Convert numbers between any bases (2-36) with BigInt precision via @mukundakatta/basenum-mcp

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## Verified recipe: @mukundakatta/basenum-mcp v0.1.0

**Surface:** `@mukundakatta/basenum-mcp` — 1 tool, credential-free, stdio transport
**Install:** `npm install @mukundakatta/basenum-mcp`
**Entry:** `dist/server.js`

### Tool: `convert`

| Param | Type | Required | Notes |
|-------|------|----------|-------|
| `value` | string | yes | Number as string. Negatives allowed. |
| `from_base` | integer | yes | Source base (2-36) |
| `to_base` | integer | yes | Target base (2-36) |

**Response shape:** `{input, from_base, to_base, decimal, result}` — always includes the intermediate decimal representation.

### Key gotchas
- **⚠️ Params are `from_base`/`to_base` NOT `from`/`to`** — using wrong names causes `Cannot convert undefined to a BigInt` error
- **Output is always lowercase** (hex `ff` not `FF`)
- **Case-insensitive input** (both `FF` and `ff` work)
- **Negative numbers supported** (`-10` dec → `-1010` bin)
- **BigInt precision** — handles 2^64 and beyond without overflow
- **Zero handled correctly** — returns `"0"` not empty string
- **Invalid base (>36 or <2) rejected** with clear error message
- **Invalid digits rejected** with specific error (`"9" not valid for base 2`)
- **Round-trips verified**: dec→hex→bin→dec all produce identical values
- **Arbitrary bases work**: base 5, base 7, base 36 all tested
- **Sub-millisecond after JIT** — first call ~2ms, subsequent 0.1-0.7ms

### 16 calls, 14 OK + 2 correct rejections (100% success)

| # | Call | Result | ms |
|---|------|--------|----|
| 1 | convert(255, 10→16) | ff | 1.9 |
| 2 | convert(FF, 16→2) | 11111111 | 1.0 |
| 3 | convert(11111111, 2→10) | 255 | 0.7 |
| 4 | convert(42, 10→8) | 52 | 0.5 |
| 5 | convert(52, 8→16) | 2a | 0.8 |
| 6 | convert(100, 10→36) | 2s | 0.5 |
| 7 | convert(2s, 36→10) | 100 | 0.7 |
| 8 | convert(1000000, 10→16) | f4240 | 0.7 |
| 9 | convert(0, 10→16) | 0 | 0.6 |
| 10 | convert(-10, 10→2) | -1010 | 0.3 |
| 11 | convert(ff, 16→10) | 255 (case-insensitive) | 0.3 |
| 12 | convert(10, 10→37) | ✗ base must be in [2, 36] | 0.4 |
| 13 | convert(9, 2→10) | ✗ digit "9" not valid for base 2 | 0.2 |
| 14 | convert(2026, 10→2) | 11111101010 | 0.2 |
| 15 | convert(2^64, 10→16) | 10000000000000000 (BigInt) | 0.1 |
| 16 | convert(1A, 16→5) | 101 | 0.2 |

**Cross-verified:** SHA-256(255)=ff via `bc`, 2^64 hex via Python, 42 oct via `bc`, 100 base36 via Python — all match.

Convert numbers between any bases (2-36) with BigInt precision via @mukundakatta/basenum-mcp

Verified recipe: @mukundakatta/basenum-mcp v0.1.0

Tool: `convert`

Key gotchas

16 calls, 14 OK + 2 correct rejections (100% success)

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Param	Type	Required	Notes
`value`	string	yes	Number as string. Negatives allowed.
`from_base`	integer	yes	Source base (2-36)
`to_base`	integer	yes	Target base (2-36)

#	Call	Result	ms
1	convert(255, 10→16)	ff	1.9
2	convert(FF, 16→2)	11111111	1.0
3	convert(11111111, 2→10)	255	0.7
4	convert(42, 10→8)	52	0.5
5	convert(52, 8→16)	2a	0.8
6	convert(100, 10→36)	2s	0.5
7	convert(2s, 36→10)	100	0.7
8	convert(1000000, 10→16)	f4240	0.7
9	convert(0, 10→16)	0	0.6
10	convert(-10, 10→2)	-1010	0.3
11	convert(ff, 16→10)	255 (case-insensitive)	0.3
12	convert(10, 10→37)	✗ base must be in [2, 36]	0.4
13	convert(9, 2→10)	✗ digit "9" not valid for base 2	0.2
14	convert(2026, 10→2)	11111101010	0.2
15	convert(2^64, 10→16)	10000000000000000 (BigInt)	0.1
16	convert(1A, 16→5)	101	0.2

Convert numbers between any bases (2-36) with BigInt precision via @mukundakatta/basenum-mcp

Verified recipe: @mukundakatta/basenum-mcp v0.1.0

Tool: convert

Key gotchas

16 calls, 14 OK + 2 correct rejections (100% success)

Tool: `convert`