* 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
* Add session transcript service for hooks
Implement JSONL-based session transcript service that records
conversation turns, tool executions, and assistant messages for
hook consumers.
Key changes:
- New ISessionTranscriptService interface and SessionTranscriptService
implementation with buffered writes and automatic old transcript cleanup
- Integrate transcript logging into tool calling loop: user messages,
assistant messages, tool execution start/complete, turn boundaries
- Auto-flush transcript and inject transcript_path into hook input
- Race flush with 500ms timeout to avoid blocking hook execution
- Gate transcript creation on ChatRequest.hasHooksEnabled
- Include copilotVersion and vscodeVersion in session.start entry
- Add timestamp to IToolCallRound for transcript timing
- Add hasHooksEnabled to ChatRequest interface and all implementors
* Fixes
Bhavya U
Rob Lourens