Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add ntaffzii/Skill-Agents --skill thai-date-formatgit clone --depth 1 https://github.com/ntaffzii/Skill-AgentsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/ntaffzii/skill-agents/thai-date-format)<a href="https://agentmods.dev/skills/ntaffzii/skill-agents/thai-date-format"><img src="https://agentmods.dev/badge/skills/ntaffzii/skill-agents/thai-date-format.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00147 | $0.01282 |
| Opus 5 | $0.00073 | $0.00641 |
| Sonnet 5 | $0.00029 | $0.00256 |
| Haiku 4.5 | $0.00015 | $0.00128 |
Grade A, and why
thai-date-format scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 66 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Thai Date Format (พ.ศ. ↔ ค.ศ.)
Overview
Thai documents, forms, and casual writing use the Buddhist Era (พุทธศักราช, พ.ศ. = ค.ศ. + 543), not the Common Era Claude defaults to. A model without this skill routinely writes 2025 in a Thai government letter (should be ๒๕๖๘ or 2568), or converts a Thai year by guessing instead of the fixed +543 offset. This skill gives the exact offset, the three common display styles, and Thai numeral rendering.
When to use
- แปลงปี 2568 (พ.ศ.) เป็น ค.ศ., or the reverse
- เขียนวันที่แบบราชการ / business / casual ในเอกสารไทย
- Formatting a date for a Thai form, invoice, resume, or letter (often needed together with
thai-invoiceorthai-government-form) - Rendering a number using Thai digit glyphs (๐-๙), e.g. for a formal document or engraving
- Parsing a Thai-formatted date string back into a usable date value
When NOT to use
- The task is pure English/ISO date handling with no Thai era or numeral involved
- The task needs Thai lunar/astrological calendar dates (Thai solar calendar with BE offset is a different system from the lunar calendar used for Buddhist holy days) — flag this distinction to the user rather than guessing a lunar date
Core knowledge
-
Offset:
BE = CE + 543. Example: 2025 CE = 2568 BE. This is a fixed arithmetic offset for the modern calendar. -
Historical caveat: Thailand moved New Year's Day from 1 April to 1 January starting BE 2484 (1 Jan 1941 CE). For any date on or after 1 Jan 1941, the fixed
+543offset holds for the whole year. For dates before that, Jan-Mar fell in the previous BE year under the old calendar — this skill does not model that historical edge case; flag it if a user asks about a pre-1941 date. -
Display styles:
Style Example Where used Formal (ราชการ) 16 พฤษภาคม 2568Government letters, official documents, formal invitations Business 16 พ.ค. 68Invoices, receipts, business correspondence Casual 16/5/68Chat, informal notes, UI date pickers ISO/CE 2025-05-16Machine interchange, APIs, databases — never show this to a Thai reader as "the date" without conversion
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 7d ago First seen · 66 lines · 147 tokens per session scan A 17a9ddf65fb6
thai-date-format is a skill published in the GitHub repository ntaffzii/Skill-Agents (4 stars, last pushed 5d ago), licensed MIT. It adds 147 tokens to every session and 1,282 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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