---
name: tsl-api-reference
description: "Use when writing or reviewing TSL code and needing authoritative TSL API facts: builtin/dotnet functions, module APIs, exact signatures, parameters, return values, examples, or Chinese keyword discovery when the function name is unknown."
---

# TSL API Reference

Use this skill for TSL API facts only: function/module names, exact signatures,
parameters, return values, and examples. For TSL syntax, control flow, variables,
object model, or runtime language rules, use the `tsl-syntax-reference` skill instead.

Do not infer API signatures from memory or similar languages. TSL names are
case-insensitive, but underscores are significant: do not remove underscores or
camel-case names when querying or reporting APIs.

Run the bundled lookup script. Replace `<this-skill-dir>` with the directory
containing this `SKILL.md`.

- Known API name:

  ```bash
  python <this-skill-dir>/scripts/lookup.py --name argmax
  ```

- Unknown name, known behavior or Chinese keywords:

  ```bash
  python <this-skill-dir>/scripts/lookup.py --kw 数组 排序
  ```

- Keyword terms use AND semantics; add terms to narrow results.
- Use `--limit N` to change how many candidate rows are printed.

Exact lookup prints the full entry body and source marker. Keyword lookup prints
candidate rows; pick a candidate, then rerun exact lookup with `--name`.

If exact lookup has no match, retry with Chinese keywords. If bundled data is
missing, reinstall the skill.