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<h1>Protective Computing</h1>
<p class="tagline">
A systems-engineering discipline for software built under conditions of
<span class="accent">human vulnerability</span>—crisis, illness, coercion, displacement, and institutional instability.
It rejects the Stability Assumption and replaces it with enforceable constraints: reversibility, exposure minimization,
local authority, degraded functionality, coercion resistance, and essential utility.
</p>
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<a class="btn" href="docs/independent-review.html">Contribute Your Review</a>
<a class="btn" href="https://doi.org/10.5281/zenodo.18688516">Read the Overton Framework (v1.3)</a>
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<a class="btn" href="https://doi.org/10.5281/zenodo.18782339">Read the Field Guide (v0.1)</a>
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<span><span class="dot">●</span> License: <code>CC-BY 4.0 (Canon)</code></span>
<span><span class="dot">●</span> Scope: safety-critical HCI, privacy engineering, resilience</span>
<span><span class="dot">●</span> Anchor: <code>10.5281/zenodo.18887610</code></span>
<span><span class="dot">●</span> Theory / Overton Framework: <code>10.5281/zenodo.18688516</code></span>
</div>
</section>
<section class="card" style="margin-top:18px;">
<h2>Start Here</h2>
<div class="quick" aria-label="Suggested reading order">
<div class="q">
<div class="k">Step 1</div>
<h3><a href="docs/getting-started.html">Adopt the mindset</a></h3>
<p>Get the practical framing, vocabulary, and where Protective Computing fits in your engineering process.</p>
</div>
<div class="q">
<div class="k">Step 2</div>
<h3><a href="docs/spec/v1.0.html">Use the constraints</a></h3>
<p>Read the normative spec (MUST / SHOULD / MUST NOT) and apply it in design reviews and audits.</p>
</div>
<div class="q">
<div class="k">Step 3</div>
<h3><a href="docs/independent-review.html">Strengthen the canon</a></h3>
<p>Contribute independent review with concrete verification procedures and evidence expectations.</p>
</div>
</div>
</section>
<section class="card" style="margin-top:18px;">
<h2>Audit and Verification</h2>
<div class="quick" aria-label="Reviewer-oriented verification path">
<div class="q">
<div class="k">Verify 1</div>
<h3><a href="docs/audit-this-site.html">Audit this site</a></h3>
<p>Single-page reviewer entry point with the repo URL, exact audit commands, evidence locations, and expected pass signals.</p>
</div>
<div class="q">
<div class="k">Verify 2</div>
<h3><a href="docs/spec/v1.0.html">Read the canonical spec</a></h3>
<p>Normative MUST / SHOULD / MUST NOT requirements with concrete verification procedures and audit anchors.</p>
</div>
<div class="q">
<div class="k">Verify 3</div>
<h3><a href="docs/independent-review.html">Use the review checklist</a></h3>
<p>Independent review path for external critique, reproducible testing, and evidence expectations.</p>
</div>
</div>
</section>
<section class="card" style="margin-top:18px;">
<h2>Entry Pages</h2>
<div class="quick" aria-label="Search-intent entry pages">
<div class="q">
<div class="k">Entry 1</div>
<h3><a href="docs/stability-assumption.html">Stability Assumption (Stability Bias)</a></h3>
<p>What stability bias is, why it fails under crisis, and the protective constraints that replace it.</p>
</div>
<div class="q">
<div class="k">Entry 2</div>
<h3><a href="docs/offline-first-health-architecture.html">Offline-first health architecture</a></h3>
<p>A minimal, protective architecture for sensitive health apps: local authority, exposure minimization, and safe sync.</p>
</div>
<div class="q">
<div class="k">Entry 3</div>
<h3><a href="docs/trauma-informed-software-patterns.html">Trauma-informed software patterns</a></h3>
<p>Practical patterns for safety under stress: reversible actions, reduced disclosure, and deliberate degradation.</p>
</div>
<div class="q">
<div class="k">Entry 4</div>
<h3><a href="docs/audit-checklist.html">Protective Computing Audit Checklist</a></h3>
<p>A structured checklist for auditing software against all six Protective Computing principles, from coercion risk to degraded-mode utility.</p>
</div>
<div class="q">
<div class="k">Entry 5</div>
<h3><a href="docs/what-software-gets-wrong-about-instability.html">What software gets wrong about instability</a></h3>
<p>The seven structural failures of software under degraded conditions, from connectivity assumptions to coercion blindness.</p>
</div>
<div class="q">
<div class="k">Entry 6</div>
<h3><a href="docs/designing-for-coercion-resistance.html">Designing for coercion resistance</a></h3>
<p>How to audit software for coercion risk and design systems that protect users under institutional threat and forced disclosure.</p>
</div>
<div class="q">
<div class="k">Entry 7</div>
<h3><a href="docs/local-authority-vs-cloud-dependence.html">Local authority vs cloud dependence</a></h3>
<p>Why cloud-first architecture fails vulnerable users, and how local-authority design preserves agency under degraded or adversarial conditions.</p>
</div>
<div class="q">
<div class="k">Entry 8</div>
<h3><a href="docs/degraded-mode-ux-patterns.html">Degraded-mode UX patterns</a></h3>
<p>UX patterns and a practical checklist for software that must function under low battery, weak connectivity, and resource constraints.</p>
</div>
</div>
</section>
<section class="card" style="margin-top:18px;">
<h2>Problem Statement</h2>
<p style="margin:0;color:var(--muted);line-height:1.7;font-size:15px;">
Mainstream software is usually built on a Stability Assumption: persistent connectivity, predictable infrastructure,
cognitive surplus, environmental safety, and institutional trust. These assumptions fail under crisis, illness,
displacement, coercion, and systemic instability.
