yoi/.yoi/tickets/20260609-085148-001/resolution.md

Implemented, reviewed, merged, and validated.

Summary:

• Added response_batches metrics to session analytics JSON output.
• Added best-effort assistant-response grouping from consecutive top-level assistant_item JSONL entries.
• Added response-level tool metrics: total responses, tool-call responses, total tool calls, per-response stats/histogram, and top tool-call responses.
• Added Edit batching metrics: responses containing Edit, total Edit calls, calls per response, same-file multi-Edit responses, files touched per Edit response, and large-argument-compatible summaries.
• Added edit round-trip metrics for pure edit-only streaks and interrupted/annotated sequences.
• Preserved privacy boundary: no raw user input, raw tool arguments, raw file contents, raw session snippets, or raw tool output content in default output.
• Kept diagnostics as observations/correlations, not blame or policy enforcement.

Implementation:

• Coder commit: 963db29 analytics: add response batching metrics
• Reviewer approved with no blocking findings.
• Merge commit: c837fbc merge: add session analytics response batching

Validation after merge:

• cargo test -p session-analytics
• cargo test -p yoi run_session_analyze_outputs_json
• cargo fmt --check
• git diff --check
• cargo check --workspace
• cargo run -q -p yoi -- ticket doctor
• nix build .#yoi