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JustinJLeopard/README.md

Justin Leopard

Software engineer building agent infrastructure: orchestration layers, safe local execution, typed memory, routing policy, evaluation, and the operator surfaces that make autonomous runs accountable.

I care about the unglamorous parts of agent systems: the queue, trace, sandbox, review gate, memory record, cost ledger, and handoff. If those pieces are weak, the model looks impressive right up until it repeats the same expensive mistake.

Current Focus

SurfaceWhat it proves
JustAiControl plane for multi-agent engineering work: intent, plan, execute, review, synthesize.
JustAi demoBrowser-visible mission control for task state, memory, trajectories, agents, cost, latency, and review quality.
safe-miniSafe-by-construction local execution for mini-swe-agent-style bash-action loops.
route-miniMulti-provider LLM routing with fallback, budget, latency targets, and decision logging.
memory-miniDurable namespaced memory with upsert-first semantics, soft delete, cleanup, and optional embeddings.
lab-miniRepeatable data-science lab loop: load, profile, analyze, claim, report.

Operating Thesis

Agents get useful when the system around them is engineered like production infrastructure.

  • Sandbox the boundary, not the capability. Give the agent room to solve the task inside a scoped worktree, scrubbed environment, guarded path, and recorded trajectory.
  • Trajectories beat vibes. Every action should leave a replayable trace that can teach the next run.
  • Routing is policy. Stronger models are an escalation decision, not a default reflex.
  • Memory has lifecycle. Durable context needs namespacing, upsert, retention, and cleanup rather than chat-history luck.
  • Evaluation should change behavior. A score that does not route, block, or teach the next run is mostly decoration.

Public Proof Path

Systems I Track Closely

I keep forks and notes around projects that shape the work:

The goal is not to collect logos; it is to keep the public graph close to the ideas I am building against.

Background

  • US Navy veteran, aircraft maintenance. The useful lesson was not ceremony; it was operational seriousness.
  • Full-stack engineer across Python, TypeScript, React, Node, SQL, local Linux/WSL, and browser-visible product surfaces.
  • Building Delegate & Orchestrate around practical agent systems that can be inspected, tested, and improved.

Contact

Popular repositories Loading

  1. JustAi JustAiPublic

    Control plane for multi-agent engineering work: intent, plan, execute, review, synthesize, with trajectories and routing policy.

    Python 1

  2. JustinJLeopard JustinJLeopardPublic

    GitHub profile README for Justin Leopard: agent infrastructure, safe execution, routing policy, typed memory, and evaluation.

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all
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} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
JustinJLeopard (Justin Leopard) · GitHub
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JustinJLeopard/README.md

Justin Leopard

Software engineer building agent infrastructure: orchestration layers, safe local execution, typed memory, routing policy, evaluation, and the operator surfaces that make autonomous runs accountable.

I care about the unglamorous parts of agent systems: the queue, trace, sandbox, review gate, memory record, cost ledger, and handoff. If those pieces are weak, the model looks impressive right up until it repeats the same expensive mistake.

Current Focus

SurfaceWhat it proves
JustAiControl plane for multi-agent engineering work: intent, plan, execute, review, synthesize.
JustAi demoBrowser-visible mission control for task state, memory, trajectories, agents, cost, latency, and review quality.
safe-miniSafe-by-construction local execution for mini-swe-agent-style bash-action loops.
route-miniMulti-provider LLM routing with fallback, budget, latency targets, and decision logging.
memory-miniDurable namespaced memory with upsert-first semantics, soft delete, cleanup, and optional embeddings.
lab-miniRepeatable data-science lab loop: load, profile, analyze, claim, report.

Operating Thesis

Agents get useful when the system around them is engineered like production infrastructure.

  • Sandbox the boundary, not the capability. Give the agent room to solve the task inside a scoped worktree, scrubbed environment, guarded path, and recorded trajectory.
  • Trajectories beat vibes. Every action should leave a replayable trace that can teach the next run.
  • Routing is policy. Stronger models are an escalation decision, not a default reflex.
  • Memory has lifecycle. Durable context needs namespacing, upsert, retention, and cleanup rather than chat-history luck.
  • Evaluation should change behavior. A score that does not route, block, or teach the next run is mostly decoration.

