Speculative Naming
sgl-project/sglang
Naming conventions for SGLang speculative decoding identifiers.
A skill your agent uses when optimising multi-page navigation performance, reducing INP on page transitions, or implementing progressive enhancement for fast page loads.
MITAuto-check passed
Install Speculation Rules
$ npx skills add thedaviddias/Front-End-Checklist --skill speculation-rules -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install thedaviddias/Front-End-Checklist speculation-rules --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/speculation-rules .claude/skills/speculation-rules && rm -rf skills-srcUse ~/.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/
Install the "speculation-rules" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/speculation-rules into .claude/skills/speculation-rules/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "speculation-rules", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/speculation-rulesType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add thedaviddias/Front-End-Checklist --skill speculation-rules -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install thedaviddias/Front-End-Checklist speculation-rules --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/speculation-rules .agents/skills/speculation-rules && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "speculation-rules" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/speculation-rules into .agents/skills/speculation-rules/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "speculation-rules", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add thedaviddias/Front-End-Checklist --skill speculation-rules -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install thedaviddias/Front-End-Checklist speculation-rules --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/speculation-rules .cursor/skills/speculation-rules && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "speculation-rules" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/speculation-rules into .cursor/skills/speculation-rules/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "speculation-rules", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/thedaviddias/Front-End-Checklist.git --path skills/speculation-rules--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add thedaviddias/Front-End-Checklist --skill speculation-rules -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install thedaviddias/Front-End-Checklist speculation-rules --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/speculation-rules .gemini/skills/speculation-rules && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "speculation-rules" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/speculation-rules into .gemini/skills/speculation-rules/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "speculation-rules", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install thedaviddias/Front-End-Checklist speculation-rulesInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add thedaviddias/Front-End-Checklist --skill speculation-rules -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/speculation-rules .github/skills/speculation-rules && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "speculation-rules" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/speculation-rules into .github/skills/speculation-rules/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "speculation-rules", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add thedaviddias/Front-End-Checklist --skill speculation-rules -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install thedaviddias/Front-End-Checklist speculation-rules --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/speculation-rules .opencode/skills/speculation-rules && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "speculation-rules" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/speculation-rules into .opencode/skills/speculation-rules/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "speculation-rules", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
speculation-rules- GitHub stars
- 74k
- Token cost
- ~509 tokens
- SKILL.md length
- 219 words
- Files
- 2 (incl. references)
- Skills in repo
- 390
- Repo updated
- First seen
- Licence
- MIT
At a glance
A skill your agent uses when optimising multi-page navigation performance, reducing INP on page transitions, or implementing progressive enhancement for fast page loads.
- Optimising multi-page navigation performance
- SKILL.md covers Quick Reference, Check, Fix and Explain, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Reducing INP on page transitions
What it does
Speculation Rules is an agent skill from thedaviddias/Front-End-Checklist. Use when optimising multi-page navigation performance, reducing INP on page transitions, or implementing progressive enhancement for fast page loads.
Its SKILL.md is about 510 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/rule.md`).
The repository describes itself as: 🗂 The essential checklist for modern web development, for humans and AI agents. The licence is MIT.
When your agent uses it
- Optimising multi-page navigation performance
- Reducing INP on page transitions
- Implementing progressive enhancement for fast page loads
Example prompts
- “/speculation-rules”
What it can do on your machine
Read from SKILL.md and the folder at commit e8d14d0. 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
Links to these hosts (documentation or services it may open):
frontendchecklist.io
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
Speculation Rules loads about 509 tokens when it runs, and up to ~2.4k if it reads all its reference files. Until then it costs about 42 tokens; SKILL.md has 219 words of instructions outside code blocks.
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 thedaviddias/Front-End-Checklist at commit e8d14d0, republished under its MIT licence (© thedaviddias). 219 words, ~509 tokens.
Download SKILL.mdSave it as
.claude/skills/speculation-rules/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- speculation-rules
- description
- Use when optimising multi-page navigation performance, reducing INP on page transitions, or implementing progressive enhancement for fast page loads.
- metadata.category
- performance
- metadata.priority
- low
- metadata.difficulty
- intermediate
- metadata.estimatedTime
- 20
- metadata.source
- frontendchecklist.io
- metadata.url
- https://frontendchecklist.io/rules/performance/speculation-rules
Use the Speculation Rules API to prefetch and prerender navigations
Navigation latency is one of the biggest contributors to poor Interaction to Next Paint (INP) and overall perceived performance. Prerendering the most likely next page eliminates all network and rendering latency — the user sees the new page in under 100 ms regardless of server response time. Google Search has used this API to deliver its "instant" results page experience.
