ivan

Codex found a kernel edge case where dedupe does update mtime and ctime.

What goes wrong:

• btrfs dedupes in 16 MiB chunks. If the file being kept has a hole (a sparse, never-written region) at the end of a chunk, btrfs punches a matching hole in the other file. It does this through a helper call that doesn't tell the helper this is a dedupe (reflink.c:660-661, the NULL argument).
• That helper works from a small metadata budget. If removing the other file's extents uses it up, the helper goes round a retry loop (file.c:2412, block-rsv.c:94-101).
• The retry loop sets mtime and ctime to "now" unless it was told this is a dedupe (file.c:2496-2498). The comment right above that line says dedupe is supposed t

ivan

After making changes

Automatically commit your changes with this commit template:

subsystem: short one-line description; semicolon if multiple changes

Model-output: model name e.g. Claude Fable 5

ivan

diff --git a/nixos/modules/system/boot/loader/grub/grub.nix b/nixos/modules/system/boot/loader/grub/grub.nix
index 042fd63cd254..6d319a3d3ca3 100644
--- a/nixos/modules/system/boot/loader/grub/grub.nix
+++ b/nixos/modules/system/boot/loader/grub/grub.nix
@@ -90,6 +90,9 @@ let
           else
             args.efiBootloaderId;
         timeout = if config.boot.loader.timeout == null then -1 else config.boot.loader.timeout;
+        dynamicLimit               = cfg.dynamicConfigurationLimit.enable;
+        dynamicLimitMarginMB       = cfg.dynamicConfigurationLimit.marginMB;

ivan

#!/usr/bin/env python3

# Model-output: ChatGPT 5.6 Sol (High)

"""Patch The Witness stair movement and bypass its startup corruption guard.

The movement patch rescales a player-only walk-manifold request when traversal adds
vertical displacement. The startup patch removes the conditional jump that routes
a zero critical-asset sentinel to ``fatal_error_data_corruption``. The PE file size
and section count remain unchanged.

ivan

// ==UserScript==
// @name         leave my text alone (chatgpt.com)
// @namespace    https://chatgpt.com/
// @version      1.0.0
// @description  Keep every chat turn mounted in the DOM (defeats IntersectionObserver-driven unloading) so find-in-page and SingleFile capture whole conversations.
// @match        https://chatgpt.com/*
// @match        https://chat.openai.com/*
// @run-at       document-start
// @grant        none
// @inject-into  page

ivan

// ==UserScript==
// @name         leave my text alone (claude.ai)
// @namespace    https://claude.ai/
// @version      1.0.0
// @description  Keep every chat message mounted in the DOM (defeats list virtualization) so find-in-page and SingleFile capture whole conversations.
// @match        https://claude.ai/*
// @run-at       document-idle
// @grant        none
// @inject-into  page
// @noframes

ivan

rsync -av -@-1 as the baseline thing
or with --delete to remove things from DEST, and probably
--delete-excluded when using --exclude
rsync -@-1 compares timestamps by nanoseconds instead of seconds, which is important for transferring e.g. PostgreSQL data; rsync doesn't read the data inside each file if the (mtime, size) matches on both ends, unless you:
rsync -c
rsync -X to also copy xattrs (slower)
rsync -H for hard link preservation (uses memory to track all the inodes)
rsync -S to preserve sparseness in sparse file
rsync --zc=zstd
rsync --zc=zstd --compress-level=6  or maybe 8 where the link is slow and extra compression is useful

ivan

#persistent
#singleinstance Force

; The idea here is to remap the left edge of the numpad
; to a single column of Home/PgUp/PgDn/End keys.
Numlock::Home
NumpadHome::PgUp
NumpadLeft::PgDn
NumpadEnd::End

ivan

#persistent
#SingleInstance Force

; The idea here is to remap the entire numpad (with Numlock off)
; to a scroll lock area with:
;       Ins   Home  PgUp
;       Del   End   PgDn
;       Up    Up
; Left  [  Down  ]  Right
;

ivan

{ lib, pkgs, ... }:

let
  max_args = 100;
  log_fails = false;

  execsnoop_args =
    assert max_args >= 1;
    [
      "--time"