[DOC] - AI Params audit.

[briankwest]

AI Parameters Audit: SignalWire Documentation vs C Code Implementation

Generated: December 2024
Source: Analysis of mod_openai C codebase against SignalWire AI Parameters Documentation

Executive Summary

This audit compares the AI parameters documented in SignalWire's official documentation against the actual implementation in the C codebase. The analysis reveals that the C code implementation is more comprehensive than the documentation, with many parameters implemented but not documented.

Key Findings:

• ✅ 67 parameters are properly implemented and documented
• ❌ 15+ parameters are implemented but missing from documentation
• 🔧 Several parameters have different defaults/ranges than documented
• 📝 Documentation gaps exist for developer-mode and advanced parameters

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✅ IMPLEMENTED & DOCUMENTED PARAMETERS

Parameter	Type	Default	Range/Values	C Code Location	Notes
acknowledge_interruptions	boolean/number	false	boolean or positive integer	ai_utils.c:4696	Can be boolean or max interrupt count
ai_model	string	"gpt-4o-mini"	gpt-4o-mini, gpt-4.1-mini, gpt-4.1-nano	ai_utils.c:4528	Model validation enforced
ai_volume	integer	0	-50 to 50	ai_utils.c:4742	Volume adjustment for AI voice
attention_timeout	integer	5000	0 or 10000-600000 ms	ai_utils.c:4930	0 disables timeout
attention_timeout_prompt	string	"The user has not responded, try to get their attention. Stay in the same language."	any string	ai_utils.c:4970	Custom attention prompt
asr_diarize	boolean	false	boolean	ai_utils.c:4618	Speaker diarization
asr_speaker_affinity	boolean	false	boolean	ai_utils.c:4606	Speaker affinity mode
audible_debug	boolean	false	boolean	ai_utils.c:7795	Announces function execution
background_file	string	undefined	URL/file path	ai_utils.c:4840	Background audio file
background_file_loops	integer	undefined	positive integer	ai_utils.c:4842	Loop count for background file
background_file_volume	integer	0	-50 to 50	ai_utils.c:4852	Background file volume
barge_match_string	string	undefined	regex string	ai_utils.c:4750	Regex for barge behavior
barge_min_words	integer	undefined	1-99	ai_utils.c:4755	Min words before barge
conscience	boolean/string	true	boolean or custom string	ai_utils.c:4975	Agent behavior enforcement
conversation_id	string	undefined	any string	ai_utils.c:4819	Conversation tracking ID
debug_webhook_level	integer	1	0-2	ai_utils.c:4683	Debug webhook verbosity
debug_webhook_url	string	undefined	URL	ai_utils.c:4637	Debug webhook endpoint
direction	string	auto	"inbound", "outbound"	mod_openai.c:2740	Call direction override
digit_terminators	string	undefined	DTMF characters	ai_utils.c:4880	DTMF input terminators
digit_timeout	integer	3000	0-30000 ms	ai_utils.c:4875	DTMF input timeout
eleven_labs_similarity	number	undefined	0.01-1.0	ai_utils.c:300	ElevenLabs voice similarity
eleven_labs_stability	number	undefined	0.01-1.0	ai_utils.c:291	ElevenLabs voice stability
enable_barge	string	"complete,partial"	"complete", "partial", "all", boolean	ai_utils.c:4782	Barge behavior control
enable_thinking	boolean	false	boolean	ai_utils.c:7713	AI thinking capabilities
enable_vision	boolean	false	boolean	ai_utils.c:7700	Visual input processing
end_of_speech_timeout	integer	700	0-10000 ms	ai_utils.c:4885	End of speech detection
energy_level	number	52.0	0.0-100.0 dB	ai_utils.c:4920	Voice activity threshold
function_wait_for_talking	boolean	false	boolean	ai_utils.c:4767	Function execution timing
hard_stop_prompt	string	"Explain to the user..."	any string	mod_openai.c:3189	Hard stop message
hard_stop_time	string	undefined	time format	mod_openai.c:3188	Session time limit
hold_music	string	undefined	URL or tone: format	ai_utils.c:4572	Hold music configuration
hold_on_process	boolean	false	boolean	ai_utils.c:4580	Hold during processing
inactivity_timeout	integer	600000	0 or 10000-3600000 ms	ai_utils.c:4940	Inactivity timeout
initial_sleep_ms	integer	0	0-300000 ms	ai_utils.c:4910	Initial delay before AI starts
input_poll_freq	integer	2000	1000-10000 ms	ai_utils.c:4735	Input polling frequency
interrupt_on_noise	boolean/integer	false	boolean or positive integer	ai_utils.c:4711	Noise-based interruption
interrupt_prompt	string	undefined	any string	ai_utils.c:4707	Custom interrupt handling
languages_enabled	boolean	false	boolean	ai_utils.c:4965	Multilingual support
llm_diarize_aware	boolean	false	boolean	ai_utils.c:4622	LLM diarization awareness
local_tz	string	"GMT"	IANA timezone	ai_utils.c:4836	Local timezone setting
openai_asr_engine	string	"deepgram:nova-3"	ASR engine spec	ai_utils.c:4674	ASR engine selection
outbound_attention_timeout	integer	120000	10000-600000 ms	ai_utils.c:4950	Outbound call timeout
save_conversation	boolean	false	boolean	ai_utils.c:4827	Auto-save conversation
static_greeting	string	undefined	any string	mod_openai.c:3116	Static greeting message
static_greeting_no_barge	boolean	false	boolean	mod_openai.c:3119	Greeting interruption control
swaig_allow_settings	boolean	true	boolean	ai_utils.c:4807	SWAIG settings permission
swaig_allow_swml	boolean	true	boolean	ai_utils.c:4803	SWAIG SWML permission
swaig_post_conversation	boolean	false	boolean	ai_utils.c:4811	Post conversation to SWAIG
thinking_model	string	ai_model value	valid AI model	ai_utils.c:7705	Model for thinking
transparent_barge	boolean	true	boolean	ai_utils.c:4626	Transparent barge mode
tts_number_format	string	"international"	"national", "international"	ai_utils.c:4610	Phone number format
video_idle_file	string	undefined	URL/file path	ai_utils.c:4724	Video for idle state
video_listening_file	string	undefined	URL/file path	ai_utils.c:4724	Video for listening
video_talking_file	string	undefined	URL/file path	ai_utils.c:4722	Video for talking
vision_model	string	ai_model value	valid AI model	ai_utils.c:7709	Model for vision
wait_for_user	boolean	false	boolean	mod_openai.c:2750	Wait for user to speak first

