Flags SDK
vercel/vercel-plugin
Set up and use feature flags and A/B tests with the Flags SDK (flags npm package) and Vercel Flags.
A skill your agent uses when writing the words on a single conversion page — the hero headline and subhead, the offer, the proof and testimonials, and one primary CTA — or diagnosing a page that…
$ npx skills add ericrisco/rsc-harness --skill landing-copy -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install ericrisco/rsc-harness landing-copy --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/ericrisco/rsc-harness.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/landing-copy .claude/skills/landing-copy && 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 "landing-copy" agent skill from https://github.com/ericrisco/rsc-harness/tree/main/skills/landing-copy into .claude/skills/landing-copy/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "landing-copy", 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/ericrisco/rsc-harness/tree/main/skills/landing-copyType 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 ericrisco/rsc-harness --skill landing-copy -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install ericrisco/rsc-harness landing-copy --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ericrisco/rsc-harness.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/landing-copy .agents/skills/landing-copy && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "landing-copy" agent skill from https://github.com/ericrisco/rsc-harness/tree/main/skills/landing-copy into .agents/skills/landing-copy/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "landing-copy", 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 ericrisco/rsc-harness --skill landing-copy -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install ericrisco/rsc-harness landing-copy --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ericrisco/rsc-harness.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/landing-copy .cursor/skills/landing-copy && 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 "landing-copy" agent skill from https://github.com/ericrisco/rsc-harness/tree/main/skills/landing-copy into .cursor/skills/landing-copy/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "landing-copy", 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/ericrisco/rsc-harness.git --path skills/landing-copy--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 ericrisco/rsc-harness --skill landing-copy -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install ericrisco/rsc-harness landing-copy --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ericrisco/rsc-harness.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/landing-copy .gemini/skills/landing-copy && 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 "landing-copy" agent skill from https://github.com/ericrisco/rsc-harness/tree/main/skills/landing-copy into .gemini/skills/landing-copy/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "landing-copy", 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 ericrisco/rsc-harness landing-copyInstalls 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 ericrisco/rsc-harness --skill landing-copy -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/ericrisco/rsc-harness.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/landing-copy .github/skills/landing-copy && 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 "landing-copy" agent skill from https://github.com/ericrisco/rsc-harness/tree/main/skills/landing-copy into .github/skills/landing-copy/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "landing-copy", 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 ericrisco/rsc-harness --skill landing-copy -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install ericrisco/rsc-harness landing-copy --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ericrisco/rsc-harness.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/landing-copy .opencode/skills/landing-copy && 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 "landing-copy" agent skill from https://github.com/ericrisco/rsc-harness/tree/main/skills/landing-copy into .opencode/skills/landing-copy/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "landing-copy", 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.
landing-copyA skill your agent uses when writing the words on a single conversion page — the hero headline and subhead, the offer, the proof and testimonials, and one primary CTA — or diagnosing a page that…
Landing Copy is an agent skill from ericrisco/rsc-harness. Use when writing the words on a single conversion page — the hero headline and subhead, the offer, the proof and testimonials, and one primary CTA — or diagnosing a page that gets traffic and does not convert, as a copy problem rather than a layout one. NOT the paid ad that drives the click (that is ads), NOT the visual layout the words sit in (that is design), NOT the experiment that picks the winning variant (that is ab-testing).
Its SKILL.md is about 2.8k tokens, which your agent loads only when the skill is triggered. The skill folder holds 8 other files, including scripts and reference files (for example `evals/README.md`, `evals/cases.yaml` and `references/frameworks.md`).
It sits in Marketing & SEO, covering A/B testing. It works with Next.js. The repository describes itself as: Your agent invents things because it has no memory, and can't touch your database because it has no arms. rsc is the meta-harness that gives it both, plus the trade to know the… The licence is MIT.
Read from SKILL.md and the folder at commit e3d5b33. It shows what the files ask for, not the result of running them.
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.
Ships 1 file in scripts/ (Shell), which the agent can run.
From the folder's file list and the shell code blocks in SKILL.md.
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Landing Copy loads about 2.8k tokens when it runs, and up to ~4.6k if it reads all its reference files. Until then it costs about 114 tokens; SKILL.md has 1,471 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.
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); the scripts in this folder are not scanned.
The full file from ericrisco/rsc-harness at commit e3d5b33, republished under its MIT licence (© ericrisco). 1,471 words, ~2,799 tokens.
.claude/skills/landing-copy/SKILL.md (or your agent's skills folder). This skill also uses 5 other files; get the full folder from GitHub.Hook, offer, proof, CTA. You write the words a visitor reads top to bottom; you do not draw the layout, build the page, or write the ad that sent them.
This skill owns conversion copy for a single page: a hero headline under ~8 words plus a benefit subhead, a top-to-bottom page skeleton, the offer stated as a benefit, proof slotted next to the ask, and one primary CTA repeated without competing. It is a copy job. The pixels are design's, the React/Next build is nextjs's, the ad that drives the click is ads's.
design (../design/SKILL.md).nextjs (../nextjs/SKILL.md) / react.ads.brand-voice.seo-geo.ab-testing.case-studies.marketing (../marketing/SKILL.md).Boundary in one line: you own the words that convert on one page; ads owns the click that arrives, design owns the layout they sit in, ab-testing owns the proof of which words win.
