{"passport":{"unfragile":{"@version":"1.0","version":"2026-05","artifact":{"id":"tool_chord-variations","slug":"chord-variations","name":"Chord Variations","type":"webapp","url":"https://chord-alt.vercel.app","page_url":"https://unfragile.ai/chord-variations","categories":["voice-audio"],"tags":[],"pricing":{"model":"free","free":true,"starting_price":null},"status":"active","verified":false},"capabilities":[{"id":"tool_chord-variations__cap_0","uri":"capability://planning.reasoning.interactive.chord.progression.builder.with.chromatic.root.and.quality.selection","name":"interactive chord progression builder with chromatic root and quality selection","description":"Provides a client-side UI for constructing chord progressions by selecting from 12 chromatic root notes (C through B) and 20 distinct chord qualities (triads, 7th variants, extended 9th/11th/13th chords, and suspended variations). Users add chords sequentially to a progression list (max 5 chords) with individual removal controls, creating a structured input representation that is then sent to the backend for AI-based variation generation. The builder maintains client-side state of the current progression and validates chord count constraints before enabling generation.","intents":["I want to quickly specify a chord progression without typing notation or MIDI entry","I need to explore what happens when I swap chord qualities while keeping roots fixed","I want to build progressions up to 5 chords and see AI-generated alternatives"],"best_for":["hobbyist songwriters and music students with intermediate music theory knowledge","musicians seeking quick harmonic inspiration without DAW integration","composers experimenting with chord substitutions during ideation phase"],"limitations":["Hard maximum of 5 chords per progression limits input complexity; many songs exceed this constraint","No support for chord inversions, voicings, or bass notes — only root position implied","No constraint specification (e.g., 'stay in C major scale', 'avoid parallel fifths') — all chord qualities treated equally","No progression templates, presets, or genre-specific starting points provided","No undo/redo functionality visible; users must manually remove and re-add chords to modify"],"requires":["Web browser with JavaScript enabled","Basic music theory knowledge (understanding chord nomenclature like 'Minor-major 7th', 'Half-diminished 7th')","No authentication or signup required"],"input_types":["user selection from dropdown/button UI (chord root: 12 options)","user selection from dropdown/button UI (chord quality: 20 options)","user action (add chord to progression, remove chord from progression, generate variations)"],"output_types":["client-side progression state (array of chord objects: {root, quality})","HTTP request payload sent to backend for generation"],"categories":["planning-reasoning","music-composition"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"tool_chord-variations__cap_1","uri":"capability://planning.reasoning.ai.powered.chord.progression.variation.generation.with.latency.based.async.processing","name":"ai-powered chord progression variation generation with latency-based async processing","description":"Accepts a user-constructed chord progression (1-5 chords) and sends it to a backend API endpoint (model identity unknown) for AI-based variation generation. The system processes the request asynchronously with stated latency of approximately 1 minute per generation request, displaying a loading state and providing a 'Stop' button to cancel in-flight requests. The backend applies unknown variation strategies (potentially harmonic substitution, reharmonization, or probabilistic sampling) to generate alternative progressions, returning results to the client for display.","intents":["I want to generate fresh chord progression ideas based on a seed progression I've built","I need to break writer's block by seeing AI-suggested harmonic alternatives","I want to explore what variations an AI model considers musically coherent given my input"],"best_for":["songwriters experiencing harmonic inspiration fatigue","music students learning harmonic substitution and reharmonization techniques","composers prototyping multiple harmonic directions for a single melodic idea"],"limitations":["Generation latency of ~1 minute per request severely limits iteration speed; unsuitable for real-time composition workflows","No documented variation strategy or music theory constraints applied; unclear whether AI respects key, scale mode, or voice-leading rules","Backend error state visible on page load ('There was an error generating the chord progression'), suggesting reliability issues or API dependency problems","No batch generation capability; users must wait 1 minute between each variation request","No explanation or harmonic analysis provided for why specific variations were generated — purely generative without educational context","Unknown model capacity; no information on context window size, training data, or harmonic knowledge base"],"requires":["Active internet connection to backend API","Backend service availability (Vercel serverless functions or equivalent)","Unknown: API key or authentication mechanism (not visible in UI)","Tolerance for ~60 second generation latency per request"],"input_types":["structured chord progression object: array of {root: string (C-B), quality: string (Major, Minor, Dominant 7th, etc.)