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refactor(ai): replace empty buffer with min input

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- Replace ZSH_AUTOSUGGEST_ALLOW_EMPTY_BUFFER with AI_MIN_INPUT
- Add ZSH_AUTOSUGGEST_AI_DEBUG environment variable
- Add debug logging function to diagnose failures
- Update history lines default from 20 to 5
- Update pwd history preference default to no

Min input provides clearer semantics: set to 0 for empty-buffer
suggestions or higher to require minimum input. Debug logging helps
diagnose missing suggestions by showing API request flow.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
This commit is contained in:
Frad LEE 2026-02-05 14:39:12 +08:00
commit cd66c5695a
7 changed files with 142 additions and 52 deletions
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56
src/strategies/ai.zsh
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@ -35,8 +35,8 @@ _zsh_autosuggest_strategy_ai_gather_context() {
# Reset options to defaults and enable LOCAL_OPTIONS
emulate -L zsh
local max_lines="${ZSH_AUTOSUGGEST_AI_HISTORY_LINES:-20}"
local prefer_pwd="${ZSH_AUTOSUGGEST_AI_PREFER_PWD_HISTORY:-yes}"
local max_lines="${ZSH_AUTOSUGGEST_AI_HISTORY_LINES:-5}"
local prefer_pwd="${ZSH_AUTOSUGGEST_AI_PREFER_PWD_HISTORY:-no}"
local pwd_basename="${PWD:t}"
local -a context_lines
local -a pwd_lines
@ -141,6 +141,18 @@ _zsh_autosuggest_strategy_ai_normalize() {
printf '%s' "$result"
}
_zsh_autosuggest_strategy_ai_debug_log() {
# Reset options to defaults and enable LOCAL_OPTIONS
emulate -L zsh
local debug="${ZSH_AUTOSUGGEST_AI_DEBUG:-0}"
case "${debug:l}" in
0|false|no|off) return ;;
esac
print -ru2 -- "[zsh-autosuggestions ai] $1"
}
_zsh_autosuggest_strategy_ai() {
# Reset options to defaults and enable LOCAL_OPTIONS
emulate -L zsh
@ -149,14 +161,23 @@ _zsh_autosuggest_strategy_ai() {
local buffer="$1"
# Early return if API key not set (opt-in gate)
[[ -z "$ZSH_AUTOSUGGEST_AI_API_KEY" ]] && return
if [[ -z "$ZSH_AUTOSUGGEST_AI_API_KEY" ]]; then
_zsh_autosuggest_strategy_ai_debug_log "API key not set; skipping AI request."
return
fi
# Early return if curl or jq not available
[[ -z "${commands[curl]}" ]] || [[ -z "${commands[jq]}" ]] && return
if [[ -z "${commands[curl]}" ]] || [[ -z "${commands[jq]}" ]]; then
_zsh_autosuggest_strategy_ai_debug_log "Missing dependency: curl and jq are required."
return
fi
# Early return if input too short
local min_input="${ZSH_AUTOSUGGEST_AI_MIN_INPUT:-0}"
[[ ${#buffer} -lt $min_input ]] && return
local min_input="${ZSH_AUTOSUGGEST_AI_MIN_INPUT:-1}"
if [[ ${#buffer} -lt $min_input ]]; then
_zsh_autosuggest_strategy_ai_debug_log "Input shorter than ZSH_AUTOSUGGEST_AI_MIN_INPUT=$min_input."
return
fi
# Gather history context
local -a context
@ -222,6 +243,8 @@ _zsh_autosuggest_strategy_ai() {
local timeout="${ZSH_AUTOSUGGEST_AI_TIMEOUT:-5}"
local response
_zsh_autosuggest_strategy_ai_debug_log "Requesting $endpoint (model=${ZSH_AUTOSUGGEST_AI_MODEL:-gpt-3.5-turbo}, input_len=${#buffer})."
response=$(curl --silent --max-time "$timeout" \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $ZSH_AUTOSUGGEST_AI_API_KEY" \
@ -230,26 +253,39 @@ _zsh_autosuggest_strategy_ai() {
"$endpoint" 2>/dev/null)
# Check curl exit status
[[ $? -ne 0 ]] && return
local curl_status=$?
if [[ $curl_status -ne 0 ]]; then
_zsh_autosuggest_strategy_ai_debug_log "curl failed with exit code $curl_status."
return
fi
# Split response body from HTTP status
local http_code="${response##*$'\n'}"
local body="${response%$'\n'*}"
# Early return on non-2xx status
[[ "$http_code" != 2* ]] && return
if [[ "$http_code" != 2* ]]; then
_zsh_autosuggest_strategy_ai_debug_log "HTTP $http_code from AI endpoint."
return
fi
# Extract content from JSON response
local content
content=$(printf '%s' "$body" | jq -r '.choices[0].message.content // empty' 2>/dev/null)
# Early return if extraction failed
[[ -z "$content" ]] && return
if [[ -z "$content" ]]; then
_zsh_autosuggest_strategy_ai_debug_log "No suggestion content in API response."
return
fi
# Normalize response
local normalized
normalized="$(_zsh_autosuggest_strategy_ai_normalize "$content" "$buffer")"
# Set suggestion
[[ -n "$normalized" ]] && suggestion="$normalized"
if [[ -n "$normalized" ]]; then
suggestion="$normalized"
_zsh_autosuggest_strategy_ai_debug_log "AI suggestion accepted: '$normalized'."
fi
}