Code Review: CLI Process-Liveness Detection Plan · Entire

Implementation Plan Review

You are reviewing an IMPLEMENTATION PLAN (not code yet) for the Entire CLI repo (Go, cwd is the repo root). Be a skeptical senior reviewer. Read the actual source files the plan names and verify the plan is correct, feasible, and idiomatic for THIS codebase.

Areas of Focus

Correctness of the technical approach: PID + start-time process-liveness detection
Cross-platform pitfalls: Darwin sysctl kinfo_proc decoding and Linux /proc/<pid>/stat field parsing — note field 2 comm can contain spaces/parens
Import-cycle risk: Ensure it reuses existing helpers
Race/safety concerns: Mutating session state and any missing edge cases

Important Issues

Inspect relevant liveness/session-state code paths first
Check for the existence of a missing implementation plan
Assess the boundaries of the design to avoid cycles or racy read-modify-write behavior

Code Shape Insights

State saves are atomic renames but not compare-and-swap. Any plan that “load, mutate, save”s session JSON from concurrent hook processes needs a lock or a narrow write path.
Currently, normalized lifecycle events do not carry an agent process PID.

Commits Overview

cdb6da3proclive: Add process-liveness package
- Captures process's identity (PID + start-time)
- Reports on process liveness
- ResolveOwner walks up the process tree to identify the agent that spawned the hook
- Check returns Alive/Dead/Unknown states
2178181session: Record owning process and detect exited sessions
- State.Owner captures the proclive.Identity at the turn start
- OwnerLiveness/OwnerExited report on the session's agent process status
dee13d6proclive: Enhancements to process-liveness
- Improved failure state handling and platform adaptability
d09e269session: Additional recording of session state
- Tracks state of owning process more effectively
96c54bastrategy: Capture session owner at each turn start
- Ensures ownership is recorded accurately each time for reliability.