Quick Reference
- Use prefetch rules to load the next page's HTML ahead of time
- Use prerender rules to fully render the next page in the background (instant navigation)
- Scope rules with href-matches or CSS selector patterns to avoid wasting bandwidth
- Prefer document rules (CSS selectors) over URL list rules for dynamic sites
Check
Check whether the site uses the Speculation Rules API or equivalent prefetch/prerender techniques for likely navigation targets.
Fix
Add a Speculation Rules JSON block targeting the most likely next-page links, starting with prefetch and graduating to prerender.
Explain
Explain how the Speculation Rules API differs from rel=prefetch and rel=prerender, and how prerendering achieves near-zero navigation latency.
Code Review
Review speculation rule selectors for over-eagerness — flag patterns that would prerender unrelated pages, third-party URLs, or pages with personalised/authenticated content that should not be pre-fetched.
For full implementation details, code examples, and framework-specific guidance,
see references/rule.md.
Rule page: https://frontendchecklist.io/rules/performance/speculation-rules
© thedaviddias, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file (references) in skills/speculation-rules of thedaviddias/Front-End-Checklist.
- SKILL.md
- references/rule.md
Open the folder on GitHubat commit e8d14d0
Compare with similar skills
Speculation Rules 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Speculation Rules this skillthedaviddias/Front-End-Checklist | 74k | — | ~509 | Automated safety check: Pass | MIT | |
| Speculative Namingsgl-project/sglang | 37k | 2 repos | ~1.6k | Automated safety check: Pass | Apache-2.0 | |
| Monorepo Navigatoralirezarezvani/claude-skills | 28k | 1 repos | ~1.2k | Automated safety check: Pass | MIT | |
| Ios26 Navigationwix/react-native-navigation | 13k | — | ~8.3k | Automated safety check: Pass | MIT | |
| Langfuse Codebase Navigatorlangfuse/langfuse | 36k | — | ~1.4k | Automated safety check: Pass | Custom licence | |
| Speculative DecodingOrchestra-Research/AI-Research-SKILLs | 13k | 3 repos | ~3.5k | Automated safety check: Pass | MIT |
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Questions about Speculation Rules
What does Speculation Rules do?
A skill your agent uses when optimising multi-page navigation performance, reducing INP on page transitions, or implementing progressive enhancement for fast page loads. Speculation Rules is an agent skill from thedaviddias/Front-End-Checklist. Use when optimising multi-page navigation performance, reducing INP on page transitions, or implementing progressive enhancement for fast page loads.
When should I use Speculation Rules?
Speculation Rules fits situations like: optimising multi-page navigation performance; reducing INP on page transitions; implementing progressive enhancement for fast page loads.
How do I install Speculation Rules in Claude Code?
Run `npx skills add thedaviddias/Front-End-Checklist --skill speculation-rules -a claude-code`. Or copy the skill folder (skills/speculation-rules in thedaviddias/Front-End-Checklist) into .claude/skills/speculation-rules in your project. Claude Code loads it when a task matches its description.
How do I install Speculation Rules in Codex?
Run `npx skills add thedaviddias/Front-End-Checklist --skill speculation-rules -a codex`. Or copy the skill folder (skills/speculation-rules in thedaviddias/Front-End-Checklist) into .agents/skills/speculation-rules in your project. Codex loads it when a task matches its description.
Can I use Speculation Rules 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 thedaviddias/Front-End-Checklist --skill speculation-rules -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/speculation-rules, .gemini/skills/speculation-rules, .github/skills/speculation-rules and .opencode/skills/speculation-rules in your project.
What does Speculation Rules need to run?
SKILL.md names no scripts, command-line tools or credentials: Speculation Rules is instructions for the agent only.
Does Speculation Rules access the network?
SKILL.md names 1 domain. As links in the text: frontendchecklist.io. This is read from the text; nothing was executed.
Is Speculation Rules 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 Speculation Rules use?
Speculation Rules is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Speculation Rules use?
About 509 tokens (SKILL.md is roughly 2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 1.8k tokens, read only when the agent opens those files.
What are the alternatives to Speculation Rules?
Skills that share tags, products or a category with Speculation Rules: Speculative Naming (sgl-project/sglang, 37k stars), Monorepo Navigator (alirezarezvani/claude-skills, 28k stars), Ios26 Navigation (wix/react-native-navigation, 13k stars) and Langfuse Codebase Navigator (langfuse/langfuse, 36k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Speculation Rules?
thedaviddias (a GitHub user) maintains it in thedaviddias/Front-End-Checklist, which has 74,398 GitHub stars. The repository holds 390 skills in this directory. The repository was last updated on October 6, 2026.
Source: thedaviddias/Front-End-Checklist on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.