dialtone-handshake SKILL.md skillA
dialtone-handshake from calle-ai/awesome-phone-call-agents is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add calle-ai/awesome-phone-call-agents/dialtone-handshake@git:20260914.cb33c28Pins git:20260914.cb33c28 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- calle-ai/awesome-phone-call-agents
- Path
skills/dialtone-handshake/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260914.cb33c28, committed Sep 14, 2026
- Size
- 4,041 bytes
- Repository stars
- 112
- License
- MIT
Use when an AI phone call agent (outbound caller or inbound voicebot) needs to recognise that the other end of the call is also an AI, switch to a compressed machine mode, and label call results by who actually attested them (human, phone system, or AI agent).
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
# DIALTONE Handshake DIALTONE v1 is a spoken handshake plus an attestation rule for phone calls where both ends may be AI agents. It has two halves: - **Caller side:** a CALL-E task that opens with a spoken token and switches mode depending on who answers. - **Inbound side:** three system-prompt sentences that let a voicebot acknowledge the token. The runnable reference implementation is `apps/python/dialtone`. It includes detection, the attestation gate, an honest evaluation and a demo. ## When To Use - You place calls with CALL-E to businesses that may answer with a voicebot. - You operate an inbound voicebot and want automated callers to finish faster and more honestly. - Your workflow treats `task_completed: true` as a commitment: bookings, cancellations, refunds, payments or reschedules. ## When Not To Use - **As authentication.** The nonce proves an acknowledgement answers *this* call, not who operates the agent. - **To skip disclosure.** The token is spoken *after* the AI disclosure, never instead of it. - **For emergency, medical, legal or financial decisions.** An `agent_asserted` result is not sufficient evidence for these. ## Protocol …
Read the whole file at its exact version.
How to install
mdr add calle-ai/awesome-phone-call-agents/dialtone-handshake@sha256:4b02a3376db442cbThe line at the top of this page pins the label git:20260914.cb33c28, 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_54pgermvitqjkvoi)
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Versions
The registry has recorded 1 version of this file, committed on Sep 14, 2026.
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 (4041 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
calle-ai/awesome-phone-call-agents · 112 stars · license MIT · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_54pgermvitqjkvoi GET https://markdownregistry.com/api/v1/resolve?ref=calle-ai/awesome-phone-call-agents/dialtone-handshake GET https://markdownregistry.com/api/v1/blob/4b02a3376db442cb247eff417d6a0a07fe1e36845a00025e09ab1ded176ca590
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.