LLM Context Compressor · Rust同样的上下文,
同样的上下文,
更少的 token
发给模型之前,把日志、JSON、diff、搜索结果先压一遍:错误保留、样板折叠、 冻结前缀一字节不动,有损内容随时可还原。省下的是每一轮的 token 与缓存成本。
看压缩效果 →npm i
@agent-context/siftLive Demo
真实压缩核心 · 输出未修饰亲手压一压
结构化监控数据(schema 去重 + 采样,关键行保留)
原始输入12.6 KB
压缩输出9.5 KB
原始输入
[
{
"id": "svc-001",
"name": "service-1",
"region": "us-west-2",
"status": "ok",
"latency_ms": 49,
"error_rate": 0.15,
"replicas": 3,
"version": "2.1.1",
"last_deploy": "2026-08-02T01:15:00Z",
"owner": "team-beta"
},
{
"id": "svc-002",
"name": "service-2",
"region": "eu-central-1",
"status": "ok",
"latency_ms": 86,
"error_rate": 0.3,
"replicas": 4,
"version": "2.2.2",
"last_deploy": "2026-08-03T02:15:00Z",
"owner": "team-gamma"
},
{
"id": "svc-003",
"name": "service-3",
"region": "ap-southeast-1",
"status": "degraded",
"latency_ms": 123,
"error_rate": 0.44999999999999996,
"replicas": 5,
"version": "2.3.3",
"last_deploy": "2026-08-04T03:15:00Z",
"owner": "team-alpha"
},
{
"id": "svc-004",
"name": "service-4",
"region": "us-east-1",
"status": "ok",
"latency_ms": 160,
"error_rate": 0.6,
"replicas": 6,
"version": "2.4.4",
"last_deploy": "2026-08-05T04:15:00Z",
"owner": "team-beta"
},
{
"id": "svc-005",
"name": "service-5",
"region": "us-west-2",
"status": "error",
"latency_ms": 197,
"error_rate": 0.75,
"replicas": 2,
"version": "2.5.5",
"last_deploy": "2026-08-06T05:15:00Z",
"owner": "team-gamma"
},
{
"id": "svc-006",
"name": "service-6",
"region": "eu-central-1",
"status": "ok",
"latency_ms": 234,
"error_rate": 0.8999999999999999,
"replicas": 3,
"version": "2.6.6",
"last_deploy": "2026-08-07T06:15:00Z",
"owner": "team-alpha"
},
{
"id": "svc-007",
"name": "service-7",
"region": "ap-southeast-1",
"status": "ok",
"latency_ms": 271,
"error_rate": 0,
"replicas": 4,
"version": "2.7.7",
"last_deploy": "2026-08-08T07:15:00Z",
"owner": "team-beta"
},
{
"id": "svc-008",
"name": "service-8",
"region": "us-east-1",
"status": "ok",
"latency_ms": 308,
"error_rate": 0.15,
"replicas": 5,
"version": "2.8.8",
"last_deploy": "2026-08-09T08:15:00Z",
"owner": "team-gamma"
},
{
"id": "svc-009",
"name": "service-9",
"region": "us-west-2",
"status": "degraded",
"latency_ms": 345,
"error_rate": 0.3,
"replicas": 6,
"version": "2.0.9",
"last_deploy": "2026-08-10T09:15:00Z",
"owner": "team-alpha"
},
{
"id": "svc-010",
"name": "service-10",
"region": "eu-central-1",
"status": "ok",
"latency_ms": 382,
"error_rate": 0.44999999999999996,
"replicas": 2,
"version": "2.1.10",
"last_deploy": "2026-08-11T00:15:00Z",
"owner": "team-beta"
},
{
"id": "svc-011",
"name": "service-11",
"region": "ap-southeast-1",
"status": "error",
"latency_ms": 419,
"error_rate": 0.6,
"replicas": 3,
"version": "2.2.11",
"last_deploy": "2026-08-12T01:15:00Z",
"owner": "team-gamma"
},
{
"id": "svc-012",
"name": "service-12",
"region": "us-east-1",
"status": "ok",
"latency_ms": 456,
