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we're live at mirrors.dev🪞

no more "just add one more line to the prompt."
introducing Mirrors 🪞 find the mistakes your AI agent keeps making and fix them in real time.

spot what keeps going wrong, write the fix once, preview where it lands, and measure if it helped.

no more "just add one more line to the prompt."
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we’ve retired the hammer with mirrors 🪞
every team shipping AI agents right now is playing whack-a-mole:

fix the system prompt for one customer → breaks for another → patch it → breaks for a third → repeat forever

we built @mirrorsdotdev so you can put down the damn hammer 🔨
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mirrors.dev exists precisely for this
ngl evals are getting less useful with every model release

the better models get at noticing they’re being tested, the less a passing eval tells you about prod

the only environment a model can’t tell apart from prod is prod. reliability work is shifting from “test before you ship” to “fix it while it runs”
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mirrors🪞 retweeted
ngl evals are getting less useful with every model release

the better models get at noticing they’re being tested, the less a passing eval tells you about prod

the only environment a model can’t tell apart from prod is prod. reliability work is shifting from “test before you ship” to “fix it while it runs”
"We'll build realistic evals to determine how the model will handle situations in the real world"

The model during evals:
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mirrors🪞 retweeted
cheffing up something new @runmirrors at the yc office

thinking of calling it dynamic context editing
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🪞🪞🪞
i just spent the summer sleeping in the tenderloin. now sleeping in dogpatch.

thank you @ycombinator and @amiklas for the upgrade.

proof attached ↓
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mirrors🪞 retweeted
Off Season II at @fdotinc last Friday: ~100 teams, six weeks of building.
Our founder @SidraMiconi spent Friday night filming what people built during six weeks at @fdotinc.

10 demos from a room of ~100 teams.

The full cuts are coming!
@ai_singhal → @runmirrors
@pedro_nagamine @autobrik + @alvax64 → @robonet_
@HeapSmasher → @reachpad
@hasnainbaig06 + @Jahenderson05 → @mirdainsystems
@001TMF + @MukherjeeArvaan → Proteus-Bio
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mirrors🪞 retweeted
your AI agent will do something expensive eventually

so we built a staging environment for AI agents

here's 90 seconds on it ↓
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