Call Summary Writer

Medium AI Agent system

A post-call step that turns a voice or video transcript into a structured summary: outcome, key facts, objections, next action, and owner. It writes the recap straight onto the lead record so the next person picks up with full context instead of relistening to the call.

Timeline 3-6 days

HMX Zone

ai agent system

Medium Agents system

Verified HMX-owned system details.

Timeline
3-6 days
Visual motif
Reasoning orbit
Live datum
A message is classified, noted, then handed to a human when needed.
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operating facts

Outcome

Every call leaves behind a clean, searchable recap and a next action, removing relisten time and dropped follow-ups.

Main risk

The summary states something the caller did not say, or fabricates a commitment.

Prevention

Constrain the model to the transcript only, require quoted evidence for commitments, and keep the recording linked for verification.

Fallback

If the transcript is low quality or the summary fails validation, attach the raw transcript and flag for manual recap.

system architecture

Call Summary Writer Architecture

Capture the transcript from
Prompt an OpenAI model to
OpenAI
Deepgram
Human Escalation
Agent Handoff
  1. 01Capture the transcript from

    A post-call step that turns a voice or video transcript into a structured summary: outcome, key facts, objections, next action, and owner.

  2. 02Prompt an OpenAI model to

    Prompt an OpenAI model to output a fixed summary schema: outcome, facts, objections, next step, sentiment

  3. 03OpenAI

    OpenAI runs the bounded conversation step for Call Summary Writer while keeping tool use, transcripts, and escalation outcomes explicit.

  4. 04Deepgram

    Validate the schema and attach the recap plus a link to the recording on the CRM record

  5. 05Human Escalation

    If the transcript is low quality or the summary fails validation, attach the raw transcript and flag for manual recap.

  6. 06Agent Handoff

    Every call leaves behind a clean, searchable recap and a next action, removing relisten time and dropped follow-ups.

how it is built

  1. 01Capture the transcript from the voice provider (Vapi/Retell webhook) or a Deepgram transcription job
  2. 02Prompt an OpenAI model to output a fixed summary schema: outcome, facts, objections, next step, sentiment
  3. 03Validate the schema and attach the recap plus a link to the recording on the CRM record
  4. 04Trigger a follow-up task or owner notification based on the detected next action

architecture notes

Architecture overview

Call Summary Writer uses a bounded agent handoff layer for AI Agents. A post-call step that turns a voice or video transcript into a structured summary: outcome, key facts, objections, next action, and owner. The architecture connects capture the transcript from, openai, deepgram, and agent handoff with an explicit control path.

  • Conversation layer: Capture the transcript from the voice provider (Vapi/Retell webhook) or a Deepgram transcription job
  • Reasoning layer: Prompt an OpenAI model to output a fixed summary schema: outcome, facts, objections, next step, sentiment
  • Tools layer: OpenAI runs the bounded conversation step for Call Summary Writer while keeping tool use, transcripts, and escalation outcomes explicit.
  • Records layer: Deepgram connects calls, messages, calendar work, or CRM writes while constrain the model to the transcript only, require quoted evidence for commitments, and keep the recording linked for verification.
  • Escalation layer: Every call leaves behind a clean, searchable recap and a next action, removing relisten time and dropped follow-ups.

Data flow

  1. Capture the transcript from the voice provider (Vapi/Retell webhook) or a Deepgram transcription job
  2. Prompt an OpenAI model to output a fixed summary schema: outcome, facts, objections, next step, sentiment
  3. Validate the schema and attach the recap plus a link to the recording on the CRM record
  4. Trigger a follow-up task or owner notification based on the detected next action

Controls and fallbacks

  • The summary states something the caller did not say, or fabricates a commitment.
  • Constrain the model to the transcript only, require quoted evidence for commitments, and keep the recording linked for verification.
  • If the transcript is low quality or the summary fails validation, attach the raw transcript and flag for manual recap.

Tools

  • OpenAI
  • Deepgram
  • Vapi
  • Retell
  • GoHighLevel

research basis

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