Déjà exists to prove exactly
how failure was resolved.
We built Déjà because we were tired of solving the same outage twice — and tired of “tribal memory” being the only thing standing between calm infrastructure and chaos. Déjà is institutional memory with a cryptographic chain of custody: deterministic, auditable, and built for engineers who don’t trust vibes.
Who we are
Déjà is built by engineers and operators who have lived inside production incidents — the high-pressure hours where context disappears, handoffs fail, and “who remembers the fix?” becomes the single point of failure. We’re building a system that makes those fixes repeatable, not rediscovered.
The problem
Most production incidents aren’t new problems — they’re old problems wearing new clothes. Engineers spend hours diagnosing an issue that was already fixed months ago, but the fix is buried in logs, pull requests, ticket threads, or the memory of someone who’s no longer there.
Déjà turns resolved failures into an asset you can query under pressure. When an error reappears, Déjà surfaces the last proven fix — with evidence that links the recurrence to the exact change that stopped it.
Clarity
| What Déjà is | What Déjà is not |
|---|---|
Institutional memory for production incidents — recalls proven fixes when the same failure returns. permanent_assetevidence_linked | Not a wiki. Wikis depend on humans to remember to write things down (and to keep them updated). manual_maintenancestale_by_default |
Cryptographic chain of custody — links recurrence → fingerprints → fix PR deterministically. audit_readydeterministic_math | Not "Copilot guessing." Déjà doesn’t speculate. It only speaks when it has something proven to say. probabilistic_outputunverifiable |
Regression defense — turns outages into testable, repeatable knowledge. regression_suitecalm_infra | Not "another Jira." Ticketing systems track what people said and did — not which change actually resolved the failure. activity_log_onlyweak_evidence |
for production incidents — recalls proven fixes when the same failure returns.
Wikis depend on humans to remember to write things down (and to keep them updated).
— links recurrence → fingerprints → fix PR deterministically.
Déjà doesn’t speculate. It only speaks when it has something proven to say.
— turns outages into testable, repeatable knowledge.
Ticketing systems track what people said and did — not which change actually resolved the failure.
Philosophy
Memory compounds over time
Every resolved incident increases the value of the system. Déjà turns fixes into durable assets that survive turnover.
Proven fixes beat speculation
We reject probabilistic resolution. If the fix can’t be verified, Déjà stays silent.
Context matters more than noise
Normalize the signal. Strip the irrelevant. Preserve the evidence that links recurrence to resolution.
Infrastructure should feel calm
When systems behave predictably, teams move faster. Déjà is the quiet layer that prevents regressions from becoming surprises.