Fix intermittent Codex and Claude activity detection

[kentwelcome]

Keep active Codex and Claude workers visible until structured lifecycle evidence says they stopped, eliminating intermittent false-idle task status.

What changed

• Retain privacy-safe typed lifecycle evidence across incremental session scans.
• Correlate modern Codex and Claude dispatch schemas with exact keys.
• Publish only coherent scan generations through the background worker.
• Add sanitized lifecycle, ordering, attribution, and rendering regressions.

Evidence

• Focused session activity: 16/16 passed.
• Full unit suites: 571/571 passed; integration, docs, formatting, and lint passed.

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075

[Copilot]

Pull request overview

This PR tightens local session-activity detection for Codex and Claude Code so workers remain visible until explicit structured stop evidence is observed, reducing intermittent “false idle” transitions. It does this by retaining privacy-safe typed evidence across incremental scans, adding stricter correlation rules, and only publishing coherent scan generations to the app.

Changes:

• Introduces SessionScanState and a typed evidence store to persist byte cursors + projected lifecycle facts across scans.
• Adds new projection/reduction pipeline (projection, codex, claude, reducer, state) with updated lifecycle correlation rules (cwd/parent/path) and retry-on-unstable-scan behavior.
• Expands and sanitizes fixtures + UI/core tests to cover lifecycle ordering, replay/reopen logic, and regression scenarios.

Reviewed changes

Copilot reviewed 43 out of 44 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
tests/fixtures/session-activity/codex-worker-unlinked/rollout.jsonl	Adds cwd to Codex session meta fixture.
tests/fixtures/session-activity/codex-worker-open/rollout.jsonl	Adds cwd to Codex session meta fixture.
tests/fixtures/session-activity/codex-worker-complete/rollout.jsonl	Adds cwd to Codex session meta fixture.
tests/fixtures/session-activity/codex-v2-wrong-path/parent.jsonl	New v2 negative fixture for mismatched agent path.
tests/fixtures/session-activity/codex-v2-wrong-path/child.jsonl	New v2 negative fixture child log.
tests/fixtures/session-activity/codex-v2-wrong-parent/parent.jsonl	New v2 negative fixture for mismatched parent thread id.
tests/fixtures/session-activity/codex-v2-wrong-parent/child.jsonl	New v2 negative fixture child log.
tests/fixtures/session-activity/codex-v2-wrong-cwd/parent.jsonl	New v2 negative fixture for mismatched cwd correlation.
tests/fixtures/session-activity/codex-v2-wrong-cwd/child.jsonl	New v2 negative fixture child log.
tests/fixtures/session-activity/codex-v2-worker-open/parent.jsonl	New v2 positive fixture parent start evidence.
tests/fixtures/session-activity/codex-v2-worker-open/child.jsonl	New v2 positive fixture child worker evidence.
tests/fixtures/session-activity/codex-fo-exec-command/rollout.jsonl	New fixture for direct structured exec_command evidence.
tests/fixtures/session-activity/claude-worker-open/parent.jsonl	Adds cwd to legacy Claude parent fixture.
tests/fixtures/session-activity/claude-worker-open/claude-fo-redacted/subagents/worker.jsonl	Adds cwd to legacy Claude sidechain worker fixture.
tests/fixtures/session-activity/claude-worker-idle/parent.jsonl	Adds cwd to legacy Claude idle envelope fixture.
tests/fixtures/session-activity/claude-worker-idle/claude-fo-redacted/subagents/worker.jsonl	Adds cwd to legacy Claude sidechain worker fixture.
tests/fixtures/session-activity/claude-modern-wrong-cwd/parent.jsonl	New modern Claude negative fixture for cwd mismatch.
tests/fixtures/session-activity/claude-modern-wrong-cwd/claude-parent/subagents/worker.meta.json	New modern Claude teammate metadata fixture.
tests/fixtures/session-activity/claude-modern-wrong-cwd/claude-parent/subagents/worker.jsonl	New modern Claude sidechain fixture.
tests/fixtures/session-activity/claude-modern-worker-open/parent.jsonl	New modern Claude parent dispatch fixture.
tests/fixtures/session-activity/claude-modern-worker-open/claude-parent/subagents/worker.meta.json	New modern Claude teammate metadata fixture.
tests/fixtures/session-activity/claude-modern-worker-open/claude-parent/subagents/worker.jsonl	New modern Claude sidechain fixture.
tests/fixtures/session-activity/claude-modern-duplicate-call/parent.jsonl	New modern Claude negative fixture for duplicate Agent calls.
tests/fixtures/session-activity/claude-modern-duplicate-call/claude-parent/subagents/worker.meta.json	New modern Claude teammate metadata fixture.
tests/fixtures/session-activity/claude-modern-duplicate-call/claude-parent/subagents/worker.jsonl	New modern Claude sidechain fixture.
tests/fixtures/session-activity/claude-modern-cross-parent/parent.jsonl	New modern Claude negative fixture for cross-parent correlation.
tests/fixtures/session-activity/claude-modern-cross-parent/different-parent/subagents/worker.meta.json	New modern Claude teammate metadata fixture.
tests/fixtures/session-activity/claude-modern-cross-parent/different-parent/subagents/worker.jsonl	New modern Claude sidechain fixture.
tests/fixtures/session-activity/claude-fo-gate/session.jsonl	Adds cwd to Claude FO gate fixture.
tests/fixtures/session-activity/claude-fo-complete/session.jsonl	Adds cwd to Claude FO completion fixture.
docs/superpowers/specs/2026-07-27-spacetop-entity-activity-design.md	Updates design spec to match new typed evidence + correlation rules.
crates/spacetop/src/ui/tests/task_list.rs	Adds UI regression test for scan replay and terminal clearing behavior.
crates/spacetop/src/ui/tests/preview.rs	Updates UI preview tests for the new previous_state/worker result shape.
crates/spacetop/src/ui/tests.rs	Updates UI test helpers for the new worker result shape.
crates/spacetop/src/lib.rs	Switches app worker wiring from session file snapshots to SessionScanState + immediate retry flag.
crates/spacetop/src/app/tests.rs	Updates app tests for the new worker result shape.
crates/spacetop/src/app/session_activity_worker.rs	Updates background worker to call scan_local_sessions_with_state and propagate retry + state.
crates/spacetop-core/src/session_activity/state.rs	New incremental scan state management: inventory, cursors, checkpointing, evidence retention.
crates/spacetop-core/src/session_activity/reducer.rs	New deterministic activity reducer with stable tie-breaking.
crates/spacetop-core/src/session_activity/projection.rs	New privacy-safe projection of session logs into typed facts + ordering metadata.
crates/spacetop-core/src/session_activity/codex.rs	New Codex-specific correlation + lifecycle event extraction.
crates/spacetop-core/src/session_activity/claude.rs	New Claude-specific correlation + lifecycle event extraction, including reopen logic.
crates/spacetop-core/src/session_activity.rs	Refactors session activity facade to use new state/projection/reducer pipeline.
AGENTS.md	Updates repo code map to reflect new session_activity/* module layout and responsibilities.