Philipp Krenn
@xeraa.net
🎩 of DevRel & Developer 🥑 at Elastic — posts about Elasticsearch, Kibana, search, observability, security
detox after re:invent / las vegas: angel‘s landing at sunset
December 7, 2025 at 3:02 AM
detox after re:invent / las vegas: angel‘s landing at sunset
side job of the day: making fully monitored coffees at #AWSreInvent
making developer dreams come true 😂
PS: dashboards are public on ela.st/beans-streams
making developer dreams come true 😂
PS: dashboards are public on ela.st/beans-streams
December 3, 2025 at 4:36 PM
side job of the day: making fully monitored coffees at #AWSreInvent
making developer dreams come true 😂
PS: dashboards are public on ela.st/beans-streams
making developer dreams come true 😂
PS: dashboards are public on ela.st/beans-streams
hierarchy of (LLM coding( leverage): how CLAUDE md > specification > research > plan > code
and how to write a good CLAUDE md — but keep it short
www.humanlayer.dev/blog/writing...
and how to write a good CLAUDE md — but keep it short
www.humanlayer.dev/blog/writing...
December 3, 2025 at 3:37 AM
hierarchy of (LLM coding( leverage): how CLAUDE md > specification > research > plan > code
and how to write a good CLAUDE md — but keep it short
www.humanlayer.dev/blog/writing...
and how to write a good CLAUDE md — but keep it short
www.humanlayer.dev/blog/writing...
But How Do AI Images and Videos Actually Work?
diffusion models, CLIP, and the papers + math behind it — great weekend video: www.youtube.com/watch?v=iv-5...
diffusion models, CLIP, and the papers + math behind it — great weekend video: www.youtube.com/watch?v=iv-5...
November 24, 2025 at 3:09 AM
But How Do AI Images and Videos Actually Work?
diffusion models, CLIP, and the papers + math behind it — great weekend video: www.youtube.com/watch?v=iv-5...
diffusion models, CLIP, and the papers + math behind it — great weekend video: www.youtube.com/watch?v=iv-5...
November 22, 2025 at 1:20 AM
european bureaucracy: it "only" took 2.5 years to get a delayed flight paid out. and after all the costs (including a laywer) you only get 50%. but I'll still take the win 😉
PS: and I have an even older claim still under negotiations 🫠
PS: and I have an even older claim still under negotiations 🫠
November 19, 2025 at 6:55 PM
european bureaucracy: it "only" took 2.5 years to get a delayed flight paid out. and after all the costs (including a laywer) you only get 50%. but I'll still take the win 😉
PS: and I have an even older claim still under negotiations 🫠
PS: and I have an even older claim still under negotiations 🫠
what's the story with langchain vs langgraph?
I thought the focus was switching over to langgraph but the contributions for langchain seem to have taken over again
I thought the focus was switching over to langgraph but the contributions for langchain seem to have taken over again
November 17, 2025 at 4:47 AM
what's the story with langchain vs langgraph?
I thought the focus was switching over to langgraph but the contributions for langchain seem to have taken over again
I thought the focus was switching over to langgraph but the contributions for langchain seem to have taken over again
how to end the week in the office: give elkie a belly rub
November 15, 2025 at 8:17 AM
how to end the week in the office: give elkie a belly rub
if you're in SF on monday, we'll have a hardware oriented meetup together with microsoft (right at the start of #MSIgnite):
* Bad AI In A Box (BAIIAB) — making AI touch grass
* monitor our coffee consumption — live debug coffee from across the world. and we'll hand out excellent coffee as a demo
* Bad AI In A Box (BAIIAB) — making AI touch grass
* monitor our coffee consumption — live debug coffee from across the world. and we'll hand out excellent coffee as a demo
November 14, 2025 at 5:50 PM
if you're in SF on monday, we'll have a hardware oriented meetup together with microsoft (right at the start of #MSIgnite):
* Bad AI In A Box (BAIIAB) — making AI touch grass
* monitor our coffee consumption — live debug coffee from across the world. and we'll hand out excellent coffee as a demo
* Bad AI In A Box (BAIIAB) — making AI touch grass
* monitor our coffee consumption — live debug coffee from across the world. and we'll hand out excellent coffee as a demo
while we all love ourselves some ML, sometimes all you need is a little bit of math. great post from one of my colleagues on how to tune your shopping results based on history (with a function score)
alexmarquardt.com/personalizin...
alexmarquardt.com/personalizin...
