Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add fusengine/agents/plugin install fuse-changelogWrote 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/fusengine/agents/changelog-scan)<a href="https://agentmods.dev/skills/fusengine/agents/changelog-scan"><img src="https://agentmods.dev/badge/skills/fusengine/agents/changelog-scan/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/fusengine/agents/changelog-scan"><img src="https://agentmods.dev/badge/skills/fusengine/agents/changelog-scan.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 | $0.00024 | $0.00605 |
| Opus 5.5 | $0.00010 | $0.00242 |
| Sonnet 5.5 | $0.00005 | $0.00121 |
| Haiku 4.5 | $0.00002 | $0.00060 |
Grade A, and why
changelog-scan 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.
How it starts
The opening of the file, as written. The whole thing — 54 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Changelog Scan Skill
Overview
Fetches and analyzes the official Claude Code changelog to detect new versions and changes.
Data Sources
| Source | URL | Method |
|---|---|---|
| Changelog | code.claude.com/docs/en/changelog.md | WebFetch |
| Docs Index | code.claude.com/docs/llms.txt | WebFetch |
| Hooks Ref | code.claude.com/docs/en/hooks.md | WebFetch |
| Plugins Ref | code.claude.com/docs/en/plugins-reference.md | WebFetch |
| CLI Ref | code.claude.com/docs/en/cli-reference.md | WebFetch |
Workflow
- Fetch changelog via the harness CLI (ported from the old
fetch-changeloginto@fusengine/harness):bun ${CLAUDE_PLUGIN_ROOT}/../node_modules/@fusengine/harness/dist/cli/bin.mjs changelogIt fetchescode.claude.com/docs/en/changelog.md, parses versions (current MDX<Update label="X.Y.Z">format + legacy## vX.Y.Zfallback), writes state to~/.claude/logs/00-changelog/<date>-state.json, and prints JSON{latest, new_since_last_check, recent_versions}. WebFetch on the same URL is the manual fallback. - Parse version numbers and release dates
- Extract changes per version (features, fixes, breaking)
- Compare with last known version from state file
- Generate report using templates/changelog-report.md
Version Detection
Parse patterns from changelog:
## vX.Y.Zor## X.Y.Z- Version headers### Breaking Changes- Breaking section### New Features- Features section### Bug Fixes- Fixes section
What ships with it
2 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.
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 · 54 lines · 24 tokens per session scan A 2c00e4ebc589
changelog-scan is a skill published in the GitHub repository fusengine/agents (33 stars, last pushed 9d ago), licensed MIT. It adds 24 tokens to every session and 605 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 2026-09-03.
Other skills, from other repositories
radin-record
Log bugs, follow-ups, ideas or feedback raised this session as backlog entries that outlive the conversation. Use for /radin-record or any ask to save something for later, even a vague one ("add the findings"): scan the whole session.
radin-stats
Show the stats/gain output of every companion tool that ships one, side by side.
designing-interfaces
Creates a design system for software with a UI. Use when a project has a user interface and architecture is confirmed — whether creating from scratch or extracting patterns from existing code.
orchestrating-software-dev
Runs software development projects from idea to completion. Use when starting a software project, adding a feature, fixing a bug, or resuming an in-progress build.
managing-product
Extracts product requirements and produces a PRD. Use when a user wants to build software and needs to define what to build before architecture or implementation, when scoping an MVP, or when translating a vague idea into a buildable specification.
enriching-roadmap
Enriches implementation roadmap chunks with acceptance criteria, pattern references, and contextual notes. Use after decomposing-work has produced the structural roadmap and before planning-software creates the orchestration plan. Does not modify chunk structure or dependencies.