}","progression length: 1-5 chords"],"output_types":["chord progression variation(s) — format unknown (text notation, MIDI, visual representation, or audio playback capability not documented)","HTTP response from backend (structure unknown)"],"categories":["planning-reasoning","text-generation-language"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"tool_chord-variations__cap_2","uri":"capability://text.generation.language.chord.progression.output.rendering.with.unknown.format.and.playback.capability","name":"chord progression output rendering with unknown format and playback capability","description":"Receives AI-generated chord progression variation(s) from the backend and renders them to the user interface for consumption. The output format is not documented in provided content — could be text notation (Roman numerals, lead sheet symbols), visual representation (chord diagrams, staff notation), MIDI data, or audio playback. Users can presumably view, interact with, or export generated variations, but the specific rendering mechanism, supported formats, and downstream integration points are unknown.","intents":["I want to see the AI-generated chord variations in a format I can understand and evaluate","I need to hear the generated progressions to assess their musical quality before using them","I want to export or copy generated progressions into my DAW or notation software"],"best_for":["musicians who need visual feedback on harmonic choices","composers evaluating sonic quality of variations before committing to a progression","users integrating generated progressions into external music production workflows"],"limitations":["Output format completely undocumented; cannot verify if variations are presented as text, visual, or audio","No audio playback capability documented in UI or editorial summary — users must manually input progressions into DAW to evaluate sonically","No export functionality visible; unclear if users can download/copy generated progressions for use in external tools","No batch output or comparison view; users likely see one variation at a time, requiring sequential requests for alternatives","No harmonic analysis or explanation of why specific variations were chosen — purely presentational without educational context"],"requires":["Successful backend generation (see previous capability)","Browser capable of rendering output format (text, SVG, canvas, or audio element)","Unknown: DAW or notation software if exporting is intended"],"input_types":["backend API response containing generated chord progression(s) — structure unknown"],"output_types":["rendered UI display — format unknown (text notation, visual chord diagrams, staff notation, or audio playback)","potentially exportable data — format and mechanism unknown"],"categories":["text-generation-language","image-visual"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"tool_chord-variations__cap_3","uri":"capability://automation.workflow.free.tier.access.with.no.authentication.or.signup.requirement","name":"free-tier access with no authentication or signup requirement","description":"Provides unrestricted access to all documented features (chord progression builder, AI generation, output rendering) without requiring user registration, login, or payment. The tool is deployed on Vercel as a public web application with no visible paywall, freemium boundaries, or rate-limiting enforcement. Users can immediately begin building and generating chord progressions upon page load without account creation friction.","intents":["I want to try the tool immediately without creating an account or providing payment information","I need a zero-friction entry point for casual harmonic experimentation","I want to share the tool with collaborators without managing user accounts or licenses"],"best_for":["hobbyist musicians and students with no budget for composition tools","casual experimenters seeking quick harmonic inspiration without commitment","music educators introducing students to AI-assisted composition without licensing overhead"],"limitations":["No documented rate limiting, quota, or fair-use policy; unclear if heavy usage is throttled or blocked","No user accounts means no progression history, saved presets, or personalization across sessions","No premium tier or upgrade path documented; monetization model unknown (may rely on ads, data collection, or future paywalls)","Backend reliability issues evident from error state on page load; free tier may have lower SLA than paid alternatives","No support or SLA guarantees for free users; service could be discontinued without notice"],"requires":["Web browser with internet access","No API key, authentication token, or payment method required","No software installation or DAW integration required"],"input_types":["user interaction via web UI (no API access documented)"],"output_types":["generated chord progressions (format unknown)"],"categories":["automation-workflow","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"tool_chord-variations__cap_4","uri":"capability://automation.workflow.generation.cancellation.with.stop.button.for.in.flight.requests","name":"generation