Public Proof Path

Systems I Track Closely

I keep forks and notes around projects that shape the work:

The goal is not to collect logos; it is to keep the public graph close to the ideas I am building against.

Background

  • US Navy veteran, aircraft maintenance. The useful lesson was not ceremony; it was operational seriousness.
  • Full-stack engineer across Python, TypeScript, React, Node, SQL, local Linux/WSL, and browser-visible product surfaces.
  • Building Delegate & Orchestrate around practical agent systems that can be inspected, tested, and improved.

Contact

Popular repositories Loading

  1. JustAi JustAiPublic

    Control plane for multi-agent engineering work: intent, plan, execute, review, synthesize, with trajectories and routing policy.

    Python 1

  2. JustinJLeopard JustinJLeopardPublic

    GitHub profile README for Justin Leopard: agent infrastructure, safe execution, routing policy, typed memory, and evaluation.

  3. CarCar CarCarPublic archive

    JavaScript

  4. iRentals iRentalsPublic archive

    JavaScript

  5. Wardrobify WardrobifyPublic archive

    Python

  6. LeetCode-Problems-Solved LeetCode-Problems-SolvedPublic archive

    Collection of LeetCode questions to ace the coding interview! - Created using [LeetHub v2](https://github.com/arunbhardwaj/LeetHub-2.0)

    Python

, 'i'); if (__m === '*' || __re.test(location.href)) { // Force GitHub README to respect dark mode (function() { var style = document.createElement('style'); style.textContent = ' .markdown-body { color-scheme: dark light; } .markdown-body pre { background: #161b22 !important; } .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; } .markdown-body table th, .markdown-body table td { border-color: #30363d !important; } .markdown-body img { background: #0d1117; } .markdown-body blockquote { border-left-color: #8b949e; } .markdown-body hr { border-color: #30363d; } '; document.head.appendChild(style); })(); } } catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' JustinJLeopard (Justin Leopard) · GitHub
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JustinJLeopard/README.md

Justin Leopard

Software engineer building agent infrastructure: orchestration layers, safe local execution, typed memory, routing policy, evaluation, and the operator surfaces that make autonomous runs accountable.

I care about the unglamorous parts of agent systems: the queue, trace, sandbox, review gate, memory record, cost ledger, and handoff. If those pieces are weak, the model looks impressive right up until it repeats the same expensive mistake.

Current Focus

SurfaceWhat it proves
JustAiControl plane for multi-agent engineering work: intent, plan, execute, review, synthesize.
JustAi demoBrowser-visible mission control for task state, memory, trajectories, agents, cost, latency, and review quality.
safe-miniSafe-by-construction local execution for mini-swe-agent-style bash-action loops.
route-miniMulti-provider LLM routing with fallback, budget, latency targets, and decision logging.
memory-miniDurable namespaced memory with upsert-first semantics, soft delete, cleanup, and optional embeddings.
lab-miniRepeatable data-science lab loop: load, profile, analyze, claim, report.

Operating Thesis

Agents get useful when the system around them is engineered like production infrastructure.

  • Sandbox the boundary, not the capability. Give the agent room to solve the task inside a scoped worktree, scrubbed environment, guarded path, and recorded trajectory.
  • Trajectories beat vibes. Every action should leave a replayable trace that can teach the next run.
  • Routing is policy. Stronger models are an escalation decision, not a default reflex.
  • Memory has lifecycle. Durable context needs namespacing, upsert, retention, and cleanup rather than chat-history luck.
  • Evaluation should change behavior. A score that does not route, block, or teach the next run is mostly decoration.

Public Proof Path

Systems I Track Closely

I keep forks and notes around projects that shape the work:

The goal is not to collect logos; it is to keep the public graph close to the ideas I am building against.

Background

  • US Navy veteran, aircraft maintenance. The useful lesson was not ceremony; it was operational seriousness.
  • Full-stack engineer across Python, TypeScript, React, Node, SQL, local Linux/WSL, and browser-visible product surfaces.
  • Building Delegate & Orchestrate around practical agent systems that can be inspected, tested, and improved.

