Bhavya U 35e83ba656 feat: add conversation transcript lookup after summarization (#4475) ...

* feat: add conversation transcript lookup after summarization

After conversation history is compacted, inform the model it can look up
the full pre-compaction transcript via read_file. The transcript is a JSONL
file produced by ISessionTranscriptService.

Key changes:
- Add isTranscriptUri() to ISessionTranscriptService for read_file allowlisting
- Allowlist transcript URIs in assertFileOkForTool and isFileExternalAndNeedsConfirmation
- Lazily start transcript session in SummarizedConversationHistory before
  summarization runs (idempotent if hooks already started it)
- After summarization, flush transcript and pass path to SummaryMessageElement
  which tells the model about the file
- Gate behind ConfigKey.ConversationTranscriptLookup (ExperimentBased, default off)
- Add setting in package.json preview section with onExp tag

* fix: update transcript lookup instruction to use ToolName.ReadFile

2026-03-18 06:06:21 +00:00

extensions/copilot

feat: add conversation transcript lookup after summarization (#4475)

2026-03-18 06:06:21 +00:00

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