<!-- event: create author: LocalTicketBackend at: 2026-06-09T08:51:48Z -->

## 作成

LocalTicketBackend によって作成されました。

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<!-- event: intake_summary author: intake at: 2026-06-09T10:20:52Z -->

## Intake summary

既存 Ticket は、closed 済みの `00001KTN6KYY8` で追加された `session-analytics` 基盤への concrete follow-up として十分に具体化済み。目的は assistant response 単位の tool batching / edit round-trip 指標を JSON report に追加することで、実装対象 metrics、断定しない diagnostics 方針、非目標、受け入れ条件、テスト観点が明記されている。未決定の product/API/authority boundary はなく、Orchestrator は implementation_ready として routing できる。Reviewer focus は、response/tool-result cycle 推定の妥当性、raw content を出さない既存 analytics privacy boundary の維持、consecutive edit-only streak の過剰断定回避、既存 CLI/JSON schema との整合性。

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<!-- event: state_changed author: intake at: 2026-06-09T10:20:52Z from: planning to: ready reason: intake_ready field: state -->

## State changed

Intake で既存 Ticket の本文・thread・artifacts と関連する closed Ticket `00001KTN6KYY8` を確認した。要件は実装・レビュー・検証できる粒度まで整理済みであり、planning から ready にする。

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<!-- event: state_changed author: workspace-panel at: 2026-06-09T10:31:14Z from: ready to: queued reason: queued field: state -->

## State changed

Ticket を `workspace-panel` が queued にしました。


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<!-- event: state_changed author: orchestrator at: 2026-06-09T10:35:08Z from: queued to: inprogress reason: orchestrator_acceptance_parallel_capacity field: state -->

## State changed

Accepted queued implementation under the updated parallel-capacity policy. This Ticket extends the already-landed session analytics crate and is independent from the active ToolExecutionContext, TicketList, and Panel worktrees.

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<!-- event: decision author: orchestrator at: 2026-06-09T10:35:08Z -->

## Decision

Routing decision: implementation_ready_parallel

Reason:
- This Ticket extends `session-analytics`, a recently landed and currently inactive area.
- It is independent from active ToolExecutionContext, TicketList output, and Panel UX work.
- User asked to prefer parallel work when conflicts are absent or expected small.

IntentPacket:

Intent:
- Add assistant-response-level tool batching and edit round-trip metrics to `session-analytics` so tool-use speed patterns can be evaluated in structured JSON.

Binding decisions / invariants:
- Infer assistant response / tool-result cycle units from session JSONL as best-effort analytics.
- Add response-level tool call metrics: total responses, tool-call responses, total tool calls, avg/p50/p90/max, histogram, top responses by tool call count.
- Add edit batching metrics: Edit calls per response, responses containing Edit, same-file multiple Edit calls in one response, files touched per edit response, and correlation with large edit args where possible.
- Add consecutive edit-only response streak metrics by file/path and response range, distinguishing pure edit-only streaks from sequences broken/annotated by Read/Bash/test/result-dependent steps.
- Diagnostics must be observations such as possible batching opportunity, not blame or policy enforcement.
- Preserve existing privacy boundary: no raw user input, raw tool args, raw file contents, raw session snippets, or raw tool output content in default output.
- Do not change prompt/workflow behavior, implement EditBatch/ordered patch tools, or force batching policy.

Validation:
- Tests for single response with multiple tools.
- Tests for same-response same-file multiple Edit.
- Tests for consecutive edit-only responses to same file.
- Tests for interleaved Read/test step breaking or annotating streak.
- Tests for sessions with no edits.
- `cargo fmt --check`, `git diff --check`, `cargo run -q -p yoi -- ticket doctor`, `cargo check --workspace`, `nix build .#yoi`.

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<!-- event: implementation_report author: orchestrator at: 2026-06-09T10:36:44Z -->

## Implementation report

Implementation routing started in parallel with the current active work set.

Worktree/branch:
- Worktree: `.worktree/session-analytics-response-batching`
- Branch: `session-analytics-response-batching`
- Base/routing commit: `5d9e227 ticket: route analytics batching and parallel guidance`

Spawned sibling Coder Pod:
- `coder-session-analytics-response-batching`
- Scope: non-recursive read on parent workspace root plus recursive write limited to the child worktree.

Parallel-routing rationale:
- This extends the isolated `session-analytics` crate/CLI surface and is independent from active ToolExecutionContext/TicketList/Panel work.
- Coder was instructed to use synthetic fixtures and preserve the privacy boundary.

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<!-- event: implementation_report author: orchestrator at: 2026-06-09T10:55:20Z -->

## Implementation report

Coder implementation completed and is ready for sibling review.

Coder Pod:
- `coder-session-analytics-response-batching`
- Commit: `963db29d960d23b40e32d6b07db88f52b914a72d analytics: add response batching metrics`
- Worktree status before review: clean branch `session-analytics-response-batching`
- Stopped after collecting output to reclaim delegated worktree scope.

Response boundary design:
- Best-effort response grouping uses consecutive top-level `kind: "assistant_item"` JSONL entries as one assistant response.
- Non-assistant entries such as `tool_result`, `turn_end`, or `segment_start` close the current response group.
- Seeded `segment_start.history` is excluded from response-level metrics because exact original response boundaries are not explicit; a `response_boundary_approximation` diagnostic records this limitation.
- Metrics live under `response_batches` and remain distinct from user-turn metrics.