These numbers set expectations. State them as a band; the moment you promise a flat conversion rate you are lying to the user.
Every conversion page is these four jobs, top to bottom. Each has a distinct question, a home on the page, and a failure mode. Diagnose a dead page by finding which block is weak.
| Block | Must answer | Lives where | Failure mode if weak |
|---|---|---|---|
| Hook | "What is this and why should I care?" in <5s | Hero, above the fold | Visitor bounces before scrolling; ~80% never see the rest |
| Offer | "What exactly do I get, and what does it cost me?" | Right after the hook / problem | Feature dump; reader can't tell what they walk away with |
| Proof | "Why should I believe you?" | Adjacent to each CTA | Claims read as marketing; trust never forms |
| CTA | "What is the one thing to do next?" | Hero, repeated down the page | Competing asks → decision fatigue → no click |
The H1 carries the what; the subhead carries the benefit; both must echo whatever the visitor clicked.
ads.Bad — "Reimagine The Future Of Financial Operations" (clever, 6 words, says nothing)
Good — "Expense reports done in 30 seconds" (clear, 5 words, names the outcome)
Subhead: For finance teams drowning in receipts — snap, submit, approved.Name the thing, the outcome, and the cost in effort or money. Lead with the outcome the buyer gets, then the mechanism that delivers it. This feature→benefit transform is the highest-impact copy shift on most pages.
The scaffold is FAB — Feature → Advantage → Benefit — but you stop at the benefit the reader cares about and back it with the mechanism as proof, not the other way round.
Bad — "Our platform has advanced AES-256 encryption."
Good — "Protect customer data with AES-256 encryption, so your security team
signs off in days, not months."Rule: every feature line answers "so what?" with an outcome. If it can't, cut it.
Belief is built next to the ask, not in a wall of quotes elsewhere.
[[NEEDS PROOF]] and ask the user — do not invent it.Bad — "Loved by teams everywhere. World-class results!"
Good — "We cut expense-report time 82% in the first month."
— Maria Ortiz, CFO, Lumen (47-person finance team)One primary action, verb-led, repeated — not varied — down the page.
Bad buttons — [Submit] [Learn more] [Contact sales]
Good buttons — [Start my free trial] ...repeated... [Start my free trial]
under it: No credit card. Cancel anytime.These are skeletons to fill with the buyer's actual language, not fill-in templates:
Common stack: PAS/AIDA hook → FAB offer → proof → CTA. How much you agitate the problem before the offer depends on traffic temperature (cold needs more, warm goes straight to the offer). Full explanations with fresh examples and the awareness-stage note → references/frameworks.md.
| Rationalization | Reality / Fix |
|---|---|
| "A clever headline will stand out" | Clever is unclear. Name the outcome in <8 words; clear beats clever. |
| "More features = more value shown" | Feature dumps bury the benefit. Lead with the outcome, then the mechanism. |
| "Give them several CTAs to choose from" | Choice kills conversion. One primary action, repeated, not varied. |
| "Any testimonials will do" | Generic raves don't persuade. 3–5 named quotes with a hard result, near the CTA. |
| "World-class, cutting-edge, game-changing" | Hype words signal AI-template copy. Replace with a number or a named result. |
| "The page can say its own thing" | If the headline ignores the ad's promise, you lose the message-match lift. Echo the click. |
| "Promise them a 12% conversion rate" | Never promise a flat number. Quote the band for their vertical. |
| "I'll invent a plausible metric" | Never. Mark [[NEEDS PROOF]] and ask the user. |
The annotated top-to-bottom skeleton (hook → problem → offer → proof → CTA → objections/FAQ → final CTA), with one fully worked B2B SaaS example and the variable slots marked, lives in references/page-skeleton.md. Start there when you write a full page rather than a single block.
Run scripts/verify.sh over the file you wrote (or your project) before claiming done. It is a read-only, dependency-free static check: H1 length, exactly one primary CTA verb (flags competing asks), presence of a proof block and a benefit subhead, a banlist of hype/AI-tell phrases, and a "Submit" warning. It warns on soft issues and exits non-zero only on hard ones (no CTA, no proof). It is a backstop, not the judgement — the four-block table is.
../design/SKILL.md — the pixels: layout, hierarchy, the visual system the words sit in.../nextjs/SKILL.md — the build: rendering the page in code.../marketing/SKILL.md — the broader campaign: email sequences, channels, launch arc.ads — the paid ad copy that drives the click (route here; you only match the page to it).ab-testing — the experiment that proves which headline/CTA wins.case-studies · brand-voice · seo-geo — the proof asset, the voice rules, the search layer.references/frameworks.md, references/page-skeleton.md.© ericrisco, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
SKILL.md and 5 other files (scripts, references) in skills/landing-copy of ericrisco/rsc-harness.
