Audits claimed public or institutional directories (insurer provider rolls, marketplace sellers) with CALL-E phone calls, flagging each listing Present or Ghost with cited transcript evidence and a…

MITAuto-check passed

Install Muster

skills CLI
$ npx skills add CALLE-AI/awesome-phone-call-agents --skill muster -a claude-code

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

GitHub CLI
$ gh skill install CALLE-AI/awesome-phone-call-agents muster --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/CALLE-AI/awesome-phone-call-agents.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/muster .claude/skills/muster && 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
muster
GitHub stars
107
Token cost
~1.6k tokens
SKILL.md length
567 words
Files
4 (incl. scripts, references)
Skills in repo
101
Repo updated
First seen
Licence
MIT

At a glance

Audits claimed public or institutional directories (insurer provider rolls, marketplace sellers) with CALL-E phone calls, flagging each listing Present or Ghost with cited transcript evidence and a…

  • Works in 4 steps: Zero-Cost Rehearsal (Mock Mode) → Live Phone Verification (CALL-E Runtime) → Invocation via FastMCP Tool → …
  • SKILL.md covers Prerequisites & Engine Setup, When to Use This Skill, Inputs & Parameters and Outputs & Artifacts, plus 2 more sections
  • Runs Python scripts from its folder; calls python, git and pip; reaches github.com

What it does

Muster is an agent skill from CALLE-AI/awesome-phone-call-agents. Audits claimed public or institutional directories (insurer provider rolls, marketplace sellers) with CALL-E phone calls, flagging each listing Present or Ghost with cited transcript evidence and a headline ghost-rate.

Its SKILL.md is about 1.6k tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including scripts and reference files (for example `references/examples.md`, `references/safety.md` and `scripts/run_audit.py`).

The repository describes itself as: Portable phone-call Agent Skills, apps, examples, adapters, and scheduler recipes for AI agents. The licence is MIT.

Example prompts

  • “Use the muster skill to audit claimed public or institutional directories (insurer provider rolls, marketplace sellers) with CALL-E phone calls…”
  • “/muster”

Requirements

  • Python 3

Workflow steps

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

  1. Zero-Cost Rehearsal (Mock Mode)
  2. Live Phone Verification (CALL-E Runtime)
  3. Invocation via FastMCP Tool
  4. Interactive Live Audit Ledger UI

What it can do on your machine

Read from SKILL.md and the folder at commit 38d4118. It shows what the files ask for, not the result of running them.

  • Tool permissions

    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.

  • Runs code

    Ships 1 file in scripts/ (Python), which the agent can run.

    Shell commands in SKILL.md call:

    • python
    • git
    • pip

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Hosts in commands or code, which the agent is likely to contact:

    • github.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.

Context cost

Muster loads about 1.6k tokens when it runs, and up to ~2.5k if it reads all its reference files. Until then it costs about 56 tokens; SKILL.md has 567 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~56
When it runs · the whole SKILL.md, loaded when a task matches
~1.6k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~2.5k

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); the scripts in this folder are not scanned.

SKILL.md

The full file from CALLE-AI/awesome-phone-call-agents at commit 38d4118, republished under its MIT licence (© CALLE-AI). 567 words, ~1,608 tokens.

Download SKILL.mdSave it as .claude/skills/muster/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.
name
muster
description
Audits claimed public or institutional directories (insurer provider rolls, marketplace sellers) with CALL-E phone calls, flagging each listing Present or Ghost with cited transcript evidence and a headline ghost-rate.

Muster — Directory Ghost-Rate Auditor (CALL-E Agent Skill)

Audits directories before patients and consumers suffer from ghost networks.

Muster automates offline batch phone verification of contact directories that institutions claim are active:

  • Insurer in-network provider rolls (primary care, therapists, clinics, specialists)
  • Marketplace verified merchants (vendors, retail store fronts, inventory fulfillment)

By placing non-invasive, consent-first qualifying calls via CALL-E, Muster asks ONE benign verification question, extracts structured operational signals, cites verbatim transcript quotes, and computes the verified Ghost Rate (e.g. "7 of 12 audited = GHOST, 58.3%").


