Agent skill

Retellai Cost Tuning

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

Retell AI cost tuning — AI voice agent and phone call automation.

MITAuto-check passedAI & LLM Engineering

Install Retellai Cost Tuning

skills CLI
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill retellai-cost-tuning -a claude-code

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

GitHub CLI
$ gh skill install jeremylongshore/tons-of-skills-marketplace retellai-cost-tuning --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-cost-tuning .claude/skills/retellai-cost-tuning && 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-cost-tuning
GitHub stars
2.8k
Token cost
~505 tokens
SKILL.md length
149 words
Files
2 (incl. references)
Skills in repo
3,342
Repo updated
First seen
Licence
MIT

At a glance

Retell AI cost tuning — AI voice agent and phone call automation.

  • Working with Retell AI for voice agents
  • SKILL.md covers Overview, Prerequisites, Instructions and Output, plus 4 more sections
  • Needs RETELL_API_KEY
  • With phrases like retell cost tuning

What it does

Retellai Cost Tuning is an agent skill from jeremylongshore/tons-of-skills-marketplace. Retell AI cost tuning — 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 cost tuning", "retellai-cost-tuning", "voice agent".

Its SKILL.md is about 510 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/cost-optimization.md`). 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 cost tuning
  • Retellai-cost-tuning

Example prompts

  • “retell cost tuning”
  • “retellai-cost-tuning”
  • “voice agent”
  • “/retellai-cost-tuning”

Requirements

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

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
    • npmjs.com

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names these keys or tokens, usually read from environment variables:

    • RETELL_API_KEY

    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 Cost Tuning loads about 505 tokens when it runs, and up to ~1.2k if it reads all its reference files. Until then it costs about 63 tokens; SKILL.md has 149 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~63
When it runs · the whole SKILL.md, loaded when a task matches
~505
With references · SKILL.md plus every file in references/, read only if the agent opens them
~1.2k

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). 149 words, ~505 tokens.

Download SKILL.mdSave it as .claude/skills/retellai-cost-tuning/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
retellai-cost-tuning
description
Retell AI cost tuning — 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 cost tuning", "retellai-cost-tuning", "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 Cost Tuning

Overview

Implementation patterns for Retell AI cost tuning — voice agent and telephony platform.

Prerequisites

  • Completed retellai-install-auth setup

Instructions

Step 1: SDK Pattern
typescript
import Retell from 'retell-sdk';
const retell = new Retell({ apiKey: process.env.RETELL_API_KEY! });

const agents = await retell.agent.list();
console.log(`Agents: ${agents.length}`);

Output

  • Retell AI integration for cost tuning

Error Handling

ErrorCauseSolution
401 UnauthorizedInvalid API keyCheck RETELL_API_KEY
429 Rate LimitedToo many requestsImplement backoff
400 Bad RequestInvalid parametersCheck API documentation

Examples

Reduce cost without degrading a required human handoff

Measure average call duration, transfer rate, and failed-call retries for a representative non-production sample before changing prompt length or model settings. Trial the lower-cost configuration on a small canary, retaining the existing agent version as rollback. Keep the human-handoff trigger unchanged unless the service owner approves a new threshold; a shorter call is not a saving if it silently increases unresolved customer requests.

Resources

Next Steps

See related Retell AI skills for more workflows.

© 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

SKILL.md and 1 other file (references) in skills/.curated/retellai-cost-tuning of jeremylongshore/tons-of-skills-marketplace.

  • SKILL.md
  • references/cost-optimization.md

Open the folder on GitHubat commit cfae287

Compare with similar skills

Retellai Cost Tuning 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 Cost Tuning compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Retellai Cost Tuning this skilljeremylongshore/tons-of-skills-marketplace2.8k—~505Automated 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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Questions about Retellai Cost Tuning

What does Retellai Cost Tuning do?

Retell AI cost tuning — AI voice agent and phone call automation. Retellai Cost Tuning is an agent skill from jeremylongshore/tons-of-skills-marketplace. Retell AI cost tuning — AI voice agent and phone call automation.

When should I use Retellai Cost Tuning?

Retellai Cost Tuning fits situations like: working with Retell AI for voice agents; with phrases like retell cost tuning; retellai-cost-tuning.

How do I install Retellai Cost Tuning in Claude Code?

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

How do I install Retellai Cost Tuning in Codex?

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

Can I use Retellai Cost Tuning 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-cost-tuning -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-cost-tuning, .gemini/skills/retellai-cost-tuning, .github/skills/retellai-cost-tuning and .opencode/skills/retellai-cost-tuning in your project.

What does Retellai Cost Tuning need to run?

Going by SKILL.md and its folder, Retellai Cost Tuning needs credentials named RETELL_API_KEY. Our summary lists: A credential in RETELL_API_KEY. Its frontmatter pre-approves these tools: Read, Write, Edit, Bash(npm:*), Bash(curl:*), Grep. Compatibility (from SKILL.md): Designed for Claude Code.

Does Retellai Cost Tuning access the network?

SKILL.md names 2 domains. As links in the text: docs.retellai.com and npmjs.com. This is read from the text; nothing was executed.

Is Retellai Cost Tuning 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 Cost Tuning use?

Retellai Cost Tuning 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 Cost Tuning use?

About 505 tokens (SKILL.md is roughly 2k 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 647 tokens, read only when the agent opens those files.

What are the alternatives to Retellai Cost Tuning?

Skills that share tags, products or a category with Retellai Cost Tuning: 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 Cost Tuning?

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.