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Agent skill

Retellai Core Workflow B

by jeremylongshore in jeremylongshore/tons-of-skills-marketplace

Retell AI core workflow b — AI voice agent and phone call automation.

MITAuto-check passedAI & LLM Engineering

Install Retellai Core Workflow B

skills CLI
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill retellai-core-workflow-b -a claude-code

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

GitHub CLI
$ gh skill install jeremylongshore/tons-of-skills-marketplace retellai-core-workflow-b --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/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/.curated/retellai-core-workflow-b .claude/skills/retellai-core-workflow-b && 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
retellai-core-workflow-b
GitHub stars
2.8k
Token cost
~784 tokens
SKILL.md length
176 words
Files
1
Skills in repo
3,342
Repo updated
First seen
Licence
MIT

At a glance

Retell AI core workflow b — AI voice agent and phone call automation.

  • Works in 3 steps: Outbound Call Campaign → List and Filter Calls → Get Call Recording and Transcript
  • Working with Retell AI for voice agents
  • SKILL.md covers Overview, Prerequisites, Instructions and Output, plus 4 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Retellai Core Workflow B is an agent skill from jeremylongshore/tons-of-skills-marketplace. Retell AI core workflow b — AI voice agent and phone call automation. Use when working with Retell AI for voice agents, phone calls, or telephony. Trigger with phrases like "retell core workflow b", "retellai-core-workflow-b", "voice agent".

Its SKILL.md is about 780 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts. Compatibility notes: Designed for Claude Code

It sits in AI & LLM Engineering, covering Speech recognition and synthesis. The repository describes itself as: Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com. The licence is MIT.

When your agent uses it

  • Working with Retell AI for voice agents
  • With phrases like retell core workflow b
  • Retellai-core-workflow-b

Example prompts

  • “retell core workflow b”
  • “retellai-core-workflow-b”
  • “voice agent”
  • “/retellai-core-workflow-b”

Requirements

  • Compatibility (from SKILL.md): Designed for Claude Code
  • Pre-approved tools (allowed-tools): Read, Write, Edit, Bash(npm:*), Bash(curl:*), Grep

Workflow steps

3 steps, taken from the step headings in SKILL.md.

  1. Outbound Call Campaign
  2. List and Filter Calls
  3. Get Call Recording and Transcript

What it can do on your machine

Read from SKILL.md and the folder at commit cfae287. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Write
    • Edit
    • Bash(npm:*)
    • Bash(curl:*)
    • Grep

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are typescript).

    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):

    • docs.retellai.com

    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.

  • Compatibility

    Designed for Claude Code

    From compatibility in the SKILL.md frontmatter.

Context cost

Retellai Core Workflow B loads about 784 tokens when it runs. Until then it costs about 67 tokens; SKILL.md has 176 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~67
When it runs · the whole SKILL.md, loaded when a task matches
~784

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 jeremylongshore/tons-of-skills-marketplace at commit cfae287, republished under its MIT licence (© jeremylongshore). 176 words, ~784 tokens.

Download SKILL.mdSave it as .claude/skills/retellai-core-workflow-b/SKILL.md (or your agent's skills folder).
name
retellai-core-workflow-b
description
Retell AI core workflow b — AI voice agent and phone call automation. Use when working with Retell AI for voice agents, phone calls, or telephony. Trigger with phrases like "retell core workflow b", "retellai-core-workflow-b", "voice agent".
allowed-tools
Read, Write, Edit, Bash(npm:*), Bash(curl:*), Grep
compatibility
Designed for Claude Code
version
1.9.0
license
MIT
author
Jeremy Longshore <jeremy@intentsolutions.io>
tags
saas, retellai, voice, telephony, ai-agents

Retell AI Core Workflow B

Overview

Manage phone calls: outbound campaigns, call transfers, recordings, and concurrent call handling.

Prerequisites

  • Completed retellai-core-workflow-a

Instructions

Step 1: Outbound Call Campaign
typescript
const phoneNumbers = ['+14155551001', '+14155551002', '+14155551003'];

for (const number of phoneNumbers) {
  try {
    const call = await retell.call.createPhoneCall({
      from_number: process.env.RETELL_PHONE_NUMBER!,
      to_number: number,
      override_agent_id: agentId,
      metadata: { campaign: 'appointment-reminder', date: '2026-04-01' },
    });
    console.log(`Called ${number}: ${call.call_id}`);
  } catch (err) {
    console.error(`Failed to call ${number}: ${err.message}`);
  }
  // Rate limit: space calls apart
  await new Promise(r => setTimeout(r, 2000));
}
Step 2: List and Filter Calls
typescript
const calls = await retell.call.list({
  sort_order: 'descending',
  limit: 20,
});
for (const call of calls) {
  console.log(`${call.call_id}: ${call.call_status} — ${call.end_timestamp - call.start_timestamp}ms`);
}
Step 3: Get Call Recording and Transcript
typescript
const callDetail = await retell.call.retrieve(callId);
if (callDetail.recording_url) {
  console.log(`Recording: ${callDetail.recording_url}`);
}
if (callDetail.transcript) {
  console.log(`Transcript:\n${callDetail.transcript}`);
}

