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aria-label="breadcrumbs"><div class="breadcrumb-element"><a href="../">Home</a><p> </p></div><div class="breadcrumb-element"><a href="../comparisons/">comparisons</a><p> </p></div><div class="breadcrumb-element"><a href>Memory Backends</a></div></nav><h1 class="article-title">Memory Backends</h1><details class="note-properties metadata-container" open data-collapsed="false"><summary class="note-properties-header"><span class="note-properties-title">Properties</span><span class="note-properties-count">1</span></summary><table class="note-properties-table"><tbody><tr class="note-properties-row metadata-property"><td class="note-properties-key metadata-property-key">tags</td><td class="note-properties-value metadata-property-value"><span class="note-properties-tags"><a href="../tags/comparison" class="internal internal-link tag-link">comparison</a><span class="note-properties-separator">, </span><a href="../tags/memory" class="internal internal-link tag-link">memory</a></span></td></tr></tbody></table></details><p show-comma="true" class="content-meta"><time datetime="2026-08-11T16:00:00.000Z">Aug 12, 2026</time><span>2 min read</span></p></div></div><article class="popover-hint"><div class="markdown-preview-view markdown-rendered"><h1 id="memory-backends">Memory Backends<a role="anchor" aria-hidden="true" tabindex="-1" data-no-popover="true" href="#memory-backends" class="internal internal-link"><svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71"></path><path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71"></path></svg></a></h1>
<h2 id="purpose">Purpose<a role="anchor" aria-hidden="true" tabindex="-1" data-no-popover="true" href="#purpose" class="internal internal-link"><svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71"></path><path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71"></path></svg></a></h2>
<p>Document Hermess memory backend on this box, and record why the taxonomy this page assumed (Hindsight, Mnemosyne, file-backed) doesnt actually apply here.</p>
<h2 id="correction-2026-07-22-per-anthony">Correction (2026-07-22, per Anthony)<a role="anchor" aria-hidden="true" tabindex="-1" data-no-popover="true" href="#correction-2026-07-22-per-anthony" class="internal internal-link"><svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71"></path><path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71"></path></svg></a></h2>
<p>This wiki previously stated Hindsight was this boxs predecessor memory backend, based on archived <code>hindsight-*</code> script names found under <code>~/.hermes/scripts/</code> and a “Hindsight clean memory bank” mention in <code>current-state.md</code>. <strong>That was wrong — Hindsight has nothing to do with this Hermes box.</strong> It was confused with a different Hermes instance (most likely ct450 “hermesagent”, the older/original Hermes install still running in this homelab — see <a href="../infrastructure/domains-and-tunnels" class="internal internal-link" data-slug="infrastructure/domains-and-tunnels">domains-and-tunnels</a>). All Hindsight-specific pages (<code>systems/hindsight.md</code>, <code>decisions/use-hindsight-for-memory.md</code>, <code>runbooks/check-hindsight.md</code>) have been deleted rather than left as deprecated stubs, since they describe something that was never true of this box.</p>
<p>The three archived scripts (<code>hindsight-watchdog.py.archived</code>, <code>hindsight_migration_watchdog.py.archived</code>, <code>honcho_to_hindsight_import.py.archived</code>) that had been sitting under <code>~/.hermes/scripts/</code> were removed on 2026-07-22 at Anthonys request, closing out the mix-up entirely.</p>
<h2 id="whats-actually-true-here">Whats actually true here<a role="anchor" aria-hidden="true" tabindex="-1" data-no-popover="true" href="#whats-actually-true-here" class="internal internal-link"><svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71"></path><path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71"></path></svg></a></h2>
<ul>
<li><strong>Only backend ever verified on this box: Mnemosyne</strong> — local native plugin (<code>~/.hermes/plugins/mnemosyne</code>), not a docker service. See <a href="../systems/mnemosyne" class="internal internal-link" data-slug="systems/mnemosyne">mnemosyne</a> and <a href="../systems/memory-backend" class="internal internal-link" data-slug="systems/memory-backend">memory-backend</a> for full config.</li>
<li>No evidence of a file-backed-only memory mode being used either — its Mnemosyne or nothing on this install.</li>
</ul>
<h2 id="openviking-evaluation-2026-08-12--not-adopted">OpenViking evaluation (2026-08-12) — NOT adopted<a role="anchor" aria-hidden="true" tabindex="-1" data-no-popover="true" href="#openviking-evaluation-2026-08-12--not-adopted" class="internal internal-link"><svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71"></path><path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71"></path></svg></a></h2>
<ul>
<li>Anthony explored <strong>OpenViking</strong> (Volcengine/ByteDance context database, filesystem-style knowledge hierarchy, tiered retrieval, 6-category auto extraction) as a potential memory provider.</li>
<li><strong>Not adopted:</strong> <code>memory.provider</code> is single-slot — setting <code>hermes config set memory.provider openviking</code> would fully <strong>replace</strong> Mnemosyne, with no parallel/dual-active mode.</li>
<li>Risk assessment flagged: schema mismatch, embedding drift, scope leakage, provenance loss, and one-way/no-rollback migration with no dry-run snapshot.</li>
<li><strong>Verdict:</strong> stay on Mnemosyne. Config verified <code>memory.provider: mnemosyne</code> (2026-08-12). No migration was performed.</li>
</ul>
<h2 id="related">Related<a role="anchor" aria-hidden="true" tabindex="-1" data-no-popover="true" href="#related" class="internal internal-link"><svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71"></path><path d="M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71"></path></svg></a></h2>
<ul>
<li><a href="../systems/mnemosyne" class="internal internal-link" data-slug="systems/mnemosyne">mnemosyne</a></li>
<li><a href="../systems/memory-backend" class="internal internal-link" data-slug="systems/memory-backend">memory-backend</a></li>
<li><a href="../concepts/agent-memory" class="internal internal-link" data-slug="concepts/agent-memory">agent-memory</a></li>
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