"error_rate": 0.75,
"replicas": 4,
"version": "2.3.12",
"last_deploy": "2026-08-13T02:15:00Z",
"owner": "team-alpha"
},
{
"id": "svc-013",
"name": "service-13",
"region": "us-west-2",
"status": "ok",
"latency_ms": 13,
"error_rate": 0.8999999999999999,
"replicas": 5,
"version": "2.4.0",
"last_deploy": "2026-08-14T03:15:00Z",
"owner": "team-beta"
},
{
"id": "svc-014",
"name": "service-14",
"region": "eu-central-1",
"status": "ok",
"latency_ms": 50,
"error_rate": 0,
"replicas": 6,
"version": "2.5.1",
"last_deploy": "2026-08-15T04:15:00Z",
"owner": "team-gamma"
},
{
"id": "svc-015",
"name": "service-15",
"region": "ap-southeast-1",
"status": "degraded",
"latency_ms": 87,
"error_rate": 0.15,
"replicas": 2,
"version": "2.6.2",
"last_deploy": "2026-08-16T05:15:00Z",
"owner": "team-alpha"
},
{
"id": "svc-016",
"name": "service-16",
"region": "us-east-1",
"status": "ok",
"latency_ms": 124,
"error_rate": 0.3,
"replicas": 3,
"version": "2.7.3",
"last_deploy": "2026-08-17T06:15:00Z",
"owner": "team-beta"
},
{
"id": "svc-017",
"name": "service-17",
"region": "us-west-2",
"status": "error",
"latency_ms": 161,
"error_rate": 0.44999999999999996,
"replicas": 4,
"version": "2.8.4",
"last_deploy": "2026-08-18T07:15:00Z",
"owner": "team-gamma"
},
{
"id": "svc-018",
"name": "service-18",
"region": "eu-central-1",
"status": "ok",
"latency_ms": 198,
"error_rate": 0.6,
"replicas": 5,
"version": "2.0.5",
"last_deploy": "2026-08-19T08:15:00Z",
"owner": "team-alpha"
},
{
"id": "svc-019",
"name": "service-19",
"region": "ap-southeast-1",
"status": "ok",
"latency_ms": 235,
"error_rate": 0.75,
"replicas": 6,
"version": "2.1.6",
"last_deploy": "2026-08-20T09:15:00Z",
"owner": "team-beta"
},
{
"id": "svc-020",
"name": "service-20",
"region": "us-east-1",
"status": "ok",
"latency_ms": 272,
"error_rate": 0.8999999999999999,
"replicas": 2,
"version": "2.2.7",
"last_deploy": "2026-08-21T00:15:00Z",
"owner": "team-gamma"
},
{
"id": "svc-021",
"name": "service-21",
"region": "us-west-2",
"status": "degraded",
"latency_ms": 309,
"error_rate": 0,
"replicas": 3,
"version": "2.3.8",
"last_deploy": "2026-08-01T01:15:00Z",
"owner": "team-alpha"
},
{
"id": "svc-022",
"name": "service-22",
"region": "eu-central-1",
"status": "ok",
"latency_ms": 346,
"error_rate": 0.15,
"replicas": 4,
"version": "2.4.9",
"last_deploy": "2026-08-02T02:15:00Z",
"owner": "team-beta"
},
{
"id": "svc-023",
"name": "service-23",
"region": "ap-southeast-1",
"status": "error",
"latency_ms": 383,
"error_rate": 0.3,
"replicas": 5,
"version": "2.5.10",
"last_deploy": "2026-08-03T03:15:00Z",
"owner": "team-gamma"
},
{
"id": "svc-024",
"name": "service-24",
"region": "us-east-1",
"status": "ok",
"latency_ms": 420,
"error_rate": 0.44999999999999996,
"replicas": 6,
"version": "2.6.11",
"last_deploy": "2026-08-04T04:15:00Z",
"owner": "team-alpha"
},
{
"id": "svc-025",
