Define external recording workflow for MVP

docs/architecture.md

@@ -15,12 +15,21 @@ The Meeting Knowledge Assistant transforms recorded meetings into structured org
 - Small, focused modules
 - Explicit interfaces
 - Reproducible AI outputs
+- External recording and internal processing are separate responsibilities.
+- The processing pipeline must not depend on OBS-specific metadata or behavior.
+- Imported recordings must be treated like recordings from any other supported source.
 
 ---
 
-# High-Level Pipeline
+## High-Level Pipeline
 
-Recording
+External Recorder
+    ↓
+Audio Import
+    ↓
+Recording Validation
+    ↓
+Meeting Storage
     ↓
 Transcription
     ↓
@@ -36,6 +45,38 @@ Export
 
 ---
 
+## Core Pipeline
+
+External Recording
+
+↓
+
+Audio Import and Validation
+
+↓
+
+Transcription
+
+↓
+
+Speaker Diarization
+
+↓
+
+Working Transcript
+
+↓
+
+LLM Analysis
+
+↓
+
+Knowledge Extraction
+
+↓
+
+Storage and Export
+
 # Domain Model
 
 Meeting
@@ -55,15 +96,42 @@ Meeting
 
 # Module Responsibilities
 
+## Input and Ingest
+
+Responsible for importing existing recordings into the application.
+
+Initial reference source:
+
+- OBS Studio
+
+Initial supported formats:
+
+- WAV
+
+- FLAC
+
+Responsibilities:
+
+- validate the input file
+
+- collect technical metadata
+
+- calculate checksums
+
+- copy or move the recording into the meeting directory
+
+- create the initial Recording domain object
+
+The ingest component must not perform transcription or modify the audio content.
+
 ## Recorder
 
-Responsible only for capturing audio.
+The recorder module is reserved for a future integrated recording implementation.
 
-Input:
-None
+It is not required for the MVP.
 
-Output:
-Recording
+The initial application workflow uses externally created recordings, with OBS
+Studio as the recommended reference recorder.
 
 ---
 
@@ -129,32 +197,39 @@ DOCX
 
 ---
 
-# Artifact Lifecycle
-
-Recording
-
-↓
+## Artifact Lifecycle
 
+```text
+Imported Recording
+    ↓
+Validated Source Recording
+    ↓
 Canonical Transcript
-
-↓
-
+    ↓
 Working Transcript
-
-↓
-
+    ↓
 AI Artifacts
-
-↓
-
+    ↓
 Knowledge Objects
-
-↓
-
+    ↓
 Exports
 
 ---
 
+## Initial Recording Strategy
+
+The MVP does not implement platform-specific audio capture.
+
+OBS Studio is the recommended reference recorder for online meetings.
+
+The application initially processes existing WAV or FLAC recordings. Integrated
+
+recording remains a future extension and must not be required by transcription,
+
+diarization or analysis modules.
+
+---
+
 # Storage Strategy
 
 The domain model is independent of the storage backend.