eMudhra Distrust: Why Bumping castore Won't Save Req
Eight eMudhra CA keys were guessable. Browsers blocked them in hours. Req reads CAs from the OS first, so bumping castore usually does nothing. Here's the fix.
Writing · Tag
Posts tagged Elixir
34 posts on Elixir, page 1 of 3. Or browse the full writing index →
Posts tagged Elixir
Scheduled Posts in Phoenix With No Database
This site has no database. Here's how a future-dated post stays invisible until its timestamp, and the three places the gate gave the wrong answer anyway.
Adding a Newsletter to a Phoenix Site With No Database
This site has no Ecto, no Repo, no database at all. Here's how the newsletter signup works when the system of record is a third-party API, not a table.
Elixir Libraries Discord and Supabase Open-Sourced
Discord and Supabase publish Elixir libraries. What each solves, whether it is still maintained in 2026, and whether a small team should depend on it.
Who Actually Runs Elixir in Production, Fact-Checked
A viral infographic ranked 15 companies using Elixir by valuation. Fact-checked: nine rows hold up, three are stale or unsupported, four name the wrong system.
Cisco's Network Config Engine Is Secretly Erlang
Cisco NSO and ConfD run their core on Erlang. Why the network-automation world never noticed, and where the BEAM actually fits this domain.
Validating LLM Tool Call Arguments With Ecto
Ecto schemaless changesets as the pre-execution trust boundary on LLM tool-call arguments, not another output-shape validator.
I Read Oban's Source Code So You Don't Have To
How Oban actually fetches jobs, notifies workers, and elects a leader, plus the VACUUM cost nobody mentions. Read from oban-bg/oban v2.23.1, not the README.
Building an LLM Audit Trail That Passes SOC 2
An append-only Ecto schema for LLM calls, the fields an auditor actually samples, and why provider request IDs are what makes an entry defensible.
Throttling LLM Calls in Elixir Before You Hit 429
LLM providers cap tokens per minute too, and you can't count a response's tokens before it lands. Size a Hammer bucket that never sends the call that 429s.
Wiring LiveView Uploads to Claude Vision
Boundary-validate uploads in allow_upload before they cost tokens, then wire consume_uploaded_entries into Claude vision and PDF calls from LiveView.
Structured LLM Output in Elixir: Which Library, When
Four Elixir options for schema-validated LLM output, scored on maintenance, provider coverage, retry behavior, and escape hatches.