New: 97,000+ skills indexed from GitHub repos with 100+ stars · every skill safety-checkedBrowse top skillsTop skills
Esc to closeBrowse all skills
Submit a skillBrowse skills
Submit a skillBrowse skills

Agent skill

Implement Spf Feature

by videojs in videojs/video.js

Implement an SPF feature from its registry entry. An agent skill from videojs/video.js.

Custom licenceAuto-check passed

Install Implement Spf Feature

skills CLI
$ npx skills add videojs/video.js --skill implement-spf-feature -a claude-code

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

GitHub CLI
$ gh skill install videojs/video.js implement-spf-feature --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/videojs/video.js.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/implement-spf-feature .claude/skills/implement-spf-feature && 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
implement-spf-feature
GitHub stars
40k
Token cost
~378 tokens
SKILL.md length
177 words
Files
2 (incl. references)
Skills in repo
38
Repo updated
First seen
Licence
Custom licence

At a glance

Implement an SPF feature from its registry entry. An agent skill from videojs/video.js.

  • Works in 6 steps: Read the entry, related features,… → List contradictions, open decisions, and… → Define the smallest end-to-end increment… → …
  • An engine capability spans behaviors and requires tests plus status updates
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Implement Spf Feature is an agent skill from videojs/video.js. Implement an SPF feature from its registry entry. Use when an engine capability spans behaviors and requires tests plus status updates.

Its SKILL.md is about 380 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/workflow.md`).

The repository describes itself as: Video.js v10 - open source media player framework for HTML and React.

When your agent uses it

  • An engine capability spans behaviors and requires tests plus status updates

Example prompts

  • “/implement-spf-feature”

Workflow steps

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

  1. Read the entry, related features, implementation, tests, and applicable SPF conventions.
  2. List contradictions, open decisions, and out-of-scope capability.
  3. Define the smallest end-to-end increment with observable value and split it into testable state, behavior, composition, adapter, and…
  4. For each chunk, add or update a failing test, implement the minimum at the correct ownership layer, and run the narrow target.
  5. Run cumulative SPF tests, build, and size checks proportional to impact.
  6. Collapse the feature record to final decisions, remaining scope, and current source pointers.

What it can do on your machine

Read from SKILL.md and the folder at commit 50f59a2. 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

Implement Spf Feature loads about 378 tokens when it runs, and up to ~13k if it reads all its reference files. Until then it costs about 39 tokens; SKILL.md has 177 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~39
When it runs · the whole SKILL.md, loaded when a task matches
~378
With references · SKILL.md plus every file in references/, read only if the agent opens them
~13k

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

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 177 words (~378 tokens).

“Read references/workflow.md completely before acting; it contains the detailed disambiguation, planning, implementation, testing, and registry-update workflow.”

— opening of SKILL.md by videojs, Custom licence
name
implement-spf-feature

Read the full SKILL.md on GitHub

Files

SKILL.md and 1 other file (references) in .agents/skills/implement-spf-feature of videojs/video.js.

  • SKILL.md
  • references/workflow.md

Open the folder on GitHubat commit 50f59a2

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders. This page covers the copy in videojs/video.js, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Implement Spf Feature 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.

Implement Spf Feature compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Implement Spf Feature this skillvideojs/video.js40k—~378Automated safety check: PassCustom licence
Implementing Dmarc Dkim Spf Email Securitymukul975/Anthropic-Cybersecurity-Skills34k—~1.1kAutomated safety check: PassApache-2.0
Implementsickn33/agentic-awesome-skills47k5 repos~306Automated safety check: PassMIT
Implementcodewhale-hq/Codewhale41k—~190Automated safety check: PassMIT
Incremental Implementationaddyosmani/agent-skills102k1 repos~2.3kAutomated safety check: PassMIT
Implementbestofjs/bestofjs3.1k18 repos~109Automated safety check: PassMIT

Similar skills

  • Implementing Dmarc Dkim Spf Email Security

    mukul975/Anthropic-Cybersecurity-Skills

    Configures SPF, DKIM, and DMARC DNS TXT records to authenticate outbound email, prevent domain spoofing, and enforce a rejection/quarantine policy on unauthenticated mail, including auditing a…

    34k GitHub stars~1.1k tokensUpdated 1 mo ago
    SecurityAuto-check passed

  • Implement

    sickn33/agentic-awesome-skills

    Implement a piece of work based on a PRD or set of issues. An agent skill from sickn33/agentic-awesome-skills.