Implementation summary:
- Added response-level tool metrics: total responses, tool-call responses, total tool calls, avg/p50/p90/max tools per response, 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, large-argument summary fields, and `replace_all` count.
- Added consecutive edit round-trip metrics: pure same-file edit-only streaks and interrupted/annotated sequences when Read/Bash/test-like steps intervene.
- Preserved privacy boundary: no raw user input, raw tool args, raw file contents, raw session snippets, or raw tool output content in default JSON output.

Changed files:
- `crates/session-analytics/src/lib.rs`
- `crates/yoi/src/session_cli.rs`

Coder validation reported passed:
- `cargo test -p session-analytics`
- `cargo test -p yoi run_session_analyze_outputs_json`
- `cargo fmt --check`
- `git diff --check`
- `cargo run -q -p yoi -- ticket doctor`
- `cargo check --workspace`
- `nix build .#yoi`

Focused tests covered multiple tools in one response, same-response same-file edits, consecutive edit-only responses, interleaved Read/test-like Bash interruption/annotation, sessions with no edits, existing analytics behavior, and CLI JSON shape.

Residual notes:
- Response boundaries are best-effort for current JSONL shape.
- Percentile/avg output is count-based and `avg_milli` avoids floating-point JSON instability.
- Bash test detection is heuristic and only annotates interrupted edit sequences; it is not blame/policy classification.

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<!-- event: review author: reviewer at: 2026-06-09T11:03:25Z status: approve -->

## Review: approve

## Review result: approve

Reviewed commit `963db29d960d23b40e32d6b07db88f52b914a72d` against Ticket `00001KTNS9B50`.

Evidence:
- Diff scope is limited to `crates/session-analytics/src/lib.rs` and `crates/yoi/src/session_cli.rs`; no prompt, workflow, tool behavior, or batching-policy/enforcement changes were introduced.
- `SessionReport` exposes `response_batches` in JSON with response-level tool metrics, histogram/top responses, nested Edit batching metrics, and edit round-trip/annotated-sequence metrics.
- Response grouping is best-effort over contiguous top-level `assistant_item` entries; non-assistant entries close the response. Seeded `segment_start.history` tool calls are excluded from response metrics and add a `response_boundary_approximation` diagnostic.
- New observations use bounded diagnostic language such as “possible batching opportunity” / “not automatic blame”; no policy enforcement or judgment of small edits is present.
- Privacy boundary was checked with a synthetic JSONL fixture containing sentinel raw `old_string`, `new_string`, and tool output content. The JSON report preserved paths/counts/sizes/indexes and did not include the raw sentinel values.
- Tests added synthetic fixtures for response-level tool grouping, same-file multi-Edit response metrics, pure consecutive edit-only streaks, Read/Bash/test-like interrupted sequences, no-edit sessions, and CLI JSON field exposure.

Validation run from the worktree:
- `cargo test -p session-analytics`
- `cargo test -p yoi run_session_analyze_outputs_json`
- `cargo fmt --check`
- `git diff --check`
- `cargo check --workspace`
- custom synthetic JSON/privacy assertion using `target/debug/yoi session analyze --json`
- `cargo run -q -p yoi -- ticket doctor`
- `nix build .#yoi`

Residual risk:
- Assistant response boundaries remain inherently approximate because session JSONL does not carry an explicit response id; the implementation reports this for seeded history and otherwise keeps the metrics best-effort rather than authoritative.

No blocking issues found.

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<!-- event: review author: reviewer-session-analytics-response-batching at: 2026-06-09T11:04:16Z status: approve -->

## Review: approve

Review result: approve

Evidence:
- Change scope is limited to `crates/session-analytics/src/lib.rs` and `crates/yoi/src/session_cli.rs`; no prompt/workflow behavior, tool behavior, or batching policy enforcement was added.
- JSON report adds machine-readable `response_batches` fields covering response-level metrics, Edit batching metrics, and edit round-trip metrics.
- Assistant response boundary is clearly best-effort: consecutive top-level `assistant_item` entries are grouped, non-assistant entries close a response, and seeded `segment_start.history` tool calls are excluded from response-level metrics with a `response_boundary_approximation` diagnostic.
- Diagnostics are observational (`possible batching opportunity` / not automatic blame), not policy enforcement or blame for small edits.
- Synthetic privacy fixture with raw `old_string`, `new_string`, and tool output sentinel was analyzed via `yoi session analyze --json`; raw sentinel content did not appear in output. Output stays at paths/counts/sizes/indexes/line ranges.
- Tests are synthetic/minimal fixtures, not private local sessions. They cover response grouping, same-file multi-Edit, pure consecutive edit-only streaks, Read/Bash/test-like interruption, no-edit case, and CLI JSON exposure.

Reviewer validation:
- `cargo test -p session-analytics`
- `cargo test -p yoi run_session_analyze_outputs_json`
- `cargo fmt --check`
- `git diff --check`
- `cargo check --workspace`
- custom synthetic JSON/privacy assertion using `target/debug/yoi session analyze --json`
- `cargo run -q -p yoi -- ticket doctor`
- `nix build .#yoi`

Residual risk:
- Session JSONL lacks explicit response ids, so response boundaries are inherently approximate. The implementation reports this boundedly and treats the feature as best-effort analytics, which is acceptable for this Ticket.

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<!-- event: state_changed author: hare at: 2026-06-09T11:07:40Z from: inprogress to: closed reason: closed field: state -->

## State changed

Ticket を closed にしました。


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<!-- event: close author: hare at: 2026-06-09T11:07:40Z status: closed -->

## 完了

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`


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