yoi/.yoi/tickets/00001KTN6KYY8/resolution.md

Implemented, reviewed, merged, and validated.

Summary:

• Added reusable crates/session-analytics library with analyze_session(path) -> SessionReport.
• Added thin product CLI yoi session analyze <SESSION_JSONL_PATH> --json that delegates to the library.
• Implemented tolerant streaming JSONL parsing with bounded malformed/unknown-entry diagnostics.
• Report covers tool usage counts, calls per turn, failed tool counts, repeated reads with mutation/context-lifecycle observations, edit/write churn, replace_all, large edit/result observations, saved/truncated Bash outputs, and compaction/prune/context correlations.
• Default report avoids raw user input, raw tool arguments, raw file contents, raw session snippets, and raw tool output content.
• Tests use synthetic/minimal fixtures rather than private local sessions.
• No Worker pruning/compaction, Pod protocol/history/session writer, TUI dashboard, prompt auto-fixer, or LLM summarization behavior was changed.

Implementation:

• Coder commit: c1809b3 feat: add session analytics tooling
• Reviewer approved with no blocking findings.
• Merge commit: 0d2a6a7 merge: add session analytics tooling

Validation after merge:

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