}

  }

  /* A grid child will not shrink below its content unless told to, and a long

     unbroken commit message inside the tree is exactly that content. */

  .repo-view__main,

  .repo-view__rail {

    min-width: 0;

  }

  /* ── Repository page ────────────────────────────────────────────────────── */

  .repo-page {

    display: flex;

    flex-direction: column;

    gap: 16px;

  }

  .repo-page__identity {

    display: flex;

    flex-wrap: wrap;

    align-items: center;

    gap: 12px;

  }

  /* The trail is the page title here, so it is set at title size rather than

     at the small size a trail carries when it sits above one. */

  .repo-page__trail .breadcrumb__link,

  .repo-page__trail .breadcrumb__current,

  .repo-page__trail .breadcrumb__separator {

    font-size: 1.25rem;

  }

  .repo-page__trail .breadcrumb__current {

    color: var(--text-primary);

    font-weight: 600;

  }

  /* ── Section bar ────────────────────────────────────────────────────────── */

  /* Links that change the URL, so the selected one is marked by aria-current

     and the underline follows that attribute rather than a second class. */

  .repo-tabs {

    display: flex;

    gap: 4px;

    overflow-x: auto;

    border-block-end: 1px solid var(--line);

  }

  .repo-tabs__tab {

    display: inline-flex;

    align-items: center;

    gap: 8px;

    padding: 8px 12px;

    border-block-end: 2px solid transparent;

    color: var(--text-muted);

    font-size: 0.875rem;

    text-decoration: none;

    white-space: nowrap;

    transition:

      color var(--motion-fast) var(--ease),

      border-color var(--motion-fast) var(--ease);

  }

  .repo-tabs__tab .icon {

    width: 16px;

    height: 16px;

    flex: none;

    color: var(--icon-tertiary);

    font-size: 16px;

  }

  @media (hover: hover) {

    .repo-tabs__tab:hover {

      border-color: var(--line-strong);

      color: var(--text-primary);

    }

  }

  .repo-tabs__tab[aria-current="page"] {

    border-color: var(--accent-bright);

    color: var(--text-primary);

    font-weight: 600;

  }

  .repo-tabs__tab[aria-current="page"] .icon {

    color: var(--icon-primary);

  }

  .repo-tabs__count {

    border-radius: 999px;

    background: var(--wash-selected);

    padding: 1px 7px;

    color: var(--text-muted);

    font-size: 0.75rem;

    font-variant-numeric: tabular-nums;

    font-weight: 500;

  }

  /* ── File table ─────────────────────────────────────────────────────────── */

  .file-table {

    font-size: 0.8125rem;

  }

  /* How many commits are behind the one named to its left. It belongs at the

     far edge because it is the only thing in this row that is not about that

     single commit. */

  .file-table__commits {

    display: inline-flex;

    align-items: center;

    gap: 6px;

    margin-inline-start: auto;

    color: var(--text-muted);

  }

  .file-table__commits .icon {

    width: 16px;

    height: 16px;

    flex: none;

    color: var(--icon-tertiary);

    font-size: 16px;

  }

  .file-table__commits strong {

    color: var(--text-primary);

    font-variant-numeric: tabular-nums;

  }

  .file-table__list {

    width: 100%;

    border-collapse: collapse;

    }

  }

  /* The one column that gives up its width. `width: 100%` claims the slack a

     table would otherwise hand to the name, and `max-width: 0` lets the cell

     shrink back under it so a long subject truncates instead of widening the

     table past its container. */

  .file-row__message {

    width: 100%;

    max-width: 0;

    overflow: hidden;

    color: var(--text-muted);

    font-size: 0.8125rem;

    text-overflow: ellipsis;

    white-space: nowrap;

  }

  .file-row__size {

    width: 1%;

    color: var(--text-dim);

    white-space: nowrap;

  }

  .file-row__age {

    width: 1%;

    color: var(--text-dim);

    font-size: 0.75rem;

    text-align: end;

    white-space: nowrap;

