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 agentmods add skills/vonargo/containuity/checkpointnpx skills add vonargo/containuity --skill checkpointgit clone --depth 1 https://github.com/vonargo/containuityWhat 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 | $0.00065 | $0.01969 |
| Opus 5 | $0.00032 | $0.00984 |
| Sonnet 5 | $0.00013 | $0.00394 |
| Haiku 4.5 | $0.00006 | $0.00197 |
Grade B, and why
checkpoint scanned grade B with 1 finding 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.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
!`cat .checkpoint.config 2>/dev/null || cat .claude/checkpoint.config 2>/dev/null || echo "NO_CONFIG"` How it starts
The opening of the file, as written. The whole thing — 112 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Checkpoint
Run this checklist at a clean breakpoint to hold continuity across sessions and compactions. Perform each step — do not just print the checklist. Create one todo per step (1–4) and work them in order.
Seat configuration (auto-loaded)
!`cat .checkpoint.config 2>/dev/null || cat .claude/checkpoint.config 2>/dev/null || echo "NO_CONFIG"`
Resolve these keys from the block above (fall back to the defaults, and tell the user which you used):
| Key | Default | Meaning |
|---|---|---|
LIVING_DOC |
docs/DESIGN.md |
The source-verified "how" doc you keep non-stale. |
MEMORY_DIR |
.claude/memory |
Where durable memories live (one fact per file + MEMORY.md index). |
COMMIT_MODE |
offer |
offer = propose the commit and wait for OK. auto = commit without asking. |
COMMIT_CONVENTION |
infer |
infer from git log, or a freeform note overriding it. |
If NO_CONFIG: use the defaults, name them to the user, and mention they can run the worked example in the plugin README to create .checkpoint.config once per seat.
Current state (auto-collected)
Outstanding work:
!`git status --short 2>/dev/null || echo "not a git repo"`
Recent commits — infer author, message style, and co-author policy from these (do not impose your own):
!`git log -8 --pretty='format:%an <%ae> | %s' 2>/dev/null || echo "no git history"`
The checklist
1. Commit outstanding work
- If there is nothing to commit, say so and skip.
- Match the repo's existing convention inferred from the log above: author, message style (imperative vs. scoped vs. conventional-commits), and co-author trailer policy. If the log shows no co-author trailers, do not add one; if it shows them, match the form.
COMMIT_MODE=offer(default): stage the relevant changes, show the exact message you propose, and wait for approval. Do not commit until the user authorizes commits for this repo (in this session or viaCOMMIT_MODE=auto).COMMIT_MODE=auto: commit directly using the inferred convention.- Never
git pushunless the user explicitly asks.
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.
- 2d ago First seen · 112 lines · 65 tokens per session scan B 496747049623
checkpoint is a skill published in the GitHub repository vonargo/containuity (1 stars, last pushed 2mo ago), licensed MIT. It adds 65 tokens to every session and 1,969 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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