    47k GitHub starsUsed in 5 repos~306 tokens
    Product & Project ManagementAuto-check passed

  • Implement

    codewhale-hq/Codewhale

    Carry an authorized, defined request or approved plan through scoped edits and proportionate verification.

    41k GitHub stars~190 tokensUpdated today
    Auto-check passed

  • Incremental Implementation

    addyosmani/agent-skills

    Delivers a change in thin vertical slices, each implemented, tested, verified and committed before the next, using vertical, contract-first or risk-first slicing.

    102k GitHub starsUsed in 1 repo~2.3k tokens
    Agent WorkflowsAuto-check passed

  • Implement

    bestofjs/bestofjs

    Implement a piece of work based on a spec or set of tickets.

    3.1k GitHub starsUsed in 18 repos~109 tokens
    Auto-check passed

  • Implement

    Automattic/simplenote-android

    End-to-end implementation workflow: plan, implement, verify, commit, and open a draft PR.

    1.9k GitHub stars~1.1k tokensUpdated 2 days ago
    Testing & QAAuto-check passed

More from videojs/video.js

All 38 skills in this repo

  • Commit PR

    videojs/video.js

    Commit, push, and create or update a Video.js pull request. An agent skill from videojs/video.js.

    40k GitHub stars~445 tokensUpdated today
    Auto-check passed

  • Maintain Tests

    videojs/video.js

    Gate and audit test value. An agent skill from videojs/video.js.

    40k GitHub stars~2.2k tokensUpdated today
    Auto-check passed

  • Write API Reference

    videojs/video.js

    Write generated Video.js API reference pages. An agent skill from videojs/video.js.

    40k GitHub stars~804 tokensUpdated today
    Auto-check passed

  • Write Docs

    videojs/video.js

    Write Video.js guides, concepts, READMEs, and JSDoc. An agent skill from videojs/video.js.

    40k GitHub stars~741 tokensUpdated today
    Auto-check passed

  • Write Locale Translations

    videojs/video.js

    Translate or audit the values in a Video.js locale pack. An agent skill from videojs/video.js.

    40k GitHub stars~723 tokensUpdated today
    Auto-check passed

  • Change Spf Behavior

    videojs/video.js

    Change SPF playback-engine behaviors. An agent skill from videojs/video.js.

    40k GitHub stars~451 tokensUpdated today
    Auto-check passed

Questions about Implement Spf Feature

What does Implement Spf Feature do?

Implement an SPF feature from its registry entry. An agent skill from videojs/video.js. js. Implement an SPF feature from its registry entry.

When should I use Implement Spf Feature?

Implement Spf Feature fits situations like: an engine capability spans behaviors and requires tests plus status updates.

How do I install Implement Spf Feature in Claude Code?

Run `npx skills add videojs/video.js --skill implement-spf-feature -a claude-code`. Or copy the skill folder (.agents/skills/implement-spf-feature in videojs/video.js) into .claude/skills/implement-spf-feature in your project. Claude Code loads it when a task matches its description.

How do I install Implement Spf Feature in Codex?

Run `npx skills add videojs/video.js --skill implement-spf-feature -a codex`. Or copy the skill folder (.agents/skills/implement-spf-feature in videojs/video.js) into .agents/skills/implement-spf-feature in your project. Codex loads it when a task matches its description.

Can I use Implement Spf Feature 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 videojs/video.js --skill implement-spf-feature -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/implement-spf-feature, .gemini/skills/implement-spf-feature, .github/skills/implement-spf-feature and .opencode/skills/implement-spf-feature in your project.

What does Implement Spf Feature need to run?

SKILL.md names no scripts, command-line tools or credentials: Implement Spf Feature is instructions for the agent only.

Does Implement Spf Feature 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 Implement Spf Feature 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 Implement Spf Feature use?

Implement Spf Feature has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Implement Spf Feature use?

About 378 tokens (SKILL.md is roughly 1.5k 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 13k tokens, read only when the agent opens those files.

What are the alternatives to Implement Spf Feature?

Skills that share tags, products or a category with Implement Spf Feature: Implementing Dmarc Dkim Spf Email Security (mukul975/Anthropic-Cybersecurity-Skills, 34k stars), Implement (sickn33/agentic-awesome-skills, 47k stars), Implement (codewhale-hq/Codewhale, 41k stars) and Incremental Implementation (addyosmani/agent-skills, 102k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Implement Spf Feature?

videojs (a GitHub organization) maintains it in videojs/video.js, which has 39,909 GitHub stars. The repository holds 38 skills in this directory. The repository was last updated on October 7, 2026.

Source: videojs/video.js on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.