  }

  .file-table__empty {

    padding: 16px 12px;

    color: var(--text-dim);

    font-size: 16px;

  }

  .repo-about__languages h3 {

  .repo-about__languages h3,

  .repo-about__contributors h3 {

    padding-block-end: 8px;

    color: var(--text-primary);

    font-size: 0.875rem;

    font-weight: 600;

  }

  .repo-about__count {

    color: var(--text-dim);

    font-variant-numeric: tabular-nums;

    font-weight: 400;

  }

  /* A wrapped cluster rather than a column: the group reads as one fact about

     the repository, not as a list to be gone through name by name. Each face

     still carries its own accessible name. */

  .contributor-cluster {

    display: flex;

    flex-wrap: wrap;

    align-items: center;

    gap: 4px;

    margin: 0;

    padding: 0;

    list-style: none;

  }

  .contributor-cluster > li {

    display: inline-flex;

  }

  .contributor-cluster__count {

    color: var(--text-muted);

    font-size: 0.75rem;

    font-variant-numeric: tabular-nums;

  }

  /* A hairline in the page's own fill, so adjacent faces of similar tone still

     read as separate people. */

  .contributor-cluster .avatar {

    border: 1px solid var(--ink-void);

  }

  /* Wide enough to type a path into and no wider: the ref bar is a row of small

     controls, and a search field that fills it reads as the subject of the bar

     rather than one control in it. */

  .file-table__search {

    width: 100%;

    max-width: 220px;

  }

  /* One bar rather than a stack: the proportions are the point, and they only

     read as proportions when the segments share a length. */

  .language-bar {

          source: "OpenAgentsWeb.UI.repo_about/1",

          summary: "The rail beside a repository: description, licence, languages."

        },

        %{

          slug: "openagents-repo-tabs",

          title: "Repo tabs",

          icon: "category",

          source: "OpenAgentsWeb.UI.repo_tabs/1",

          summary: "A repository's sections as links, the current one marked by aria-current."

        },

        %{

          slug: "openagents-repo-view",

          title: "Repository view",

          icon: "folders",

          source: "OpenAgentsWeb.UI.repo_view/1",

          summary: "The whole repository home: identity, sections, tree, and rail in one frame."

        },

        %{

          slug: "openagents-status-indicator",

          title: "Status indicator",

    """

  end

  @doc """

  The section bar under a repository's name: Code, Issues, Pull requests, and

  whatever else that repository publishes.

  Page navigation rather than a tab widget. Every entry changes the URL, so the

  selected one carries `aria-current="page"` and none of them carries a tab

  role -- a tab role promises panels that swap in place, and a reader who takes

  that promise and reaches for the arrow keys gets nothing.

  A count lives in its own element rather than inside the label, so "Issues"

  stays findable by that word alone and the number can be toned down, or

  dropped at a narrow width, without rewriting the string.

  """

  attr :label, :string, default: "Repository sections"

  attr :class, :any, default: nil

  attr :rest, :global

  slot :tab, required: true do

    attr :icon, :string

    attr :count, :integer

    attr :current, :boolean

    attr :navigate, :string

    attr :patch, :string

    attr :href, :string

  end

  def repo_tabs(assigns) do

    ~H"""

    <nav class={["repo-tabs", @class]} aria-label={@label} {@rest}>

      <.link

        :for={tab <- @tab}

        navigate={tab[:navigate]}

        patch={tab[:patch]}

        href={tab[:href]}

        aria-current={tab[:current] && "page"}

        class="repo-tabs__tab"

      >

        <.icon :if={tab[:icon]} name={tab.icon} />

        <span class="repo-tabs__label">{render_slot(tab)}</span>

        <span :if={tab[:count]} class="repo-tabs__count">{tab.count}</span>

      </.link>

    </nav>

    """

  end

  @doc """

  A repository's file table: the ref bar, the latest commit, and the entries.

  looks like a row is the reason GitHub's own version of this reads oddly on

  first sight.

