Commands, options, presets and privacy. For the overview, benchmarks and install, see the README.
| Preset | ceiling | effort cap | mode | for |
|---|---|---|---|---|
lean (default) |
sonnet (Opus only at 90% confidence) | medium | balanced | most work: small tasks on Haiku, the rest on Sonnet |
balanced |
none | high | balanced | the 0.2 and 0.3 behaviour |
max |
none | none | efficient | when quality matters more than cost |
/jev preset <name> switches for the session; the preset option sets it permanently. /jev ceiling, /jev cap and the other commands still override one setting. The default is lean (the shipped option values are the lean ones; CI checks that they match).
| Part | Meaning |
|---|---|
balanced |
Routing mode: efficient, balanced or cheap |
sonnet ▂▄__ |
The model the task runs on, with its tier. Green haiku, blue sonnet, purple opus, gold fable |
medium ▰▰▱▱▱ |
Reasoning effort, low to max |
conf ▮▮▮▮▯ 88% |
How sure Jev is. Green from 70%, amber from 50%, red below |
cache 🔒 warm 42k |
Whether the prompt cache is still worth protecting, and how big it is |
When the cache wins, the band says so: opus (kept 🔒 cache warm; wanted haiku). A model that differs from the pick reads sonnet (picked opus); ⤓xhigh means the effort cap lowered Jev's effort; 🔓 means the prompt ran uncapped; ↑ escalation; 📌 pinned; ⤒opus clamped by the ceiling.
| Command | What it does |
|---|---|
/jev or /jev status |
Settings, cache state, last decision and per-model usage |
/jev efficient | balanced | cheap |
Set the routing mode, from the next task |
/jev sticky off | auto | strict |
Set cache stickiness |
/jev cap low | medium | high | xhigh | max | none |
Set the effort cap |
/jev preset lean|balanced|max |
Switch the ceiling, effort cap and mode together |
/jev ceiling <model|none> |
Never go above this model unless Jev is very sure |
/jev floor <model|none> |
Never go below this model |
/jev full |
Lift the effort cap for the next prompt only |
/jev stats clear |
Reset the savings tally |
/jev on / /jev off |
Enable routing / use the session model |
/jev key <key> |
Store the TypeSafe API key |
┌ Jev router ────────────────────────────┐
│ state ● on mode balanced │
│ pool haiku · sonnet · opus · fable │
│ sticky auto cache ● warm │
│ last sonnet / medium ▮▮▮▮▯ 0.88 │
│ usage haiku ░░░░░░░░░░ 0 0% │
│ sonnet ██████████ 1 100% │
│ opus ░░░░░░░░░░ 0 0% │
│ fable ░░░░░░░░░░ 0 0% │
│ key …fd1c (TYPESAFE_API_KEY) │
└────────────────────────────────────────┘
| Option | Default | Meaning |
|---|---|---|
router |
jev |
The System One model that picks: jev (TypeSafe), laya or kev (self-hosted). See the README |
routerModel |
empty | Override the router's model id (jev-latest, laya, kev-latest), e.g. jev-1.14 |
routerUrl |
empty | Override the router's endpoint. TypeSafe keys are only sent to api.typesafe.ai |
mode |
balanced |
Routing mode |
models |
all four | Aliases Jev may choose from |
preset |
none |
lean, balanced or max overrides the three options below. none: the options apply as set (the shipped defaults are the lean values) |
effortCap |
medium |
Highest effort the router applies. none follows Jev. Per prompt: start with !full or run /jev full |
ceiling |
sonnet |
Highest model Jev may pick unless it is ceilingBreak sure (haiku, sonnet, opus, fable) |
floor |
none |
Lowest model Jev may pick |
ceilingBreak |
0.9 |
Confidence needed to exceed the ceiling |
pauseMs |
60000 |
Stop asking Jev for this long after 3 failed calls in a row |
escalateAfter |
3 |
Failed tool calls in a row before the task moves up one model. 0 is off |
baselineModel |
opus |
The model the savings estimate compares against |
sendHistory |
true |
Send recent messages to Jev. Off sends only the task text |
redact |
true |
Replace API keys, tokens, private keys and KEY=value lines with [redacted] before sending |
maxTaskChars |
8000 |
How much of the prompt is sent |
fallback |
session |
When Jev is down: session keeps the session model, heuristic guesses locally |
routeSteps |
true |
Ask Jev again before every step after the first. Off: one call per prompt |
routeSubagents |
true |
Pick a model and effort for each subagent from its description |
stickiness |
auto |
off: always follow Jev. auto: while the cache is warm, only upgrade on high confidence. strict: never switch while warm |
minConfidence |
0.7 |
Confidence needed for a warm-cache upgrade |
minContextTokens |
8000 |
Below this a switch is free and stickiness is skipped |
cacheTtlMs |
300000 |
Time after the last request when the cache counts as cold |
timeoutMs |
4000 |
Keep the current model when Jev takes longer |
Sent to api.typesafe.ai (or your routerUrl): the prompt text (up to maxTaskChars), recent messages if sendHistory is on, and subagent descriptions. Before sending, redact replaces API keys, GitHub tokens, AWS keys, bearer tokens, private key blocks and NAME_KEY=value style lines with [redacted]. That is pattern matching, not a guarantee, so keep sendHistory off if your conversations carry things it would not catch. Your TypeSafe key is stored in the plugin store in plain text if you use /jev key, and the command line lands in the transcript; prefer the TYPESAFE_API_KEY environment variable.