David Meister thedavidmeister

A context cap as a Claude Code hook

MEMORY.md loads into context at the start of every session, so its size is a recurring cost paid on every turn of every conversation in that scope. Claude Code's own limit (200 lines / 25KB) is a truncation point, not a budget: content past it is silently dropped on the next load. This hook enforces a real budget well below that, so the index stays an index.

Both files below are in production use, not written for this gist.

Keybase proof

I hereby claim:

I am thedavidmeister on github.
I am thedavidmeister (https://keybase.io/thedavidmeister) on keybase.
I have a public key ASBKQkYiiUzEGTaJXeprS2wAf0fwr0lZRIyebqvmEAtepAo

To claim this, I am signing this object:

	# Strat: Recharging tranches
	#
	# High level idea is that the strategy offers a firm price for batches of tokens.
	# Each batch is called a "tranche".
	#
	# Every time a batch of tokens fully clears a new price further from the previous
	# trades is offered for the next tranche.
	#
	# For example, if 1000 BLUE was available in a tranche to buy RED at
	# 1 BLUE per RED and this fully cleared, the next tranche might be to buy up to

	/* op meta ref 613769424da0faccd68bfa8d9b3af911a278c706 */
	@0x47ed85f917e187757bff09371cedcf5c0eb277c27e4673feb2d3cc040c66c993

	/* ob meta ref 613769424da0faccd68bfa8d9b3af911a278c706 */
	@0x56ffc3fc82109c33f1e1544157a70144fc15e7c6e9ae9c65a636fd165b1bc51c

	#one 1e18
	#target-threshold 1e14
	#start-time 1683480203

	rec {
	normalize-artifact-target = target:
	builtins.replaceStrings
	[ "unknown" ]
	[ "generic" ]
	target
	;
	artifact-name = args: "${args.name}-${args.version}-${normalize-artifact-target args.target}";

	artifact-url = args: "https://github.com/${args.owner}/${args.repo}/releases/download/${args.version}/${artifact-name args}.tar.gz";

	Vagrant.configure("2") do \|config\|
	config.vm.box = "holochain-vagrant"
	config.vm.box_url = "https://holochain.love/box"

	config.vm.provider "virtualbox" do \|vb\|
	# Customize the amount of memory on the VM:
	vb.memory = "4096"
	vb.cpus = "4"
	vb.customize ["modifyvm", :id, "--hwvirtex", "off"]
	end

	let
	holonix = import (fetchTarball {
	url = "https://github.com/holochain/holonix/tarball/master";
	});
	# holonix = import ../holonix;
	in
	with holonix.pkgs;
	{
	core-shell = stdenv.mkDerivation (holonix.shell // {
	name = "app-shell";

	# -- mode: ruby --
	# vi: set ft=ruby :

	# All Vagrant configuration is done below. The "2" in Vagrant.configure
	# configures the configuration version (we support older styles for
	# backwards compatibility). Please don't change it unless you know what
	# you're doing.
	Vagrant.configure("2") do \|config\|
	# The most common configuration options are documented and commented below.
	# For a complete reference, please see the online documentation at