webjs: Skill for Claude Code

.claude/skills/webjs-start-work/SKILL.md

webjs-start-work is a skill for Claude Code from webjsdev/webjs. It costs 36 tokens per session (13,657 once invoked), scanned A, original, MIT.

A workflow skill for beginning work on an existing tracked GitHub issue in the webjsdev/webjs project. GitHub issues are task records, and the project board tracks their progress.

In plain words
What is it for?
Use it when starting work on a webjs issue that already exists. If no issue exists, the documented workflow requires filing one first.
Why use it?
It ensures work is linked to a tracked issue before coding begins, so the change can be followed through the project's process.

Skill for Claude Code

Written for Claude Code: when-to-use in frontmatter. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions subagents.

This is webjsdev/webjs's own configuration. It tells Claude Code how to work on webjs 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 webjs configures →

Reuse

Borrowing it

Nothing to install: this file belongs to webjsdev/webjs. 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/webjsdev/webjs/main/.claude/skills/webjs-start-work/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/webjsdev/webjs

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.

agentmods badge for webjs-start-work

README.md
[![agentmods](https://agentmods.dev/badge/skills/webjsdev/webjs/webjs-start-work/github.svg)](https://agentmods.dev/skills/webjsdev/webjs/webjs-start-work)
Your own site
<a href="https://agentmods.dev/skills/webjsdev/webjs/webjs-start-work"><img src="https://agentmods.dev/badge/skills/webjsdev/webjs/webjs-start-work/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.

agentmods 80×15 button for webjs-start-work

Your own site · 80×15
<a href="https://agentmods.dev/skills/webjsdev/webjs/webjs-start-work"><img src="https://agentmods.dev/badge/skills/webjsdev/webjs/webjs-start-work.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 13,657 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 3 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium MCP Rug Pull · line 167
    npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.
    Fix: Pin the version: npx @scope/[email protected]
  • medium Excessive Agency · line 342
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
  • medium Excessive Agency · line 344
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
How audits are shown
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 $0.00036 $0.13657
Opus 5.5 $0.00014 $0.05463
Sonnet 5.5 $0.00007 $0.02731
Haiku 4.5 $0.00004 $0.01366

Measured 12d ago against content hash 28cab9a12c7a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

webjs-start-work 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 12d 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/webjs-start-work/SKILL.md · 361 lines

How it starts

The opening of the file, as written. The whole thing — 361 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Start work on a webjs GitHub issue

The webjsdev/webjs project tracks work on the GitHub Project board at https://github.com/orgs/webjsdev/projects/1. This skill runs the start-of-work lifecycle whenever the user wants to begin a tracked issue.

Precondition: the work MUST already have a tracked issue

This skill picks up from an EXISTING issue. Before running any step below, confirm the task has one. It often does NOT: a task that arrives from a conversation, a code-review finding, a dogfood observation, or your own idea has no issue yet, and THAT is the gap this guards.

If there is no tracked issue for this work, STOP. Do not create a branch, do not write code. First invoke webjs-file-issue to file it and capture the new number, THEN run this skill with that number. Starting code on untracked work is a process failure: the PR ships with no Closes #N, the work never appears on the board, and the card never moves to Done. This has happened (a whole feature was implemented and merged before any issue existed, then filed retroactively only after the user noticed).

If you are unsure whether an issue already exists, search before filing:

gh api "search/issues?q=repo:webjsdev/webjs+is:issue+<keywords>&per_page=20" \
  --jq '.items[] | "#\(.number) [\(.state)] \(.title)"'

Search the ISSUES over REST rather than dumping the board. It matches bodies as well as titles, so it is the better duplicate check, and it costs nothing from the GraphQL budget. See .claude/gh-budget.md.

When in doubt, file it. A duplicate is cheap to close; untracked work is the expensive failure. Only once an issue number exists do you continue to Inputs below.

Inputs

The user's request typically names an issue by number (e.g. #112) or by description (e.g. "the dist issue"). Resolve the number first:

  • If the user said #N explicitly, use N.
  • If they described the issue by topic, search the issues over REST and match against titles. If multiple match, ask the user to disambiguate.

Read the full file on GitHub · 361 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. 12d ago Changed 28cab9a12c7a
  2. 13d ago Changed 799314c70873
  3. 28d ago Changed 389edacce9ff
  4. 1mo ago Changed 64bac48654eb
  5. 1mo ago Changed 7193987eab9d
  6. 1mo ago First seen · 361 lines · 36 tokens per session scan A 3644c01633f4

Subscribe to this mod's changes

webjs-start-work is a skill published in the GitHub repository webjsdev/webjs (27 stars, last pushed 13d ago), licensed MIT. It adds 36 tokens to every session and 13,657 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.