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.
npx skills add moonxorsun/focus-claude-code --skill checkpointgit clone --depth 1 https://github.com/moonxorsun/focus-claude-codeWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/moonxorsun/focus-claude-code/checkpoint)<a href="https://agentmods.dev/skills/moonxorsun/focus-claude-code/checkpoint"><img src="https://agentmods.dev/badge/skills/moonxorsun/focus-claude-code/checkpoint/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/moonxorsun/focus-claude-code/checkpoint"><img src="https://agentmods.dev/badge/skills/moonxorsun/focus-claude-code/checkpoint.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00015 | $0.01054 |
| Opus 5.5 | $0.00006 | $0.00422 |
| Sonnet 5.5 | $0.00003 | $0.00211 |
| Haiku 4.5 | $0.00002 | $0.00105 |
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 2mo 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.
How it starts
The opening of the file, as written. The whole thing — 149 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Environment
| Variable | Default |
|---|---|
CLAUDE_FOCUS_DIR |
.claude/tmp/focus |
Use $CLAUDE_FOCUS_DIR in paths. If unset, use the default .claude/tmp/focus.
Checkpoint Workflow
Execute this workflow when user invokes /focus:checkpoint.
Step 1: Choose Processing Mode
Ask user which mode to use:
| Mode | Description |
|---|---|
| Silent | Process all old sessions automatically |
| Interactive | Process only the oldest session, then pause |
| Oldest | Alias for Interactive |
Step 2: Run Checkpoint Script
python "{{FOCUS_PLUGIN_ROOT}}/scripts/checkpoint_session.py" --mode=<mode> [--dry-run]
Options:
--mode=silent- Process all old sessions--mode=interactive- Process only oldest session--mode=oldest- Same as interactive--dry-run- Show what would be done without modifying files
What the script does:
- Processes sessions from old to new (skips current session)
- Error detection → writes to
pending_issues.md - Omission detection → calls Haiku API to find unrecorded information
- Removes processed session records from operations.jsonl
Step 3: Handle Omission Detection Results
The script outputs omission detection results like:
### Session abc12345...
[Issue] Some bug that wasn't recorded
[Decision] A decision that was made but not documented
[Finding] An insight that was discovered
For each item:
- [Issue] → Add to the appropriate section in
focus_context.md - [Decision] → Add to the appropriate section in
focus_context.md - [Finding] → Add to the appropriate section in
focus_context.md - NONE or ERROR → No action needed
Step 4: Review Pending Issues
If pending_issues.md has items:
- Read
.claude/tmp/focus/pending_issues.md - For each issue, decide:
- Archive: If it reveals a pattern → use
/focus:donewhen session completes - Discard: If it's a user rejection or transient error
- Archive: If it reveals a pattern → use
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.
- 2mo ago First seen · 149 lines · 15 tokens per session scan A 9ed0a94d18fa
checkpoint is a skill published in the GitHub repository moonxorsun/focus-claude-code (5 stars, last pushed 8mo ago), licensed MIT. It adds 15 tokens to every session and 1,054 once invoked, about $0.0001 per session on Opus 5.5. 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.
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