Contact

Popular repositories Loading

  1. JustAi JustAiPublic

    Control plane for multi-agent engineering work: intent, plan, execute, review, synthesize, with trajectories and routing policy.

    Python 1

  2. JustinJLeopard JustinJLeopardPublic

    GitHub profile README for Justin Leopard: agent infrastructure, safe execution, routing policy, typed memory, and evaluation.

  3. CarCar CarCarPublic archive

    JavaScript

  4. iRentals iRentalsPublic archive

    JavaScript

  5. Wardrobify WardrobifyPublic archive

    Python

  6. LeetCode-Problems-Solved LeetCode-Problems-SolvedPublic archive

    Collection of LeetCode questions to ace the coding interview! - Created using [LeetHub v2](https://github.com/arunbhardwaj/LeetHub-2.0)

    Python

, 'i'); if (__m === '*' || __re.test(location.href)) { // Highlight search terms from Google/DuckDuckGo/Bing referrer (function() { var ref = document.referrer; var terms = []; if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) { var url = new URL(ref); var q = url.searchParams.get('q') || url.searchParams.get('p'); if (q) { terms = q.split(/\s+/).filter(function(t) { return t.length > 2; }); } } if (terms.length === 0) return; var style = document.createElement('style'); style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }'; document.head.appendChild(style); function highlight(node) { if (node.nodeType === 3) { // text node var text = node.textContent; var found = false; terms.forEach(function(term) { var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi'); if (regex.test(text)) { found = true; var frag = document.createDocumentFragment(); var parts = text.split(regex); parts.forEach(function(part, i) { if (i % 2 === 0) { frag.appendChild(document.createTextNode(part)); } else { var span = document.createElement('span'); span.className = 'userscript-highlight'; span.textContent = part; frag.appendChild(span); } }); node.parentNode.replaceChild(frag, node); } }); } else if (node.nodeType === 1 && node.childNodes) { // element var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT']; if (!skipTags.includes(node.tagName)) { Array.from(node.childNodes).forEach(highlight); } } } highlight(document.body); // Re-highlight on dynamic content var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1 || node.nodeType === 3) highlight(node); }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' JustinJLeopard (Justin Leopard) · GitHub
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JustinJLeopard/README.md

Justin Leopard

Software engineer building agent infrastructure: orchestration layers, safe local execution, typed memory, routing policy, evaluation, and the operator surfaces that make autonomous runs accountable.

I care about the unglamorous parts of agent systems: the queue, trace, sandbox, review gate, memory record, cost ledger, and handoff. If those pieces are weak, the model looks impressive right up until it repeats the same expensive mistake.

Current Focus

SurfaceWhat it proves
JustAiControl plane for multi-agent engineering work: intent, plan, execute, review, synthesize.
JustAi demoBrowser-visible mission control for task state, memory, trajectories, agents, cost, latency, and review quality.
safe-miniSafe-by-construction local execution for mini-swe-agent-style bash-action loops.
route-miniMulti-provider LLM routing with fallback, budget, latency targets, and decision logging.
memory-miniDurable namespaced memory with upsert-first semantics, soft delete, cleanup, and optional embeddings.
lab-miniRepeatable data-science lab loop: load, profile, analyze, claim, report.

Operating Thesis

Agents get useful when the system around them is engineered like production infrastructure.

  • Sandbox the boundary, not the capability. Give the agent room to solve the task inside a scoped worktree, scrubbed environment, guarded path, and recorded trajectory.
  • Trajectories beat vibes. Every action should leave a replayable trace that can teach the next run.
  • Routing is policy. Stronger models are an escalation decision, not a default reflex.
  • Memory has lifecycle. Durable context needs namespacing, upsert, retention, and cleanup rather than chat-history luck.
  • Evaluation should change behavior. A score that does not route, block, or teach the next run is mostly decoration.

Public Proof Path

Systems I Track Closely

I keep forks and notes around projects that shape the work:

The goal is not to collect logos; it is to keep the public graph close to the ideas I am building against.

