{"slug":"mengto-optimize-web-animations","name":"optimize-web-animations","description":"Profile, audit, and optimize frontend page performance with emphasis on animation work, memory-leak risks, long-session slowdowns, CSS animations, canvas/WebGL requestAnimationFrame loops, marquees, skeletons, GSAP/Three/Matter effects, timers, listeners, and observers. Use when the user asks to make animations performant, pause offscreen animations, look for memory leaks, profile pages that slow the computer over time, fix janky scrolling, reduce CPU/GPU use, or repeat the \"only play in view\" optimization on React/Vite/Next/frontend pages using Codex Browser.","long_description":"---\nname: optimize-web-animations\ndescription: Profile, audit, and optimize frontend page performance with emphasis on animation work, memory-leak risks, long-session slowdowns, CSS animations, canvas/WebGL requestAnimationFrame loops, marquees, skeletons, GSAP/Three/Matter effects, timers, listeners, and observers. Use when the user asks to make animations performant, pause offscreen animations, look for memory leaks, profile pages that slow the computer over time, fix janky scrolling, reduce CPU/GPU use, or repeat the \"only play in view\" optimization on React/Vite/Next/frontend pages using Codex Browser.\n---\n\n# Optimize Web Animations\n\n## Core Rule\n\nMeasure the real page before editing. The goal is not to remove motion; it is to make offscreen work stop, visible motion resume correctly, and route/unmount cleanup release long-lived resources.\n\nUse Codex Browser when available, especially for localhost pages. Do not use Chrome unless the user explicitly asks for it.\n\n## Workflow\n\n1. Inspect repo context.\n   - Read `AGENTS.md` or local instructions.\n   - Run `git status --short` early.\n   - Find page components, animation hooks, CSS keyframes, `requestAnimationFrame`, `setInterval`, `setTimeout`, canvas/WebGL/physics components, media elements, GSAP timelines/tweens, and existing visibility utilities.\n   - Search effect cleanup for event listeners, observers, RAF loops, intervals, timers, external scripts, media streams, WebGL textures/materials/geometries/renderers, and async work that can complete after unmount.\n   - If the worktree is dirty, plan narrow staging from the start.\n\n2. Capture a baseline in the browser.\n   - Open the exact route the user named.\n   - Profile at top, mid-page, footer/lower content, and one mobile viewport when layout could differ.\n   - Count CSS animations by computed `animationName`, `animationPlayState`, and visibility. Include `::before` and `::after`.\n   - Inspect canvases/WebGL elements separately; CSS profiling does not prove RAF loops have stopped.\n   - Record which animation names are running offscreen and the DOM owners responsible.\n   - For memory/leak asks, also record element/canvas/image/iframe counts, exposed JS heap metrics when available, an idle sample after 10-30 seconds, and a short route-cycle sample. If heap APIs return `null` or the Browser sandbox blocks monkey-patching, say so and rely on stable observable counts plus source audit.\n   - Keep stress tests bounded. A Browser tab crash during profiling is evidence of overload, but do not over-attribute the cause unless reproduced by a minimal test.\n   - See `references/browser-profiling.md` for a reusable Codex Browser evaluator.\n\n3. Patch the smallest owner that controls the motion.\n   - Prefer an existing page reveal/visibility hook if the app has one.\n   - Otherwise add an `IntersectionObserver` that toggles a stable class such as `is-offscreen` on sections and animated child elements.\n   - Pause CSS animations with targeted rules:\n\n```css\nmain > section.is-offscreen .expensive-animation,\n.expensive-animation.is-offscreen {\n  animation-play-state: paused !important;\n}\n```\n\n   - For repeated cards or placeholders, observe the card shell and the animated descendants, not the whole document.\n   - For marquee/ticker tracks, pause the track when its section is offscreen.\n   - For skeleton loaders and pseudo-element glimmers, include `::before` and `::after` pause selectors where needed.\n   - For canvas/WebGL/physics loops, gate the RAF loop directly:\n     - Start when the canvas/container intersects.\n     - Cancel `requestAnimationFrame` when offscreen.\n     - Resume on re-entry.\n     - Disconnect observers and cancel frames on cleanup.\n     - Add a non-visual debug marker such as `data-animation-active` when it helps browser verification.\n   - Respect `prefers-reduced-motion` if the component already does, and avoid introducing React render loops for scroll/animation state.\n   - For leak hardening:\n     - Clear every timeout/interval created by the effect.\n     - Cancel RAF before unmount and before restarting a loop.\n     - Disconnect `IntersectionObserver`, `ResizeObserver`, `MutationObserver`, and custom subscriptions.\n     - Remove global/window/document listeners with the same handler reference.\n     - Dispose Three/WebGL textures, materials, geometries, renderers, and remove renderer DOM nodes.\n     - Kill GSAP tweens/timelines for DOM nodes and mutable objects such as shader uniforms.\n     - Stop media streams and pause detached video/audio sources.\n     - Guard async loaders with an `isDisposed` flag and dispose loaded resources if they resolve after unmount.\n     - In React cleanup, capture `ref.current` values inside the effect before returning cleanup if lint warns the ref may change.\n     - Cap physics or simulation frame deltas after visibility pauses so delayed frames do not run oversized updates.\n\n4. Verify behavior, not just builds.\n   - Reload the route and rerun the same top/mid/footer/mobile profiles.\n   - Target result: `offscreenRunningCount: 0` for the page sections under test.\n   - Confirm visible animations still run or resume when scrolled into view.\n   - Confirm RAF/canvas loops report inactive offscreen and active in view, or otherwise prove cancellation from source/runtime state.