</p>
<ul class="list" style="margin-top:10px;">
<li>When stability assumptions fail, engagement-first systems produce lockout, disclosure, and irreversible harm.</li>
<li>These are structural failures, not edge cases, in high-risk operating environments.</li>
<li>Protective Computing replaces this model with enforceable constraints designed for degraded and adversarial conditions.</li>
</ul>
<p style="margin:10px 0 0;color:var(--muted);font-size:14px;line-height:1.6;">
Protective Computing formalizes a missing systems layer for environments where stability cannot be assumed.
</p>
</section>
<div class="grid">
<section class="card" style="grid-column: 1 / -1;">
<h2>Enforcement Pipeline</h2>
<div class="flow" aria-label="Normative enforcement stages">
<span class="stage">Stage 1: Metadata / Sitemap / Robots</span>
<span class="arrow">→</span>
<span class="stage">Stage 2: Completeness (no semantic blanks)</span>
<span class="arrow">→</span>
<span class="stage">Stage 3: Verification hardness (no weak methods)</span>
</div>
<ul class="list">
<li>Each stage is executed in CI on push and pull request.</li>
<li>Stage 3 fails if <code>WEAK_VERIFICATION_COUNT > 0</code>.</li>
<li>Current baseline: <code>WEAK_VERIFICATION_COUNT=0</code>.</li>
<li>Normative claims are tied to executable verification procedures and audited artifacts.</li>
</ul>
<div class="proof" aria-label="Proof of enforcement">
<strong style="color:var(--text);">Proof of Enforcement (snapshot)</strong><br>
<code>WEAK_VERIFICATION_COUNT=0</code> · <code>Stage 3 gate passed</code><br>
Verification status is continuously recomputed from the published ledger and fails CI on regression.
</div>
<p style="margin:10px 0 0;color:var(--muted);font-size:13px;line-height:1.6;">
Evidence:
<a href="docs/audit-this-site.html">audit this site</a>,
<a href="https://github.com/protective-computing/protective-computing.github.io/blob/main/.github/workflows/audit.yml">CI workflow</a>,
<a href="https://github.com/protective-computing/protective-computing.github.io/blob/main/scripts/semantic-ledger-audit.ps1">semantic gate script</a>,
<a href="https://github.com/protective-computing/protective-computing.github.io/tree/main/scripts/audit-output">audit artifacts</a>.
</p>
</section>
<section class="card" style="grid-column: 1 / -1;">
<h2>What Makes It Different</h2>
<table class="compare" aria-label="Conventional vs Protective comparison">
<thead>
<tr>
<th>Conventional Model</th>
<th>Protective Model</th>
</tr>
</thead>
<tbody>
<tr>
<td>Optimize retention and engagement</td>
<td>Optimize essential task completion under stress</td>
</tr>
<tr>
<td>Assume stability and persistent connectivity</td>
<td>Assume degradation and adversarial conditions</td>
</tr>
<tr>
<td>Centralize control and data authority</td>
<td>Preserve local authority and offline agency</td>
</tr>
<tr>
<td>Feature growth as default success signal</td>
<td>Essential utility with reversibility constraints</td>
</tr>
</tbody>
</table>
</section>
<section class="card">
<h2>Published Artifacts</h2>
<p style="margin:0 0 8px;color:var(--text);font-size:13.5px;font-weight:700;">Canonical Paper</p>
<ul class="list">
<li><a href="https://doi.org/10.5281/zenodo.18887610">Protective Computing Canon v1.0</a><br>
<span style="font-size:12.5px;color:var(--faint);">The structural overview of the discipline defining the theory, engineering practices, evaluation framework, and reference implementation.</span><br>
<span style="font-size:12.5px;color:var(--faint);">DOI: 10.5281/zenodo.18887610</span></li>
</ul>
<p style="margin:0 0 8px;color:var(--text);font-size:13.5px;font-weight:700;">Foundation</p>
<ul class="list">
<li><a href="https://doi.org/10.5281/zenodo.18688516">The Overton Framework v1.3</a><br>
<span style="font-size:12.5px;color:var(--faint);">Formal specification of Protective Computing principles</span></li>
</ul>
<p style="margin:12px 0 8px;color:var(--text);font-size:13.5px;font-weight:700;">Practice</p>
<ul class="list">
<li><a href="https://doi.org/10.5281/zenodo.18782339">Field Guide v0.1</a><br>
<span style="font-size:12.5px;color:var(--faint);">Operational companion for systems engineers</span></li>
</ul>
<p style="margin:12px 0 8px;color:var(--text);font-size:13.5px;font-weight:700;">Specification</p>
<ul class="list">
<li><a href="docs/spec/v1.0.html">Protective Computing Specification v1.0</a><br>
<span style="font-size:12.5px;color:var(--faint);">Normative requirements with verification procedures</span></li>
