Vue Route Breadcrumbs

What it does

When your agent uses it

• Adding a route to the Vue router files and needing its breadcrumb trail
• Migrating a legacy PHP page to Vue with a matching breadcrumb
• Fixing a wrong or missing breadcrumb, or the console warning about a missing meta.breadcrumb

Example prompts

• “Add a breadcrumb to the new checklist route in the Vue router.”
• “The agenda page shows the raw route name in its breadcrumb; fix it from the router file.”
• “I migrated the gradebook page to Vue; wire up its breadcrumb parents.”

Requirements

• A Chamilo checkout with the Vue router files under assets/vue/router

Workflow steps

3 steps, taken from the step headings in SKILL.md.

1. 1Ask for a breadcrumb
2. 2Declare the label
3. 3Register every key

What it can do on your machine

Read from SKILL.md and the folder at commit c3b9c05. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • yarn
  • python3
  • npx
  • php

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md. Its commands use yarn and npx, which can reach the network depending on how they are called.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Vue Route Breadcrumbs loads about 2k tokens when it runs. Until then it costs about 211 tokens; SKILL.md has 813 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~211

When it runs · the whole SKILL.md, loaded when a task matches

~2k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from chamilo/chamilo-lms at commit c3b9c05, republished under its GPL-3.0 licence (© chamilo). 813 words, ~2,020 tokens.

name

vue-breadcrumb

description

Give a Vue SPA route its breadcrumb, entirely from the router file. The breadcrumb component reads four declarations in `meta` — `showBreadcrumb`, `breadcrumb`, `breadcrumbParents` and `breadcrumbResource` — and knows no page by name. Auto-invoke when: the user adds a route to any file in `assets/vue/router/`, creates a new Vue page or view that needs a URL, migrates a legacy PHP page to Vue, reports a wrong or missing breadcrumb, sees the console warning "[Breadcrumb] Route ... has no meta.breadcrumb", or mentions breadcrumb, crumb, trail, `meta.breadcrumb`, `breadcrumbParents` or `breadcrumbResource`. Do NOT invoke for: the legacy PHP breadcrumb (`window.breadcrumb`, injected by `public/main/`), for `/admin/settings/<namespace>` (its last crumb is read from the DOM), or for styling work on `Breadcrumb.vue` itself.

// The personal agenda hangs from no course, so it has nothing to show.
showBreadcrumb: (route) => Number(route.query?.cid || 0) > 0,

export default {
  path: "/resources/checklist/:node/",
  meta: {
    requiresAuth: true,
    showBreadcrumb: true,
    tool: "checklist",
    breadcrumb: "Checklists",
  },
  name: "checklist",
  component: () => import("../components/layout/SimpleRouterViewLayout.vue"),
  redirect: { name: "ChecklistList" },
  children: [
    { name: "ChecklistList", path: "", meta: { breadcrumb: "" }, component: ... },
    { name: "ChecklistCreate", path: "create", meta: { breadcrumb: "Create" }, component: ... },
    { name: "ChecklistUpdate", path: "edit/:id", meta: { breadcrumb: "Edit" }, component: ... },
  ],
}

breadcrumb: (route) => {
  const gid = Number(route.query?.gid || 0)
  const cid = Number(route.query?.cid || 0)

  return gid > 0 ? "Group agenda" : cid > 0 ? "Agenda" : "Personal agenda"
},

python3 -c "import json; d=json.load(open('assets/locales/en_US.json')); print('Checklists' in d)"

meta: {
  breadcrumb: "Import checklists",
  breadcrumbParents: [
    { label: "Administration", route: { name: "AdminIndex" } },
    { label: "Checklists", route: { name: "ChecklistAdminList" } },
  ],
}

// One resource at a time: list -> resource -> sub-page.
breadcrumbResource: {
  trail: "self",
  listRoute: "AssignmentsList",
  detailRoute: "AssignmentDetail",
  detailParam: "id",
}

// A chain of folders, walked up the resource-node parents.
breadcrumbResource: {
  trail: "ancestors",
  listRoute: "DocumentsList",
  detailRoute: "DocumentsList",
}

# Fails when a route renders a breadcrumb without declaring its label.
yarn check:breadcrumb-routes

npx eslint assets/vue/router/
yarn dev

Then I should see the ".app-breadcrumb a[href='/admin/urls']" element

© chamilo, GPL-3.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .claude/skills/vue-breadcrumb of chamilo/chamilo-lms.

Open the folder on GitHubat commit c3b9c05