustegard/claude-skills/mapping-webapp"><img src="https://agentmods.dev/badge/skills/oaustegard/claude-skills/mapping-webapp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00091 | $0.01486 |
| Opus 5 | $0.00046 | $0.00743 |
| Sonnet 5 | $0.00018 | $0.00297 |
| Haiku 4.5 | $0.00009 | $0.00149 |
Grade A, and why
mapping-webapp 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 today.
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.
How it starts
The opening of the file, as written. The whole thing — 160 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Mapping Webapp
Generate _FEATURES.md files documenting what a web app does — screens, flows, states, behavioral invariants. Companion to tree-sitting, which surfaces code structure.
v0.3.0: Code-first architecture. The code IS the ground truth; screenshots are supplementary verification.
Prerequisites
- tree-sitting must be installed (structure is scanned at runtime)
- Claude API key available (via
api-credentialsskill orANTHROPIC_API_KEYenv var) - Optional: webctl for visual verification (not required for
--code-only)
Usage
# 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
Options
| Flag | Default | Description |
|---|---|---|
--app-url |
required | Base URL of the web app |
--codebase |
required | Path to repo root |
--output |
<codebase>/_FEATURES.md |
Output path |
--max-pages |
100 |
Cap on pages to discover |
--code-only |
false |
Skip all vision — code analysis only |
--verify-only |
false |
Only run vision on already-analyzed pages |
--batch-size |
auto | Pages per batch (auto-detected from environment) |
--incremental |
false |
Only re-process changed pages |
--viewport |
1280x720 |
Screenshot viewport (WxH) |
--routes |
none | Comma-separated routes or path to routes file |
--screenshots-dir |
<codebase>/screenshots |
Where to store PNGs |
--model |
claude-sonnet-4-6 (set in scripts/featuremap.py; that file is the source of truth) |
Claude model for analysis/vision |
--dry-run / -n |
false |
Discover only, print sitemap |
What ships with it
13 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.
- CHANGELOG.md 1.1 KB
- scripts/__init__.py 69 B runs code
- scripts/analyze.py 8.8 KB runs code
- scripts/assemble.py 6.0 KB runs code
- scripts/auth_instructions.py 2.6 KB runs code
- scripts/capture.py 4.2 KB runs code
- scripts/codecontext.py 3.6 KB runs code
- scripts/describe.py 6.9 KB runs code
- scripts/discover.py 16 KB runs code
- scripts/environment.py 2.1 KB runs code
- scripts/featuremap.py 16 KB runs code
- scripts/staleness.py 6.8 KB runs code
- scripts/verify.py 5.1 KB runs code
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.
- today Changed d5facaa19ce9
- 6d ago First seen · 160 lines · 91 tokens per session scan A b19f1bbda1ec
mapping-webapp is a skill published in the GitHub repository oaustegard/claude-skills (148 stars, last pushed today), licensed MIT. It adds 91 tokens to every session and 1,486 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 2026-09-03.
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