A command that checks whether the installed coding-agent kit has a newer published version and updates it when appropriate. It reports the current and latest versions before changing kit-owned files.

Use it to check for releases, update a full local installation, or learn the command needed to update a plugin installation.

It avoids guessing about updates and explains when network access, plugin updating, or an explicit update is required.

update-csk — Command for Claude Code by byerlikaya/claude-starter-kit

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.

Clone the repo

git clone --depth 1 https://github.com/byerlikaya/claude-starter-kit

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/commands/byerlikaya/claude-starter-kit/update-csk/github.svg)](https://agentmods.dev/commands/byerlikaya/claude-starter-kit/update-csk)

Your own site

<a href="https://agentmods.dev/commands/byerlikaya/claude-starter-kit/update-csk"><img src="https://agentmods.dev/badge/commands/byerlikaya/claude-starter-kit/update-csk/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.

Your own site · 80×15

<a href="https://agentmods.dev/commands/byerlikaya/claude-starter-kit/update-csk"><img src="https://agentmods.dev/badge/commands/byerlikaya/claude-starter-kit/update-csk.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

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 594 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00024	$0.00594
Opus 5.5	$0.00010	$0.00238
Sonnet 5.5	$0.00005	$0.00119
Haiku 4.5	$0.00002	$0.00059

Measured 1mo ago against content hash fb3fead5d904, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

update-csk 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 1mo 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.

claude-starter/commands/update-csk.md · 28 lines

What it actually says

/update-csk

Bring the installed kit up to the latest published version:

Detect install type. If .claude/VERSION exists → a full install (steps below). If the kit runs as a plugin (no .claude/VERSION), it updates through the plugin system — tell the user to run claude plugin update claude-starter-kit and stop here.
Current version: read .claude/VERSION.
Latest version: npm view @byerlikaya/claude-starter-kit version (needs network). If it can't be reached, say so and stop — don't guess.
Compare. Already on the latest → report "up to date (vX)" and stop. Otherwise show old → new.
Update — this rewrites the kit-owned files under .claude/ (your ./CLAUDE.md and project skills are preserved). Show this plan first, then run: npx --yes @byerlikaya/claude-starter-kit@latest update --here --yes. Two DIFFERENT --yes flags, both required for a non-interactive run: the one before the package name is npx's own — it auto-confirms npx's Ok to proceed? install prompt, which reads the real TTY and IGNORES piped input, so without it the command hangs before the kit even starts. The --here --yes after the package go to the updater (--here = apply on the current branch, --yes = accept the smart defaults). Together they let it run to completion instead of blocking on a prompt your shell can't answer. If you'd rather review each handover decision yourself, tell the user to run npx @byerlikaya/claude-starter-kit@latest update (no flags) in their own terminal, where both the npx and the interactive prompts work.
Verify: run /doctor-csk (or bash .claude/eval/doctor.sh) so a bad/partial update surfaces immediately.
Report old → new + the headline changes (from the release notes / CHANGELOG).
Reload (manual — a command can't do it itself): the discipline in the running session is still the OLD one. Tell the user to run /compact (or /clear) so the updated .claude/DISCIPLINE.md is re-read in the same session — no restart needed.

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.

1mo ago First seen · 28 lines · 24 tokens per session scan A fb3fead5d904

Subscribe to this mod's changes

update-csk is a command published in the GitHub repository byerlikaya/claude-starter-kit (24 stars, last pushed 29d ago), licensed MIT. It adds 24 tokens to every session and 594 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 2026-08-30.

agent-skills agents ai-agents anthropic automation boilerplate

update-csk

Getting it into your agent

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Nothing flagged

What it actually says

/update-csk

What this file has done since we first saw it

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