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Agent skill

Scripted Runtime Notes

by sgl-project in sgl-project/sglang

Requirements for the SGLang scripted runtime, chiefly when to add (vs not add) a harness API.

Apache-2.0Auto-check passedAI & LLM Engineering

Install Scripted Runtime Notes

skills CLI
$ npx skills add sgl-project/sglang --skill scripted-runtime-notes -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install sgl-project/sglang scripted-runtime-notes --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/sgl-project/sglang.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/scripted-runtime-notes .claude/skills/scripted-runtime-notes && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
scripted-runtime-notes
GitHub stars
37k
Used in
2 other repos
Token cost
~448 tokens
SKILL.md length
204 words
Files
1
Skills in repo
31
Repo updated
First seen
Licence
Apache-2.0

At a glance

Requirements for the SGLang scripted runtime, chiefly when to add (vs not add) a harness API.

  • Works in 3 steps: Control primitive — drives the engine… → Hook-backed — value cannot be read from… → Multi-structure derivation, widely…
  • Anything related to the scripted runtime
  • SKILL.md covers When to Add an API and Other Tips
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Scripted Runtime Notes is an agent skill from sgl-project/sglang. Requirements for the SGLang scripted runtime, chiefly when to add (vs not add) a harness API. Use for anything related to the scripted runtime.

Its SKILL.md is about 450 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in AI & LLM Engineering. It works with SGLang. The repository describes itself as: SGLang is a high-performance serving framework for large language models and multimodal models. The licence is Apache-2.0.

When your agent uses it

  • Anything related to the scripted runtime

Example prompts

  • “Use the scripted-runtime-notes skill to requirement for the SGLang scripted runtime, chiefly when to add (vs not add) a harness API”
  • “/scripted-runtime-notes”

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

  1. Control primitive — drives the engine through a real path (start_req, pause_generation, abort, evict_radix, exhaust_kv). Reuse the real…
  2. Hook-backed — value cannot be read from a snapshot; accumulate via scheduler_hook.on_run_batch or the recv proxy (chunks_done). Read-only…
  3. Multi-structure derivation, widely reused — scans chunked_req + waiting_queue + running_batch + last_batch (is_idle, status…

What it can do on your machine

Read from SKILL.md and the folder at commit 1c42ad3. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Scripted Runtime Notes loads about 448 tokens when it runs. Until then it costs about 42 tokens; SKILL.md has 204 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~42
When it runs · the whole SKILL.md, loaded when a task matches
~448

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from sgl-project/sglang at commit 1c42ad3, republished under its Apache-2.0 licence (© sgl-project). 204 words, ~448 tokens.

Download SKILL.mdSave it as .claude/skills/scripted-runtime-notes/SKILL.md (or your agent's skills folder).
name
scripted-runtime-notes
description
Requirements for the SGLang scripted runtime, chiefly when to add (vs not add) a harness API. Use for anything related to the scripted runtime.

Scripted Runtime — Notes

Notes for anything related to the SGLang scripted runtime.

When to Add an API

Tests read r.req.* and t._scheduler.* directly — there is no encapsulation boundary. A thin wrapper buys zero isolation; it only grows the surface.

Add an API only if it does real work:

  1. Control primitive — drives the engine through a real path (start_req, pause_generation, abort, evict_radix, exhaust_kv). Reuse the real path; never hand-mutate state.
  2. Hook-backed — value cannot be read from a snapshot; accumulate via scheduler_hook.on_run_batch or the recv proxy (chunks_done). Read-only; never monkey-patch; never add *_count to srt/.
  3. Multi-structure derivation, widely reused — scans chunked_req + waiting_queue + running_batch + last_batch (is_idle, status, batch_composition).

Else: don't. Read r.req.X / t._scheduler.X in the test; inline single-use accessors.

Never:

  • Weaken an assertion to fit a missing probe.
  • Probe implementation details ("field non-None", "which branch ran") — assert the consequence.

