lean-ctx 3.9.17

Context Runtime for AI Agents with CCP. 71 MCP tools, 10 read modes, 95+ compression patterns, cross-session memory (CCP), persistent AI knowledge with temporal facts + contradiction detection, multi-agent context sharing, LITM-aware positioning, AAAK compact format, adaptive compression with Thompson Sampling bandits. Supports 24+ AI tools. Reduces LLM token consumption by up to 99%.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155

#[cfg(test)]
mod tests {
    use super::super::provider_parity::{detect_provider, envelope_from_usage};
    use super::super::token_envelope::ProviderKind;
    use serde_json::json;

    #[test]
    fn openai_standard() {
        let provider = detect_provider("https://api.openai.com/v1/chat/completions");
        assert_eq!(provider, ProviderKind::OpenAi);

        let envelope = envelope_from_usage(
            ProviderKind::OpenAi,
            "gpt-4",
            &json!({"prompt_tokens": 150, "completion_tokens": 80}),
        );
        assert_eq!(envelope.input_tokens, 150);
        assert_eq!(envelope.output_tokens, 80);
    }

    #[test]
    fn openai_with_cache() {
        let envelope = envelope_from_usage(
            ProviderKind::OpenAi,
            "gpt-4",
            &json!({
                "prompt_tokens": 200,
                "completion_tokens": 50,
                "prompt_tokens_details": {"cached_tokens": 100}
            }),
        );

        assert_eq!(envelope.cache_read_tokens, 100);
    }

    #[test]
    fn openai_with_reasoning() {
        let envelope = envelope_from_usage(
            ProviderKind::OpenAi,
            "gpt-4",
            &json!({
                "prompt_tokens": 100,
                "completion_tokens": 500,
                "completion_tokens_details": {"reasoning_tokens": 400}
            }),
        );

        assert_eq!(envelope.reasoning_tokens, 400);
    }

    #[test]
    fn anthropic_standard() {
        let provider = detect_provider("https://api.anthropic.com/v1/messages");
        assert_eq!(provider, ProviderKind::Anthropic);

        let envelope = envelope_from_usage(
            ProviderKind::Anthropic,
            "claude",
            &json!({"input_tokens": 120, "output_tokens": 60}),
        );
        assert_eq!(envelope.input_tokens, 120);
        assert_eq!(envelope.output_tokens, 60);
    }

    #[test]
    fn anthropic_with_cache() {
        let envelope = envelope_from_usage(
            ProviderKind::Anthropic,
            "claude",
            &json!({
                "input_tokens": 200,
                "output_tokens": 50,
                "cache_read_input_tokens": 80,
                "cache_creation_input_tokens": 30
            }),
        );

        assert_eq!(envelope.cache_read_tokens, 80);
        assert_eq!(envelope.cache_write_tokens, 30);
    }

    #[test]
    fn gemini_usage() {
        let provider = detect_provider("https://generativelanguage.googleapis.com");
        assert_eq!(provider, ProviderKind::Gemini);

        let envelope = envelope_from_usage(
            ProviderKind::Gemini,
            "gemini",
            &json!({
                "promptTokenCount": 100,
                "candidatesTokenCount": 40,
                "cachedContentTokenCount": 20
            }),
        );
        assert_eq!(envelope.input_tokens, 100);
        assert_eq!(envelope.output_tokens, 40);
        assert_eq!(envelope.cache_read_tokens, 20);
    }

    #[test]
    fn bedrock_usage() {
        let provider = detect_provider("https://bedrock-runtime.us-east-1.amazonaws.com");
        assert_eq!(provider, ProviderKind::Bedrock);

        let envelope = envelope_from_usage(
            ProviderKind::Bedrock,
            "bedrock",
            &json!({"inputTokens": 90, "outputTokens": 30}),
        );
        assert_eq!(envelope.input_tokens, 90);
        assert_eq!(envelope.output_tokens, 30);
    }

    #[test]
    fn azure_openai() {
        let provider = detect_provider("https://my-resource.openai.azure.com");
        assert_eq!(provider, ProviderKind::Azure);

        let envelope = envelope_from_usage(
            ProviderKind::Azure,
            "gpt-4",
            &json!({"prompt_tokens": 100, "completion_tokens": 50}),
        );
        assert_eq!(envelope.input_tokens, 100);
        assert_eq!(envelope.output_tokens, 50);
    }

    #[test]
    fn empty_usage_no_panic() {
        let envelope = envelope_from_usage(ProviderKind::Unknown, "x", &json!({}));

        assert_eq!(envelope.provider, ProviderKind::Unknown);
        assert_eq!(envelope.input_tokens, 0);
        assert_eq!(envelope.output_tokens, 0);
        assert_eq!(envelope.cache_read_tokens, 0);
        assert_eq!(envelope.cache_write_tokens, 0);
        assert_eq!(envelope.reasoning_tokens, 0);
    }

    #[test]
    fn null_fields_safe() {
        let envelope = envelope_from_usage(
            ProviderKind::OpenAi,
            "gpt-4",
            &json!({
                "prompt_tokens": null,
                "completion_tokens": "not_a_number"
            }),
        );

        assert_eq!(envelope.input_tokens, 0);
        assert_eq!(envelope.output_tokens, 0);
    }
}