📋 Copy Blueprint Command { } Inspect JSON API Ground-Truth Source ↗

⚡ 1-Click Agent & Developer Install

Zero Auth · Ready for Grok Bot, Claude Code & Cursor

### 1. Problem & Operational Bottleneck Audit social sign-in and account-claim flows for strict PKCE `S256` challenge verification, `HttpOnly` state cookies, and exact redirect URIs. Built and battle-tested in production workflows by **@threepointone** (Sunil Pai (@threepointone)). ### 2. Target Architecture & Required Stack - **GitHub MCP** - **Playwright MCP** - **Cloudflare MCP** ### 3. Step-by-Step Implementation Blueprint 1. Configure and authenticate the required MCP connectors (GitHub MCP, Playwright MCP, Cloudflare MCP) in your agent workspace. 2. Run the initial read-only inspection pass for 'OAuth 2.0 PKCE S256 & Open-Redirect Hardening Blueprint' to gather baseline telemetry, schemas, and context. 3. Execute the multi-step analysis and transformation pipeline with strict schema validation and zero fabricated identifiers. 4. Review the staged diff or approval card and verify completion via automated regression and status checks. ### 4. Copy-Paste Agent Execution Prompt ```markdown Run the 'OAuth 2.0 PKCE S256 & Open-Redirect Hardening Blueprint' (oauth2-pkce-state-and-redirect-uri-hardening) implementation blueprint using GitHub MCP, Playwright MCP, Cloudflare MCP. Objective: Audit social sign-in and account-claim flows for strict PKCE `S256` challenge verification, `HttpOnly` state cookies, and exact redirect URIs. Step 1: Perform a read-only audit of current state and recent logs. Step 2: Generate a deterministic execution plan with exact diffs, SQL/CLI commands, or drafted payloads. Step 3: Request human confirmation before applying any production writes or external sends. ``` ### 5. Verification & Safety Guardrails - **Human-in-the-Loop Gate:** All external communications, production database mutations, and billing actions stage an explicit review diff before execution. - **Deterministic Telemetry:** Every run logs structured JSON output, latency metrics, and source citations so operators can audit every decision.

Tags: #github-mcp#playwright-mcp#cloudflare-mcp#blueprint#security-ops

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