voice-agent SKILL.md skillA
voice-agent from vanducng/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add vanducng/skills/voice-agent@v0.4.0Pins v0.4.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- vanducng/skills
- Path
skills/voice-agent/SKILL.md- Versions recorded
- 5
- Latest version
- v0.4.0, committed Sep 11, 2026
- First version recorded
- Jul 30, 2026
- Size
- 9,172 bytes
- Repository stars
- 8
- License
- MIT
Operate the `vac` CLI for Retell voice AI - bounded reads and explicitly authorized writes over agents, prompts, tools, tests, calls, transcripts, chats, phone numbers, voices, flows, knowledge bases, and exports. Use when the user mentions `vac` or Retell, asks to list/create/update voice agents, numbers, or flows, diagnose a call or transcription, or export call data.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Voice Agent Operate Retell through the installed `vac` CLI: generated help, bounded reads, explicit write authorization, structured evidence. `vac` is the execution boundary; Retell is one provider within a provider-neutral CLI. ## Start safely 1. Confirm the installed contract: ```bash command -v vac && vac --version && type -a vac && vac retell --help ``` If more than one `vac` is installed, keep discovery and execution on the same resolved binary and version. Do not combine help from one installation with commands run by another. 2. Discover the exact group and operation (`vac retell agents --help`, `vac retell agents list --help`), then verify access with the smallest bounded read: ```bash vac retell agents list --limit 1 --fields agent_id,agent_name ``` 3. If the bounded read fails, resolve by cause, then retry it: - `NO_CONFIG` - ask the user to run `vac retell login` in their own interactive terminal (login needs a TTY, prompts securely, stores the key in `$XDG_CONFIG_HOME/voice-agent/config.json`, falling back to `~/.config/voice-agent/config.json`). - `AUTH_ERROR` - check credential-source presence only, never values. …
Read the whole file at its exact version.
How to install
mdr add vanducng/skills/voice-agent@sha256:5eb995fe8d00cdb4The line at the top of this page pins the label v0.4.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_ji3yfx775itoyelj)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Jul 30, 2026 and Sep 11, 2026, about one every 11 days. Its first recorded version is graded B and its latest A.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v0.4.0 latest | 2026-09-11 | 9e58ef3 | 9,172 B | A | view · diff |
| v0.3.0 | 2026-08-19 | 204f73f | 10,989 B | B | view · diff |
| v0.3.0 | 2026-08-16 | c83d21b | 10,991 B | B | view · diff |
| v0.3.0 | 2026-08-06 | e1c2956 | 10,796 B | B | view · diff |
| v0.3.0 | 2026-07-30 | 15eca14 | 10,625 B | B | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (9172 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
vanducng/skills · 8 stars · license MIT · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ji3yfx775itoyelj GET https://markdownregistry.com/api/v1/resolve?ref=vanducng/skills/voice-agent GET https://markdownregistry.com/api/v1/blob/5eb995fe8d00cdb43cfcda3114a0f5d833b2d809c62382371a239edb5c8dcfcc
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.