\n   - For leak audits, compare before/after route cycles and idle samples. DOM/canvas/image counts should return to the same baseline after repeated navigation, allowing for small expected async content changes.\n   - Exercise a normal page interaction such as search/filter/navigation so the observer does not break dynamic content.\n   - Check fresh-tab console warnings/errors.\n\n5. Run local checks.\n   - Use the repo's normal gates. For React/Vite apps this is often:\n\n```bash\ngit diff --check\nnpm run lint\nnpm run build\n```\n\n   - Mention known non-fatal warnings separately from failures.\n\n6. Commit narrowly when requested by repo/user instructions.\n   - If unrelated dirty changes exist, use an isolated index:\n\n```bash\nrm -f /tmp/<task>-index\nGIT_INDEX_FILE=/tmp/<task>-index git read-tree HEAD\n# Apply only the intended hunks to the temporary index.\nGIT_INDEX_FILE=/tmp/<task>-index git diff --cached --check\nGIT_INDEX_FILE=/tmp/<task>-index git commit -m \"Pause offscreen <page> animations\"\ngit restore --staged <files> 2>/dev/null || true\n```\n\n   - Never stage broad files from a dirty worktree unless every hunk belongs to the task.\n\n7. Report with evidence.\n   - Lead with findings: what was still running, what looked leak-prone, and what could not be measured.\n   - Separate source-audit risks from live Browser measurements.\n   - Include the exact sampled route(s), offscreen animation counts, DOM/canvas count stability, route-cycle result, and local checks.\n   - State limitations plainly, especially unavailable heap counters or blocked Browser instrumentation.\n\n## Good Fix Patterns\n\n- Section-level `is-offscreen` plus element-level `is-offscreen` for long sections where below-the-fold child animations can still run.\n- Shared visibility selector constants per route, such as `COURSES_PAGE_ANIMATION_VISIBILITY_SELECTOR`.\n- `IntersectionObserver` thresholds around `0.01` for animation gating.\n- Direct RAF loop control for WebGL/canvas effects; CSS `animation-play-state` cannot pause JavaScript render loops.\n- Frame delta caps for physics loops that resume after a paused or delayed frame.\n- Captured cleanup nodes for React refs used by GSAP/WebGL effects.\n- `isDisposed` guards for image/video/texture/data loaders that may resolve after unmount.\n- Short idle and route-cycle probes to catch accumulating DOM nodes, canvases, iframes, or unreleased media.\n\n## Avoid\n\n- Removing all animations to make the profile pass.\n- Pausing visible hero motion because an ancestor selector is too broad.\n- Assuming `animation-play-state` covers pseudo-elements or JavaScript RAF loops.\n- Trusting a single top-of-page measurement on long pages.\n- Treating unavailable heap counters as proof there is no memory leak.\n- Running unbounded stress loops in the Browser; use bounded cycles and record crashes without overstating causality.\n- Using screenshots alone as performance proof.\n- Letting unrelated local hunks ride along in the commit.\n","tagline":"Profile, audit, and optimize frontend page performance with emphasis on animation work, memory-leak risks, long-session slowdowns, CSS animations, canvas/WebGL requestAnimationFrame loops, marquees, skeletons, GSAP/Three/Matter effects, timers, listeners, and observers. Use when ","category":"security","tags":["agent-skill"],"author":"MengTo","verified":false,"attribution":{"status":"registry_indexed","statusLabel":"Registry indexed","shortLabel":"REGISTRY INDEXED","sourceLabel":"github candidate review","sourceDetail":"MengTo/Skills","creatorName":"MengTo","creatorUrl":"https://github.com/MengTo","sourceUrl":"https://github.com/MengTo/Skills/tree/main/agent-skills/codex/optimize-web-animations","indexedBy":"OpenAgentSkill community index","claimUrl":"https://www.openagentskill.com/skills/mengto-optimize-web-animations#claim-this-skill","claimCta":"Claim this skill","trustNote":"This listing was indexed from public sources and is not marked official until a maintainer claim is approved.","publicNote":"Attribution links to the public repository or creator profile. Creators can claim the listing to update ownership signals."},"stats":{"stars":5727,"forks":689,"verified_installs":0,"successful_runs":0,"total_outcomes":0,"rating":0,"review_count":0,"quality_score":49.71},"quality":{"score":85,"tier":"excellent","label":"Excellent","summary":"High-confidence pick with strong adoption and healthy maintenance signals.","signals":[{"label":"GitHub stars","value":"5.7K","tone":"positive"},{"label":"Freshness","value":"8d ago","tone":"positive"},{"label":"Install ready","value":"Yes","tone":"positive"},{"label":"License","value":"MIT","tone":"neutral"}],"warnings":[]},"trust":{"version":"trust-score-v5","score":72,"base_score":80,"outcome_confidence":0,"tier":"review","label":"Sandbox only","summary":"Useful candidate with missing or mixed trust signals. 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execution surface, external package install surface"},{"status":"pass","label":"Install availability","detail":"npx skills add MengTo/Skills --skill optimize-web-animations"},{"status":"pass","label":"Install command safety","detail":"standard package or runtime install path"},{"status":"warn","label":"Permission surface","detail":"shell or command execution, filesystem or document access"},{"status":"pass","label":"Repository evidence","detail":"https://github.com/MengTo/Skills/tree/main/agent-skills/codex/optimize-web-animations"},{"status":"pass","label":"Review status","detail":"AI review data available"},{"status":"info","label":"Agent Proven outcomes","detail":"No agent outcome data yet"},{"status":"warn","label":"Ownership","detail":"No approved owner claim yet"},{"status":"pass","label":"OpenAgentSkill usage","detail":"1 views, 0 install copies"},{"status":"info","label":"Agent outcomes","detail":"No agent outcome data yet"}],"strengths":["AI review approved","Install path is 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surface