cancellation with stop button for in-flight requests","description":"Provides a 'Stop' button in the UI that allows users to cancel an in-flight chord progression generation request before the ~1-minute latency completes. When clicked, the button sends a cancellation signal to the backend (mechanism unknown — could be HTTP abort, WebSocket close, or explicit cancel endpoint) to terminate the generation process and return control to the user. This enables users to escape long-running requests without waiting for completion or refreshing the page.","intents":["I want to cancel a generation request if it's taking too long or I've changed my mind about the input","I need to interrupt a stuck or erroring generation without losing my progression state","I want to quickly iterate without waiting for slow generations to complete"],"best_for":["users with low tolerance for latency who want to abort slow requests","rapid iterators who want to try multiple progressions without waiting for each to complete","users experiencing backend errors or timeouts who need a manual escape hatch"],"limitations":["Cancellation mechanism not documented; unclear if it cleanly terminates backend processing or merely hides the loading state","No confirmation dialog or warning before cancellation; accidental clicks could discard in-progress work","No indication of cancellation status or whether backend processing actually stopped (could continue consuming resources)","Stop button only visible during generation; users cannot preemptively cancel before starting","No timeout-based automatic cancellation; users must manually click Stop if generation hangs"],"requires":["Active generation request in progress (loading state visible)","Browser support for request cancellation (standard in modern browsers)"],"input_types":["user click on 'Stop' button"],"output_types":["cancellation signal sent to backend (mechanism unknown)","UI returns to pre-generation state with progression intact"],"categories":["automation-workflow","tool-use-integration"],"confidence":0.5,"matches":0,"success_rate":0}],"trust":{"score":39,"verified":false,"data_access_risk":"high","permissions":["Web browser with JavaScript enabled","Basic music theory knowledge (understanding chord nomenclature like 'Minor-major 7th', 'Half-diminished 7th')","No authentication or signup required","Active internet connection to backend API","Backend service availability (Vercel serverless functions or equivalent)","Unknown: API key or authentication mechanism (not visible in UI)","Tolerance for ~60 second generation latency per request","Successful backend generation (see previous capability)","Browser capable of rendering output format (text, SVG, canvas, or audio element)","Unknown: DAW or notation software if exporting is intended"],"failure_modes":["Hard maximum of 5 chords per progression limits input complexity; many songs exceed this constraint","No support for chord inversions, voicings, or bass notes — only root position implied","No constraint specification (e.g., 'stay in C major scale', 'avoid parallel fifths') — all chord qualities treated equally","No progression templates, presets, or genre-specific starting points provided","No undo/redo functionality visible; users must manually remove and re-add chords to modify","Generation latency of ~1 minute per request severely limits iteration speed; unsuitable for real-time composition workflows","No documented variation strategy or music theory constraints applied; unclear whether AI respects key, scale mode, or voice-leading rules","Backend error state visible on page load ('There was an error generating the chord progression'), suggesting reliability issues or API dependency problems","No batch generation capability; users must wait 1 minute between each variation request","No explanation or harmonic analysis provided for why specific variations were generated — purely generative without educational context","builder identity is not verified yet","no observed match outcomes yet"],"rank_breakdown":{"adoption":0.31666666666666665,"quality":0.67,"ecosystem":0.15000000000000002,"match_graph":0.25,"freshness":0.75,"weights":{"adoption":0.25,"quality":0.25,"ecosystem":0.1,"match_graph":0.35,"freshness":0.05}},"observed_outcomes":{"matches":0,"success_rate":0,"avg_confidence":0,"top_intents":[],"last_matched_at":null},"maintenance":{"status":"active","updated_at":"2026-05-24T12:16:29.716Z","last_scraped_at":"2026-04-05T13:23:42.561Z","last_commit":null},"community":{"stars":null,"forks":null,"weekly_downloads":null,"model_downloads":null,"model_likes":null}},"distribution":{"claim_url":"https://unfragile.ai/submit?claim=chord-variations","compare_url":"https://unfragile.ai/compare?artifact=chord-variations"}},"signature":"cON+2TWjn+U0nDkL0cHkVydDC1tLiHx1dG7YK0LzxlY2+sRYmUw7iKb7lYHL2/vF0Ph+VxVv1C8eVHYZQW2SBg==","signedAt":"2026-06-21T03:45:47.996Z","signedBy":"unfragile.ai","version":1},"_links":{"self":"https://unfragile.ai/api/v1/passport/chord-variations","artifact":"https://unfragile.ai/chord-variations","verify":"https://unfragile.ai/api/v1/verify?slug=chord-variations","publicKey":"https://unfragile.ai/api/v1/trust-passport-public-key","spec":"https://unfragile.ai/trust","schema":"https://unfragile.ai/schema.json","docs":"https://unfragile.ai/docs"}}