checkpoint

A command for saving progress during an active focus session without ending it.

In plain words
What is it for?
Use it mid-task to archive notes, shorten stored logs, update the active planning file, and optionally commit the checkpoint.
Why use it?
It preserves useful findings and reduces session clutter while allowing work to continue.

Command

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/moonxorsun/focus-claude-code/checkpoint
Clone the repo
git clone --depth 1 https://github.com/moonxorsun/focus-claude-code
Per session 24 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 129 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00024 $0.00129
Opus 5 $0.00012 $0.00064
Sonnet 5 $0.00005 $0.00026
Haiku 4.5 $0.00002 $0.00013

Measured 2d ago against content hash c5e92d39d9e3, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

checkpoint scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/focus/commands/checkpoint.md · 17 lines

What it actually says

IMPORTANT: Execute the command below EXACTLY as written. Do NOT modify the path or use alternative commands.

Run the checkpoint script to save progress:

python "{{FOCUS_PLUGIN_ROOT}}/scripts/checkpoint_session.py"

After the script runs, follow the SKILL.md instructions at skills/checkpoint/SKILL.md to:

  1. Archive valuable findings/issues to documentation
  2. Update focus_context.md (remove archived items)
  3. Optionally commit the checkpoint
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 17 lines · 24 tokens per session scan A c5e92d39d9e3

Subscribe to this mod's changes

checkpoint is a command published in the GitHub repository moonxorsun/focus-claude-code (5 stars, last pushed 6mo ago), licensed MIT. It adds 24 tokens to every session and 129 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.