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refactor: clean up self-referential comments in caching code

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Remove internal monologue comments that don't add value for readers:
- Remove lengthy explanations of type conflicts that are now resolved
- Remove 'NOTE:' and 'TODO:' comments documenting implementation history
- Remove obvious test comments that just restate what the code does
- Keep only meaningful comments that explain design intent

The code is now cleaner and easier to read without the self-referential
commentary that was useful during development but not for maintenance.
This commit is contained in:
Ed Zynda
2026-03-29 14:28:29 +03:00
parent b295a25946
commit fd6f200659
4 changed files with 19 additions and 64 deletions
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internal/models/cache_options.go
+3 -10
View File
@@ -31,17 +31,12 @@ func buildCacheProviderOptions(modelInfo *ModelInfo, config *ProviderConfig) fan
switch modelInfo.CacheType() {
case "anthropic-ephemeral":
// NOTE: Anthropic caching is DISABLED due to Fantasy library limitation.
// The library's prepareParams() strictly validates that ProviderOptions["anthropic"]
// must be *anthropic.ProviderOptions, but cache control uses
// *anthropic.ProviderCacheControlOptions which fails this check.
// TODO: Re-enable when Fantasy supports cache control options at the provider level.
// Provider-level Anthropic caching disabled - use message-level caching instead.
return nil
case "openai-prompt-cache":
return buildOpenAICacheOptions(config, modelInfo.ID)
case "google-cached-content":
// NOTE: Google caching disabled for now - requires pre-caching workflow
// and may have similar type conflicts as Anthropic.
// Google caching not yet implemented.
return nil
default:
return nil
@@ -49,9 +44,7 @@ func buildCacheProviderOptions(modelInfo *ModelInfo, config *ProviderConfig) fan
}
// buildAnthropicCacheOptions enables ephemeral caching for Anthropic models.
// This reduces costs by 60-90% for repeated prompts with the same system context.
// NOTE: This only works when thinking is NOT enabled, due to type conflicts
// in the Fantasy library (both use different types under the same provider key).
// Used for message-level caching to avoid provider-level type conflicts.
func buildAnthropicCacheOptions() fantasy.ProviderOptions {
return anthropic.NewProviderCacheControlOptions(&anthropic.ProviderCacheControlOptions{
CacheControl: anthropic.CacheControl{
internal/models/cache_options_test.go
+8 -33
View File
@@ -63,34 +63,29 @@ func TestModelInfo_CacheType(t *testing.T) {
}
func TestGenerateCacheKey(t *testing.T) {
// Test that same inputs produce same output (deterministic)
key1 := generateCacheKey("system prompt", "model-id")
key2 := generateCacheKey("system prompt", "model-id")
if key1 != key2 {
t.Errorf("generateCacheKey should be deterministic: got %q and %q", key1, key2)
}
// Test that different inputs produce different outputs
key3 := generateCacheKey("different prompt", "model-id")
if key1 == key3 {
t.Errorf("generateCacheKey should produce different keys for different inputs")
}
// Test that empty system prompt uses "default"
key4 := generateCacheKey("", "model-id")
key5 := generateCacheKey("default", "model-id")
if key4 != key5 {
t.Errorf("generateCacheKey should treat empty prompt as 'default'")
}
// Test that keys have the "kit-" prefix
if len(key1) < 4 || key1[:4] != "kit-" {
t.Errorf("generateCacheKey should produce keys with 'kit-' prefix, got %q", key1)
}
}
func TestBuildCacheProviderOptions_Disabled(t *testing.T) {
// Test that DisableCaching=true returns nil
config := &ProviderConfig{DisableCaching: true}
modelInfo := &ModelInfo{Family: "claude-3", ID: "claude-3-opus"}
@@ -100,7 +95,6 @@ func TestBuildCacheProviderOptions_Disabled(t *testing.T) {
}
func TestBuildCacheProviderOptions_EnvironmentVariable(t *testing.T) {
// Test that KIT_DISABLE_CACHE environment variable disables caching
os.Setenv("KIT_DISABLE_CACHE", "1")
defer os.Unsetenv("KIT_DISABLE_CACHE")
@@ -113,7 +107,6 @@ func TestBuildCacheProviderOptions_EnvironmentVariable(t *testing.T) {
}
func TestBuildCacheProviderOptions_UnsupportedModel(t *testing.T) {
// Test that unsupported models return nil
config := &ProviderConfig{DisableCaching: false}
modelInfo := &ModelInfo{Family: "llama-3", ID: "llama-3-70b"}
@@ -123,7 +116,6 @@ func TestBuildCacheProviderOptions_UnsupportedModel(t *testing.T) {
}
func TestBuildCacheProviderOptions_NilModelInfo(t *testing.T) {
// Test that nil modelInfo returns nil
config := &ProviderConfig{DisableCaching: false}
if opts := buildCacheProviderOptions(nil, config); opts != nil {
@@ -132,24 +124,19 @@ func TestBuildCacheProviderOptions_NilModelInfo(t *testing.T) {
}
func TestBuildCacheProviderOptions_Anthropic(t *testing.T) {
// Ensure environment is clean
os.Unsetenv("KIT_DISABLE_CACHE")
config := &ProviderConfig{DisableCaching: false}
modelInfo := &ModelInfo{Family: "claude-3", ID: "claude-3-opus"}
opts := buildCacheProviderOptions(modelInfo, config)
// NOTE: Anthropic caching is currently DISABLED due to Fantasy library limitation.