  Per-row commit messages are deliberately absent. GitHub fills them by

  walking history once per path, which is one process per file; when we have

  that cheaply the slot is `meta` and it costs no markup change.

  Per-row commit messages are optional, because GitHub fills them by walking

  history once per path, which is one process per file. An entry that carries

  `message` and `updated` gets them; when no entry does, those two columns are

  not rendered at all rather than emitted empty, so the cheap tree keeps the

  markup it already had.

  """

  attr :owner, :string, required: true

  attr :repo, :string, required: true

  attr :ref, :string, required: true

  attr :path, :string, default: ""

  attr :entries, :list, required: true, doc: "`[%{name, kind, size}]` from `Browse.tree/3`"

  attr :entries, :list,

    required: true,

    doc:

      "`[%{name, kind, size}]` from `Browse.tree/3`, each optionally carrying " <>

        "`message` and `updated` from that path's last commit"

  attr :branches, :integer, default: nil

  attr :tags, :integer, default: nil

  attr :commits, :integer, default: nil, doc: "commits on this ref, shown beside the latest one"

  attr :class, :any, default: nil

  slot :commit, doc: "the latest commit, shown above the table"

  slot :actions, doc: "controls at the trailing edge of the ref bar"

  def file_table(assigns) do

    assigns =

      assign(assigns, :history?, Enum.any?(assigns.entries, &(&1[:message] || &1[:updated])))

    ~H"""

    <div class={["file-table", @class]}>

      <div class="file-table__bar">

        <span :if={@actions != []} class="file-table__actions">{render_slot(@actions)}</span>

      </div>

      <div :if={@commit != []} class="file-table__commit">{render_slot(@commit)}</div>

      <div :if={@commit != [] or @commits} class="file-table__commit">

        {render_slot(@commit)}

        <span :if={@commits} class="file-table__commits">

          <.icon name="history" />

          <strong>{@commits}</strong> {plural(@commits, "Commit", "Commits")}

        </span>

      </div>

      <table class="file-table__list">

        <caption class="visually-hidden">

                {entry.name}

              </.link>

            </td>

            <td :if={@history?} class="file-row__message" title={entry[:message]}>

              {entry[:message]}

            </td>

            <td class="file-row__size">{size_label(entry)}</td>

            <td :if={@history?} class="file-row__age">{entry[:updated]}</td>

          </tr>

        </tbody>

      </table>

  """

  attr :description, :string, default: nil

  attr :license, :string, default: nil

  attr :contributors, :integer,

    default: nil,

    doc: "the total, when more people committed than there are faces to show"

  attr :class, :any, default: nil

  slot :link, doc: "one related destination" do

    attr :icon, :string

  end

  slot :contributor, doc: "one contributor, drawn as a face" do

    attr :name, :string, required: true

    attr :src, :string

  end

  slot :language, doc: "one language" do

    attr :percent, :float, required: true

  end

  def repo_about(assigns) do

    assigns =

      assign(

        assigns,

        :overflow,

        max((assigns.contributors || 0) - length(assigns.contributor), 0)

      )

    ~H"""

    <aside class={["repo-about", @class]} aria-label="About this repository">

      <h2 class="repo-about__title">About</h2>

        </li>

      </ul>

      <div :if={@contributor != []} class="repo-about__contributors">

        <h3>

          Contributors <span class="repo-about__count">{@contributors || length(@contributor)}</span>

        </h3>

        <%!-- The count is the point. Six faces alone says the repository has

        six contributors, which is usually wrong. --%>

        <ul class="contributor-cluster">

          <li :for={person <- @contributor}>

            <.avatar

              src={person[:src]}

              fallback={String.first(person.name)}

              size={:sm}

              label={person.name}

            />

          </li>

          <li :if={@overflow > 0} class="contributor-cluster__count">+{@overflow}</li>

        </ul>

      </div>

      <div :if={@language != []} class="repo-about__languages">

        <h3>Languages</h3>

        <%!-- One bar, not a stack of bars: the proportions are the point, and

    """

  end

  @doc """

  A repository's home page, assembled.