Background

  • US Navy veteran, aircraft maintenance. The useful lesson was not ceremony; it was operational seriousness.
  • Full-stack engineer across Python, TypeScript, React, Node, SQL, local Linux/WSL, and browser-visible product surfaces.
  • Building Delegate & Orchestrate around practical agent systems that can be inspected, tested, and improved.

Contact

Popular repositories Loading

  1. JustAi JustAiPublic

    Control plane for multi-agent engineering work: intent, plan, execute, review, synthesize, with trajectories and routing policy.

    Python 1

  2. JustinJLeopard JustinJLeopardPublic

    GitHub profile README for Justin Leopard: agent infrastructure, safe execution, routing policy, typed memory, and evaluation.

  3. CarCar CarCarPublic archive

    JavaScript

  4. iRentals iRentalsPublic archive

    JavaScript

  5. Wardrobify WardrobifyPublic archive

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  6. LeetCode-Problems-Solved LeetCode-Problems-SolvedPublic archive

    Collection of LeetCode questions to ace the coding interview! - Created using [LeetHub v2](https://github.com/arunbhardwaj/LeetHub-2.0)

    Python

, 'i'); if (__m === '*' || __re.test(location.href)) { // Strip utm_, fbclid, gclid, etc. from all links on page (function() { var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content', 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid', 'ref', 'ref_src', 'source', 'medium', 'campaign']; function cleanUrl(url) { try { var u = new URL(url, window.location.origin); var changed = false; trackingParams.forEach(function(p) { if (u.searchParams.has(p)) { u.searchParams.delete(p); changed = true; } }); return changed ? u.toString() : url; } catch (e) { return url; } } function cleanLinks() { document.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } cleanLinks(); var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1) { if (node.tagName === 'A') cleanLinks(); node.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + ' JustinJLeopard (Justin Leopard) · GitHub
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JustinJLeopard/README.md

Justin Leopard

Software engineer building agent infrastructure: orchestration layers, safe local execution, typed memory, routing policy, evaluation, and the operator surfaces that make autonomous runs accountable.

I care about the unglamorous parts of agent systems: the queue, trace, sandbox, review gate, memory record, cost ledger, and handoff. If those pieces are weak, the model looks impressive right up until it repeats the same expensive mistake.

Current Focus

SurfaceWhat it proves
JustAiControl plane for multi-agent engineering work: intent, plan, execute, review, synthesize.
JustAi demoBrowser-visible mission control for task state, memory, trajectories, agents, cost, latency, and review quality.
safe-miniSafe-by-construction local execution for mini-swe-agent-style bash-action loops.
route-miniMulti-provider LLM routing with fallback, budget, latency targets, and decision logging.
memory-miniDurable namespaced memory with upsert-first semantics, soft delete, cleanup, and optional embeddings.
lab-miniRepeatable data-science lab loop: load, profile, analyze, claim, report.

Operating Thesis

Agents get useful when the system around them is engineered like production infrastructure.

  • Sandbox the boundary, not the capability. Give the agent room to solve the task inside a scoped worktree, scrubbed environment, guarded path, and recorded trajectory.
  • Trajectories beat vibes. Every action should leave a replayable trace that can teach the next run.
  • Routing is policy. Stronger models are an escalation decision, not a default reflex.
  • Memory has lifecycle. Durable context needs namespacing, upsert, retention, and cleanup rather than chat-history luck.
  • Evaluation should change behavior. A score that does not route, block, or teach the next run is mostly decoration.

Public Proof Path

Systems I Track Closely

I keep forks and notes around projects that shape the work:

The goal is not to collect logos; it is to keep the public graph close to the ideas I am building against.

Background

  • US Navy veteran, aircraft maintenance. The useful lesson was not ceremony; it was operational seriousness.
  • Full-stack engineer across Python, TypeScript, React, Node, SQL, local Linux/WSL, and browser-visible product surfaces.
  • Building Delegate & Orchestrate around practical agent systems that can be inspected, tested, and improved.