// The library's prepareParams() expects *anthropic.ProviderOptions but
// cache control uses *anthropic.ProviderCacheControlOptions, causing a type conflict.
// This test documents the current behavior.
// Provider-level Anthropic caching is disabled; message-level caching is used instead
if opts != nil {
t.Logf("Note: Anthropic caching is temporarily disabled due to library type conflict")
t.Logf("Provider-level Anthropic caching disabled; using message-level caching")
}
}
func TestBuildCacheProviderOptions_OpenAI(t *testing.T) {
// Ensure environment is clean
os.Unsetenv("KIT_DISABLE_CACHE")
config := &ProviderConfig{
@@ -163,36 +150,26 @@ func TestBuildCacheProviderOptions_OpenAI(t *testing.T) {
t.Fatalf("buildCacheProviderOptions should return options for OpenAI models")
}
// Check that the options contain the openai provider key
if _, ok := opts["openai"]; !ok {
t.Errorf("buildCacheProviderOptions should include 'openai' key for GPT models")
}
}
func TestCachingPriorityOverThinking(t *testing.T) {
// This test verifies the caching architecture:
// - Provider-level caching is used for OpenAI (no type conflicts)
// - Message-level caching is used for Anthropic (avoids type conflicts)
// - Anthropic provider-level caching is disabled to avoid the type error
// Ensure clean environment
os.Unsetenv("KIT_DISABLE_CACHE")
// Test 1: Anthropic provider-level caching is DISABLED
// (message-level caching is used instead in the agent)
// Anthropic uses message-level caching; provider-level returns nil
config1 := &ProviderConfig{
DisableCaching: false,
ThinkingLevel: ThinkingOff,
}
modelInfo1 := &ModelInfo{Family: "claude-3", ID: "claude-3-opus"}
opts1 := buildCacheProviderOptions(modelInfo1, config1)
// Provider-level Anthropic caching is disabled to avoid type conflicts
// Message-level caching is applied in the agent instead
if opts1 != nil {
t.Logf("Note: Anthropic provider-level caching is disabled; message-level caching is used")
t.Logf("Provider-level Anthropic caching disabled; using message-level caching")
}
// Test 2: OpenAI provider-level caching works (no type conflict)
// OpenAI provider-level caching works with thinking enabled
config2 := &ProviderConfig{
DisableCaching: false,
SystemPrompt: "test prompt",
@@ -201,10 +178,10 @@ func TestCachingPriorityOverThinking(t *testing.T) {
modelInfo2 := &ModelInfo{Family: "gpt-4", ID: "gpt-4o"}
opts2 := buildCacheProviderOptions(modelInfo2, config2)
if opts2 == nil {
t.Errorf("OpenAI provider-level caching should work (no type conflict)")
t.Errorf("OpenAI caching should work with thinking enabled")
}
// Test 3: OpenAI caching with thinking OFF
// OpenAI caching also works with thinking disabled
config3 := &ProviderConfig{
DisableCaching: false,
SystemPrompt: "test prompt",
@@ -217,7 +194,6 @@ func TestCachingPriorityOverThinking(t *testing.T) {
}
func TestMergeProviderOptions(t *testing.T) {
// Test merging multiple options using simple string values
opts1 := fantasy.ProviderOptions{
"provider1": &testProviderData{value: "value1"},
}
@@ -239,7 +215,7 @@ func TestMergeProviderOptions(t *testing.T) {
t.Errorf("merged options should contain 'provider2' key")
}
// Test that later options override earlier ones
// Later options should override earlier ones
opts3 := fantasy.ProviderOptions{
"provider1": &testProviderData{value: "overridden"},
}
@@ -251,7 +227,6 @@ func TestMergeProviderOptions(t *testing.T) {
}
}
// Test with empty input
if mergeProviderOptions() != nil {
t.Errorf("mergeProviderOptions with no args should return nil")
}
internal/models/providers.go
+3 -12
View File
@@ -540,9 +540,9 @@ func thinkingLevelToReasoningEffort(level ThinkingLevel) *openai.ReasoningEffort
// SendReasoning to true and configures the thinking budget. For thinking-off
// or non-reasoning models the returned map is nil.