Output

  • Outbound call campaign with rate limiting
  • Call listing with status and duration
  • Recordings and transcripts retrieved

Error Handling

ErrorCauseSolution
Call fails immediatelyBad phone number formatUse E.164 format
No recordingRecording not enabledEnable in agent settings
Concurrent limitToo many active callsUpgrade plan or queue calls

Examples

Run a bounded outbound appointment reminder campaign

Upload only consented test contacts to a development campaign and set a small concurrency limit before enabling any production queue. For each test call, verify the E.164 number formatting, expected agent version, completion status, and redacted transcript retrieval. If a call result is ambiguous, query the call identifier before retrying so an operator does not create duplicate calls or overwrite the original outcome.

Resources

Next Steps

Handle call events: retellai-webhooks-events

© jeremylongshore, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/.curated/retellai-core-workflow-b of jeremylongshore/tons-of-skills-marketplace.

Open the folder on GitHubat commit cfae287

Compare with similar skills

Retellai Core Workflow B 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.

Retellai Core Workflow B compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Retellai Core Workflow B this skilljeremylongshore/tons-of-skills-marketplace2.8k—~784Automated safety check: PassMIT
TriageTalAter/annyang6.8k—~810Automated safety check: NotesMIT
Yichen Asrmcncarl/yichen-skills4.4k—~780Automated safety check: PassCustom licence
Dingtalk MinutesDingTalk-Real-AI/dingtalk-workspace-cli3.2k—~2.3kAutomated safety check: PassApache-2.0
Youtube FetcherJimmySadek/youtube-fetcher-to-markdown485—~3.1kAutomated safety check: PassMIT
Yichen Web Researchmcncarl/yichen-skills4.4k—~1.9kAutomated safety check: PassCustom licence

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Categories

Questions about Retellai Core Workflow B

What does Retellai Core Workflow B do?

Retell AI core workflow b — AI voice agent and phone call automation. Retellai Core Workflow B is an agent skill from jeremylongshore/tons-of-skills-marketplace. Retell AI core workflow b — AI voice agent and phone call automation.

When should I use Retellai Core Workflow B?

Retellai Core Workflow B fits situations like: working with Retell AI for voice agents; with phrases like retell core workflow b; retellai-core-workflow-b.

How do I install Retellai Core Workflow B in Claude Code?

Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill retellai-core-workflow-b -a claude-code`. Or copy the skill folder (skills/.curated/retellai-core-workflow-b in jeremylongshore/tons-of-skills-marketplace) into .claude/skills/retellai-core-workflow-b in your project. Claude Code loads it when a task matches its description.

How do I install Retellai Core Workflow B in Codex?

Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill retellai-core-workflow-b -a codex`. Or copy the skill folder (skills/.curated/retellai-core-workflow-b in jeremylongshore/tons-of-skills-marketplace) into .agents/skills/retellai-core-workflow-b in your project. Codex loads it when a task matches its description.

Can I use Retellai Core Workflow B 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 jeremylongshore/tons-of-skills-marketplace --skill retellai-core-workflow-b -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/retellai-core-workflow-b, .gemini/skills/retellai-core-workflow-b, .github/skills/retellai-core-workflow-b and .opencode/skills/retellai-core-workflow-b in your project.

What does Retellai Core Workflow B need to run?

SKILL.md names no scripts, command-line tools or credentials: Retellai Core Workflow B is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Write, Edit, Bash(npm:*), Bash(curl:*), Grep. Compatibility (from SKILL.md): Designed for Claude Code.

Does Retellai Core Workflow B access the network?

SKILL.md names 1 domain. As links in the text: docs.retellai.com. This is read from the text; nothing was executed.

Is Retellai Core Workflow B 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 Retellai Core Workflow B use?

Retellai Core Workflow B is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Retellai Core Workflow B use?

About 784 tokens (SKILL.md is roughly 3.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Retellai Core Workflow B?

Skills that share tags, products or a category with Retellai Core Workflow B: Triage (TalAter/annyang, 6.8k stars), Yichen Asr (mcncarl/yichen-skills, 4.4k stars), Dingtalk Minutes (DingTalk-Real-AI/dingtalk-workspace-cli, 3.2k stars) and Youtube Fetcher (JimmySadek/youtube-fetcher-to-markdown, 485 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Retellai Core Workflow B?

jeremylongshore (a GitHub user) maintains it in jeremylongshore/tons-of-skills-marketplace, which has 2,827 GitHub stars. The repository holds 3,342 skills in this directory. The repository was last updated on October 10, 2026.

Source: jeremylongshore/tons-of-skills-marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.