Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add Growth-Today/claude-skills --skill gt-list-buildergit clone --depth 1 https://github.com/Growth-Today/claude-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/growth-today/claude-skills/gt-list-builder)<a href="https://agentmods.dev/skills/growth-today/claude-skills/gt-list-builder"><img src="https://agentmods.dev/badge/skills/growth-today/claude-skills/gt-list-builder/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/growth-today/claude-skills/gt-list-builder"><img src="https://agentmods.dev/badge/skills/growth-today/claude-skills/gt-list-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00174 | $0.01063 |
| Opus 5.5 | $0.00070 | $0.00425 |
| Sonnet 5.5 | $0.00035 | $0.00213 |
| Haiku 4.5 | $0.00017 | $0.00106 |
Grade A, and why
gt-list-builder scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 20d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 73 lines — stays where its author put it; the contents beside it link to each section on GitHub.
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/reference/list-building-data-sources.md |
62+ underused data sources |
resources/reference/list-building-deep-dives.md |
Multi-source workflows, deep dives |
resources/reference/list-building-directories.md |
100+ industry-specific directories |
resources/reference/list-building-framework.md |
8-phase quality framework |
What ships with it
18 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- README.md 1.4 KB
- resources/reference/data-quality-reference.md 4.2 KB
- resources/reference/list-building-data-sources.md 9.2 KB
- resources/reference/list-building-deep-dives.md 13 KB
- resources/reference/list-building-directories.md 13 KB
- resources/reference/list-building-framework.md 11 KB
- resources/reference/sales-navigator-guide.md 8.4 KB
- resources/reference/scoring-decision-framework.md 4.9 KB
- resources/sub-skills/account-qualification.md 4.3 KB
- resources/sub-skills/account-selection.md 13 KB
- resources/sub-skills/company-sourcing.md 3.6 KB
- resources/sub-skills/contact-discovery.md 4.6 KB
- resources/sub-skills/deduplication.md 4.6 KB
- resources/sub-skills/email-validation.md 4.2 KB
- resources/sub-skills/icp-definition.md 3.7 KB
- resources/sub-skills/persona-mapping.md 15 KB
- resources/templates/beginner-workflow.md 3.0 KB
- resources/templates/qualification-workflow.md 5.8 KB
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 20d ago Changed · +3 tokens per session d41e9b11ffc6
- 22d ago First seen · 73 lines · 171 tokens per session scan A 6bef60e0a9b6
gt-list-builder is a skill published in the GitHub repository Growth-Today/claude-skills (6 stars, last pushed 2d ago), licensed MIT. It adds 174 tokens to every session and 1,063 once invoked, about $0.0007 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-24.
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