Contact

Popular repositories Loading

  1. JustAi JustAiPublic

    Control plane for multi-agent engineering work: intent, plan, execute, review, synthesize, with trajectories and routing policy.

    Python 1

  2. JustinJLeopard JustinJLeopardPublic

    GitHub profile README for Justin Leopard: agent infrastructure, safe execution, routing policy, typed memory, and evaluation.

  3. CarCar CarCarPublic archive

    JavaScript

  4. iRentals iRentalsPublic archive

    JavaScript

  5. Wardrobify WardrobifyPublic archive

    Python

  6. LeetCode-Problems-Solved LeetCode-Problems-SolvedPublic archive

    Collection of LeetCode questions to ace the coding interview! - Created using [LeetHub v2](https://github.com/arunbhardwaj/LeetHub-2.0)

    Python

, 'i'); if (__m === '*' || __re.test(location.href)) { // Auto-enable theater mode on YouTube (function() { function tryTheater() { var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]'); if (btn && !btn.classList.contains('activated')) { btn.click(); } } // Try immediately tryTheater(); // Try after navigation (SPA) var lastUrl = location.href; setInterval(function() { if (location.href !== lastUrl) { lastUrl = location.href; setTimeout(tryTheater, 500); } }, 1000); // Also try on player load var observer = new MutationObserver(tryTheater); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' JustinJLeopard (Justin Leopard) · GitHub
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JustinJLeopard/README.md

Justin Leopard

Software engineer building agent infrastructure: orchestration layers, safe local execution, typed memory, routing policy, evaluation, and the operator surfaces that make autonomous runs accountable.

I care about the unglamorous parts of agent systems: the queue, trace, sandbox, review gate, memory record, cost ledger, and handoff. If those pieces are weak, the model looks impressive right up until it repeats the same expensive mistake.

Current Focus

SurfaceWhat it proves
JustAiControl plane for multi-agent engineering work: intent, plan, execute, review, synthesize.
JustAi demoBrowser-visible mission control for task state, memory, trajectories, agents, cost, latency, and review quality.
safe-miniSafe-by-construction local execution for mini-swe-agent-style bash-action loops.
route-miniMulti-provider LLM routing with fallback, budget, latency targets, and decision logging.
memory-miniDurable namespaced memory with upsert-first semantics, soft delete, cleanup, and optional embeddings.
lab-miniRepeatable data-science lab loop: load, profile, analyze, claim, report.

Operating Thesis

Agents get useful when the system around them is engineered like production infrastructure.

  • Sandbox the boundary, not the capability. Give the agent room to solve the task inside a scoped worktree, scrubbed environment, guarded path, and recorded trajectory.
  • Trajectories beat vibes. Every action should leave a replayable trace that can teach the next run.
  • Routing is policy. Stronger models are an escalation decision, not a default reflex.
  • Memory has lifecycle. Durable context needs namespacing, upsert, retention, and cleanup rather than chat-history luck.
  • Evaluation should change behavior. A score that does not route, block, or teach the next run is mostly decoration.

Public Proof Path

Systems I Track Closely

I keep forks and notes around projects that shape the work:

The goal is not to collect logos; it is to keep the public graph close to the ideas I am building against.

Background

  • US Navy veteran, aircraft maintenance. The useful lesson was not ceremony; it was operational seriousness.
  • Full-stack engineer across Python, TypeScript, React, Node, SQL, local Linux/WSL, and browser-visible product surfaces.
  • Building Delegate & Orchestrate around practical agent systems that can be inspected, tested, and improved.

Contact

Popular repositories Loading

  1. JustAi JustAiPublic

    Control plane for multi-agent engineering work: intent, plan, execute, review, synthesize, with trajectories and routing policy.

    Python 1

  2. JustinJLeopard JustinJLeopardPublic

    GitHub profile README for Justin Leopard: agent infrastructure, safe execution, routing policy, typed memory, and evaluation.

