Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/dinhanhthi/coding-friendnpx agentmods add skills/dinhanhthi/coding-friend/cf-checkpoint-fromWrote 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/dinhanhthi/coding-friend/cf-checkpoint-from)<a href="https://agentmods.dev/skills/dinhanhthi/coding-friend/cf-checkpoint-from"><img src="https://agentmods.dev/badge/skills/dinhanhthi/coding-friend/cf-checkpoint-from.svg" alt="Measured on agentmods" 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 | $0.00073 | $0.01452 |
| Opus 5 | $0.00036 | $0.00726 |
| Sonnet 5 | $0.00015 | $0.00290 |
| Haiku 4.5 | $0.00007 | $0.00145 |
Grade A, and why
cf-checkpoint-from 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 7d 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 — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/cf-checkpoint-from
CLI Requirement: NONE — Works without
coding-friend-cli. Reads the checkpoint file directly from disk; no CLI features are required. See CLI requirements for the full matrix.
Argument: $ARGUMENTS
Purpose
Load a saved checkpoint into the current (fresh) conversation as working context — goal, state, decisions, next steps — then continue the task. This is the counterpart to /cf-checkpoint, which captures that context; this skill only reads and restores it, it never creates or edits a checkpoint file.
IMPORTANT — path resolution:
- Use
MAIN_REPO_ROOTfrom the SessionStart bootstrap context (injected via session-init.sh). If absent, fall back to runningpwdfor$CWDand use$CWDasMAIN_REPO_ROOT. - Read config from
CF_CONFIG_FILE(=$MAIN_REPO_ROOT/.coding-friend/config.json) — do NOT search sub-folders. - Use
CF_DOCS_ROOTas the docs base dir (=$MAIN_REPO_ROOT/{docsDir}wheredocsDircomes from config, defaultdocs). - Checkpoints live under
{CF_DOCS_ROOT}/context/checkpoints/. - Always resolve paths as absolute paths — never relative, they may resolve incorrectly when the working directory contains nested git repos.
Workflow
Step 0: Custom Guide
Custom guide — auto-loaded below (if the raw command shows instead of its output, run it yourself):
bash "<plugin-root>/lib/load-custom-guide.sh" cf-checkpoint-from
If output is not empty, integrate returned sections: ## Before → before first step, ## Rules → apply throughout, ## After → after final step.
Step 1: Parse the argument
Split $ARGUMENTS into three parts:
--recapflag — remove it from anywhere in the argument first. Its presence sets recap ON (default OFF). It is not part of the slug or the message.- Checkpoint slug — the first remaining token (a bare
<slug>or a full file path). - User message — everything after that first token. This is the trusted instruction: what to do once context is loaded. May be empty.
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.
- 7d ago First seen · 93 lines · 73 tokens per session scan A d3a61696eaa1
cf-checkpoint-from is a skill published in the GitHub repository dinhanhthi/coding-friend (3 stars, last pushed yesterday), licensed MIT. It adds 73 tokens to every session and 1,452 once invoked, about $0.0004 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.
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