"name": "service-25",
"region": "us-west-2",
"status": "ok",
"latency_ms": 457,
"error_rate": 0.6,
"replicas": 2,
"version": "2.7.12",
"last_deploy": "2026-08-05T05:15:00Z",
"owner": "team-beta"
},
{
"id": "svc-026",
"name": "service-26",
"region": "eu-central-1",
"status": "ok",
"latency_ms": 14,
"error_rate": 0.75,
"replicas": 3,
"version": "2.8.0",
"last_deploy": "2026-08-06T06:15:00Z",
"owner": "team-gamma"
},
{
"id": "svc-027",
"name": "service-27",
"region": "ap-southeast-1",
"status": "degraded",
"latency_ms": 51,
"error_rate": 0.8999999999999999,
"replicas": 4,
"version": "2.0.1",
"last_deploy": "2026-08-07T07:15:00Z",
"owner": "team-alpha"
},
{
"id": "svc-028",
"name": "service-28",
"region": "us-east-1",
"status": "ok",
"latency_ms": 88,
"error_rate": 0,
"replicas": 5,
"version": "2.1.2",
"last_deploy": "2026-08-08T08:15:00Z",
"owner": "team-beta"
},
{
"id": "svc-029",
"name": "service-29",
"region": "us-west-2",
"status": "error",
"latency_ms": 125,
"error_rate": 0.15,
"replicas": 6,
"version": "2.2.3",
"last_deploy": "2026-08-09T09:15:00Z",
"owner": "team-gamma"
},
{
"id": "svc-030",
"name": "service-30",
"region": "eu-central-1",
"status": "ok",
"latency_ms": 162,
"error_rate": 0.3,
"replicas": 2,
"version": "2.3.4",
"last_deploy": "2026-08-10T00:15:00Z",
"owner": "team-alpha"
},
{
"id": "svc-031",
"name": "service-31",
"region": "ap-southeast-1",
"status": "ok",
"latency_ms": 199,
"error_rate": 0.44999999999999996,
"replicas": 3,
"version": "2.4.5",
"last_deploy": "2026-08-11T01:15:00Z",
"owner": "team-beta"
},
{
"id": "svc-032",
"name": "service-32",
"region": "us-east-1",
"status": "ok",
"latency_ms": 236,
"error_rate": 0.6,
"replicas": 4,
"version": "2.5.6",
"last_deploy": "2026-08-12T02:15:00Z",
"owner": "team-gamma"
},
{
"id": "svc-033",
"name": "service-33",
"region": "us-west-2",
"status": "degraded",
"latency_ms": 273,
"error_rate": 0.75,
"replicas": 5,
"version": "2.6.7",
"last_deploy": "2026-08-13T03:15:00Z",
"owner": "team-alpha"
},
{
"id": "svc-034",
"name": "service-34",
"region": "eu-central-1",
"status": "ok",
"latency_ms": 310,
"error_rate": 0.8999999999999999,
"replicas": 6,
"version": "2.7.8",
"last_deploy": "2026-08-14T04:15:00Z",
"owner": "team-beta"
},
{
"id": "svc-035",
"name": "service-35",
"region": "ap-southeast-1",
"status": "error",
"latency_ms": 347,
"error_rate": 0,
"replicas": 2,
"version": "2.8.9",
"last_deploy": "2026-08-15T05:15:00Z",
"owner": "team-gamma"
},
{
"id": "svc-036",
"name": "service-36",
"region": "us-east-1",
"status": "ok",
"latency_ms": 384,
"error_rate": 0.15,
"replicas": 3,
"version": "2.0.10",
"last_deploy": "2026-08-16T06:15:00Z",
"owner": "team-alpha"
},
{
"id": "svc-037",
"name": "service-37",
"region": "us-west-2",
"status": "ok",
"latency_ms": 421,
"error_rate": 0.3,
"replicas": 4,
"version": "2.1.11",
