ATRIUMsearch → argument graph
Article · 2026-08-02 · 4 moments

condense-json 1.0

Release: condense-json 1.0 I'm trying to get braver at releasing 1.0 versions. This little library is a year and a half old now - I've applied some sensible and non-disruptive fixes and shipped the big 1.0 for it. Here's an example of what it can do, lifted from the README: { "foo": { "bar": { "string": "This is a string with foxes in it", "nested": { "more": ["Here is a string", "another with foxes in it too"] } } } } Combine that with a replace ✦ AI generated

Read original ↗
GUEST the authorHOST Simon Willison
01
Mechanism◆

condense_json(input_json, replacements) scans the input JSON for strings or substrings present in the replacements object and replaces them with a special {"$r": ...} syntax in the output.

The author explains the core mechanism: condense_json replaces matching strings or substrings from a replacements object with a special {"$r": ...} syntax, illustrated with a README example.

transcript

The author: It scans for strings or substrings that are present in that replacements object and replaces those with a special {"$r": ...} syntax in the output.

extends · 1provides context · 1

02
Context

I'm trying to get braver at releasing 1.0 versions, and I've shipped 1.0 for condense-json, a library that's a year and a half old.

The author announces the 1.0 release of condense-json, a library about a year and a half old, noting it shipped with sensible, non-disruptive fixes.

transcript

The author: I'm trying to get braver at releasing 1.0 versions. This little library is a year and a half old now - I've applied some sensible and non-disruptive fixes and shipped the big 1.0 for it.

provides context · 3

04
Claim◆

The purpose of condense-json is to make it easier to store JSON that includes duplicated data from other related structures, which I use to save space in the SQLite logs generated by LLM.

The author states the motivation: condense-json helps store JSON containing duplicated data from related structures, and he uses it to save space in SQLite logs generated by LLM.

transcript

The author: The idea is to make it easier to store JSON that includes duplicated data from other related structures. I use it to save space in the SQLite logs generated by LLM - see PR #1586 for the latest iteration of that.

Highlight slides
condense_json: Core Mechanism✦ from: condense_json(input_json, replacements) scans the input JSON for strings or substrings present in the replacements object and replaces them with a special {"$r": ...} syntax in the output.Why condense-json exists✦ from: The purpose of condense-json is to make it easier to store JSON that includes duplicated data from other related structures, which I use to save space in the SQLite logs generated by LLM.How It Works✦ from: condense_json(input_json, replacements) scans the input JSON for strings or substrings present in the replacements object and replaces them with a special {"$r": ...} syntax in the output.
Related episodes
Video · My First Million

Ray Dalio: the single biggest portfolio flaw keeping you poor

→
Video · Syntax

I Built an LLM From Scratch

→
Video · Lenny's Podcast

The rise of taste, human authenticity and judgment in an AI world | Adam Mosseri (Head of IG)

→