Agent skill

gt-list-building

GT List Building — expert B2B list building for outbound sales campaigns.

activeReaches the webInstructions only426 words

Filed under Prospecting and list building.

From Growth-Today/claude-skills · 16 skill entries · 4 · pushed 2026-09-16

What it does when it runs

GT List Building — expert B2B list building for outbound sales campaigns. Use when asking about building lead lists, Sales Navigator search, boolean filters, ICP definition, ICP scoring, lead sources, data validation, email verification, list segmentation, Apollo prospecting, Clay Find People, list hygiene, deduplication, account qualification, ABM lists, or assembling prospect lists for cold outreach. Triggers on: lead list, list building, Sales Navigator, boolean search, ICP, ideal customer profile, find leads, prospect list, lead source, email verification, data validation, list hygiene, Evaboot, PhantomBuster, export leads, build a list, find prospects, deduplicate, qualify accounts, ABM. Do NOT use for enrichment workflows (use gt-clay) or email writing (use gt-copywriting).

Automated analysis of the skill and the 17 files bundled beside it. A skill’s own description is written to be selected by an agent, so it describes the job and not the dependencies.

Keys and connectors you must supply: None found.
Hosts it reaches: chromewebstore.google.com
openmart.ai
www.clay.com
Tool permissions it declares: No allowed-tools in the frontmatter. It only issues instructions, so there is nothing to bound.
Actions present in the files: None. Instructions only.

Our read

Computed from the artifact. Nothing here has been run, so none of it is a claim about how well the skill works — only about what it is and what it needs.

Maintenanceactive

Pushed within the last 30 days, with commits in the last 90.

CouplingReaches the web

Reaches a third-party host at runtime, but needs no key of its own.

Blast radiusInstructions only

No shell, no file writes, no network calls in the skill or its bundled files.

What it does to your systemsUnreviewed

The reading was not confident enough, or not yet confirmed, to publish.

Sends messages: No step found in the source
Writes records: No step found in the source
Spends credits: Unreviewed
Needs credentials: No key or connector found by pattern match

Also names Apollo.io without operating it here; the links compare what other skills do with each tool.

Read from source, not tested by running. Machine-read from SKILL.md at commit d0efd28 with jev-1.13.0; labels that write, send or spend were also checked against the cited line by a second reviewer. How this is read

Substancebrief

Under 600 words, no bundled reference files.

LicenceMIT

Permits redistribution with attribution, per the repository.

Ask about gt-list-building

Opens your assistant with this page's verified links already in the prompt.

Is this safe to install?Claude ChatGPT

Adapt it to my stackClaude ChatGPT

What else do I need for it to workClaude ChatGPT

Rather ask a human? Talk to Cheetah

Install it

View source on GitHub ↗

git clone --depth 1 --filter=blob:none --sparse https://github.com/Growth-Today/claude-skills.git /tmp/claude-skills
git -C /tmp/claude-skills sparse-checkout set "gt-list-building"
mkdir -p ~/.claude/skills/gt-list-building
cp -R "/tmp/claude-skills/gt-list-building/." ~/.claude/skills/gt-list-building/

Picked up without a restart. A project skill of the same name is shadowed by your personal one. For one repository only, swap ~/.claude/skills for .claude/skills. Claude Code docs ↗

The folder is the same in every client that implements the format — 46 of them — so if yours is not above, only the destination changes.

The skill

Source on GitHub ↗

Reproduced in full from Growth-Today/claude-skills/blob/d0efd280016fa8202e2a793561ed965d1b177568/gt-list-building/SKILL.md, which is licensed MIT (repository). 426 words, 6 headings.

GT List Building — Master Orchestrator

Expert B2B list builder for campaigns sending 100K+ cold emails per month.

