chore: untrack AGENTS.md (AI working memory, not source code)

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-# moment-hijri-plus — PRI (Per-Repo Instructions)
-
-**PPI:** `~/Sites/acamarata/.claude/CLAUDE.md`
-
-## What This Is
-
-Moment.js plugin for Hijri calendar conversion and formatting. Delegates all calendar
-logic to hijri-core, a zero-dependency Hijri engine with pluggable calendar support.
-Supports Umm al-Qura and FCNA/ISNA calendars. Installed via a function call rather than
-`moment.extend()` — call `installHijri(moment)` once at startup.
-
-**npm:** `moment-hijri-plus@1.0.0`
-**Language:** TypeScript
-**License:** MIT
-
-## Key Technical Details
-
-- Peer dependencies: `moment@^2.0.0`, `hijri-core@^1.0.0`
-- Plugin pattern: `installHijri(moment)` called once at startup (not moment.fn.extend)
-- Instance methods added: `toHijri()`, `hijriYear()`, `hijriMonth()`, `hijriDay()`, `isValidHijri()`, `formatHijri()`
-- Static factory added: `moment.fromHijri(hy, hm, hd, options?)`
-- `formatHijri()` Hijri tokens: `iD`, `iMMMM`, `iYYYY`, `iM`, `iDD`, `iMM` — non-Hijri tokens pass through to moment.format()
-- Out-of-range inputs return `null` (instance methods) or empty string (formatHijri)
-- `fromHijri()` throws if the date is invalid or out of range
-- Dual CJS/ESM build via tsup
-- Zero runtime dependencies (peer deps are provided by the consumer)
-
-## Architecture
-
-`src/index.ts` exports the default `installHijri` function and shared types. Built to
-`dist/` (gitignored) with `.cjs` and `.mjs` outputs plus dual type declarations.
-
-## Commands
-
-- `pnpm install` — install dev deps
-- `pnpm build` — tsup build
-- `pnpm test` — run test.mjs + test-cjs.cjs
-- `pnpm run typecheck` — tsc --noEmit
-
-## Important Notes
-
-- This is a plugin for Moment.js — call `installHijri(moment)` once before using any methods
-- hijri-core provides the actual calendar engine — this package is a thin adapter
-- Changes to hijri-core's API may require updates here
-- moment is a peer dep — the consumer's installed moment instance is used (no bundled copy)
-- Moment.js is in maintenance mode; this package targets existing moment users, not new projects