Other Tips

  • Engine-self-driven behavior: drive the real loop, don't call the private. Never synchronously call a scheduler private (e.g. scheduler._abort_on_waiting_timeout()) from the harness/test — it runs at the wrong loop phase, bypasses the ordered recv_requests → process_input_requests injection, and can fire in states the real loop never reaches (e.g. while paused). For sweeps the engine runs itself (timeout/idle), enable the config/env and advance the loop with yield.

© sgl-project, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .agents/skills/scripted-runtime-notes of sgl-project/sglang.

Open the folder on GitHubat commit 1c42ad3

Used in 2 other repositories

We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 2 other GitHub owners. This page covers the copy in sgl-project/sglang, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Scripted Runtime Notes next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Scripted Runtime Notes compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Scripted Runtime Notes this skillsgl-project/sglang37k2 repos~448Automated safety check: PassApache-2.0
SageMaker Serving Image Selectionhuggingface/skills11k1 repos~4.6kAutomated safety check: PassApache-2.0
Clean Startup Logguqiong96/Lsglang1431 repos~4.5kAutomated safety check: PassApache-2.0
Gptqmodel Tokenizer NormalizationModelCloud/GPTQModel1.3k—~1.1kAutomated safety check: PassCustom licence
slime RL Post-TrainingOrchestra-Research/AI-Research-SKILLs13k5 repos~2.8kAutomated safety check: PassMIT
SGLang Structured ServingOrchestra-Research/AI-Research-SKILLs13k3 repos~2.9kAutomated safety check: PassMIT

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Works with

Categories

Questions about Scripted Runtime Notes

What does Scripted Runtime Notes do?

Requirements for the SGLang scripted runtime, chiefly when to add (vs not add) a harness API. Scripted Runtime Notes is an agent skill from sgl-project/sglang. Requirements for the SGLang scripted runtime, chiefly when to add (vs not add) a harness API.

When should I use Scripted Runtime Notes?

Scripted Runtime Notes fits situations like: anything related to the scripted runtime.

How do I install Scripted Runtime Notes in Claude Code?

Run `npx skills add sgl-project/sglang --skill scripted-runtime-notes -a claude-code`. Or copy the skill folder (.agents/skills/scripted-runtime-notes in sgl-project/sglang) into .claude/skills/scripted-runtime-notes in your project. Claude Code loads it when a task matches its description.

How do I install Scripted Runtime Notes in Codex?

Run `npx skills add sgl-project/sglang --skill scripted-runtime-notes -a codex`. Or copy the skill folder (.agents/skills/scripted-runtime-notes in sgl-project/sglang) into .agents/skills/scripted-runtime-notes in your project. Codex loads it when a task matches its description.

Can I use Scripted Runtime Notes in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add sgl-project/sglang --skill scripted-runtime-notes -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/scripted-runtime-notes, .gemini/skills/scripted-runtime-notes, .github/skills/scripted-runtime-notes and .opencode/skills/scripted-runtime-notes in your project.

What does Scripted Runtime Notes need to run?

SKILL.md names no scripts, command-line tools or credentials: Scripted Runtime Notes is instructions for the agent only.

Does Scripted Runtime Notes access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Scripted Runtime Notes safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Scripted Runtime Notes use?

Scripted Runtime Notes is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Scripted Runtime Notes use?

About 448 tokens (SKILL.md is roughly 1.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Scripted Runtime Notes?

Skills that share tags, products or a category with Scripted Runtime Notes: SageMaker Serving Image Selection (huggingface/skills, 11k stars), Clean Startup Log (guqiong96/Lsglang, 143 stars), Gptqmodel Tokenizer Normalization (ModelCloud/GPTQModel, 1.3k stars) and slime RL Post-Training (Orchestra-Research/AI-Research-SKILLs, 13k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Scripted Runtime Notes?

sgl-project (a GitHub organization) maintains it in sgl-project/sglang, which has 36,829 GitHub stars. The repository holds 31 skills in this directory. The repository was last updated on October 7, 2026.

Source: sgl-project/sglang on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.