Prerequisites & Engine Setup

This skill orchestrates the open-source Muster directory auditor engine. To run audits locally:

bash
# Clone and install the Muster engine
git clone https://github.com/omshukla24/Muster.git
cd Muster
pip install -e .

Note: For lightweight workflow exploration, the skill operates in mock mode by default, allowing zero-cost simulated audits with bundled sample schemas without needing live telephony credits.


When to Use This Skill

Activate Muster when an agent or auditor needs to:

  1. Audit a directory file (.csv or .json) to flag defunct, disconnected, or left-network listings.
  2. Calculate headline Ghost Rate and real-world consumer access metrics (e.g. "A patient must call ~2.4 listings to reach 1 real provider").
  3. Generate cited evidence reports containing verbatim spoken receptionist quotes for compliance or enforcement.
  4. Invoke via FastMCP tool audit_directory from any agent workflow.

Inputs & Parameters

ParameterTypeDefaultDescription
directoryFile PathRequiredPath to CSV or JSON directory file (must contain entity name and phone number).
sectorStringUS_INSURERSector archetype: US_INSURER (healthcare in-network) or MARKETPLACE_SELLER (merchants).
modeStringmockmock (zero-cost simulated rehearsal) or live (places real phone calls via CALL-E).
goalStringAuto-selectedCustom verification question. If omitted, uses sector default.
concurrencyInteger2Number of simultaneous verification calls (max recommended: 3).
Input Schema Examples
CSV Format (sample_data/us_insurer_network.csv)
csv
id,name,phone,claimed_status,category,address
PROV-101,"Dr. Sarah Jenkins, MD",+15552340101,In-Network - BlueCross PPO,Primary Care,"Austin, TX"
PROV-102,Summit Psychological Associates,+15552340102,In-Network - Aetna Choice,Mental Health,"Denver, CO"
JSON Format (sample_data/us_insurer_network.json)
json
[
  {
    "id": "PROV-101",
    "name": "Dr. Sarah Jenkins, MD (Family Medicine)",
    "phone": "+15552340101",
    "claimed_status": "In-Network - BlueCross PPO",
    "category": "Primary Care",
    "address": "Austin, TX"
  }
]

Outputs & Artifacts

Muster produces experimental, advisory classifications intended for human review and operational triage (not definitive legal or regulatory compliance verdicts):

Verdict Definitions
  • PRESENT: Authorized respondent affirmed in-network participation and intake availability.
  • GHOST: Dead/unallocated number, wrong person/business reached, or respondent explicitly stated provider left network / closed.
  • UNREACHABLE: Call timed out after multiple rings, busy signal, automated IVR voicemail loop without human answer, or carrier delivery failure.
  • UNCERTAIN: Inconclusive dialogue or premature disconnection.
Show full SKILL.md (213 more words)Show less
Generated Artifacts
  1. reports/muster_audit_<job_id>.csv: Tabular dataset with entry IDs, phone numbers, verdicts, confidence scores, and cited evidence quotes.
  2. reports/muster_audit_<job_id>.json: Machine-readable audit package including verbatim transcripts and full schema extractions.
  3. reports/muster_audit_<job_id>.md: Executive Audit Report (Advisory) summarizing findings, confidence scores, and patient access ratios for human audit review.

Usage Examples

1. Zero-Cost Rehearsal (Mock Mode)

Run a deterministic audit simulating realistic reception dialogues without spending CALL-E credits:

bash
python skills/muster/scripts/run_audit.py sample_data/us_insurer_network.json --mode mock
2. Live Phone Verification (CALL-E Runtime)

Run real phone verification calls through authenticated CALL-E CLI:

bash
python skills/muster/scripts/run_audit.py sample_data/us_insurer_network.json \
  --mode live \
  --concurrency 2 \
  --goal "Hello, I am calling to verify directory network status. Are you currently in-network and accepting new patients?"

(Note: Live runs require interactive confirmation or --confirm-live to protect against unintentional credit spend).

3. Invocation via FastMCP Tool

Any agent or MCP client can invoke Muster directly:

python
from muster.mcp_server import audit_directory

report = await audit_directory(
    file_path="sample_data/us_insurer_network.json",
    sector="US_INSURER",
    mode="mock"
)
print(report)
4. Interactive Live Audit Ledger UI

Launch the full-bleed responsive web dashboard:

bash
python -m muster.cli ui --port 8000

Open http://127.0.0.1:8000 to inspect the live switchboard, telegraph typing, and "The Reveal" finale.