November 12, 2025 at 7:35 AM
while we all love ourselves some ML, sometimes all you need is a little bit of math. great post from one of my colleagues on how to tune your shopping results based on history (with a function score)
alexmarquardt.com/personalizin...
alexmarquardt.com/personalizin...
got the right "business" cards for #KubeCon
sorry, no YAML 😉
this was more fun to build than expected: @claudeai generated HTML design with a *download as image* button. @MOO to print and ship them
github.com/xeraa/code-c... for the implementation
sorry, no YAML 😉
this was more fun to build than expected: @claudeai generated HTML design with a *download as image* button. @MOO to print and ship them
github.com/xeraa/code-c... for the implementation
November 8, 2025 at 12:36 AM
got the right "business" cards for #KubeCon
sorry, no YAML 😉
this was more fun to build than expected: @claudeai generated HTML design with a *download as image* button. @MOO to print and ship them
github.com/xeraa/code-c... for the implementation
sorry, no YAML 😉
this was more fun to build than expected: @claudeai generated HTML design with a *download as image* button. @MOO to print and ship them
github.com/xeraa/code-c... for the implementation
fun #TLS fact: why would you want your own certificate authority (CA) over a public one?
if you form a cluster (like elasticsearch), you want to control who can join 1/3
if you form a cluster (like elasticsearch), you want to control who can join 1/3
November 6, 2025 at 10:43 AM
fun #TLS fact: why would you want your own certificate authority (CA) over a public one?
if you form a cluster (like elasticsearch), you want to control who can join 1/3
if you form a cluster (like elasticsearch), you want to control who can join 1/3
the #elasticsearch API docs always had cURL and console examples. a while ago we added dynamic languages (python, JS, ruby, PHP)
now, we have the first static language with java
big API surface so this will come in handy. even if just to tell an LLM "no, use the API like this" 😉
now, we have the first static language with java
big API surface so this will come in handy. even if just to tell an LLM "no, use the API like this" 😉
November 4, 2025 at 4:21 PM
the #elasticsearch API docs always had cURL and console examples. a while ago we added dynamic languages (python, JS, ruby, PHP)
now, we have the first static language with java
big API surface so this will come in handy. even if just to tell an LLM "no, use the API like this" 😉
now, we have the first static language with java
big API surface so this will come in handy. even if just to tell an LLM "no, use the API like this" 😉
#CalHacks was a crazy weekend. great projects with @elastic.co agent builder, RAG, geo and timeseries data: lnkd.in/dJ6H5cAk
PS: we also served a ton of (monitored) coffee. but that‘s for a separate post…
PS: we also served a ton of (monitored) coffee. but that‘s for a separate post…
October 27, 2025 at 5:42 AM
#CalHacks was a crazy weekend. great projects with @elastic.co agent builder, RAG, geo and timeseries data: lnkd.in/dJ6H5cAk
PS: we also served a ton of (monitored) coffee. but that‘s for a separate post…
PS: we also served a ton of (monitored) coffee. but that‘s for a separate post…
AWS outage / post-mortem: not one but two follow-up problems. and of course it started with DNS 😬
aws.amazon.com/message/101925/
aws.amazon.com/message/101925/
October 23, 2025 at 7:41 AM
AWS outage / post-mortem: not one but two follow-up problems. and of course it started with DNS 😬
aws.amazon.com/message/101925/
aws.amazon.com/message/101925/
#ElasticON closing keynote by @swyx: the year agents ate search
from RAG, agentic RAG, and context engineering subagents 🔮
from RAG, agentic RAG, and context engineering subagents 🔮
October 21, 2025 at 11:24 PM
#ElasticON closing keynote by @swyx: the year agents ate search
from RAG, agentic RAG, and context engineering subagents 🔮
from RAG, agentic RAG, and context engineering subagents 🔮
how much data can you get from coffee? a lot ☕️
this has been a fun project — from sending the data with OTLP to watching every step. can‘t wait to bring it to events and show streams of logs to dashboards
this has been a fun project — from sending the data with OTLP to watching every step. can‘t wait to bring it to events and show streams of logs to dashboards
October 20, 2025 at 4:30 AM
how much data can you get from coffee? a lot ☕️