<li><a href="docs/spec/v1.0-must-justifications.html">MUST Justifications Ledger</a><br>
<span style="font-size:12.5px;color:var(--faint);">Rationale, threat tags, and status taxonomy for MUSTs</span></li>
</ul>
<p style="margin:12px 0 8px;color:var(--text);font-size:13.5px;font-weight:700;">Tooling</p>
<ul class="list">
<li><a href="PLS_RUBRIC_v1_0_rc1.pdf">Protective Legitimacy Score — Operational Rubric v1.0 (PDF)</a><br>
<span style="font-size:12.5px;color:var(--faint);">DOI: 10.5281/zenodo.18783432</span></li>
<li><a href="https://github.com/protective-computing/protective-computing.github.io/blob/main/IMPLEMENTATION_PATTERNS.md">Protective Design Patterns v0.1 (draft)</a></li>
<li><a href="https://github.com/protective-computing/protective-computing.github.io/blob/main/THREAT_MODELS.md">Threat Modeling Templates (draft)</a></li>
</ul>
<p style="margin:12px 0 0;color:var(--muted);font-size:13px;line-height:1.6;">
Full research corpus available on Zenodo:
<a href="https://zenodo.org/communities/protective-computing">Protective Computing Community Archive</a>
</p>
<div class="line"></div>
<h2>Core Principles</h2>
<div class="principles">
<a class="chip" href="docs/principles/reversibility.html">
<div class="chip-icon">⟲</div>
<div class="pname">Reversibility</div>
<div class="pdesc">User actions and system changes remain undoable; failures don’t become permanent harm.</div>
</a>
<a class="chip" href="docs/principles/exposure-minimization.html">
<div class="chip-icon">◐</div>
<div class="pname">Exposure Minimization</div>
<div class="pdesc">Reduce data surface by default; collect only what is essential, locally, with intent.</div>
</a>
<a class="chip" href="docs/principles/local-authority.html">
<div class="chip-icon">⬇</div>
<div class="pname">Local Authority</div>
<div class="pdesc">The user retains control even offline; autonomy survives institutional delay.</div>
</a>
<a class="chip" href="docs/principles/coercion-resistance.html">
<div class="chip-icon">🛡️</div>
<div class="pname">Coercion Resistance</div>
<div class="pdesc">Design for hostile contexts: pressure, surveillance, forced disclosure, compromised devices.</div>
</a>
<a class="chip" href="docs/principles/degraded-functionality.html">
<div class="chip-icon">⚡</div>
<div class="pname">Degraded Functionality</div>
<div class="pdesc">Operate under battery scarcity, network collapse, cognitive fatigue, and time pressure.</div>
</a>
<a class="chip" href="docs/principles/essential-utility.html">
<div class="chip-icon">◆</div>
<div class="pname">Essential Utility</div>
<div class="pdesc">Optimize for survival tasks, not engagement metrics; prioritize the critical path.</div>
</a>
</div>
</section>
<aside class="card soft">
<h2>Scope</h2>
<ul class="list">
<li>Safety-critical human–computer interaction</li>
<li>Privacy-first & local-first architectures</li>
<li>Resilience engineering & crisis-aware systems</li>
<li>Ethical computing under institutional instability</li>
</ul>
<div class="line"></div>
<h2>Use</h2>
<ul class="list">
<li>Reference: design reviews and risk audits</li>
<li>Specification: constraints for protective UX</li>
<li>Implementation: local-first, offline-capable systems</li>
</ul>
<div class="line"></div>
<h2>Evidence</h2>
<ul class="list">
<li><a href="docs/audit-this-site.html">Audit this site</a></li>
<li><a href="https://github.com/protective-computing/protective-computing.github.io/blob/main/AUDIT_EVIDENCE.md">Audit evidence index</a></li>
<li><a href="https://github.com/protective-computing/protective-computing.github.io/blob/main/COMPLIANCE_AUDIT_MATRIX.md">Compliance audit matrix</a></li>
<li><a href="https://github.com/protective-computing/protective-computing.github.io/blob/main/INDEPENDENT_REVIEW_CHECKLIST.md">Independent review checklist</a></li>
</ul>
<div class="line"></div>
<h2>How to cite</h2>
<p style="margin:0 0 8px;color:var(--muted);font-size:13px;line-height:1.6;">
Non-technical summary: design software that stays safe and useful when people are vulnerable and systems are unstable.
</p>
<p style="margin:0;color:var(--muted);font-size:13px;line-height:1.6;">
Cite the Canon (Structural Map) DOI:
<a href="https://doi.org/10.5281/zenodo.18887610">10.5281/zenodo.18887610</a><br>
Cite the Theory (Overton Framework v1.3) DOI:
<a href="https://doi.org/10.5281/zenodo.18688516">10.5281/zenodo.18688516</a>
</p>
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