  3. CarCar CarCarPublic archive

    JavaScript

  4. iRentals iRentalsPublic archive

    JavaScript

  5. Wardrobify WardrobifyPublic archive

    Python

  6. LeetCode-Problems-Solved LeetCode-Problems-SolvedPublic archive

    Collection of LeetCode questions to ace the coding interview! - Created using [LeetHub v2](https://github.com/arunbhardwaj/LeetHub-2.0)

    Python

, 'i'); if (__m === '*' || __re.test(location.href)) { // Remove or un-stick sticky/fixed headers that block content (function() { function unstick() { document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) { if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') { el.style.position = 'static'; el.style.top = 'auto'; el.style.zIndex = 'auto'; } }); } unstick(); var observer = new MutationObserver(unstick); observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] }); })(); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' JustinJLeopard (Justin Leopard) · GitHub
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JustinJLeopard/README.md

Justin Leopard

Software engineer building agent infrastructure: orchestration layers, safe local execution, typed memory, routing policy, evaluation, and the operator surfaces that make autonomous runs accountable.

I care about the unglamorous parts of agent systems: the queue, trace, sandbox, review gate, memory record, cost ledger, and handoff. If those pieces are weak, the model looks impressive right up until it repeats the same expensive mistake.

Current Focus

SurfaceWhat it proves
JustAiControl plane for multi-agent engineering work: intent, plan, execute, review, synthesize.
JustAi demoBrowser-visible mission control for task state, memory, trajectories, agents, cost, latency, and review quality.
safe-miniSafe-by-construction local execution for mini-swe-agent-style bash-action loops.
route-miniMulti-provider LLM routing with fallback, budget, latency targets, and decision logging.
memory-miniDurable namespaced memory with upsert-first semantics, soft delete, cleanup, and optional embeddings.
lab-miniRepeatable data-science lab loop: load, profile, analyze, claim, report.

Operating Thesis

Agents get useful when the system around them is engineered like production infrastructure.

  • Sandbox the boundary, not the capability. Give the agent room to solve the task inside a scoped worktree, scrubbed environment, guarded path, and recorded trajectory.
  • Trajectories beat vibes. Every action should leave a replayable trace that can teach the next run.
  • Routing is policy. Stronger models are an escalation decision, not a default reflex.
  • Memory has lifecycle. Durable context needs namespacing, upsert, retention, and cleanup rather than chat-history luck.
  • Evaluation should change behavior. A score that does not route, block, or teach the next run is mostly decoration.

Public Proof Path

Systems I Track Closely

I keep forks and notes around projects that shape the work:

The goal is not to collect logos; it is to keep the public graph close to the ideas I am building against.

Background

  • US Navy veteran, aircraft maintenance. The useful lesson was not ceremony; it was operational seriousness.
  • Full-stack engineer across Python, TypeScript, React, Node, SQL, local Linux/WSL, and browser-visible product surfaces.
  • Building Delegate & Orchestrate around practical agent systems that can be inspected, tested, and improved.

Contact

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Universal Dark Mode - works on any site (function() { var enabled = true; function applyDarkMode() { if (!enabled) return; // Create style element if it doesn't exist var style = document.getElementById('universal-dark-mode-style'); if (!style) { style = document.createElement('style'); style.id = 'universal-dark-mode-style'; document.head.appendChild(style); } // Dark mode CSS - inverts colors but preserves images/video style.textContent = ' /* Invert everything except media */ html { filter: invert(1) hue-rotate(180deg) !important; background: #1a1a2e !important; } /* Restore images, videos, iframes, canvas */ img, video, iframe, canvas, svg, picture, [style*="background-image"] { filter: invert(1) hue-rotate(180deg) !important; } /* Preserve specific elements that should not be inverted */ .no-dark-mode, .no-dark-mode *, [data-theme="light"], [data-theme="light"], .ace_editor, .ace_editor *, .CodeMirror, .CodeMirror *, .monaco-editor, .monaco-editor *, .markdown-body pre, .markdown-body pre *, .highlight, .highlight *, pre code, pre code * { filter: none !important; } /* Fix common UI elements */ .modal, .popup, .dropdown-menu, .tooltip, .popover { filter: invert(1) hue-rotate(180deg) !important; background: #2d2d44 !important; border-color: #444 !important; } /* Scrollbars */ ::-webkit-scrollbar { background: #1a1a2e !important; } ::-webkit-scrollbar-thumb { background: #444 !important; } ::-webkit-scrollbar-thumb:hover { background: #555 !important; } /* Selection */ ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; } ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; } '; } function removeDarkMode() { var style = document.getElementById('universal-dark-mode-style'); if (style) style.remove(); } // Toggle with Alt+Shift+D document.addEventListener('keydown', function(e) { if (e.altKey && e.shiftKey && e.key === 'D') { e.preventDefault(); enabled = !enabled; if (enabled) { applyDarkMode(); console.log('[Universal Dark Mode] Enabled'); } else { removeDarkMode(); console.log('[Universal Dark Mode] Disabled'); } } }); // Apply on load applyDarkMode(); // Re-apply on dynamic content var observer = new MutationObserver(function(mutations) { if (enabled && !document.getElementById('universal-dark-mode-style')) { applyDarkMode(); } }); observer.observe(document.head, { childList: true }); console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle'); })(); } } catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); } })(); })(); JustinJLeopard (Justin Leopard) · GitHub
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JustinJLeopard/README.md