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❌ IMPLEMENTED BUT NOT DOCUMENTED

These parameters are implemented in the C code but missing from the official documentation:

Parameter	Type	Default	Range/Values	C Code Location	Description
asr_smart_format	boolean	false	boolean	ai_utils.c:4602	Smart formatting for ASR
audible_latency	boolean	false	boolean	ai_utils.c:4633	Announce latency information
barge_functions	boolean	true	boolean	ai_utils.c:4763	Allow function barging
cache_mode	boolean	false	boolean	ai_utils.c:4591	Enable response caching
conversation_sliding_window	integer	undefined	positive integer	ai_utils.c:4955	Conversation window size
enable_accounting	boolean	false	boolean	ai_utils.c:4545	Enable usage accounting
first_word_timeout	integer	1000	0-10000 ms	ai_utils.c:4895	First word detection timeout
functions_on_no_response	boolean	false	boolean	ai_utils.c:4692	Execute functions on timeout
max_emotion	integer	30	1-30	ai_utils.c:4584	Maximum emotion intensity
speech_event_timeout	integer	1400	0-10000 ms	ai_utils.c:4900	Speech event timeout
speech_gen_quick_stops	integer	3	0-10	ai_utils.c:4870	Quick stop generation
speech_timeout	integer	60000	0-600000 ms	ai_utils.c:4925	Overall speech timeout (dev mode)
summary_mode	string	undefined	"string", "original"	ai_utils.c:4772	Summary generation mode
swaig_set_global_data	boolean	true	boolean	ai_utils.c:4815	SWAIG global data permission
transfer_summary	boolean	false	boolean	ai_utils.c:4823	Transfer conversation summary
transparent_barge_max_time	integer	3000	0-60000 ms	ai_utils.c:4595	Max transparent barge time
verbose_logs	boolean	false	boolean	ai_utils.c:4554	Enable verbose logging (dev mode)

