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feat: add cache-ttl pruning mode

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This commit is contained in:
Peter Steinberger
2026-01-21 19:44:20 +00:00
parent c415ccaed5
commit 9f59ff325b
18 changed files with 164 additions and 123 deletions
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23
src/agents/pi-extensions/context-pruning/settings.ts
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@@ -1,12 +1,15 @@
import { parseDurationMs } from "../../../cli/parse-duration.js";
export type ContextPruningToolMatch = {
allow?: string[];
deny?: string[];
};
export type ContextPruningMode = "off" | "adaptive" | "aggressive";
export type ContextPruningMode = "off" | "cache-ttl";
export type ContextPruningConfig = {
mode?: ContextPruningMode;
/** TTL to consider cache expired (duration string, default unit: minutes). */
ttl?: string;
keepLastAssistants?: number;
softTrimRatio?: number;
hardClearRatio?: number;
@@ -25,6 +28,7 @@ export type ContextPruningConfig = {
export type EffectiveContextPruningSettings = {
mode: Exclude<ContextPruningMode, "off">;
ttlMs: number;
keepLastAssistants: number;
softTrimRatio: number;
hardClearRatio: number;
@@ -42,7 +46,8 @@ export type EffectiveContextPruningSettings = {
};
export const DEFAULT_CONTEXT_PRUNING_SETTINGS: EffectiveContextPruningSettings = {
mode: "adaptive",
mode: "cache-ttl",
ttlMs: 5 * 60 * 1000,
keepLastAssistants: 3,
softTrimRatio: 0.3,
hardClearRatio: 0.5,
@@ -62,11 +67,19 @@ export const DEFAULT_CONTEXT_PRUNING_SETTINGS: EffectiveContextPruningSettings =
export function computeEffectiveSettings(raw: unknown): EffectiveContextPruningSettings | null {
if (!raw || typeof raw !== "object") return null;
const cfg = raw as ContextPruningConfig;
if (cfg.mode !== "adaptive" && cfg.mode !== "aggressive") return null;
if (cfg.mode !== "cache-ttl") return null;
const s: EffectiveContextPruningSettings = structuredClone(DEFAULT_CONTEXT_PRUNING_SETTINGS);
s.mode = cfg.mode;
if (typeof cfg.ttl === "string") {
try {
s.ttlMs = parseDurationMs(cfg.ttl, { defaultUnit: "m" });
} catch {
// keep default ttl
}
}
if (typeof cfg.keepLastAssistants === "number" && Number.isFinite(cfg.keepLastAssistants)) {
s.keepLastAssistants = Math.max(0, Math.floor(cfg.keepLastAssistants));
}
@@ -94,7 +107,7 @@ export function computeEffectiveSettings(raw: unknown): EffectiveContextPruningS
}
}
if (cfg.hardClear) {
if (s.mode === "adaptive" && typeof cfg.hardClear.enabled === "boolean") {
if (typeof cfg.hardClear.enabled === "boolean") {
s.hardClear.enabled = cfg.hardClear.enabled;
}
if (typeof cfg.hardClear.placeholder === "string" && cfg.hardClear.placeholder.trim()) {