Yixiang Tu
bc8c0dbf40
Log tool changes as developer messages independently of model capability, fold committed headers and updates into Session.toolHistory(), and let the LLM runtime construct deferred and retained declarations for routes that declare a toolUpdate mode. DeepSeek serializes updates as system-role tool_addition/tool_removal blocks with defer_loading and the tool-changes beta header. An unchanged restored tool continues the series and is re-offered through its recorded blocks instead of rewriting declarations. Replace the obsolete rejection tests with wire assertions and add coverage for the session fold, loop emission, route projection, config validation, and the beta header. Chat and Trajectory changes land separately.
description, kind
| description | kind |
|---|---|
| Package map for the conversation-condensing feature family: automatic compaction, the on-demand /compact command, and tool-output trimming. | package-group |
compaction/ — compaction capability family
English | 中文
Summary
The compaction/ group keeps long agent conversations working near the model's context limit: older history is condensed into a summary automatically as token pressure builds, on demand with /compact, oversized tool outputs can be trimmed first so there is less to condense, and images an image-capable route can no longer send are replaced with placeholders. The shipped dsh base enables the feature by default — mount the packages explicitly to tune when and how condensation happens. The token measurement that decides when to condense lives in a separate LLM-family service.
Table of Contents
Packages
Each package below provides one piece of the feature; open a package page for how to use it.
| Package | Role | ctx key |
|---|---|---|
compaction/ |
The shared condensation contract: the operations and summary format every backend and trigger use | ctx.compaction |
compaction-basic/ |
Automatic condensation of older history into a summary as token pressure builds | registers ctx.compaction |
compaction-tool-result-pruner/ |
Trims oversized tool outputs so less history needs condensing | ctx.toolResultPruner |
compaction-image-offload/ |
Replaces over-budget request images with placeholders when an image-capable route rejects a request | listens to agent/request-error |
command-compact/ |
The /compact command to condense history on demand |
registers on ctx.commands |
Related documentation
Start with the subsystem reference for the shared vocabulary, then read the two Agent Notes for the design rationale.
- Compaction subsystem reference — the condensation vocabulary, results, and service behavior.
- Compaction capability-seam Agent Note — how the family is split and why it depends on session and LLM vocabulary.
- Queued manual compaction Agent Note — how on-demand
/compactserializes against running turns. - Capability seams — the Service Definition / Service Provider / Consumer split this family follows.
Dev Note
Working context for maintainers — click to expand
None.