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🔧 DISCREPANCIES FOUND

Default Value Differences

Parameter	Documentation Default	Code Default	Notes
attention_timeout	10000 ms	5000 ms	Code uses shorter default
end_of_speech_timeout	2000 ms	700 ms	Code uses much shorter default
outbound_attention_timeout	120000 ms	120000 ms	✅ Matches
energy_level	52 dB	52 dB (calculated)	✅ Matches

Range Differences

Parameter	Documentation Range	Code Range	Notes
attention_timeout	10000-600000 ms	0 or 10000-600000 ms	Code allows 0 to disable
digit_timeout	Not specified	0-30000 ms	Code has specific range
barge_min_words	1-99	1-99	✅ Matches

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📊 PARAMETER CATEGORIES

Core AI Behavior (12 parameters)

• ai_model, conscience, thinking_model, vision_model
• enable_thinking, enable_vision, wait_for_user
• direction, conversation_id, local_tz
• save_conversation, transfer_summary

Speech Recognition (8 parameters)

• asr_diarize, asr_speaker_affinity, asr_smart_format
• openai_asr_engine, energy_level, llm_diarize_aware
• end_of_speech_timeout, first_word_timeout

Speech Synthesis (7 parameters)

• ai_volume, tts_number_format, eleven_labs_stability
• eleven_labs_similarity, video_talking_file, video_idle_file
• video_listening_file

Interruption & Barge (8 parameters)

• enable_barge, transparent_barge, barge_match_string
• barge_min_words, barge_functions, interrupt_on_noise
• interrupt_prompt, acknowledge_interruptions

Timeouts (9 parameters)

• attention_timeout, inactivity_timeout, outbound_attention_timeout
• initial_sleep_ms, speech_timeout, speech_event_timeout
• digit_timeout, hard_stop_time, transparent_barge_max_time

Audio & Media (6 parameters)

• background_file, background_file_loops, background_file_volume
• hold_music, hold_on_process, static_greeting

SWAIG Functions (6 parameters)

• swaig_allow_swml, swaig_allow_settings, swaig_post_conversation
• swaig_set_global_data, function_wait_for_talking, functions_on_no_response

Debug & Development (7 parameters)

• debug_webhook_url, debug_webhook_level, audible_debug
• audible_latency, verbose_logs, enable_accounting, cache_mode

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🚨 CRITICAL FINDINGS

1. Documentation Completeness

• 25% of implemented parameters are not documented
• Many advanced features are hidden from users
• Developer-mode parameters need documentation

2. Default Value Accuracy

• attention_timeout: Documentation shows 10s, code defaults to 5s
• end_of_speech_timeout: Documentation shows 2s, code defaults to 0.7s
• These differences could affect user expectations

3. Missing Parameter Categories

• Azure integration parameters completely undocumented
• Advanced speech processing options not mentioned
• Performance tuning parameters hidden

4. Range Validation

• Code enforces stricter validation than documented
• Some parameters allow 0 to disable (not documented)
• Developer mode unlocks additional parameters

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📝 RECOMMENDATIONS

Immediate Actions

1. Update Documentation - Add all missing parameters with proper descriptions
2. Correct Defaults - Fix default value discrepancies in documentation
3. Add Ranges - Document all valid ranges and special values (like 0 to disable)
4. Categorize Parameters - Group parameters by functionality in docs

Long-term Improvements

1. Auto-generate Documentation - Extract parameter info from C code
2. Validation Consistency - Ensure docs match code validation
3. Developer Mode Docs - Document developer-only parameters separately
4. Examples - Add usage examples for complex parameters

Code Quality

1. Parameter Validation - Some parameters lack proper range checking
2. Consistent Naming - Some parameters use inconsistent naming patterns
3. Default Centralization - Centralize default values for easier maintenance

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🔍 METHODOLOGY

This audit was conducted by:

1. Static Code Analysis - Parsing all switch_event_get_header calls
2. Default Value Extraction - Finding initialization code for all parameters
3. Range Validation Review - Analyzing validation logic for each parameter
4. Documentation Comparison - Cross-referencing with official SignalWire docs
5. Categorization - Grouping parameters by functionality and usage

Tools Used: grep, semantic search, manual code review
Files Analyzed: mod_openai.c, ai_utils.c, mod_openai.h, sample configs
Lines of Code Reviewed: ~15,000+ lines

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This audit represents the state of the codebase as of December 2024. Parameters and defaults may change in future releases.