Open the folder on GitHubat commit e3d5b33
Landing Copy 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 |
|---|---|---|---|---|---|---|
| Landing Copy this skillericrisco/rsc-harness | 174 | — | ~2.8k | Automated safety check: Pass | MIT | |
| Flags SDKvercel/vercel-plugin | 301 | — | ~6.9k | Automated safety check: Notes | Custom licence | |
| Ab Testingcoreyhaines31/marketingskills | 54k | 3 repos | ~3.1k | Automated safety check: Pass | MIT | |
| AnalyticsNexus-JPF/note-companion | 870 | 7 repos | ~2.2k | Automated safety check: Pass | MIT | |
| Ad Test Designeraaron-he-zhu/aaron-marketing-skills | 2.9k | 2 repos | ~2.8k | Automated safety check: Pass | Apache-2.0 | |
| Ab Test Analyzeririnabuht12-oss/marketing-skills | 4k | — | ~1.4k | Automated safety check: Pass | None |
vercel/vercel-plugin
Set up and use feature flags and A/B tests with the Flags SDK (flags npm package) and Vercel Flags.
coreyhaines31/marketingskills
When the user wants to plan, design, or implement an A/B test or experiment, or build a growth experimentation program.
Nexus-JPF/note-companion
When the user wants to set up, improve, or audit analytics tracking and measurement.
aaron-he-zhu/aaron-marketing-skills
A skill your agent uses when the user asks to "design an A/B test", "set up a creative/landing test", "run an incrementality test", or "is this result statistically and practically material?"…
irinabuht12-oss/marketing-skills
Statistical significance calculator for A/B test results with sample size requirements, segment breakdowns, and hypothesis generation.
appeeky/aso-skills
When the user wants to A/B test App Store product page elements to improve conversion rate.
ericrisco/rsc-harness
A skill your agent uses when designing or analyzing a controlled experiment — falsifiable hypothesis, sample size from an MDE, reading significance/CI/power, CUPED, or rescuing tests that won't go…
ericrisco/rsc-harness
A skill your agent uses when making a web UI conform to WCAG 2.2 Level AA — axe-core or Lighthouse a11y violations, keyboard operability, focus management, ARIA roles/names/live regions, contrast…
ericrisco/rsc-harness
A skill your agent uses when running or fixing paid acquisition on Google or Meta — campaign structure (Performance Max, Demand Gen, Search, Advantage+), platform-fit creative, budget/scaling rules…
ericrisco/rsc-harness
A skill your agent uses when measuring whether an LLM or agent system actually got better and gating merges on it: golden sets, fixing an inflated LLM-as-judge, scoring RAG (faithfulness, contextual…
ericrisco/rsc-harness
A skill your agent uses when a creative goal must become a finished media file: pick and order generative-media models per modality — AI voiceover, image-to-video clips, score — then glue them with…
ericrisco/rsc-harness
A skill your agent uses when instrumenting product or web analytics — GA4/PostHog SDK wiring, event taxonomy, funnels, double-counted events, consent gating, PII scrubbing.
Works with
Categories
A skill your agent uses when writing the words on a single conversion page — the hero headline and subhead, the offer, the proof and testimonials, and one primary CTA — or diagnosing a page that…. Landing Copy is an agent skill from ericrisco/rsc-harness. Use when writing the words on a single conversion page — the hero headline and subhead, the offer, the proof and testimonials, and one primary CTA — or diagnosing a page that gets traffic and does not convert, as a copy problem rather than a layout one.
Landing Copy fits situations like: writing the words on a single conversion page — the hero headline and subhead; the proof and testimonials; one primary CTA —; diagnosing a page that gets traffic and does not convert.
Run `npx skills add ericrisco/rsc-harness --skill landing-copy -a claude-code`. Or copy the skill folder (skills/landing-copy in ericrisco/rsc-harness) into .claude/skills/landing-copy in your project. Claude Code loads it when a task matches its description.
Run `npx skills add ericrisco/rsc-harness --skill landing-copy -a codex`. Or copy the skill folder (skills/landing-copy in ericrisco/rsc-harness) into .agents/skills/landing-copy in your project. Codex loads it when a task matches its description.
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add ericrisco/rsc-harness --skill landing-copy -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/landing-copy, .gemini/skills/landing-copy, .github/skills/landing-copy and .opencode/skills/landing-copy in your project.
Going by SKILL.md and its folder, Landing Copy needs a shell for the scripts in its folder. Our summary lists: A Bash shell.
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.
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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
Landing Copy is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
About 2.8k tokens (SKILL.md is roughly 11k 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.
Skills that share tags, products or a category with Landing Copy: Flags SDK (vercel/vercel-plugin, 301 stars), Ab Testing (coreyhaines31/marketingskills, 54k stars), Analytics (Nexus-JPF/note-companion, 870 stars) and Ad Test Designer (aaron-he-zhu/aaron-marketing-skills, 2.9k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
ericrisco (a GitHub user) maintains it in ericrisco/rsc-harness, which has 174 GitHub stars. The repository holds 233 skills in this directory. The repository was last updated on October 7, 2026.
Source: ericrisco/rsc-harness on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.