"last_deploy": "2026-08-17T07:15:00Z",
"owner": "team-beta"
},
{
"id": "svc-038",
"name": "service-38",
"region": "eu-central-1",
"status": "ok",
"latency_ms": 458,
"error_rate": 0.44999999999999996,
"replicas": 5,
"version": "2.2.12",
"last_deploy": "2026-08-18T08:15:00Z",
"owner": "team-gamma"
},
{
"id": "svc-039",
"name": "service-39",
"region": "ap-southeast-1",
"status": "degraded",
"latency_ms": 15,
"error_rate": 0.6,
"replicas": 6,
"version": "2.3.0",
"last_deploy": "2026-08-19T09:15:00Z",
"owner": "team-alpha"
},
{
"id": "svc-040",
"name": "service-40",
"region": "us-east-1",
"status": "ok",
"latency_ms": 52,
"error_rate": 0.75,
"replicas": 2,
"version": "2.4.1",
"last_deploy": "2026-08-20T00:15:00Z",
"owner": "team-beta"
},
{
"id": "svc-041",
"name": "service-41",
"region": "us-west-2",
"status": "error",
"latency_ms": 89,
"error_rate": 0.8999999999999999,
"replicas": 3,
"version": "2.5.2",
"last_deploy": "2026-08-21T01:15:00Z",
"owner": "team-gamma"
},
{
"id": "svc-042",
"name": "service-42",
"region": "eu-central-1",
"status": "ok",
"latency_ms": 126,
"error_rate": 0,
"replicas": 4,
"version": "2.6.3",
"last_deploy": "2026-08-01T02:15:00Z",
"owner": "team-alpha"
},
{
"id": "svc-043",
"name": "service-43",
"region": "ap-southeast-1",
"status": "ok",
"latency_ms": 163,
"error_rate": 0.15,
"replicas": 5,
"version": "2.7.4",
"last_deploy": "2026-08-02T03:15:00Z",
"owner": "team-beta"
},
{
"id": "svc-044",
"name": "service-44",
"region": "us-east-1",
"status": "ok",
"latency_ms": 200,
"error_rate": 0.3,
"replicas": 6,
"version": "2.8.5",
"last_deploy": "2026-08-03T04:15:00Z",
"owner": "team-gamma"
},
{
"id": "svc-045",
"name": "service-45",
"region": "us-west-2",
"status": "degraded",
"latency_ms": 237,
"error_rate": 0.44999999999999996,
"replicas": 2,
"version": "2.0.6",
"last_deploy": "2026-08-04T05:15:00Z",
"owner": "team-alpha"
},
{
"id": "svc-046",
"name": "service-46",
"region": "eu-central-1",
"status": "ok",
"latency_ms": 274,
"error_rate": 0.6,
"replicas": 3,
"version": "2.1.7",
"last_deploy": "2026-08-05T06:15:00Z",
"owner": "team-beta"
},
{
"id": "svc-047",
"name": "service-47",
"region": "ap-southeast-1",
"status": "error",
"latency_ms": 311,
"error_rate": 0.75,
"replicas": 4,
"version": "2.2.8",
"last_deploy": "2026-08-06T07:15:00Z",
"owner": "team-gamma"
},
{
"id": "svc-048",
"name": "service-48",
"region": "us-east-1",
"status": "ok",
"latency_ms": 348,
"error_rate": 0.8999999999999999,
"replicas": 5,
"version": "2.3.9",
"last_deploy": "2026-08-07T08:15:00Z",
"owner": "team-alpha"
}
]压缩输出
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RULE 01
只在消息内压缩
绝不跨消息丢弃内容。每条消息独立处理,tool_use / tool_result 配对受保护,对话结构永远完整。
RULE 02
冻结前缀字节不动
cache_control 标记以下的消息是 prompt cache 锚点,一个字节都不动 —— 压缩不破坏你的缓存命中。
RULE 03
有损必须可恢复
有损压缩的原文进 stash store,输出留 «stash:HASH» 标记,随时取回,端到端无损。