Checkpoint

Checkpoint Command

Native Subagent Protocol (Codex)

Codex supports native subagents. Delegate with spawn_agent, coordinate with send_input, collect via wait_agent, and clean up with close_agent.

Execution preference:

1. Use native subagents first for independent workstreams (parallel when possible).
2. Merge results in main thread and run final verification.
3. Fallback only when delegation is blocked: use the [ANALYST]/[ARCHITECT]/[EXECUTOR]/[REVIEWER] structure in a single response.

Minimal orchestration pattern:

spawn_agent -> send_input (optional) -> wait_agent -> close_agent

Create or verify a checkpoint in your workflow.

Usage

$checkpoint [create|verify|list] [name]

Create Checkpoint

When creating a checkpoint:

1. Run $verify (quick mode if supported) to ensure current state is clean
2. Create a git stash or commit with checkpoint name
3. Log checkpoint to .codex/checkpoints.log:

echo "$(date +%Y-%m-%d-%H:%M) | $CHECKPOINT_NAME | $(git rev-parse --short HEAD)" >> .codex/checkpoints.log

4. Report checkpoint created

Verify Checkpoint

When verifying against a checkpoint:

1. Read checkpoint from log

2. Compare current state to checkpoint:

   • Files added since checkpoint
   • Files modified since checkpoint
   • Test pass rate now vs then
   • Coverage now vs then

3. Report:

CHECKPOINT COMPARISON: $NAME
============================
Files changed: X
Tests: +Y passed / -Z failed
Coverage: +X% / -Y%
Build: [PASS/FAIL]

List Checkpoints

Show all checkpoints with:

• Name
• Timestamp
• Git SHA
• Status (current, behind, ahead)

Workflow

Typical checkpoint flow:

[Start] --> $checkpoint create "feature-start"
   |
[Implement] --> $checkpoint create "core-done"
   |
[Test] --> $checkpoint verify "core-done"
   |
[Refactor] --> $checkpoint create "refactor-done"
   |
[PR] --> $checkpoint verify "feature-start"

Arguments

$ARGUMENTS:

• create <name> - Create named checkpoint
• verify <name> - Verify against named checkpoint
• list - Show all checkpoints
• clear - Remove old checkpoints (keeps last 5)