Checkpoint Read

/checkpoint-read

Reads checkpoint commit history to recover project context when starting a new session. Queries Git history for checkpoint commits created by /checkpoint-commit, displays the most recent relevant checkpoint details, and summarizes what was implemented, what remains, and any decisions captured — enabling seamless session continuity.

Usage: /checkpoint-read

No arguments required. The command automatically reads the most recent checkpoint commits from local Git history.

Workflow

Follow these steps in order.

Step 1: List Recent Checkpoints

Query Git history for checkpoint commits:

git log --oneline --decorate --grep '^checkpoint.*:' -n 25

• If no results: Report "No checkpoint commits found in this repository." and STOP. Proceed with the session without checkpoint context.
• If results exist: Display the list of recent checkpoint commits to provide an overview of checkpoint history.

Step 2: Read Most Recent Checkpoint

Extract the SHA from the most recent (first) checkpoint in the list, then read its full details:

# Show commit stats (files changed)
git show --stat {SHA}

# Show full commit message and diff
git show {SHA}

Parse the commit message subject line and body for context recovery.

Step 3: Summarize Context

Analyze the checkpoint commit message and produce a structured summary with three sections:

1. What was implemented: Extract completed work from the commit body bullet points and diff content.
2. What remains: Identify pending items, TODOs, or incomplete work mentioned in the commit message.
3. Decisions captured: Note any architectural or design decisions recorded in the commit message.

Step 4: Report

Present the structured summary to the user, including:

• The checkpoint commit SHA and date for reference
• The CR identifier from the commit subject (e.g., CR-XXXX)
• The three-section context summary (implemented, remaining, decisions)

Safety Rules

• MUST NOT perform destructive Git operations: git reset, git rebase, git commit --amend, git push --force
• MUST NOT create commits, modify files, or alter Git state in any way
• MUST be entirely read-only — only Git query commands are permitted
• MUST rely only on local Git operations (no network calls)