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fix(coding-agent): guard against stale kept pre-compaction usage in error-path threshold check

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This commit is contained in:
Mario Zechner
2026-03-06 16:57:06 +01:00
parent c950c692a1
commit d1a17bbae5
2 changed files with 95 additions and 1 deletions
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14
packages/coding-agent/src/core/agent-session.ts
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@@ -1736,8 +1736,20 @@ export class AgentSession {
// 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);
const messages = this.agent.state.messages;
const estimate = estimateContextTokens(messages);
if (estimate.lastUsageIndex === null) return; // No usage data at all
// Verify the usage source is post-compaction. Kept pre-compaction messages
// have stale usage reflecting the old (larger) context and would falsely
// trigger compaction right after one just finished.
const usageMsg = messages[estimate.lastUsageIndex];
if (
compactionEntry &&
usageMsg.role === "assistant" &&
(usageMsg as AssistantMessage).timestamp <= new Date(compactionEntry.timestamp).getTime()
) {
return;
}
contextTokens = estimate.tokens;
} else {
contextTokens = calculateContextTokens(assistantMessage.usage);