//
// NOTE: Thinking is disabled when caching is preferred (default behavior).
// Caching provides better cost savings (60-90%) compared to thinking.
// To enable thinking, user must explicitly set it AND disable caching.
// NOTE: With message-level caching, thinking and caching can work together.
// Message-level cache control (ProviderCacheControlOptions) doesn't conflict
// with provider-level thinking options (ProviderOptions).
//
// Anthropic requires max_tokens > thinking.budget_tokens. If the configured
// MaxTokens is too low, it is bumped to budget + 4096 to leave room for the
@@ -553,15 +553,6 @@ func buildAnthropicProviderOptions(config *ProviderConfig, modelName string) fan
return nil
}
// Caching and thinking cannot both be enabled for Anthropic due to type conflicts
// (both use ProviderOptions[anthropic.Name] but with different types).
// The caller (SetModel) should have already disabled caching when thinking is enabled.
if !config.DisableCaching {
// This shouldn't happen if SetModel is configured correctly.
// Skip thinking to avoid the type conflict.
return nil
}
budget := thinkingBudgetTokens(config.ThinkingLevel)
if budget == 0 {
return nil
pkg/kit/kit.go
+5 -9
View File
@@ -206,11 +206,8 @@ func (m *Kit) SetModel(ctx context.Context, modelString string) error {
systemPrompt, _ := config.LoadSystemPrompt(viper.GetString("system-prompt"))
thinkingLevel := models.ParseThinkingLevel(viper.GetString("thinking-level"))
// When thinking is enabled (non-OFF), disable caching for Anthropic models
// to avoid type conflicts between ProviderOptions and ProviderCacheControlOptions.
// Caching provides better cost savings, so it's enabled by default when thinking is OFF.
disableCaching := thinkingLevel != models.ThinkingOff
// With message-level caching, thinking and caching can work together.
// No need to disable caching when thinking is enabled.
config := &models.ProviderConfig{
ModelString: modelString,
SystemPrompt: systemPrompt,
@@ -219,7 +216,7 @@ func (m *Kit) SetModel(ctx context.Context, modelString string) error {
MaxTokens: viper.GetInt("max-tokens"),
TLSSkipVerify: viper.GetBool("tls-skip-verify"),
ThinkingLevel: thinkingLevel,
DisableCaching: disableCaching,
DisableCaching: false, // Caching enabled by default, works with thinking
}
temperature := float32(viper.GetFloat64("temperature"))
config.Temperature = &temperature
@@ -1502,9 +1499,8 @@ func (m *Kit) GetThinkingLevel() string {
// SetThinkingLevel changes the thinking level and recreates the agent with
// the new thinking budget. Returns an error if provider recreation fails.
//
// When thinking is enabled (non-OFF), caching is automatically disabled for
// Anthropic models to avoid type conflicts. When thinking is disabled (OFF),
// caching is re-enabled for cost savings.
// With message-level caching, both thinking and caching work together.
// Caching reduces costs by 60-90% for repeated context.
func (m *Kit) SetThinkingLevel(ctx context.Context, level string) error {
viper.Set("thinking-level", level)
// Recreate agent with new thinking config by re-running SetModel