Make it so the debug logging is more useful#152
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Pull request overview
Improves the usefulness of Copilot session debug logging by filtering noisy events and emitting richer structured attributes, with golden testdata to validate the output format.
Changes:
- Introduce
NewSessionToSlog()to filter/shape Copilot session events before logging. - Expand logged fields (model/producer/session/context + tool arguments/results) and add golden NDJSON fixtures.
- Update call sites to use the new handler and add tests that validate the produced slog JSON.
Reviewed changes
Copilot reviewed 6 out of 6 changed files in this pull request and generated 6 comments.
Show a summary per file
| File | Description |
|---|---|
| internal/utils/logging.go | Adds NewSessionToSlog() wrapper, expands logged attributes, and introduces map/group helpers. |
| internal/utils/logging_test.go | Updates existing tests and adds golden-output and helper tests for slog formatting. |
| internal/utils/testdata/sample_events.jsonl | Adds session event fixture input (NDJSON). |
| internal/utils/testdata/sample_events_slog.jsonl | Adds expected slog JSON output fixture (NDJSON). |
| internal/graders/prompt_grader.go | Switches session event handler registration to NewSessionToSlog(). |
| internal/execution/copilot.go | Switches session event handler registration to NewSessionToSlog(). |
- Omits some entries, like report_intent, that just add noise to the debugging process. Had to have some state to do this since only the tool.execution_start indicates that it's a report_intent event. - Dive into the arguments, input and context parameters, which usually contain important information. - Output the selected model, and the producer (ie: the agent)
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…does the event testing a bit to make it more readable.
spboyer
approved these changes
Mar 30, 2026
spboyer
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Looks nice improvements to debug logging. Approving.
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Prior to this we were just logging some common attributes, but were missing some important fields. We also didn't skip/omit any events, which meant the display was cluttered with things like report_intent events, etc..
We're also now diving into the arguments, input and context dictionaries, which usually contain important information and output the session chosen model and agent (ie: producer).