Sub-Skill Routing

User Intent	Load
Define target audience, scoring criteria, ICP, firmographic	`resources/sub-skills/icp-definition.md`
Find target companies from data sources	`resources/sub-skills/company-sourcing.md`
Find contacts/people at companies, boolean search, Sales Navigator	`resources/sub-skills/contact-discovery.md`
Score and qualify accounts, ABM tiers, intent data, lookalikes	`resources/sub-skills/account-qualification.md`
Verify emails/phones, bounce rates, list hygiene	`resources/sub-skills/email-validation.md`
Remove duplicates, merge data sources	`resources/sub-skills/deduplication.md`
ABM account selection, revenue reverse-engineering, how many accounts	`resources/sub-skills/account-selection.md`
Buying committee mapping, persona-based messaging, champion vs buyer	`resources/sub-skills/persona-mapping.md`

Decision Flow

User Request
    ├─ Defining WHO to target? ---------> icp-definition
    ├─ Finding COMPANIES? --------------> company-sourcing
    ├─ Finding PEOPLE/CONTACTS? --------> contact-discovery
    ├─ Scoring/qualifying ACCOUNTS? ----> account-qualification
    ├─ Verifying/cleaning DATA? --------> email-validation
    ├─ Removing DUPLICATES? ------------> deduplicate
    ├─ ABM account selection/sizing? ---> account-selection
    ├─ Buying committee/personas? ------> persona-mapping
    └─ Full workflow / "build me a list"?
        ├─ Beginner? → resources/templates/beginner-workflow.md
        ├─ Advanced? → chain: icp-definition → company-sourcing → contact-discovery → account-qualification → email-validation → deduplication
        └─ ABM? → chain: account-selection → persona-mapping → company-sourcing → contact-discovery → account-qualification → email-validation

Reference Files

Resource	When to load
`resources/reference/sales-navigator-guide.md`	ICP, scoring, boolean search, Sales Nav filters, ABM
`resources/reference/data-quality-reference.md`	Email/phone verification, bounce management, data decay
`resources/reference/scoring-decision-framework.md`	Which scoring layer to apply, decision flow, outreach motion by tier
`resources/templates/beginner-workflow.md`	7-step Clay pipeline (beginner)
`resources/templates/qualification-workflow.md`	Growth Today tier system, weighted scoring
`resources/advanced/list-building-data-sources.md`	62+ underused data sources
`resources/advanced/list-building-deep-dives.md`	Multi-source workflows, deep dives
`resources/advanced/list-building-directories.md`	100+ industry-specific directories
`resources/advanced/list-building-framework.md`	8-phase quality framework

Key Numbers

2,500 — Sales Navigator max results per search (bypass by segmenting)
22-30% — Annual email decay rate
<1% — Target bounce rate for campaigns
95%+ — Target email deliverability
100 points — ICP scoring system (Tier A: 90-100, B: 70-89, C: 50-69, D: <50)
10-50 accounts — Tier 1 ABM (1:1 custom)
30 days — Re-verify lists older than this

Response Format

Identify which sub-skill(s) the user needs
For full workflow requests, present beginner template first
Always clarify ICP if not provided (industry, company size, titles, geo, tech stack)
Provide specific, actionable steps with tool recommendations
Include relevant numbers (list size estimates, cost, timeline)

Files bundled with it

These load only when the skill asks for them, so they cost nothing until it runs.

Other skills for the same job

Different authors, same problem. Matched on the words in the skill name, across every library in the catalogue except this one.

list-building by extruct-ai · 107
list-building by Frontal-so · 5
list-building-tips by Frontal-so · 5
blitz-list-builder by growthenginenowoslawski · 718
google-maps-list-builder by growthenginenowoslawski · 718
list-builder by growthenginenowoslawski · 718
list-expander by growthenginenowoslawski · 718
list-quality-scorecard by growthenginenowoslawski · 718

Need help setting it up?

This page tells you what gt-list-building does and what it needs. Cheetah builds the agent setup it runs inside: data, CRM, sequencing and the guardrails.

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