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<header class="topbar"><a class="brand" href="#top"><span class="mark">A</span> field guide</a><nav class="chapter-links" aria-label="Chapter sections"><a href="#fleet">01 fleet</a><a href="#worktrees">02 worktrees</a><a href="#skills">03 skills</a></nav><div class="topbar-tools"><div class="lang-switch" aria-label="Language"><button class="active" data-lang="en" aria-pressed="true">EN</button><span>/</span><button data-lang="pt" aria-pressed="false">PT</button></div><span class="edition">AI ENGINEERING <i></i> 01 / 2026</span></div></header>
<section class="hero" id="top"><div><p class="eyebrow">A presentation for humans who ship</p><h1>AI for<br /><em>dummies.</em></h1><p class="lede">You do not need an army of models. You need a system: one mind to frame the work, several hands to execute it, and a clean boundary between every task.</p></div><aside class="hero-index"><span>FIELD NOTE / 001</span><strong>Ship the<br /><em>system.</em></strong><small>Skills · agents · worktrees · proof</small></aside></section>
<section class="hero-stats" aria-label="Chapter summary"><div><strong>01</strong><span>strong model<br />for ambiguity</span></div><div><strong>03</strong><span>bounded workers<br />in parallel</span></div><div><strong>∞</strong><span>iterations<br />with evidence</span></div><p>Read this as a route map, not a prompt recipe.</p></section>
<section class="thesis"><div><span>RULE ZERO</span><strong>Strong model for ambiguity.<br />Light model for bounded work.</strong></div><div class="signal" aria-hidden="true"><b>THINK</b><i></i><i></i><i></i><b>MAKE</b></div></section>
<section class="fleet" id="fleet"><div class="section-label"><span>A small fleet</span><span>coordination before parallelism</span></div><div class="fleet-grid"><article class="captain"><span>ORCHESTRATOR</span><h2>Decides what<br />needs to happen.</h2><code>Opus / reasoning</code></article><div class="arrow">→</div><div class="workers" role="group" aria-label="Worker agents"><button class="worker-card active" data-worker="ui" aria-pressed="true"><span>UI</span><strong>Component and visual states</strong><code>agent/ui</code></button><button class="worker-card" data-worker="tests" aria-pressed="false"><span>TEST</span><strong>Acceptance cases</strong><code>agent/tests</code></button><button class="worker-card" data-worker="docs" aria-pressed="false"><span>DOCS</span><strong>Guide and examples</strong><code>agent/docs</code></button></div></div><div class="worker-detail" id="worker-detail" aria-live="polite"></div><p class="caption">The orchestrator preserves intent, writes small contracts, and gathers results that can be verified. It does not need to type every line.</p></section>
<section class="failure-map"><div class="section-label"><span>Why the boundary matters</span><span>one vague task / three predictable failures</span></div><div class="failure-grid"><article><span>01</span><strong>Context soup</strong><p>Every worker reads everything. Nobody knows which facts are load-bearing.</p></article><article><span>02</span><strong>Branch collision</strong><p>Two agents touch the same checkout. The fastest path becomes conflict resolution.</p></article><article><span>03</span><strong>Confident drift</strong><p>The diff is polished, but no one checks whether it solved the original problem.</p></article></div></section>
<section class="workflow" aria-labelledby="workflow-title"><div class="copy"><p class="eyebrow">The subagent loop</p><h2 id="workflow-title">Click a phase.<br /><em>See the handoff.</em></h2><p>Delegation means moving one bounded task into a smaller context—not giving away responsibility.</p></div><div class="phase-tabs" role="tablist" aria-label="Workflow phases"><button class="active" data-phase="plan" role="tab" aria-selected="true"><b>01</b> PLAN</button><button data-phase="build" role="tab" aria-selected="false"><b>02</b> BUILD</button><button data-phase="review" role="tab" aria-selected="false"><b>03</b> REVIEW</button></div><article class="phase-panel" id="phase-panel" aria-live="polite"></article></section>
<section class="handoff"><div class="section-label"><span>What crosses contexts</span><span>brief → diff → evidence</span></div><table><thead><tr><th>Package</th><th>Contains</th><th>Why it matters</th></tr></thead><tbody><tr><th scope="row">Brief</th><td>goal, files, boundaries</td><td>stops the worker inventing the problem</td></tr><tr><th scope="row">Worktree</th><td>branch and isolated checkout</td><td>parallel edits do not collide</td></tr><tr><th scope="row">Checks</th><td>tests, build, criteria</td><td>turns “looks good” into evidence</td></tr><tr><th scope="row">Diff</th><td>small, reviewable change</td><td>integration and discard stay cheap</td></tr></tbody></table></section>
