---
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 language docs 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.
