Post list from taxonomy not working

{% for post in taxonomy.findTaxonomy({'category': ['patterns']}) %}
    <tr>
      <td class="title">{{ post.title }}</td>
      <td class="summary">{{ post.summary }}</td>
      <td class="link"><i class="fa fa-rocket"></i> <a href="{{ post.url }}" title="view the {{ post.title }} micro-pattern">view it!</a></td>
    </tr>
  {% endfor %}

{% for post in taxonomy.findTaxonomy({'category': 'patterns'}) %}
{% for post in taxonomy.findTaxonomy({'category': [patterns]}) %}

{{ debug(taxonomy.findTaxonomy({'category': ['patterns']})) }}
---

title: Header
taxonomy:
  category: [gui-design, patterns]
  tag: [Brand,PuppetEnterprise,ElapsedTime]

twig_first: true
process:
  twig: true

body_classes: "pattern definition"

status: incomplete

micro_patterns:
  enabled: true
  mpNames: [Buttons,TimeStamp,EmptyTable,LipBalm]

{% if header.micro_patterns.enabled %}
          <section class="micro-patterns">
            <header>
              <h3><i class="fa fa-cubes"></i> Micro-patterns</h3>
              <hr>
            </header>
            <article>
              <table class="definition-table">
                <thead>
                  <tr>
                    <th class="title">Title</th>
                    <th class="link">Link</th>
                  </tr>
                </thead>
                <tbody>
                  {% for i, mpost in taxonomy.findTaxonomy({'category': ['patterns']}) %}
                    {% for j, name in header.micro_patterns.mpNames %}
                    {% if (name == mpost.title) %} 
                    <tr>
                      <td class="title">{{ name }}</td>
                      <td class="link"><i class="fa fa-rocket"></i> <a href="{{ mpost.url }}" title="view the {{ mpost.title }} micro-pattern">view it!</a></td>
                    </tr>
                    {% endif %}
                    {% endfor %}
                  {% endfor %}
                </tbody>
              </table>
            </article>
          </section>
        {% endif %}