needs review: shell or command execution, filesystem or document access","Dependency/runtime risk: command execution surface, external package install surface","Permission surface: shell or command execution, filesystem or document access"]},"agent_proven":{"version":"agent-proven-v1","score":0,"tier":"unproven","label":"Needs first agent run","summary":"No agent outcome reports yet. Use Resolve, run one narrow sandbox task, then report the result.","metrics":{"totalOutcomes":0,"successfulOutcomes":0,"failedOutcomes":0,"installAttempts":0,"installSuccessRate":null,"successRate":null,"recentSuccessRate":null,"recentFailureRate":null,"riskBlocked":0,"setupRequired":0,"notRelevant":0,"avgOutputQuality":null,"avgTimeToUsefulMs":null,"productionOutcomes":0,"humanReviewRequired":0,"uniqueAgents":0,"lastOutcomeAt":null},"signals":[],"penalties":["No real agent outcome evidence yet"]},"outcome_stats":null,"safety":{"score":53,"level":"avoid_auto_install","label":"Avoid automatic install","safety_tier":{"tier":"experimental","label":"Experimental","badge":"EXPERIMENTAL","summary":"Sparse or mixed signals. 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Useful for discovery, but not for autonomous installation.","README/SKILL.md completeness: Public metadata needs stronger README/SKILL.md context","High-risk permission hints: Shell or command execution","Dependency or permission surface needs review","Permission surface may require sandboxing","Quality score needs review","Permission surface needs review: shell or command execution, filesystem or document access","Dependency/runtime risk: command execution surface, external package install surface","Permission surface: shell or command execution, filesystem or document access"],"validation_plan":["Inspect repository, README/SKILL.md, license, and recent commits before production use.","Install in an isolated workspace or sandbox with no production secrets available.","Run the smallest representative task and record files touched, commands run, network access, and outputs.","Compare the selected skill against at least one alternative when the eval status is review or failed.","Promote only after the agent reports a successful verification result and unresolved warnings are accepted."],"checks":[{"id":"task_fit","label":"Task fit","status":"pass","score":84,"required_for_auto_install":true,"detail":"Task wording matches this skill metadata.","evidence":["Evaluate optimize-web-animations before installing it in an agent workflow","security","Browser automation workflows; Claude Code teams; teams that value GitHub adoption signals"]},{"id":"install_path","label":"Install path","status":"pass","score":92,"required_for_auto_install":true,"detail":"Install handoff is available.","evidence":["npx skills add MengTo/Skills --skill optimize-web-animations"]},{"id":"install_safety","label":"Install command safety","status":"pass","score":92,"required_for_auto_install":true,"detail":"standard package or runtime install path","evidence":["npx skills add MengTo/Skills --skill optimize-web-animations"]},{"id":"trust_score","label":"Trust score","status":"warn","score":80,"required_for_auto_install":true,"detail":"Good trust signals with a few areas worth checking before rollout.","evidence":["Strong shortlist","5.7K GitHub stars","MIT"]},{"id":"audit_score","label":"Audit score","status":"warn","score":85,"required_for_auto_install":true,"detail":"Needs review","evidence":["Dependency or permission surface needs review"]},{"id":"agent_safety_gate","label":"Agent safety gate","status":"warn","score":53,"required_for_auto_install":true,"detail":"Sparse or mixed signals. Useful for discovery, but not for autonomous installation.","evidence":["Test manually in an isolated workspace and compare against safer alternatives.","High-risk permission hints: Shell or command execution"]},{"id":"readme_skillmd_completeness","label":"README/SKILL.md completeness","status":"warn","score":76,"required_for_auto_install":false,"detail":"Public metadata needs stronger README/SKILL.md context","evidence":["Usable metadata, review docs"]},{"id":"license_clarity","label":"License clarity","status":"pass","score":86,"required_for_auto_install":true,"detail":"MIT","evidence":["MIT"]},{"id":"recent_maintenance","label":"Recent maintenance","status":"pass","score":100,"required_for_auto_install":false,"detail":"8d since push","evidence":["8d since push"]},{"id":"permission_surface","label":"Permission surface","status":"fail","score":48,"required_for_auto_install":true,"detail":"shell or command execution, filesystem or document access","evidence":["Shell or command execution: high","Browser automation: medium","Network access: medium"]},{"id":"alternatives","label":"Alternatives available","status":"info","score":55,"required_for_auto_install":false,"detail":"No close alternatives were found in the current shortlist.","evidence":[]}],"endpoints":{"web":"https://www.openagentskill.com/skills/mengto-optimize-web-animations/evals","api":"/api/agent/evals?slug=mengto-optimize-web-animations","text":"/api/agent/evals?slug=mengto-optimize-web-animations&format=text"}},"agent_readable_metadata":{"version":"openagentskill-agent-metadata-v2","skill":{"slug":"mengto-optimize-web-animations","name":"optimize-web-animations","description":"Profile, audit, and optimize frontend page performance with emphasis on animation work, memory-leak risks, long-session slowdowns, CSS animations, canvas/WebGL requestAnimationFrame loops, marquees, skeletons, GSAP/Three/Matter effects, timers, listeners, and observers. Use when the user asks to make animations performant, pause offscreen animations, look for memory leaks, profile pages that slow the computer over time, fix janky scrolling, reduce CPU/GPU use, or repeat the \"only play in view\" optimization on React/Vite/Next/frontend pages using Codex