this has been a fun project — from sending the data with OTLP to watching every step. can‘t wait to bring it to events and show streams of logs to dashboards
this has been a fun project — from sending the data with OTLP to watching every step. can‘t wait to bring it to events and show streams of logs to dashboards
next week will be extra @elastic.co-packed in SF
monday: luma.com/smart-search
* ghita, @zeroentropyai.bsky.social: search tools for efficient AI agents
* jesse, fintools: LLMs and the next generation of financial search
* josh, reducto: vision-first RAG pipeline with reducto and elasticsearch
monday: luma.com/smart-search
* ghita, @zeroentropyai.bsky.social: search tools for efficient AI agents
* jesse, fintools: LLMs and the next generation of financial search
* josh, reducto: vision-first RAG pipeline with reducto and elasticsearch
Smarter Search, Smarter AI: RAG, Rerankers & Real-World Impact · Luma
Search isn’t just about finding answers anymore, it’s becoming the core infrastructure behind intelligent AI agents. This Monday, we’re bringing together…
luma.com
October 18, 2025 at 12:43 AM
next week will be extra @elastic.co-packed in SF
monday: luma.com/smart-search
* ghita, @zeroentropyai.bsky.social: search tools for efficient AI agents
* jesse, fintools: LLMs and the next generation of financial search
* josh, reducto: vision-first RAG pipeline with reducto and elasticsearch
monday: luma.com/smart-search
* ghita, @zeroentropyai.bsky.social: search tools for efficient AI agents
* jesse, fintools: LLMs and the next generation of financial search
* josh, reducto: vision-first RAG pipeline with reducto and elasticsearch
reddit answers — and I‘m not sure if they are trying to troll me or not: wooden data centers 😅
sounds like a logstash situation too
sounds like a logstash situation too
October 13, 2025 at 9:14 PM
reddit answers — and I‘m not sure if they are trying to troll me or not: wooden data centers 😅
sounds like a logstash situation too
sounds like a logstash situation too
and we got brand new toy. I hope that we can roll out coffee and related dashboards next week ☕️ #ElasticON
October 13, 2025 at 8:47 PM
and we got brand new toy. I hope that we can roll out coffee and related dashboards next week ☕️ #ElasticON
we'll have #ElasticON SF next week. I'm especially excited to have convinced @swyx.io to join us for the closing keynote on "the year agents ate search" — let's see how much we can all agree or disagree here :D
www.elastic.co/events/elast... (and we still have a couple of free slots available)
www.elastic.co/events/elast... (and we still have a couple of free slots available)
October 13, 2025 at 8:43 PM
we'll have #ElasticON SF next week. I'm especially excited to have convinced @swyx.io to join us for the closing keynote on "the year agents ate search" — let's see how much we can all agree or disagree here :D
www.elastic.co/events/elast... (and we still have a couple of free slots available)
www.elastic.co/events/elast... (and we still have a couple of free slots available)
AI gateways: envoy + elastic observability from adrian cole (we‘re going back to the zipkin days) #ElasticON
starting off with: what is agentic?
starting off with: what is agentic?
October 9, 2025 at 6:39 PM
AI gateways: envoy + elastic observability from adrian cole (we‘re going back to the zipkin days) #ElasticON
starting off with: what is agentic?
starting off with: what is agentic?
how do you get recommendations on tinder? a dee dive into the implementation of retrieval and ranking for millions of users and likes, billions of messages and swipes #ElasticON
October 9, 2025 at 5:31 PM
how do you get recommendations on tinder? a dee dive into the implementation of retrieval and ranking for millions of users and likes, billions of messages and swipes #ElasticON
kicking off #ElasticON NYC. I‘ll put the most relevant context (😉) in this thread — it will be a busy day
starting with joining forces with @jina.ai and @elastic.co www.elastic.co/blog/elastic... 🤗
starting with joining forces with @jina.ai and @elastic.co www.elastic.co/blog/elastic... 🤗
October 9, 2025 at 2:01 PM
kicking off #ElasticON NYC. I‘ll put the most relevant context (😉) in this thread — it will be a busy day
starting with joining forces with @jina.ai and @elastic.co www.elastic.co/blog/elastic... 🤗
starting with joining forces with @jina.ai and @elastic.co www.elastic.co/blog/elastic... 🤗