Instruction file imported from Mezzy0710/KAIKATA (.cursor/rules/00-project-context.mdc). Copyright stays with the author.

CartForge — Always-On Context

What this is

Static client-side Cardmarket cart optimizer. Full spec in AGENTS.md. Current status and tech debt in CLAUDE.md. Read both before acting.

Repo

GitHub MCP is connected globally. Read PRs, issues, and diffs directly. Always check the actual PR diff before reasoning about what a PR changes. Repo: github.com/Mezzy0710/cardmarket-cart-optimizer

Hard constraints

• Vanilla JS (ES modules, .mjs). No frameworks. No build step. No bundler.
• Must run from open index.html and deploy to GitHub Pages unchanged.
• Portability first: no tool-specific magic, clear function boundaries, normal files.
• Correctness > polish. Parser and optimizer accuracy before visual refinement.
• Never silently discard uncertain input. Always surface ambiguity to the user.

Security — always enforced

• Use escapeHtml() before any DOM insertion of user-controlled strings.
• Use escapeAttribute() for all HTML attribute values.
• No eval(). No innerHTML with unsanitized data. No exceptions.

Skill invocation rules