Browser.","category":"security","url":"https://www.openagentskill.com/skills/mengto-optimize-web-animations","repository":"https://github.com/MengTo/Skills/tree/main/agent-skills/codex/optimize-web-animations","github_repo":"MengTo/Skills"},"suited_tasks":["Browser automation workflows","Claude Code teams","teams that value GitHub adoption signals","Navigate pages","Click and type safely","Check visual and DOM state","Search sources","Extract claims"],"suited_agents":["Codex","Claude Code","Cursor","OpenAgentSkill CLI","OpenAI Agents","Browser agents","CLI"],"install":{"command":"npx skills add MengTo/Skills --skill optimize-web-animations","ready":true,"targets":[{"id":"openagentskill-cli","label":"CLI","kind":"command","value":"npx --yes https://github.com/Leon-Drq/openagentskill/releases/download/cli-v0.3.0/openagentskill-0.3.0.tgz add mengto-optimize-web-animations"},{"id":"codex","label":"Codex","kind":"agent-prompt","value":"Install the \"optimize-web-animations\" agent skill from https://github.com/MengTo/Skills/tree/main/agent-skills/codex/optimize-web-animations. Read its SKILL.md or equivalent instructions first, install only the files needed for this workspace, and summarize any required setup before using it. Skill purpose: Profile, audit, and optimize frontend page performance with emphasis on animation work, memory-leak risks, long-session slowdowns, CSS animations, canvas/WebGL requestAnimationFrame loops, marquees, skeletons, GSAP/Three/Matter effects, timers, listeners, and observers. Use when the user asks to make animations performant, pause offscreen animations, look for memory leaks, profile pages that slow the computer over time, fix janky scrolling, reduce CPU/GPU use, or repeat the \"only play in view\" optimization on React/Vite/Next/frontend pages using Codex Browser. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"mengto-optimize-web-animations\",\"task\":\"Install optimize-web-animations\",\"agent\":\"codex\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes."},{"id":"claude-code","label":"Claude Code","kind":"agent-prompt","value":"Add \"optimize-web-animations\" as a Claude Code skill from https://github.com/MengTo/Skills/tree/main/agent-skills/codex/optimize-web-animations. Inspect the skill instructions, place the reusable skill files in the appropriate local skills location for this project, and report the activation steps. Skill purpose: Profile, audit, and optimize frontend page performance with emphasis on animation work, memory-leak risks, long-session slowdowns, CSS animations, canvas/WebGL requestAnimationFrame loops, marquees, skeletons, GSAP/Three/Matter effects, timers, listeners, and observers. Use when the user asks to make animations performant, pause offscreen animations, look for memory leaks, profile pages that slow the computer over time, fix janky scrolling, reduce CPU/GPU use, or repeat the \"only play in view\" optimization on React/Vite/Next/frontend pages using Codex Browser. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"mengto-optimize-web-animations\",\"task\":\"Install optimize-web-animations\",\"agent\":\"claude-code\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes."},{"id":"cursor","label":"Cursor","kind":"agent-prompt","value":"Turn \"optimize-web-animations\" from https://github.com/MengTo/Skills/tree/main/agent-skills/codex/optimize-web-animations into a reusable Cursor project rule or agent instruction. Preserve the core workflow, adapt paths to this repo, and keep the rule scoped to tasks where it is relevant. Skill purpose: Profile, audit, and optimize frontend page performance with emphasis on animation work, memory-leak risks, long-session slowdowns, CSS animations, canvas/WebGL requestAnimationFrame loops, marquees, skeletons, GSAP/Three/Matter effects, timers, listeners, and observers. Use when the user asks to make animations performant, pause offscreen animations, look for memory leaks, profile pages that slow the computer over time, fix janky scrolling, reduce CPU/GPU use, or repeat the \"only play in view\" optimization on React/Vite/Next/frontend pages using Codex Browser. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"mengto-optimize-web-animations\",\"task\":\"Install optimize-web-animations\",\"agent\":\"cursor\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes."}],"handoff_url":"https://www.openagentskill.com/api/skills/mengto-optimize-web-animations/install","manifest_url":"https://www.openagentskill.com/api/registry/manifest/mengto-optimize-web-animations"},"trust":{"score":80,"label":"Strong shortlist","version":"trust-score-v4","install_policy":"human_review_before_install","evidence":{"stars":"5.7K GitHub stars","repoActivity":"5.7K stars, 689 forks","lastPushed":"8d since push","license":"MIT","repository":"https://github.com/MengTo/Skills/tree/main/agent-skills/codex/optimize-web-animations","install":"npx skills add MengTo/Skills --skill optimize-web-animations","installSafety":"standard package or runtime install path","permissionSurface":"shell or command execution, filesystem or document access","documentation":"Usable metadata, review docs","agentOutcomes":"No agent outcome data yet"},"outcome_evidence":{"total":0,"successes":0,"failures":0,"not_relevant":0,"success_rate":null,"recent_success_rate":null,"recent_failure_rate":null,"install_attempts":0,"install_success_rate":null,"risk_blocked":0,"setup_required":0,"avg_output_quality":null,"production_outcomes":0,"last_outcome_at":null,"label":"No agent outcome data yet"},"auto_install":{"allowed":false,"sandbox_required":true,"reason":"Human review or sandbox validation is required before automatic installation."