Fix README link to point to GitHub repo

Author: x4cc3

README.md

@@ -149,7 +149,7 @@ Third-party plugins built by the community. [PRs welcome](#contributing)!
 - [Archcore](https://github.com/archcore-ai/plugin) - Gives coding agents the architecture, rules, and prior decisions of the repo via skills, hooks, and MCP — so new changes land where the project says they belong across Claude Code, Cursor, and Codex CLI.
 - [Bring Your AI Migration Auditor](https://github.com/unitedideas/bringyour-mcp) - Read-only Codex plugin for auditing Claude Code to Codex migrations before Codex edits code. Checks AGENTS.md/CLAUDE.md scope, hooks, MCP config, skills, secret references, and validation notes.
 - [Brooks Lint](https://github.com/hyhmrright/brooks-lint) - AI code reviews grounded in six classic engineering books — decay risk diagnostics with book citations, severity labels, and four analysis modes (PR review, architecture audit, tech debt, test quality).
-- [Casefile](./plugins/x4cc3/casefile) - Persistent security case tracking for bug bounties, CTFs, and security audits.
+- [Casefile](https://github.com/x4cc3/casefile) - Persistent security case tracking for bug bounties, CTFs, and security audits.
 - [Changelog Forge](./plugins/mturac/changelog-forge) - Conventional commits → CHANGELOG section + semver bump.
 - [Claude Code for Codex](https://github.com/sendbird/cc-plugin-codex) - Reverse of OpenAI's official Claude-hosted plugin: use Claude Code from Codex for reviews, rescue tasks, tracked background jobs, and hook-powered review gates.
 - [Claude Code Harness](https://github.com/dadwadw233/claude-code-harness) - Harness blueprint skill for turning vague agent ideas into concrete designs for request assembly, control loops, memory, permissions, recovery, and extension planes.