Session performance for Claude and Codex

Traceability

• Spec ID: session-performance-native-timing
• Status: Implemented; local validation
• Request: desktop Electron Performance must time retained Codex and Claude sessions, not only Qoder.

Intent

The Performance workbench times Claude Code transcripts and Codex rollouts with the same pairing rules as Qoder. Desktop macOS must run that reader through the Evidence NSXPC host. Catalog ranking stays bounded. Codex must not count the same exec twice, must share session identity with Sessions discovery, and must not use harness preamble as a title.

Acceptance scenarios

• AC-1: A workspace Claude transcript and a workspace Codex rollout appear in the Performance catalog with claude:<id> / codex:<id> and non-empty timing (wall or longest), not as no-evidence.
• AC-2: Detail for those ids returns paired model/tool/shell intervals. Codex payload.id is the catalog id even when payload.session_id differs, matching sessions.discover.
• AC-3: When a rollout has item_completed CommandExecution, exec / function_call stream copies of the same work are not also counted as tools. A wait call that has no item still remains.
• AC-4: A user message that starts with You are running under harness revision keeps only the text after the policy block as the title. A message that is only that block does not become the title.
• AC-5: Catalog analysis is globally capped at maxSessions (default 200, max 500) across Qoder+Claude+Codex, not 200 per provider. Catalog rows do not run tool-phase / subagent linking. The browser contract still rejects more than 500 catalog sessions.
• AC-6: macOS desktop Evidence XPC (Harness Evidence.app) embeds a host that contains the Claude/Codex reader, not the older Qoder-only binary.

Non-goals

Cursor/Copilot/other hosts, changing Qoder pairing semantics, installing a release build, rewriting Sessions discovery, or editing Codex/Claude files.

Plan and tasks

1. Restore unrelated Playwright deletions from this working tree.
2. Align Codex performance ids with platforms/codex.rs (payload.id first).
3. Skip stream exec tools when CommandExecution items exist; strip harness revision preambles from titles.
4. Rank all providers by mtime, analyse only the global cap, and summarise catalog rows without wait-phase linking.
5. Rebuild and stage Harness Evidence.app so Electron NSXPC serves the new host.

Test and review evidence

• AC-1/2/3/4/5: evidence-host lib tests 36 passed, including native_transcripts_are_measured_by_the_same_rules_and_stay_namespaced (id alignment, exec not doubled, wait kept, harness title, global cap). Studio session-timing-api.test.ts 13 passed, including namespaced detail and a 500/501 catalog contract bound.
• AC-6: Harness Evidence.app XPC host restaged 2026-09-10 17:40 and contains request-boundary / Claude reader strings. Relaunch Electron after killing any leftover harness-evidence-* processes so launchd does not keep the old driver.