},"best_for":["security","agent-skill"],"known_risks":["Quality score needs review","Permission surface needs review: shell or command execution, filesystem or document access","Dependency/runtime risk: command execution surface, external package install surface","Permission surface: shell or command execution, filesystem or document access"]},"agent_proven":{"version":"agent-proven-v1","score":0,"tier":"unproven","label":"Needs first agent run","summary":"No agent outcome reports yet. Use Resolve, run one narrow sandbox task, then report the result.","metrics":{"totalOutcomes":0,"successfulOutcomes":0,"failedOutcomes":0,"installAttempts":0,"installSuccessRate":null,"successRate":null,"recentSuccessRate":null,"recentFailureRate":null,"riskBlocked":0,"setupRequired":0,"notRelevant":0,"avgOutputQuality":null,"avgTimeToUsefulMs":null,"productionOutcomes":0,"humanReviewRequired":0,"uniqueAgents":0,"lastOutcomeAt":null},"signals":[],"penalties":["No real agent outcome evidence yet"]},"audit":{"score":85,"risk_level":"needs_review","risk_label":"Needs review","warnings":["Dependency or permission surface needs review","Permission surface may require sandboxing","Quality score needs review","Permission surface needs review: shell or command execution, filesystem or document access","Dependency/runtime risk: command execution surface, external package install surface","Permission surface: shell or command execution, filesystem or document access"]},"safety_gate":{"tier":"experimental","label":"Experimental","auto_install_policy":"review","auto_install_allowed":false,"human_review_required":true,"blocked":false,"recommended_action":"Test manually in an isolated workspace and compare against safer alternatives."},"quality":{"score":85,"label":"Excellent"},"supply":{"track":"Coding and developer agents","scenario":"Testing and QA","maintenance":"8d since push","risk":"Needs review"},"alternative_skills":[],"do_not_use_when":["teams that need a vendor-supported SLA","high-compliance environments without internal security review","No major risk signals from current metadata","High-risk permission hints: Shell or command execution","Dependency or permission surface needs review","Permission surface may require sandboxing","Quality score needs review","Permission surface needs review: shell or command execution, filesystem or document access"],"agent_contract":{"task_input":"Use optimize-web-animations in an agent workflow","recommended_action":"Test manually in an isolated workspace and compare against safer alternatives.","install_policy":"review","minimum_review_before_use":["Trust: 80/100 Strong shortlist","Audit: 85/100 Needs review","Safety: 53/100 Avoid automatic install","Review repository, license, install command, and permission surface before production use."],"expected_agent_output":{"selected_skill":"mengto-optimize-web-animations (optimize-web-animations)","install_command":"npx skills add MengTo/Skills --skill optimize-web-animations","risk_summary":"Needs review; Experimental; Review before production","verification_result":"Report the smallest successful task, files touched, warnings, and any missing setup."}},"outcome_feedback":{"endpoint":"https://www.openagentskill.com/api/agent/outcome","method":"POST","requires_resolve_event_id":true,"event_id_source":"Use install_receipt.outcome_feedback.event_id or feedback.event_id returned by /api/agent/resolve for the current task.","expected_outcomes":["success","failed","not_relevant","blocked_by_risk","setup_required"],"payload_template":{"event_id":"<install_receipt.outcome_feedback.event_id or feedback.event_id from /api/agent/resolve>","skill_slug":"mengto-optimize-web-animations","task":"Use optimize-web-animations in an agent workflow","agent":"codex","outcome":"success","install_used":true,"risk_blocked":false,"setup_required":false,"task_success":true,"output_quality":4,"error_type":null,"human_review_required":false,"workspace":"sandbox","time_to_useful_ms":120000,"notes":"Report the smallest successful task, setup friction, files touched, and risk notes."}},"endpoints":{"web":"https://www.openagentskill.com/skills/mengto-optimize-web-animations","api":"https://www.openagentskill.com/api/agent/skills/mengto-optimize-web-animations","audit":"https://www.openagentskill.com/skills/mengto-optimize-web-animations/audit","eval":"https://www.openagentskill.com/api/agent/evals?slug=mengto-optimize-web-animations&task=Use%20optimize-web-animations%20in%20an%20agent%20workflow&max_risk=medium","resolve":"https://www.openagentskill.com/api/agent/resolve?task=Use%20optimize-web-animations%20in%20an%20agent%20workflow&agent=codex&max_risk=medium","receipt":"https://www.openagentskill.com/api/agent/receipt?task=Use%20optimize-web-animations%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text","install":"https://www.openagentskill.com/api/skills/mengto-optimize-web-animations/install","manifest":"https://www.openagentskill.com/api/registry/manifest/mengto-optimize-web-animations"}},"machine_metadata":{"version":"openagentskill-agent-metadata-v2","skill":{"slug":"mengto-optimize-web-animations","name":"optimize-web-animations","description":"Profile, audit, and optimize frontend page performance with emphasis on animation work, memory-leak risks, long-session slowdowns, CSS animations, canvas/WebGL requestAnimationFrame loops, marquees, skeletons, GSAP/Three/Matter effects, timers, listeners, and observers. Use when the user asks to make animations performant, pause offscreen animations, look for memory leaks, profile pages that slow the computer over time, fix janky scrolling, reduce CPU/GPU use, or repeat the \"only play in view\" optimization on React/Vite/Next/frontend pages using Codex Browser.","category":"security","url":"https://www.openagentskill.com/skills/mengto-optimize-web-animations","repository":"https://github.com/MengTo/Skills/tree/main/agent-skills/codex/optimize-web-animations","github_repo":"MengTo/Skills"},"suited_tasks":["Browser automation workflows","Claude Code teams","teams that value GitHub adoption signals","Navigate pages","Click and type safely","Check visual and DOM state","Search sources","Extract claims"],"suited_agents":["Codex","Claude Code","Cursor","OpenAgentSkill CLI","OpenAI Agents","Browser agents","CLI"],"install":{"command":"npx skills add MengTo/Skills --skill optimize-web-animations","ready":true,"targets":[{"id":"openagentskill-cli","label":"CLI","kind":"command","value":"npx --yes https://github.com/Leon-Drq/openagentskill/releases/download/cli-v0.3.0/openagentskill-0.3.0.tgz add mengto-optimize-web-animations"},{"id":"codex","label":"Codex","kind":"agent-prompt","value":"Install the \"optimize-web-animations\" agent skill from https://github.com/MengTo/Skills/tree/main/agent-skills/codex/optimize-web-animations. Read its SKILL.md or equivalent instructions first, install only the files needed for this workspace, and summarize any required setup before using it. Skill purpose: Profile, audit, and optimize frontend page performance with emphasis on animation work, memory-leak risks, long-session slowdowns, CSS animations, canvas/WebGL requestAnimationFrame loops, marquees, skeletons, GSAP/Three/Matter effects, timers, listeners, and observers. Use when the user asks to make animations performant, pause offscreen animations, look for memory leaks, profile pages that slow the computer over time, fix janky scrolling, reduce CPU/GPU use, or repeat the \"only play in view\" optimization on React/Vite/Next/frontend pages using Codex Browser. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"mengto-optimize-web-animations\",\"task\":\"Install optimize-web-animations\",\"agent\":\"codex\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes."},{"id":"claude-code","label":"Claude Code","kind":"agent-prompt","value":"Add \"optimize-web-animations\" as a Claude Code skill from https://github.com/MengTo/Skills/tree/main/agent-skills/codex/optimize-web-animations. Inspect the skill instructions, place the reusable skill files in the appropriate local skills location for this project, and report the activation steps. Skill purpose: Profile, audit, and optimize frontend page performance with emphasis on animation work, memory-leak risks, long-session slowdowns, CSS animations, canvas/WebGL requestAnimationFrame loops, marquees, skeletons, GSAP/Three/Matter effects, timers, listeners, and observers. Use when the user asks to make animations performant, pause offscreen animations, look for memory leaks, profile pages that slow the computer over time, fix janky scrolling, reduce CPU/GPU use, or repeat the \"only play in view\" optimization on React/Vite/Next/frontend pages using Codex Browser. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"mengto-optimize-web-animations\",\"task\":\"Install optimize-web-animations\",\"agent\":\"claude-code\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes."},{"id":"cursor","label":"Cursor","kind":"agent-prompt","value":"Turn \"optimize-web-animations\" from https://github.com/MengTo/Skills/tree/main/agent-skills/codex/optimize-web-animations into a reusable Cursor project rule or agent instruction. Preserve the core workflow, adapt paths to this repo, and keep the rule scoped to tasks where it is relevant. Skill purpose: Profile, audit, and optimize frontend page performance with emphasis on animation work, memory-leak risks, long-session slowdowns, CSS animations, canvas/WebGL requestAnimationFrame loops, marquees, skeletons, GSAP/Three/Matter effects, timers, listeners, and observers. Use when the user asks to make animations performant, pause offscreen animations, look for memory leaks, profile pages that slow the computer over time, fix janky scrolling, reduce CPU/GPU use, or repeat the \"only play in view\" optimization on React/Vite/Next/frontend pages using Codex Browser. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"mengto-optimize-web-animations\",\"task\":\"Install optimize-web-animations\",\"agent\":\"cursor\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes."}],"handoff_url":"https://www.openagentskill.com/api/skills/mengto-optimize-web-animations/install","manifest_url":"https://www.openagentskill.com/api/registry/manifest/mengto-optimize-web-animations"},"trust":{"score":80,"label":"Strong shortlist","version":"trust-score-v4","install_policy":"human_review_before_install","evidence":{"stars":"5.7K GitHub stars","repoActivity":"5.7K stars, 689 forks","lastPushed":"8d since push","license":"MIT","repository":"https://github.com/MengTo/Skills/tree/main/agent-skills/codex/optimize-web-animations","install":"npx skills add MengTo/Skills --skill optimize-web-animations","installSafety":"standard package or runtime install path","permissionSurface":"shell or command execution, filesystem or document access","documentation":"Usable metadata, review docs","agentOutcomes":"No agent outcome data yet"},"outcome_evidence":{"total":0,"successes":0,"failures":0,"not_relevant":0,"success_rate":null,"recent_success_rate":null,"recent_failure_rate":null,"install_attempts":0,"install_success_rate":null,"risk_blocked":0,"setup_required":0,"avg_output_quality":null,"production_outcomes":0,"last_outcome_at":null,"label":"No agent outcome data yet"},"auto_install":{"allowed":false,"sandbox_required":true,"reason":"Human review or sandbox validation is required before automatic installation."},"best_for":["security","agent-skill"],"known_risks":["Quality score needs review","Permission surface needs review: shell or command execution, filesystem or document access","Dependency/runtime risk: command execution surface, external package install surface","Permission surface: shell or command execution, filesystem or document access"]},"agent_proven":{"version":"agent-proven-v1","score":0,"tier":"unproven","label":"Needs first agent run","summary":"No agent outcome reports yet. Use Resolve, run one narrow sandbox task, then report the result.","metrics":{"totalOutcomes":0,"successfulOutcomes":0,"failedOutcomes":0,"installAttempts":0,"installSuccessRate":null,"successRate":null,"recentSuccessRate":null,"recentFailureRate":null,"riskBlocked":0,"setupRequired":0,"notRelevant":0,"avgOutputQuality":null,"avgTimeToUsefulMs":null,"productionOutcomes":0,"humanReviewRequired":0,"uniqueAgents":0,"lastOutcomeAt":null},"signals":[],"penalties":["No real agent outcome evidence yet"]},"audit":{"score":85,"risk_level":"needs_review","risk_label":"Needs review","warnings":["Dependency or permission surface needs review","Permission surface may require sandboxing","Quality score needs review","Permission surface needs review: shell or command execution, filesystem or document access","Dependency/runtime risk: command execution surface, external package install surface","Permission surface: shell or command execution, filesystem or document access"]},"safety_gate":{"tier":"experimental","label":"Experimental","auto_install_policy":"review","auto_install_allowed":false,"human_review_required":true,"blocked":false,"recommended_action":"Test manually in an isolated workspace and compare against safer alternatives."