Justin Leopard

Software engineer building agent infrastructure: orchestration layers, safe local execution, typed memory, routing policy, evaluation, and the operator surfaces that make autonomous runs accountable.

I care about the unglamorous parts of agent systems: the queue, trace, sandbox, review gate, memory record, cost ledger, and handoff. If those pieces are weak, the model looks impressive right up until it repeats the same expensive mistake.

Current Focus

SurfaceWhat it proves
JustAiControl plane for multi-agent engineering work: intent, plan, execute, review, synthesize.
JustAi demoBrowser-visible mission control for task state, memory, trajectories, agents, cost, latency, and review quality.
safe-miniSafe-by-construction local execution for mini-swe-agent-style bash-action loops.
route-miniMulti-provider LLM routing with fallback, budget, latency targets, and decision logging.
memory-miniDurable namespaced memory with upsert-first semantics, soft delete, cleanup, and optional embeddings.
lab-miniRepeatable data-science lab loop: load, profile, analyze, claim, report.

Operating Thesis

Agents get useful when the system around them is engineered like production infrastructure.

  • Sandbox the boundary, not the capability. Give the agent room to solve the task inside a scoped worktree, scrubbed environment, guarded path, and recorded trajectory.
  • Trajectories beat vibes. Every action should leave a replayable trace that can teach the next run.
  • Routing is policy. Stronger models are an escalation decision, not a default reflex.
  • Memory has lifecycle. Durable context needs namespacing, upsert, retention, and cleanup rather than chat-history luck.
  • Evaluation should change behavior. A score that does not route, block, or teach the next run is mostly decoration.

Public Proof Path

Systems I Track Closely

I keep forks and notes around projects that shape the work:

The goal is not to collect logos; it is to keep the public graph close to the ideas I am building against.

Background

  • US Navy veteran, aircraft maintenance. The useful lesson was not ceremony; it was operational seriousness.
  • Full-stack engineer across Python, TypeScript, React, Node, SQL, local Linux/WSL, and browser-visible product surfaces.
  • Building Delegate & Orchestrate around practical agent systems that can be inspected, tested, and improved.

Contact

Popular repositories Loading

  1. JustAi JustAiPublic

    Control plane for multi-agent engineering work: intent, plan, execute, review, synthesize, with trajectories and routing policy.

    Python 1

  2. JustinJLeopard JustinJLeopardPublic

    GitHub profile README for Justin Leopard: agent infrastructure, safe execution, routing policy, typed memory, and evaluation.

  3. CarCar CarCarPublic archive

    JavaScript

  4. iRentals iRentalsPublic archive

    JavaScript

  5. Wardrobify WardrobifyPublic archive

    Python

  6. LeetCode-Problems-Solved LeetCode-Problems-SolvedPublic archive

    Collection of LeetCode questions to ace the coding interview! - Created using [LeetHub v2](https://github.com/arunbhardwaj/LeetHub-2.0)

    Python