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 agentmods add skills/johnkozaris/web-interact-plugin/web-interactnpx skills add johnkozaris/web-interact-plugin --skill web-interactgit clone --depth 1 https://github.com/johnkozaris/web-interact-pluginWhat 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 | $0.00144 | $0.05330 |
| Opus 5 | $0.00072 | $0.02665 |
| Sonnet 5 | $0.00029 | $0.01066 |
| Haiku 4.5 | $0.00014 | $0.00533 |
Grade C, and why
web-interact scanned grade C with 2 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 2d 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.
Downloads and executes remote codehighSupply chain
curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.
curl --proto '=https' --tlsv1.2 -LsSf https://github.com/johnkozaris/web-interact/releases/latest/download/web-interact-installer.sh | sh Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl --proto '=https' --tlsv1.2 -LsSf https://github.com/johnkozaris/web-interact/releases/latest/download/web-interact-installer.sh | sh How it starts
The opening of the file, as written. The whole thing — 493 lines — stays where its author put it; the contents beside it link to each section on GitHub.
web-interact
Browser automation CLI. Each shell command maps to one browser action.
Uses Playwright by default (switch to Patchright with web-interact mode assistant).
Designed for automating your own web applications — please use responsibly.
Core loop
The workflow is always: open → discover → act by index → re-discover after changes.
web-interact --headless open "https://example.com"
web-interact --headless discover # → [1] input "Email" [2] input[password] ...
web-interact --headless fill 1 "[email protected]"
web-interact --headless fill 2 "password"
web-interact --headless click 3 # submit — triggers navigation
web-interact --headless discover # ALWAYS re-discover after navigation or form submission
Re-discover after: navigation, form submission, AJAX updates, tab switches, or any action that changes the page. Indices auto-refresh when the URL changes, but explicitly re-discover after same-page DOM changes (modals, accordions, dynamic content).
Output contract
- Actions (click, fill, press, scroll, etc.): no output on success (exit 0). Error text on stderr (exit 1).
- Getters (get url, get title, eval): raw value on stdout.
- Data (tab list, cookies get, storage local): JSON on stdout.
- Screenshots: file path on stdout.
- Vision (
--vision): plain screenshot path on stderr asvision:/path/file.png. - Vision + annotate (
--vision --annotate): annotated screenshot with element overlays.
Key distinctions
fillclears existing value then types. Use for form fields.typeappends to existing value. Use for search boxes with autocomplete, or adding to existing text.clickby index uses CDP mouse events (works on any element including React/Vue/Canvas).clickby CSS selector uses JS DOM click (simpler, works for standard elements).keyboard type "text"types without targeting an element (for canvas apps, active element input).mouse click 100 200clicks at viewport coordinates (for canvas/WebGL apps where elements aren't in DOM).
What ships with it
5 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.
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.
- 2d ago First seen · 493 lines · 144 tokens per session scan C 91971c3af82d
web-interact is a skill published in the GitHub repository johnkozaris/web-interact-plugin (2 stars, last pushed 5mo ago), licensed MIT. It adds 144 tokens to every session and 5,330 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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