},"quality":{"score":85,"label":"Excellent"},"supply":{"track":"Coding and developer agents","scenario":"Testing and QA","maintenance":"8d since push","risk":"Needs review"},"alternative_skills":[],"do_not_use_when":["teams that need a vendor-supported SLA","high-compliance environments without internal security review","No major risk signals from current metadata","High-risk permission hints: Shell or command execution","Dependency or permission surface needs review","Permission surface may require sandboxing","Quality score needs review","Permission surface needs review: shell or command execution, filesystem or document access"],"agent_contract":{"task_input":"Use optimize-web-animations in an agent workflow","recommended_action":"Test manually in an isolated workspace and compare against safer alternatives.","install_policy":"review","minimum_review_before_use":["Trust: 80/100 Strong shortlist","Audit: 85/100 Needs review","Safety: 53/100 Avoid automatic install","Review repository, license, install command, and permission surface before production use."],"expected_agent_output":{"selected_skill":"mengto-optimize-web-animations (optimize-web-animations)","install_command":"npx skills add MengTo/Skills --skill optimize-web-animations","risk_summary":"Needs review; Experimental; Review before production","verification_result":"Report the smallest successful task, files touched, warnings, and any missing setup."}},"outcome_feedback":{"endpoint":"https://www.openagentskill.com/api/agent/outcome","method":"POST","requires_resolve_event_id":true,"event_id_source":"Use install_receipt.outcome_feedback.event_id or feedback.event_id returned by /api/agent/resolve for the current task.","expected_outcomes":["success","failed","not_relevant","blocked_by_risk","setup_required"],"payload_template":{"event_id":"<install_receipt.outcome_feedback.event_id or feedback.event_id from /api/agent/resolve>","skill_slug":"mengto-optimize-web-animations","task":"Use optimize-web-animations in an agent workflow","agent":"codex","outcome":"success","install_used":true,"risk_blocked":false,"setup_required":false,"task_success":true,"output_quality":4,"error_type":null,"human_review_required":false,"workspace":"sandbox","time_to_useful_ms":120000,"notes":"Report the smallest successful task, setup friction, files touched, and risk notes."}},"endpoints":{"web":"https://www.openagentskill.com/skills/mengto-optimize-web-animations","api":"https://www.openagentskill.com/api/agent/skills/mengto-optimize-web-animations","audit":"https://www.openagentskill.com/skills/mengto-optimize-web-animations/audit","eval":"https://www.openagentskill.com/api/agent/evals?slug=mengto-optimize-web-animations&task=Use%20optimize-web-animations%20in%20an%20agent%20workflow&max_risk=medium","resolve":"https://www.openagentskill.com/api/agent/resolve?task=Use%20optimize-web-animations%20in%20an%20agent%20workflow&agent=codex&max_risk=medium","receipt":"https://www.openagentskill.com/api/agent/receipt?task=Use%20optimize-web-animations%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text","install":"https://www.openagentskill.com/api/skills/mengto-optimize-web-animations/install","manifest":"https://www.openagentskill.com/api/registry/manifest/mengto-optimize-web-animations"}},"supply_profile":{"track":{"slug":"coding","label":"Coding and developer agents","shortLabel":"Coding","description":"Code review, repo analysis, testing, CI, GitHub, DevOps, and developer workflow skills."},"scenario":{"label":"Testing and QA","description":"I need my agent to test a web app, reproduce bugs, and verify fixes.","useCases":[{"slug":"browser-automation","title":"Browser automation"},{"slug":"research-agents","title":"Research agents"},{"slug":"testing-qa","title":"Testing and QA"}]},"applicableAgents":["Claude Code","OpenAI Agents","Browser agents","CLI","Codex"],"install":{"ready":true,"command":"npx skills add MengTo/Skills --skill optimize-web-animations","primaryTarget":"CLI","targetCount":4},"githubQuality":{"stars":5727,"starsLabel":"5.7K","forks":689,"license":"MIT","qualityScore":85,"trustScore":80,"auditScore":85},"maintenance":{"status":"fresh","label":"8d since push","daysSincePush":8,"lastPushedAt":"2026-08-28T23:38:17+00:00"},"risk":{"level":"needs_review","label":"Needs review","requiresReview":true,"notes":["Dependency or permission surface needs review","Permission surface may require sandboxing","Quality score needs review","Permission surface needs review: shell or command execution, filesystem or document access","Dependency/runtime risk: command execution surface, external package install surface"]},"coverageTags":["Coding","Testing and QA","security","agent-skill"]},"audit":{"audit_score":85,"risk_level":"needs_review","risk_label":"Needs review","quality_score":85,"trust_score":80,"maintenance_score":100,"security_score":80,"install_score":92,"warnings":["Dependency or permission surface needs review","Permission surface may require sandboxing","Quality score needs review","Permission surface needs review: shell or command execution, filesystem or document access","Dependency/runtime risk: command execution surface, external package install surface","Permission surface: shell or command execution, filesystem or document