  The pieces already exist on their own -- `breadcrumb/1` for the owner trail,

  `repo_tabs/1` for the sections, `file_table/1` for the tree, `repo_about/1`

  for the rail. This holds them in one frame so that a surface showing a

  repository does not reassemble that frame by hand and drift from the next

  surface that shows one.

  The rail is a second grid column above 1024px and falls below the tree under

  it. Provenance -- what this is, how it is licensed, who wrote it -- is what a

  reader wants beside the file list on a desktop and after it on a phone, and

  the source order is already the phone order.

  Composition is by slot rather than by attribute, so this owns the frame and

  nothing else: a caller that needs a tree with no rail, or a commit list where

  the tree usually goes, passes that instead without a flag being added here.

  """

  attr :owner, :string, required: true

  attr :repo, :string, required: true

  attr :owner_path, :string,

    default: nil,

    doc: "where the owner's name leads; `/OWNER` by default"

  attr :visibility, :atom, values: [:public, :private], default: :public

  attr :class, :any, default: nil

  attr :rest, :global

  slot :tabs, doc: "the section bar, normally one `repo_tabs/1`"

  slot :inner_block, required: true, doc: "the main column, normally one `file_table/1`"

  slot :about, doc: "the trailing rail, normally one `repo_about/1`"

  def repo_view(assigns) do

    assigns = assign(assigns, :owner_path, assigns.owner_path || "/#{assigns.owner}")

    ~H"""

    <div class={["repo-page", @class]} {@rest}>

      <header class="repo-page__identity">

        <%!-- Decorative: the owner's name is the next thing in the trail, and an

        initial announced ahead of it reads as a stray letter. --%>

        <.avatar

          fallback={String.upcase(String.first(@owner))}

          tone={:accent}

          aria-hidden="true"

        />

        <.breadcrumb class="repo-page__trail" label={"#{@owner} / #{@repo}"}>

          <:item navigate={@owner_path}>{@owner}</:item>

          <:item>{@repo}</:item>

        </.breadcrumb>

        <.badge variant={:dim}>{visibility_label(@visibility)}</.badge>

      </header>

      {render_slot(@tabs)}

      <div class="repo-view">

        <div class="repo-view__main">{render_slot(@inner_block)}</div>

        <div :if={@about != []} class="repo-view__rail">{render_slot(@about)}</div>

      </div>

    </div>

    """

  end

  defp visibility_label(:private), do: "Private"

  defp visibility_label(_visibility), do: "Public"

  @doc """

  One file's diff: a header, its hunks, and every line numbered on both sides.

    %{name: "Lena Fischer"}

  ]

  # This repository's own root, in the order `Browse.tree/3` returns it:

  # directories above files, each group by name. The message and age on a row

  # are what `git log -1 -- <path>` says about that path, and the sizes are the

  # real ones. The composed repository demo is only worth reading if the

  # composition is carrying real proportions -- invented data makes every

  # column look comfortable.

  @demo_repo_entries [

    %{

      name: "assets",

      kind: "tree",

      size: nil,

      message: "Delete the CONNECTED bar from the conversation",

      updated: "3 hours ago"

    },

    %{

      name: "config",

      kind: "tree",

      size: nil,

      message: "Connect staging fleet through Cloud SQL Auth Proxy",

      updated: "1 hour ago"

    },

    %{

      name: "docs",

      kind: "tree",

      size: nil,

      message: "Specify repository creation and the OpenAgents CLI",

      updated: "18 minutes ago"

    },

    %{

      name: "infra",

      kind: "tree",

      size: nil,

      message: "Connect staging fleet through Cloud SQL Auth Proxy",

      updated: "1 hour ago"

    },

    %{

      name: "lib",

      kind: "tree",

      size: nil,

      message: "Group the agent's surfaces under her name",

      updated: "15 minutes ago"

    },

    %{

      name: "priv",

      kind: "tree",

      size: nil,

      message: "Restore the power mark from v4 and v5 as the favicon",

      updated: "3 hours ago"