<section class="worktrees" id="worktrees"><div class="worktree-intro"><p class="eyebrow">Git worktrees</p><h2>One branch<br />per <em>hand.</em></h2><p>A worktree is another directory linked to the same repository. Each agent gets its own checkout and index; history remains shared.</p><p class="interaction-hint">Select a node to inspect its checkout, owner, and next action.</p></div><div class="tree-lab"><div class="tree-toolbar"><span>repository topology</span><span class="tree-live"><i></i> 4 checkouts</span></div><div class="tree-stage" role="tree" aria-label="Repository worktree topology"><svg viewBox="0 0 760 330" preserveAspectRatio="none" aria-hidden="true"><path class="tree-edge trunk" d="M380 48 V118"/><path class="tree-edge" d="M380 118 C380 170 110 150 110 224"/><path class="tree-edge" d="M380 118 V224"/><path class="tree-edge" d="M380 118 C380 170 650 150 650 224"/></svg><button class="tree-node root active" data-tree="main" role="treeitem" aria-selected="true"><span>ROOT</span><strong>main</strong><small>● clean</small></button><button class="tree-node branch ui" data-tree="ui" role="treeitem" aria-selected="false"><span>UI AGENT</span><strong>agent/ui</strong><small>3 files · working</small></button><button class="tree-node branch tests" data-tree="tests" role="treeitem" aria-selected="false"><span>TEST AGENT</span><strong>agent/tests</strong><small>8 checks · ready</small></button><button class="tree-node branch docs" data-tree="docs" role="treeitem" aria-selected="false"><span>DOCS AGENT</span><strong>agent/docs</strong><small>2 pages · review</small></button></div><article class="tree-detail" id="tree-detail" aria-live="polite"></article></div></section>
<section class="routing"><div><p class="eyebrow">Model routing</p><h2>Do not pay for<br />reasoning where<br />you need <em>rhythm.</em></h2><p class="interaction-hint">Choose a job to see why the model profile changes.</p></div><div class="route-console"><div class="route-table"><div class="head"><span>Work</span><span>Profile</span><span>Prompt shape</span></div><button class="active" data-route="plan" aria-pressed="true"><strong>Plan</strong><b>strong / broad</b><small>What changes? What can break?</small></button><button data-route="build" aria-pressed="false"><strong>Build</strong><b>fast / focused</b><small>Implement this slice. Run these checks.</small></button><button data-route="explore" aria-pressed="false"><strong>Explore</strong><b>read-only / light</b><small>Find where this contract is used.</small></button><button data-route="review" aria-pressed="false"><strong>Review</strong><b>independent</b><small>Does the diff satisfy the brief?</small></button></div><article class="route-detail" id="route-detail" aria-live="polite"></article></div></section>
<section class="skills" id="skills"><div><p class="eyebrow">Skills</p><h2>Write the right way<br /><em>once.</em></h2><p>A skill is a reusable procedure. It can carry instructions, references, scripts, and assets. It is not magical memory, and it does not replace acceptance criteria.</p><div class="skill-principles"><span>01 / trigger clearly</span><span>02 / load detail on demand</span><span>03 / return evidence</span></div></div><div class="skill-explorer"><div class="skill-package" role="tree" aria-label="Skill package files"><span>SKILL PACKAGE</span><button class="active" data-skill-file="skill" role="treeitem" aria-selected="true"><code>SKILL.md</code><small>procedure and limits</small></button><button data-skill-file="references" role="treeitem" aria-selected="false"><code>references/</code><small>facts to consult</small></button><button data-skill-file="scripts" role="treeitem" aria-selected="false"><code>scripts/</code><small>repeatable checks</small></button><button data-skill-file="assets" role="treeitem" aria-selected="false"><code>assets/</code><small>templates and examples</small></button></div><article class="skill-detail" id="skill-detail" aria-live="polite"></article></div><pre><code>name: review-ui · check focus, mobile, reduced motion · run verification · return evidence</code></pre></section>
<aside class="rule"><span>THE HUMAN JOB</span><strong>The agent may be autonomous in execution. Intent, boundaries, and evidence remain yours.</strong></aside><aside class="callout"><span>START HERE</span><strong>Begin with one agent and one skill. Add parallelism only when the tasks are truly independent.</strong></aside>
<section class="sources"><div class="section-label"><span>Keep learning</span><span>12 new readings + primary docs</span></div><p>Go deeper with official documentation, production case studies, Medium, and practitioner workflows. <a href="docs/references/README.md">Primary references →</a> <a href="docs/references/additional-reading.md">12-part reading path →</a></p></section>
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