access"]},"quality_signals":{"model":"v2","star_score":26.31,"usage_score":0,"review_score":5.4,"metadata_score":3,"freshness_score":15},"platforms":["Claude Code","OpenAI Agents","Browser agents"],"use_cases":[{"slug":"browser-automation","title":"Browser automation","url":"https://www.openagentskill.com/use-cases/browser-automation"},{"slug":"research-agents","title":"Research agents","url":"https://www.openagentskill.com/use-cases/research-agents"},{"slug":"testing-qa","title":"Testing and QA","url":"https://www.openagentskill.com/use-cases/testing-qa"},{"slug":"multimodal-media","title":"Multimodal media","url":"https://www.openagentskill.com/use-cases/multimodal-media"}],"stacks":[{"slug":"browser-qa-agent","title":"Browser QA agent","url":"https://www.openagentskill.com/collections/browser-qa-agent"},{"slug":"research-report-agent","title":"Research report agent","url":"https://www.openagentskill.com/collections/research-report-agent"},{"slug":"content-growth-agent","title":"Content growth agent","url":"https://www.openagentskill.com/collections/content-growth-agent"}],"install":"npx skills add MengTo/Skills --skill optimize-web-animations","install_targets":[{"id":"openagentskill-cli","label":"CLI","title":"OpenAgentSkill CLI","kind":"command","value":"npx --yes https://github.com/Leon-Drq/openagentskill/releases/download/cli-v0.3.0/openagentskill-0.3.0.tgz add mengto-optimize-web-animations","description":"Resolve policy, run the source installer safely, and report a verified install receipt.","copyLabel":"Copy command"},{"id":"codex","label":"Codex","title":"Codex install prompt","kind":"agent-prompt","value":"Install the \"optimize-web-animations\" agent skill from https://github.com/MengTo/Skills/tree/main/agent-skills/codex/optimize-web-animations. Read its SKILL.md or equivalent instructions first, install only the files needed for this workspace, and summarize any required setup before using it. Skill purpose: Profile, audit, and optimize frontend page performance with emphasis on animation work, memory-leak risks, long-session slowdowns, CSS animations, canvas/WebGL requestAnimationFrame loops, marquees, skeletons, GSAP/Three/Matter effects, timers, listeners, and observers. Use when the user asks to make animations performant, pause offscreen animations, look for memory leaks, profile pages that slow the computer over time, fix janky scrolling, reduce CPU/GPU use, or repeat the \"only play in view\" optimization on React/Vite/Next/frontend pages using Codex Browser. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"mengto-optimize-web-animations\",\"task\":\"Install optimize-web-animations\",\"agent\":\"codex\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Give Codex a repo-aware install prompt when the skill is not available through a local CLI.","copyLabel":"Copy prompt"},{"id":"claude-code","label":"Claude Code","title":"Claude Code skill prompt","kind":"agent-prompt","value":"Add \"optimize-web-animations\" as a Claude Code skill from https://github.com/MengTo/Skills/tree/main/agent-skills/codex/optimize-web-animations. Inspect the skill instructions, place the reusable skill files in the appropriate local skills location for this project, and report the activation steps. Skill purpose: Profile, audit, and optimize frontend page performance with emphasis on animation work, memory-leak risks, long-session slowdowns, CSS animations, canvas/WebGL requestAnimationFrame loops, marquees, skeletons, GSAP/Three/Matter effects, timers, listeners, and observers. Use when the user asks to make animations performant, pause offscreen animations, look for memory leaks, profile pages that slow the computer over time, fix janky scrolling, reduce CPU/GPU use, or repeat the \"only play in view\" optimization on React/Vite/Next/frontend pages using Codex Browser. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"mengto-optimize-web-animations\",\"task\":\"Install optimize-web-animations\",\"agent\":\"claude-code\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Use this prompt to ask Claude Code to add the skill and explain the local activation steps.","copyLabel":"Copy prompt"},{"id":"cursor","label":"Cursor","title":"Cursor rule prompt","kind":"agent-prompt","value":"Turn \"optimize-web-animations\" from https://github.com/MengTo/Skills/tree/main/agent-skills/codex/optimize-web-animations into a reusable Cursor project rule or agent instruction. Preserve the core workflow, adapt paths to this repo, and keep the rule scoped to tasks where it is relevant. Skill purpose: Profile, audit, and optimize frontend page performance with emphasis on animation work, memory-leak risks, long-session slowdowns, CSS animations, canvas/WebGL requestAnimationFrame loops, marquees, skeletons, GSAP/Three/Matter effects, timers, listeners, and observers. Use when the user asks to make animations performant, pause offscreen animations, look for memory leaks, profile pages that slow the computer over time, fix janky scrolling, reduce CPU/GPU use, or repeat the \"only play in view\" optimization on React/Vite/Next/frontend pages using Codex Browser. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"mengto-optimize-web-animations\",\"task\":\"Install optimize-web-animations\",\"agent\":\"cursor\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Use this when installing as Cursor project rules or reusable agent instructions.","copyLabel":"Copy prompt"}],"repository":"https://github.com/MengTo/Skills/tree/main/agent-skills/codex/optimize-web-animations","github_repo":"MengTo/Skills","version":"1.0.0","license":"MIT","urls":{"web":"https://www.openagentskill.com/skills/mengto-optimize-web-animations","repository":"https://github.com/MengTo/Skills/tree/main/agent-skills/codex/optimize-web-animations","api":"/api/agent/skills/mengto-optimize-web-animations","install_api":"/api/skills/mengto-optimize-web-animations/install"},"meta":{"created_at":"2026-09-02T12:02:03.123202+00:00","updated_at":"2026-09-02T12:02:03.402142+00:00","agent_friendly":true}}