    },

    %{

      name: "test",

      kind: "tree",

      size: nil,

      message: "Give the modal scrim a token, and drop the guard's exception",

      updated: "5 hours ago"

    },

    %{

      name: ".formatter.exs",

      kind: "blob",

      size: 225,

      message: "Initialize Phoenix 1.8 application with latest dependencies",

      updated: "yesterday"

    },

    %{

      name: "AGENTS.md",

      kind: "blob",

      size: 28_064,

      message: "Authorize the theme bootstrap with a CSP nonce",

      updated: "9 hours ago"

    },

    %{

      name: "mix.exs",

      kind: "blob",

      size: 4_252,

      message: "Publish immutable staging candidate artifacts",

      updated: "9 hours ago"

    },

    %{

      name: "README.md",

      kind: "blob",

      size: 5_527,

      message: "Build isolated staging infrastructure",

      updated: "10 hours ago"

    }

  ]

  # Everyone `git shortlog -sn` names on this repository, most commits first.

  @demo_repo_contributors [%{name: "AtlantisPleb"}, %{name: "Christopher David"}]

  # The catalog demonstrates the preferred vendored Apps SDK tier. Heroicons

  # remains an exceptional fallback with an empty product-use inventory.

  @openagents_icons ~w(sparkle compass folder document user bell play star)

    """

  end

  defp component_demo(%{item: %{slug: "openagents-repo-tabs"}} = assigns) do

    ~H"""

    <div class="space-y-3">

      <p class="text-sm text-base-content/60">

        Seven links, not seven tabs. Each one changes the URL, so the selected entry

        is marked with <code>aria-current="page"</code>

        and the underline follows that attribute. Giving these a tab role would promise

        panels that swap in place, and a reader who accepted the promise and reached for

        the arrow keys would get nothing.

      </p>

      <UI.repo_tabs>

        <:tab icon="code" href="#code" current>Code</:tab>

        <:tab icon="empty-circle" href="#issues" count={12}>Issues</:tab>

        <:tab icon="pull-request-open" href="#pulls" count={3}>Pull requests</:tab>

        <:tab icon="cube" href="#projects">Projects</:tab>

        <:tab icon="book-open" href="#wiki">Wiki</:tab>

        <:tab icon="chart" href="#insights">Insights</:tab>

        <:tab icon="settings-cog" href="#settings">Settings</:tab>

      </UI.repo_tabs>

      <p class="text-sm text-base-content/60">

        The count sits in its own element rather than inside the word, so "Issues" stays

        findable by that word alone, the number keeps its own weight, and a narrow screen

        can drop it without anyone rewriting the label. The destinations here are page

        anchors, because the catalog has nowhere real to send you.

      </p>

    </div>

    """

  end

  defp component_demo(%{item: %{slug: "openagents-repo-view"}} = assigns) do

    assigns =

      assigns

      |> assign(:entries, @demo_repo_entries)

      |> assign(:contributors, @demo_repo_contributors)

    ~H"""

    <div class="space-y-3">

      <p class="text-sm text-base-content/60">

        Everything above, assembled: the owner trail from <code>breadcrumb/1</code>, the sections from <code>repo_tabs/1</code>, the tree from <code>file_table/1</code>, and the rail from <code>repo_about/1</code>. The frame

        itself is the only thing this component owns, which is why the three pieces arrive

        as slots — a surface that wants a commit list where the tree usually goes passes

        one, and no flag is added here.

