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fix(coding-agent): allow threshold compaction for error messages using last successful usage, fixes #1834

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This commit is contained in:
Mario Zechner
2026-03-06 16:26:11 +01:00
parent 25c145142d
commit b8910f13ad
3 changed files with 148 additions and 6 deletions
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16
packages/coding-agent/src/core/agent-session.ts
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@@ -1731,11 +1731,17 @@ export class AgentSession {
return;
}
// Case 2: Threshold - turn succeeded but context is getting large
// Skip if this was an error (non-overflow errors don't have usage data)
if (assistantMessage.stopReason === "error") return;
const contextTokens = calculateContextTokens(assistantMessage.usage);
// Case 2: Threshold - context is getting large
// For error messages (no usage data), estimate from last successful response.
// This ensures sessions that hit persistent API errors (e.g. 529) can still compact.
let contextTokens: number;
if (assistantMessage.stopReason === "error") {
const estimate = estimateContextTokens(this.agent.state.messages);
if (estimate.lastUsageIndex === null) return; // No usage data at all
contextTokens = estimate.tokens;
} else {
contextTokens = calculateContextTokens(assistantMessage.usage);
}
if (shouldCompact(contextTokens, contextWindow, settings)) {
await this._runAutoCompaction("threshold", false);
}