earendil-works/pi · error · Error

Compaction cancelled

Error message

Compaction cancelled

What it means

Error "Compaction cancelled" thrown in earendil-works/pi.

Source

Thrown at packages/coding-agent/src/core/agent-session.ts:1904

				}
				throw new Error("Nothing to compact (session too small)");
			}

			let extensionCompaction: CompactionResult | undefined;

			if (this._extensionRunner.hasHandlers("session_before_compact")) {
				const result = (await this._extensionRunner.emit({
					type: "session_before_compact",
					preparation,
					branchEntries: pathEntries,
					customInstructions,
					reason: "manual",
					willRetry: false,
					signal: this._compactionAbortController.signal,
				})) as SessionBeforeCompactResult | undefined;

				if (result?.cancel) {
					throw new Error("Compaction cancelled");
				}

				if (result?.compaction) {
					extensionCompaction = result.compaction;
					fromExtension = true;
				}
			}

			let summary: string;
			let firstKeptEntryId: string;
			let tokensBefore: number;
			let usage: Usage | undefined;
			let details: unknown;

			if (extensionCompaction) {
				// Extension provided compaction content
				summary = extensionCompaction.summary;
				firstKeptEntryId = extensionCompaction.firstKeptEntryId;

View on GitHub (pinned to 4af9d21d3b)

When it happens

Trigger: Thrown at packages/coding-agent/src/core/agent-session.ts:1904 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of earendil-works/pi@4af9d21d3b (2026-08-24). Data as JSON: /api/errors/e12022351825d521. Report an issue: GitHub.