      </p>

      <div class="-mx-6">

        <UI.repo_view

          owner="OpenAgentsInc"

          repo="openagents.com"

          owner_path={~p"/components/openagents-repo-view"}

        >

          <:tabs>

            <UI.repo_tabs>

              <:tab icon="code" href="#code" current>Code</:tab>

              <:tab icon="empty-circle" href="#issues" count={12}>Issues</:tab>

              <:tab icon="pull-request-open" href="#pulls" count={3}>Pull requests</:tab>

              <:tab icon="cube" href="#projects">Projects</:tab>

              <:tab icon="book-open" href="#wiki">Wiki</:tab>

              <:tab icon="chart" href="#insights">Insights</:tab>

              <:tab icon="settings-cog" href="#settings">Settings</:tab>

            </UI.repo_tabs>

          </:tabs>

          <UI.file_table

            owner="OpenAgentsInc"

            repo="openagents.com"

            ref="main"

            entries={@entries}

            branches={2}

            tags={0}

            commits={234}

          >

            <:actions>

              <UI.input

                id="demo-go-to-file"

                type="text"

                name="go-to-file"

                placeholder="Go to file"

                aria-label="Go to file"

                class="input file-table__search"

              />

              <UI.button size={:sm}>Add file</UI.button>

              <UI.button variant={:primary} size={:sm}>Code</UI.button>

            </:actions>

            <:commit>

              <UI.avatar size={:sm} fallback="A" label="AtlantisPleb" />

              <strong>AtlantisPleb</strong>

              <span>Group the agent's surfaces under her name</span>

              <code>86416fc</code>

              <span>15 minutes ago</span>

            </:commit>

          </UI.file_table>

          <:about>

            <UI.repo_about description="The Agent Forge" license="AGPL-3.0" contributors={2}>

              <:link icon="link" href="https://openagents.com">openagents.com</:link>

              <:link icon="book" navigate="/docs">Readme</:link>

              <:link icon="text" navigate="/changelog">Activity</:link>

              <:stat icon="star">2 stars</:stat>

              <:stat icon="eye">0 watching</:stat>

              <:stat icon="branch">0 forks</:stat>

              <:contributor :for={person <- @contributors} name={person.name} />

              <:language percent={91.8}>Elixir</:language>

              <:language percent={3.1}>CSS</:language>

              <:language percent={3.1}>Shell</:language>

              <:language percent={1.0}>JavaScript</:language>

              <:language percent={1.0}>Other</:language>

            </UI.repo_about>

          </:about>

        </UI.repo_view>

      </div>

      <p class="text-sm text-base-content/60">

        The tree, the commit subjects, the branch, the contributors, and the commit count

        are this repository's own — each row's message is what <code>git log -1 -- &lt;path&gt;</code>

        says about that path. A composed demo is only worth reading if the composition is

        carrying real proportions; invented ones make every column look comfortable.

      </p>

      <p class="text-sm text-base-content/60">

        The rail becomes a second column above 1024px and falls below the tree under it.

        Source order is already the narrow order, so nothing reorders: what a repository

        is, how it is licensed, and who wrote it are what a reader wants beside the file

        list on a desktop and after it on a phone.

      </p>

    </div>

    """

  end

  defp component_demo(%{item: %{slug: "openagents-diff-file"}} = assigns) do

    assigns =

      assign(

    assert has_element?(view, "#component-form")

  end

  test "the repository view page composes trail, sections, tree, and rail", %{conn: conn} do

    {:ok, view, _html} = live(conn, ~p"/components/openagents-repo-view")

    assert has_element?(view, ".repo-page .breadcrumb__current", "openagents.com")

    assert has_element?(view, ~s{.repo-tabs__tab[aria-current="page"]}, "Code")

    assert has_element?(view, ".repo-view__main .file-table .file-row__message")

    assert has_element?(view, ".repo-view__rail .repo-about__contributors")

  end

  test "repository sections are links, not a tab widget", %{conn: conn} do

    {:ok, view, _html} = live(conn, ~p"/components/openagents-repo-tabs")

    # A tab role promises panels that swap in place. These change the URL, so

    # the current one is marked by aria-current and nothing claims to be a tab.

    assert has_element?(view, "nav.repo-tabs[aria-label]")

    refute has_element?(view, ~s{.repo-tabs [role="tab"]})

    assert has_element?(view, ".repo-tabs__tab .repo-tabs__count", "12")

  end

  test "the catalog exposes no nonfunctional theme control", %{conn: conn} do

    {:ok, view, _html} = live(conn, ~p"/components")