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fix(coderd/x/chatd/chatloop): discourage doctrine in compaction summaries (#25850)

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Two additions to the compaction summary prompt:

1. Error specificity: the "errors encountered" bullet now instructs the
   model to keep error notes specific (name the file, the error, the
   fix) and not generalize from a specific failure to a blanket
   tool-avoidance rule. This addresses the doctrine crystallization
   pattern where a single tool failure gets promoted to a standing
   "avoid tool X" rule that persists across compactions and model swaps.

2. Reproducibility: a new closing sentence instructs the model to
   reference reproducible content by path, command, or URL rather than
   inlining it. Content without a stable reproducer is still preserved
   inline with a brief summary. This targets summary bloat from
   inlined code blocks (worst case: 34k chars, 76 code blocks
   reproducing repo content verbatim).

Refs CODAGT-331
This commit is contained in:
Mathias Fredriksson
2026-06-01 12:42:09 +03:00
committed by GitHub
parent 76d3181aba
commit 8b7e040105
1 changed files with 10 additions and 2 deletions
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coderd/x/chatd/chatloop/compaction.go
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@@ -35,14 +35,22 @@ const (
"- Key decisions made and their rationale\n" +
"- Concrete technical details: file paths, function names, " +
"commands, APIs, and configurations\n" +
"- Errors encountered and how they were resolved\n" +
"- Errors encountered and how they were resolved. Keep error " +
"notes specific: name the file, the error, and the fix. Do not " +
"generalize from a specific failure to a blanket tool-avoidance " +
"rule (e.g. \"tool X is unreliable\" or \"always use Y instead " +
"of Z\")\n" +
"- Current state of the work: what is DONE, what is IN PROGRESS, " +
"and what REMAINS to be done\n" +
"- The specific action the assistant was performing or about to " +
"perform when this summary was triggered\n\n" +
"Be dense and factual. Every sentence should convey essential " +
"context for continuation. Do not include pleasantries or " +
"conversational filler."
"conversational filler. For content that can be reproduced " +
"(repo files, command output, API responses), reference how to " +
"obtain it (file path, command, URL) rather than inlining the " +
"full content. Include brief inline summaries when the content " +
"itself would exceed a few lines."
defaultCompactionSystemSummaryPrefix = "The following is a summary of " +
"the earlier conversation. The assistant was actively working when " +
"the context was compacted. Continue the work described below:"