system-understanding

name	system-understanding
description	Build a code-grounded implementation plan before coding. Use to trace packet flow, factory boundaries, provider config loading, and exact file-level change scope for a requested integration.

System Understanding Skill

Mission

Produce an executable, minimal-risk implementation plan from real code paths before changing feature logic.

Scope

Planning and analysis only. Do not implement production changes in this skill run.

Mandatory discovery sequence

1. Identify feature lane and factory switch:

• telephony: api/assistant-api/internal/channel/telephony/telephony.go
• stt/tts: api/assistant-api/internal/transformer/transformer.go
• vad: api/assistant-api/internal/vad/vad.go
• eos: api/assistant-api/internal/end_of_speech/end_of_speech.go
• llm: api/integration-api/internal/caller/caller.go

2. Trace runtime packet flow in dispatcher:

• api/assistant-api/internal/adapters/internal/dispatch.go

3. Verify UI/provider config load behavior:

• ui/src/providers/provider.development.json
• ui/src/providers/provider.production.json
• ui/src/providers/config-loader.ts

4. Produce exact edit scope:

• provider folder
• factory file
• optional shared contract files
• tests to update

Output requirements

• Requested integration type and inferred defaults.
• Transport/signal mode chosen and why.
• Exact file list to edit (and explicit out-of-scope file list).
• Test and validation command plan.
• Risks and rollback path.

Governed lifecycle

• This planning skill owns only the understand and plan phases from DEVELOPMENT_PROCESS.md.
• The plan must declare acceptance criteria, non-goals, allowed paths, explicit owners, principles, required tests and commands, risks, and rollback.
• A separate plan-challenger must review the output; this skill may not approve its own plan or perform implementation.
• The coordinator attests the approved plan before any implementation worker starts.

Validation commands

• rg -n "GetTelephony|GetSpeechToTextTransformer|GetTextToSpeechTransformer|GetEndOfSpeech|GetVAD" api
• rg -n "GetLargeLanguageCaller|GetEmbeddingCaller|GetRerankingCaller|GetVerifier" api/integration-api
• rg -n "OnPacket\(|dispatch\(" api/assistant-api/internal/adapters/internal/dispatch.go