checkpoint

A checkpoint command that reviews work at the level of a code change, module, or broader codebase history. It checks whether the work matches its purpose and fits with the surrounding system.

In plain words
What is it for?
It is for reviewing a diff or pull request, checking a newly built module, or auditing wider project decisions, configuration, and gaps.
Why use it?
It gathers review findings in one report and lets the user choose what to record, propose, or edit instead of applying fixes automatically.

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/ackeskin/contexture/checkpoint
Clone the repo
git clone --depth 1 https://github.com/AcKeskin/contexture
Per session 61 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 371 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 $0.00061 $0.00371
Opus 5 $0.00030 $0.00186
Sonnet 5 $0.00012 $0.00074
Haiku 4.5 $0.00006 $0.00037

Measured yesterday against content hash bd2a8484a2b7, 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 yesterday.

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.

commands/checkpoint.md · 19 lines

What it actually says

Run the checkpoint skill.

Forms:

  • /checkpoint — auto-detect the scope and audit at that zoom.
  • /checkpoint --scope diff — fit on a change: runs /code-review (correctness) and a fit-pass ("does this serve the intent and cohere with the whole"), in one report.
  • /checkpoint --scope module — the post-build checkpoint over the just-built module(s): drift-from-intent, integration-fit (do the pieces cohere), continue-or-kill, lessons.
  • /checkpoint --scope corpus — the history + organ-surface audit (decision integrity, intent-vs-shipped, uncaptured lessons, consolidation; organ overlap, dead config, pipeline gaps, vision drift) via retrospect-core.

Auto-detect: a diff/PR in play → diff; a just-built / named module → module; no target → corpus; ambiguous → asks once. The resolved scope is shown in the report header so you can correct it.

Findings render as one batch (the batched output contract); you pick which to apply in a single pass; each routes to /capture / /memory-audit / a proposals/ stub / a direct edit. Never fixes in place, never auto-fires.

See ~/.claude/skills/checkpoint/SKILL.md for the full procedure (scope resolution, the per-scope passes, the batch-then-apply flow).

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. yesterday First seen · 19 lines · 61 tokens per session scan A bd2a8484a2b7

Subscribe to this mod's changes

checkpoint is a command published in the GitHub repository AcKeskin/contexture (2 stars, last pushed 1mo ago), licensed MIT. It adds 61 tokens to every session and 371 once invoked, about $0.0003 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.