proxy-auth-transport

proxy-auth-transport is a cursor rule for Cursor from tomasz-tomczyk/crit. It costs 5 tokens per session (848 once invoked), scanned A, original, MIT.

A development rule for making crit-web API actions work through either direct command-line requests or an authenticated browser relay. Both paths use the same API endpoints and data formats.

In plain words
What is it for?
Adding or changing crit-web interactions that need both bearer-token access and browser-session authentication.
Why use it?
It prevents features from working in only one authentication mode and keeps browser-mediated requests consistent with direct requests.

Cursor rule for Cursor

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.

agentmods
npx agentmods add rules/tomasz-tomczyk/crit/proxy-auth-transport
Clone the repo
git clone --depth 1 https://github.com/tomasz-tomczyk/crit

Made for: Cursor.

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 proxy-auth-transport

README.md
[![agentmods](https://agentmods.dev/badge/rules/tomasz-tomczyk/crit/proxy-auth-transport.svg)](https://agentmods.dev/rules/tomasz-tomczyk/crit/proxy-auth-transport)
Your own site
<a href="https://agentmods.dev/rules/tomasz-tomczyk/crit/proxy-auth-transport"><img src="https://agentmods.dev/badge/rules/tomasz-tomczyk/crit/proxy-auth-transport.svg" alt="Measured on agentmods" height="20"></a>
Per session 5 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 848 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
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 $0.00005 $0.00848
Opus 5 $0.00003 $0.00424
Sonnet 5 $0.00001 $0.00170
Haiku 4.5 $0.00001 $0.00085

Measured 3d ago against content hash 1bd83fe373e8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

proxy-auth-transport scanned grade A with 1 finding 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 3d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

Direct (non-proxy_auth) browser actions must go through the **local Go server**, never `fetch(shareURL + …)` cross-origin:
.cursor/rules/proxy-auth-transport.mdc · 53 lines

How it starts

The opening of the file, as written. The whole thing — 53 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Proxy Auth Transport Rules

Rule 1: Both transport modes required

Every CLI command or browser UI action that calls a crit-web API must work in both modes:

  • Direct (default): Go server makes HTTP requests with bearer token
  • Browser relay (proxy_auth: true): Browser popup mediates the same API call through an authenticated session

When adding a new crit-web interaction:

  1. Add the direct HTTP path in Go (share.go or relevant file)
  2. Add a server endpoint that returns the payload for the popup relay (server.go)
  3. Add a popup handler in crit-web/assets/js/share_receiver/handlers.js (note: the directory/route is named share_receiver / /share-receiver — this describes what the component does (receives share data), while proxy_auth describes why it's needed. Both names are correct at their level.)
  4. Add the relay call in web/app.js gated on proxy_auth

Rule 2: Relay is transport, not protocol

The popup relay must hit the same crit-web API endpoints with the same payload shapes as the direct path. No relay-specific endpoints on crit-web. The popup handlers are same-origin fetch proxies.

Rule 3: Terminal CLI commands cannot use direct HTTP when proxy_auth is on

When proxy_auth: true (global config), crit-web sits behind an SSO reverse proxy. The terminal cannot complete that auth flow — only the browser can (via the /share-receiver popup relay).

Terminal subcommands that HTTP-call crit-web directly (today: crit share, crit fetch, crit unpublish) must call checkProxyAuthCLIAllowed("crit <cmd>") at the top of their Run* entrypoint and exit with the shared error message. Do not attempt the network call.

Browser UI actions (Share / Pull / Unpublish / Re-share buttons in the review page) must still work: implement both transports per Rule 1 — direct when proxy_auth is false, popup relay when true (web/crit-share.js + crit-web share_receiver/handlers.js).

Direct (non-proxy_auth) browser actions must go through the local Go server, never fetch(shareURL + …) cross-origin:

Read the full file on GitHub · 53 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. 3d ago First seen · 53 lines · 5 tokens per session scan A 1bd83fe373e8

Subscribe to this mod's changes

proxy-auth-transport is a cursor rule published in the GitHub repository tomasz-tomczyk/crit (979 stars, last pushed 5d ago), licensed MIT. It adds 5 tokens to every session and 848 once invoked, about $0.0000 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.