Source record

Published by Amp News (ampcode.com) (T1 source). The original is at https://ampcode.com/news/read-bigger-threads.

Pipeline notes

The summary and note below are generated by the signal pipeline — they are Beyond Desk’s reading, not quotations from the source.

Amp rewrote its read_thread tool as a subagent to handle long agent threads that exceed context windows. The new subagent uses GLM 5.2 with a prompt that verifies edits, checks for later revisions, and inspects original messages rather than trusting compactions.

The prompt directives for handling long-running agent threads — verifying edits, checking for revisions, inspecting originals over compactions — are reusable patterns for anyone building agent memory.

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