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smcllnssmcllns/skills/token-count/SKILL.md

token-count

Skill0 starsChanged 5 months agoMITView on GitHub

Use when you need a free, accurate token count across Anthropic/Gemini/OpenAI for prompt budgeting, skill sizing, or annotating file references. Returns per-vendor counts and a range string.

The file

We split this skill into the rules it gives an agent

1 rule. About 0 are common, 1 is distinctive, and 0 are very specific to this project.

  • ≈0

    Common · estimate

    Many files like this have a rule of this kind.

  • ≈1

    Distinctive · estimate

    This author's own choices. Worth a look.

  • 0

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Distinctive:

    Call all three server-side count endpoints (no inference, free), then return a structured result.

    line 8

≈ “Common” is an estimate: at least 1 in 5 of the 350,495 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

Token count

Call all three server-side count endpoints (no inference, free), then return a structured result.

  • Anthropic — POST https://api.anthropic.com/v1/messages/count_tokens (x-api-key)
  • Gemini — POST https://generativelanguage.googleapis.com/v1beta/models/{model}:countTokens (API key)
  • OpenAI — POST https://api.openai.com/v1/responses/input_tokens (Bearer)

Tokenizer is vendor-fixed; model only selects family. Use any current model per vendor (e.g. claude-sonnet-4-6, gemini-2.5-flash, gpt-5).

Output

Return a JSON object:

{
  "counts": { "anthropic": 1234, "gemini": 1200, "openai": 1300 },
  "range": "1,200–1,300 tokens"
}
  • range — smallest–largest, comma-formatted, suffixed tokens

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Your trail

Files you open will collect here, so you can find them again.

Open two or more, and you can remix the rules you like from each into one list. Kept in this browser only.

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