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/guess/claude_code/cli-syncnpx skills add guess/claude_code --skill cli-syncgit clone --depth 1 https://github.com/guess/claude_codeWhat 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 | $0.00100 | $0.01660 |
| Opus 5 | $0.00050 | $0.00830 |
| Sonnet 5 | $0.00020 | $0.00332 |
| Haiku 4.5 | $0.00010 | $0.00166 |
Grade A, and why
cli-sync scanned grade A 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 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -sL "https://code.claude.com/docs/en/changelog.md" > .claude/skills/cli-sync/captured/docs/changelog.md How it starts
The opening of the file, as written. The whole thing — 134 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLI Sync
Synchronize the ClaudeCode Elixir SDK with the Claude CLI to detect schema changes, new options, control protocol drift, and update the bundled version.
Overview
The Claude CLI evolves independently of this SDK. This skill dispatches five parallel agents to check alignment across all layers: versions, message types, content blocks, control protocol, and CLI options. Each agent has self-contained instructions in a references/check-*.md file.
Canonical sources: The TypeScript SDK (@anthropic-ai/claude-agent-sdk) provides the SDKMessage union (message types) and SDKControl* types (control protocol). The Anthropic API SDK (@anthropic-ai/sdk) provides BetaContentBlock types. The Python SDK (claude-agent-sdk-python) provides cross-reference for options, field names, control protocol handling, and message parsing. See references/upstream-sources.md for the complete file-level mapping.
Workflow
Step 1: Check the Changelog
Before doing anything else, fetch and review the CLI changelog to understand what has changed since the last sync:
# Fetch the changelog
curl -sL "https://code.claude.com/docs/en/changelog.md" > .claude/skills/cli-sync/captured/docs/changelog.md
Read the fetched changelog and identify:
- New CLI features, options, or flags added
- Message type or content block changes
- Control protocol changes
- Breaking changes or deprecations
- SDK-relevant behavioral changes
This gives you a high-level roadmap of what to look for in the detailed sync analysis that follows. Note the specific changes that are relevant to the SDK so you can prioritize them in the subsequent steps.
Step 2: Refresh Captured Data
Run the capture script via Bash to fetch the latest CLI version, help output, and SDK type definitions:
.claude/skills/cli-sync/scripts/capture-cli-data.sh
This fetches claude --version, claude --help, TypeScript/Python SDK types from npm/GitHub, Anthropic API types, and official documentation (CLI reference, hooks, plugins reference, TS SDK docs, Python SDK docs). Verify the script completes without errors before proceeding.
What ships with it
31 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- captured/anthropic-api-messages.d.ts 112 KB runs code
- captured/anthropic-sdk-version.txt 7 B
- captured/bundled-version.txt 23 B
- captured/cli-help.txt 7.6 KB
- captured/cli-version.txt 21 B
- captured/docs/cli-reference.md 28 KB
- captured/docs/hooks.md 103 KB
- captured/docs/plugins-reference.md 30 KB
- captured/docs/python.md 98 KB
- captured/docs/typescript.md 68 KB
- captured/py-sdk-version.txt 8 B
- captured/python-sdk-client.py 5.7 KB runs code
- captured/python-sdk-message-parser.py 9.9 KB runs code
- captured/python-sdk-public-client.py 20 KB runs code
- captured/python-sdk-query.py 26 KB runs code
- captured/python-sdk-session-mutations.py 10 KB runs code
- captured/python-sdk-sessions.py 30 KB runs code
- captured/python-sdk-subprocess-cli.py 25 KB runs code
- captured/python-sdk-types.py 34 KB runs code
- captured/ts-sdk-types.d.ts 122 KB runs code
- captured/ts-sdk-version.txt 7 B
- references/check-content-blocks.md 7.8 KB
- references/check-control-protocol.md 8.0 KB
- references/check-message-types.md 5.5 KB
- references/check-options.md 5.7 KB
- references/check-versions.md 2.3 KB
- references/cli-flags.md 3.9 KB
- references/type-mapping.md 15 KB
- references/upstream-sources.md 5.8 KB
- scripts/capture-cli-data.sh 11 KB runs code
- scripts/compare-versions.sh 1.1 KB runs code
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.
- yesterday First seen · 134 lines · 100 tokens per session scan A 4356da890001
cli-sync is a skill published in the GitHub repository guess/claude_code (96 stars, last pushed 2mo ago), licensed MIT. It adds 100 tokens to every session and 1,660 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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