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ably-cli: Skill for Claude Code

.claude/skills/ably-codebase-review/SKILL.md

ably-codebase-review is a skill for Claude Code from ably/ably-cli. It costs 101 tokens per session (4,925 once invoked), scanned A, original, Apache-2.0.

A review procedure for checking the entire Ably command-line codebase against the project’s command-creation conventions.

In plain words
What is it for?
Use it to audit command implementations, verify compliance, trace inherited methods and callers, and find issues in error handling, JSON output, formatting, and logging.
Why use it?
It finds places where existing commands differ from the expected patterns, using code structure analysis when text searches are not enough.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: reads .claude/ paths; mentions Claude Code.

This is ably/ably-cli's own configuration. It tells Claude Code how to work on ably-cli itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything ably-cli configures →

not rated 5repo 2d ago A scan 101 tokens original Apache-2.0
View source ↗ ably/ably-cli cli-web-cli.vercel.app
Reuse

Borrowing it

Nothing to install: this file belongs to ably/ably-cli. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/ably/ably-cli/main/.claude/skills/ably-codebase-review/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/ably/ably-cli

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.

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README.md
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Your own site
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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.

agentmods 80×15 button for ably-codebase-review

Your own site · 80×15
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Per session 101 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,925 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00101 $0.04925
Opus 5.5 $0.00040 $0.01970
Sonnet 5.5 $0.00020 $0.00985
Haiku 4.5 $0.00010 $0.00492

Measured 2mo ago against content hash d7b8bdc5d89b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ably-codebase-review 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 2mo 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/skills/ably-codebase-review/SKILL.md · 262 lines

How it starts

The opening of the file, as written. The whole thing — 262 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Ably Codebase Review

This skill reviews the entire Ably CLI codebase against the conventions defined in the ably-new-command skill. It uses a combination of LSP for structural analysis (type hierarchies, call chains, symbol definitions) and grep/read for text-pattern checks, choosing the right tool for each check.

Tool selection guide

Use LSP when you need type-system awareness:

  • goToDefinition — resolve what base class a command actually extends (not just the import text)
  • findReferences — trace all callers of fail(), logJsonResult, logJsonEvent through inheritance
  • hover — reveal resolved types, inherited members, full type hierarchy
  • documentSymbol — list all methods/properties in a class structurally

Use grep/read when a text match is sufficient:

  • this.error() calls in command files
  • Component string casing in this.fail() and logCliEvent() calls
  • new Error(...) wrapping in this.fail() calls (unnecessary — accepts strings)
  • shouldOutputJson guards around this.log()
  • formatSuccess() calls ending with .
  • formatProgress() calls with manual ...
  • chalk.cyan() where formatResource() should be used
  • Quoted resource names instead of formatResource(name)
  • --json / --pretty-json in static examples arrays
  • Flag spreads like ...productApiFlags, ...durationFlag, ...clientIdFlag
  • waitUntilInterruptedOrTimeout usage
  • Missing test files (glob for them)
  • --duration flag in subscribe test files
  • Mock helper imports (getMockAblyRealtime, getMockAblyRest, getMockConfigManager)

Step 0: Verify LSP prerequisites

Before doing any analysis, check that the LSP tooling is available:

  1. Check for the LSP tool — verify the LSP tool is available in your tool list. If it is not, tell the user:

    The LSP plugin is not installed. Install it by running:

    claude plugin add anthropic/claude-code-lsp

    Then restart Claude Code and re-run this skill. Stop here — do not proceed without the LSP tool.

Read the full file on GitHub · 262 lines

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. 2mo ago First seen · 262 lines · 101 tokens per session scan A d7b8bdc5d89b

Subscribe to this mod's changes

ably-codebase-review is a skill published in the GitHub repository ably/ably-cli (5 stars, last pushed 2d ago), licensed Apache-2.0. It adds 101 tokens to every session and 4,925 once invoked, about $0.0004 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 2026-08-31.

Code review
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