Safety & Telephony Contract

All live operations are strictly governed by our Safety Contract, enforcing authorized E.164 recipients, per-run human preview/approval, privacy phone masking, no auto-retries on ambiguity, and honest cancellation limits.

  • Benign Qualifying Questions Only: Muster strictly verifies administrative network status. Never request patient health information, medical history, or payment details.
  • Rate-Limited Gateways: Concurrency defaults to 2 simultaneous calls to respect cellular gateways and medical front desks.
  • Transparent Identification: Verification inquiries explicitly introduce themselves as directory verification checks.

© CALLE-AI, 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 3 other files (scripts, references) in skills/muster of CALLE-AI/awesome-phone-call-agents.

  • SKILL.md
  • references/examples.md
  • references/safety.md
  • scripts/run_audit.py

Open the folder on GitHubat commit 38d4118

Compare with similar skills

Muster 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.

Muster compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Muster this skillCALLE-AI/awesome-phone-call-agents107—~1.6kAutomated safety check: PassMIT
Auditing Azure Active Directory Configurationmukul975/Anthropic-Cybersecurity-Skills34k—~3kAutomated safety check: PassApache-2.0
Paper Claim Auditwanshuiyin/Auto-claude-code-research-in-sleep17k1 repos~3.5kAutomated safety check: NotesMIT
Insurance Claimmohitagw15856/pm-claude-skills1.4k—~1.1kAutomated safety check: PassMIT
Claimsruvnet/ruflo74k2 repos~1.1kAutomated safety check: PassMIT
Production Auditaffaan-m/ECC276k1 repos~1.9kAutomated safety check: PassMIT

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Questions about Muster

What does Muster do?

Audits claimed public or institutional directories (insurer provider rolls, marketplace sellers) with CALL-E phone calls, flagging each listing Present or Ghost with cited transcript evidence and a…. Muster is an agent skill from CALLE-AI/awesome-phone-call-agents. Audits claimed public or institutional directories (insurer provider rolls, marketplace sellers) with CALL-E phone calls, flagging each listing Present or Ghost with cited transcript evidence and a headline ghost-rate.

How do I install Muster in Claude Code?

Run `npx skills add CALLE-AI/awesome-phone-call-agents --skill muster -a claude-code`. Or copy the skill folder (skills/muster in CALLE-AI/awesome-phone-call-agents) into .claude/skills/muster in your project. Claude Code loads it when a task matches its description.

How do I install Muster in Codex?

Run `npx skills add CALLE-AI/awesome-phone-call-agents --skill muster -a codex`. Or copy the skill folder (skills/muster in CALLE-AI/awesome-phone-call-agents) into .agents/skills/muster in your project. Codex loads it when a task matches its description.

Can I use Muster 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 CALLE-AI/awesome-phone-call-agents --skill muster -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/muster, .gemini/skills/muster, .github/skills/muster and .opencode/skills/muster in your project.

What does Muster need to run?

Going by SKILL.md and its folder, Muster needs Python for the scripts in its folder and the command-line tools its instructions call (python, git and pip). Our summary lists: Python 3.

Does Muster access the network?

SKILL.md names 1 domain. In commands or code: github.com; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.

Is Muster 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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Muster use?

Muster is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Muster use?

About 1.6k tokens (SKILL.md is roughly 6.4k 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 878 tokens, read only when the agent opens those files.

What are the alternatives to Muster?

Skills that share tags, products or a category with Muster: Auditing Azure Active Directory Configuration (mukul975/Anthropic-Cybersecurity-Skills, 34k stars), Paper Claim Audit (wanshuiyin/Auto-claude-code-research-in-sleep, 17k stars), Insurance Claim (mohitagw15856/pm-claude-skills, 1.4k stars) and Claims (ruvnet/ruflo, 74k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Muster?

CALLE-AI (a GitHub organization) maintains it in CALLE-AI/awesome-phone-call-agents, which has 107 GitHub stars. The repository holds 101 skills in this directory. The repository was last updated on October 10, 2026.

Source: CALLE-AI/awesome-phone-call-agents on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.