Borrowing it
Nothing to install: this file belongs to rajbos/ai-engineering-fluency. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/rajbos/ai-engineering-fluency/main/.claude/skills/whats-new-catalog/SKILL.mdgit clone --depth 1 https://github.com/rajbos/ai-engineering-fluencyWrote 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/rajbos/ai-engineering-fluency/whats-new-catalog)<a href="https://agentmods.dev/skills/rajbos/ai-engineering-fluency/whats-new-catalog"><img src="https://agentmods.dev/badge/skills/rajbos/ai-engineering-fluency/whats-new-catalog/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.
<a href="https://agentmods.dev/skills/rajbos/ai-engineering-fluency/whats-new-catalog"><img src="https://agentmods.dev/badge/skills/rajbos/ai-engineering-fluency/whats-new-catalog.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00167 | $0.01980 |
| Opus 5.5 | $0.00067 | $0.00792 |
| Sonnet 5.5 | $0.00033 | $0.00396 |
| Haiku 4.5 | $0.00017 | $0.00198 |
Grade B, and why
whats-new-catalog scanned grade B 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.
Subtle steeringmediumPrompt injection
Instructions that bias recommendations or shape behaviour without the user noticing.
| **Tab-tracking gaps** — a catalogued `tab` on a view that never posts `viewTabOpened` | The announcer can never tell the user opened it, so it keeps offering something they already found. Invisible in review; the main How it starts
The opening of the file, as written. The whole thing — 149 lines — stays where its author put it; the contents beside it link to each section on GitHub.
What's New Catalog Skill
vscode-extension/src/whatsNew/catalog.ts is hand-written prose that drives two
user-facing things:
- the What's New view (the last 5 releases, in plain English), and
- the one-a-day new-feature notifications — which surface gets pointed out, and where its "Take me there" button goes.
Because it is prose, nothing about it compiles-or-breaks. A release can ship with no entry, an entry can point at a tab that was renamed, and everything still builds and every test still passes. The view just quietly starts lying.
This skill covers the mechanical half. The editorial half — what to say — is yours, and the guidance for it is below.
Full feature documentation: docs/features/WHATS-NEW.md
The detector
node .github/skills/whats-new-catalog/whats-new-catalog.js # human-readable
node .github/skills/whats-new-catalog/whats-new-catalog.js --json # machine-readable
Dependency-free apart from the repo's own TypeScript — it transpiles and
evaluates catalog.ts rather than pattern-matching its prose, so multi-line
descriptions containing braces and quotes can never confuse it. Run pnpm install in
vscode-extension/ first if it complains.
What it checks
| Check | Why it matters |
|---|---|
Version coverage — package.json's version has a catalog entry |
Without one, everything in that release is invisible in the view and can never be announced |
Date hygiene — only the newest entry may be date: null |
An older undated entry makes the view say "Unreleased" about something users have run for months |
Orphan surfaces — every surface resolves to a real view, and a real tab on it |
An orphan is a "Take me there" button that silently does nothing |
Tab-tracking gaps — a catalogued tab on a view that never posts viewTabOpened |
The announcer can never tell the user opened it, so it keeps offering something they already found. Invisible in review; the main reason this script exists |
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 · 149 lines · 167 tokens per session scan B aeeac6e34711
whats-new-catalog is a skill published in the GitHub repository rajbos/ai-engineering-fluency (119 stars, last pushed yesterday), licensed MIT. It adds 167 tokens to every session and 1,980 once invoked, about $0.0007 per session on Opus 5.5. A static security scan graded it B with 1 finding (subtle steering). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-26.
Other skills, from other repositories
release-announcement
Write a release announcement — changelog, blog post, in-app note, or social post — that leads with user impact, names the audience, and includes upgrade/migration steps without filler.
release
Fully automate a release with version-bump and childhood.
release-notes
Generate user-facing release notes from tickets, PRDs, or changelogs. Creates clear, engaging summaries organized by category (new features, improvements, fixes). Use when writing release notes, creating changelogs, announcing product updates, or summarizing what shipped.
multi-agent-release-manager
Cleans up the workspace, formats code, runs presubmit checks, and uploads CLs to Gerrit.
pack-submit
Package one of this agent's own skills as a standalone community pack and submit it to the aeon registry as a PR.
release-helper
Ensures configuration and code changes are released correctly. Use PROACTIVELY whenever you edit config.json, change any setting, or fix a configuration bug in this project, so the change reaches production.