01
FUN / RUBRIC LAB
Startup Idea Stress Test
Inspect what your startup description still leaves unsupported—without pretending to predict success.
CATALOG / 24 SIGNALS
Jev use cases,
with their boundaries intact.
Six experiments run inside this bounded lab. Eighteen cards point to public projects and author demos. A link is not a claim that we reproduced the project.
ONSITE / 06
Interactive experiments
02
FUN / TONE PANEL
Draft Vibe Check
Evaluate a draft against visible tone and clarity rubrics, then compare versions without generated rewrites.
03
BUILD / BOUNDED AGENT
Agent Navigation Sandbox
Watch a typed decision select legal actions inside a six-step simulated settings panel.
04
BUILD / ROUTING CONSOLE
Route Lab
Compare Jev’s selected route with the path your application policy is willing to execute.
05
BUILD / CONTEXT FILTER
Context Pruner
Evaluate bounded context blocks, preserve pinned constraints, and prune conservatively.
06
BUILD / EVIDENCE DESK
Evidence Check
Classify how supplied evidence relates to a claim—without searching the web or declaring outside-world truth.
EXTERNAL / 18
Public project index
Checked 20 Sep 2026
UC03External project
Mobile UI automation
An Android automation prototype that selects from visible UI actions.
- Jev
- Selects a UI action.
- Code
- A mobile automation service executes taps and other actions.
Limit: Requires a device or cloud phone; reaching checkout does not mean an order was completed.
View original project ↗UC04External project
Layered code review
A public project that classifies code changes into review layers.
- Jev
- Assesses risk, candidate issues, and severity.
- Code
- Reads the diff, organizes checks, and presents the results.
Limit: Not proof of an automated audit; it does not execute user code.
View original project ↗UC05External project
Semantic Postgres filtering
A public experiment that brings semantic decisions into database workflows.
- Jev
- Decides whether a record matches a text condition.
- Code
- Database functions filter or sort the records.
Limit: The example conditions are not standard SQL; data may be sent to an external service.
View original project ↗UC09External project
Music theory choices
A Jev experiment for selecting playable music-theory actions.
- Jev
- Evaluates or selects music-theory candidates.
- Code
- Instrument and playback code presents the result.
Limit: Jev is not an audio generation model; timbre comes from code or supplied assets.
View original project ↗UC10External project
Jevthoven composition
A MIDI composition project driven by typed musical decisions.
- Jev
- Selects instrument, chord, or rhythm candidates.
- Code
- Application code generates the MIDI events.
Limit: This combines bounded musical building blocks; it is not open-ended composition.
View original project ↗UC11External project
Snake decisions
A small game demo where code executes Jev-selected moves.
- Jev
- Selects a legal movement direction.
- Code
- The game engine handles collisions and food.
Limit: A legal move is not necessarily optimal; prerecorded replays should not be presented as live.
View original project ↗UC12External project
Stealth guard NPC
A bounded game agent that chooses guard behavior from world state.
- Jev
- Assesses suspicion, targets, and actions.
- Code
- The world engine executes actions and resolves the outcome.
Limit: The decision input is structured state, not an unrestricted understanding of the game screen.
View original project ↗UC16External project
Jev plays chess
A documented chess experiment comparing typed move selection.
- Jev
- Selects the next move from legal candidates.
- Code
- A chess engine enforces the rules and resolves the result.
Limit: The author's experiment is not this site's chess benchmark and should not be extrapolated into a ranking.
View original project ↗UC18External project
Automatic slide advance
An author demo that decides when a presentation should move forward.
- Jev
- Evaluates semantic progress through the presentation.
- Code
- Speech transcription and slide software perform the advance.
Limit: Speech recognition comes from another system; the initial site adaptation uses text only.
View original project ↗UC19External project
Semantic Unix pipes
A command-line project for semantic filtering in a Unix-style workflow.
- Jev
- Filters, classifies, or scores supplied records.
- Code
- The CLI processes JSONL and exit statuses.
Limit: This site does not execute arbitrary shell commands.
View original project ↗UC20External project
Knowledge graph navigation
A project that selects the next graph edge from the current state.
- Jev
- Selects the next relationship to follow.
- Code
- Neo4j or graph application code performs the traversal.
Limit: This is not a verified global shortest-path solver.
View original project ↗UC21External project
Agent completion checks
A public project that evaluates whether an agent has evidence of completion.
- Jev
- Provides a semantic signal about a completion claim.
- Code
- Tests and an evidence ledger determine whether completion is supported.
Limit: Jev cannot replace actually running the tests.
View original project ↗UC22External project
JevBird trajectories
A compact game demo that chooses among bounded movement trajectories.
- Jev
- Selects from candidate movement strategies.
- Code
- Application code predicts and executes the trajectory.
Limit: This is not direct, continuous control of the physics simulation.
View original project ↗UC23External project
Sponsor segment detection
A project that evaluates transcript segments for video skipping.
- Jev
- Classifies transcript segments or assigns probabilities.
- Code
- The player prompts or skips when a configured threshold is met.
Limit: Classifying a transcript is not the same as directly understanding video.
View original project ↗UC24External project
json-render composition
An integration that uses typed decisions to select UI components.
- Jev
- Selects a bounded component or specification.
- Code
- The renderer produces the visible interface.
Limit: The related APIs are experimental and should not be treated as stable dependencies.
View original project ↗UC25External project
Instinct UI generator
A public experiment for choosing interface composition primitives.
- Jev
- Selects component, field, and style candidates.
- Code
- The frontend renders prebuilt interface primitives.
Limit: Jev does not directly generate arbitrary source code in this project.
View original project ↗UC27External project
Wikipedia pathfinding
A bounded navigation experiment across Wikipedia links.
- Jev
- Evaluates candidate links.
- Code
- The search program maintains the queue and path.
Limit: This site's sandbox does not crawl arbitrary pages or claim a real-time shortest path.
View original project ↗UC31External project
Audio beep automation
A project that identifies where supplied recordings should be censored.
- Jev
- Decides whether a word should be muted under the supplied rules.
- Code
- ffmpeg edits the corresponding time ranges.
Limit: Jev does not perform transcription or audio editing; real-time operation has not been verified.
View original project ↗