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Krzysztof kuhy Rudnicki 143d260c1c
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Park phone DNS filtering: Private DNS fails closed, so the PC cannot host it
Measured on the Pixel 6a, twice: with private_dns_mode=hostname and the
resolver unreachable, `ping example.com` returns "unknown host". Android's
Private DNS does not fall back to the carrier's resolver -- hostname mode is
RFC 8310's strict profile, and failing to establish TLS on 853 is a hard error.

So a resolver living on this PC means "PC off" equals "phone has no internet",
not merely "no filtering". That is disqualifying for a daily driver, and it
disqualifies the whole home-hosted delivery path regardless of how well it
works while the machine is up -- which it does; it was verified end to end.

DNS_TRUSTED_DOT_HOST/IPS go back to empty, which restores the previous enforcer
behaviour byte for byte. No code revert is needed, which is exactly why the
flag was built to default empty.

Two things found while testing are worth keeping. The nftables input chain is
policy drop and admitted only ssh over wg0, so binding stunnel to the tunnel
address was not sufficient on its own: ICMP passed while TCP 853 was dropped,
which presents confusingly as "ping works but the port does not". That rule is
now added explicitly and scoped to wg0. And setup_phone_wireguard.sh automates
the client setup the tunnel needed, verifying handshake, reachability and DNS
rather than assuming success, and deleting the pushed private key afterwards.

The deeper reason the home endpoint could not work even with the tunnel up:
dns.kuhy.duckdns.org resolves to the public IP while stunnel listens only on
10.8.0.1, and with AllowedIPs=10.8.0.0/24 that routes outside the tunnel to a
closed port. Android never opened a connection at all. Split-horizon DNS does
not fix it either, since on mobile data the phone uses the carrier's resolver.

Research also ruled out the hosted-hybrid option that looked most attractive:
no provider can ingest a 185k-domain list (NextDNS none, AdGuard 1-5K, ControlD
10K), and the free tiers fail OPEN -- they stop filtering past 300k queries a
month while still resolving, which for a self-control tool is the worst failure
mode available. Details and the remaining options are in the parked doc.

The stunnel endpoint is left running deliberately: WireGuard-only, verified
unreachable from LAN and WAN, and it makes the next attempt testable
immediately. Removal commands are documented.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AwepyL5Lxs5QKbKkMpxxxL
2026-08-05 10:05:16 +02:00
.github Pin prettier, shfmt and zsh too, not just shellcheck 2026-08-04 21:07:49 +02:00
.hippo style: prettier format .hippo memory files 2026-05-28 07:05:24 +02:00
.vscode chore: archive 41 unmaintained directories to testsAndMisc-archive 2026-05-14 20:21:05 +02:00
billsplit billsplit: build a real APK by dropping file_picker for file_selector 2026-08-03 14:15:40 +02:00
bucket_catch bucket_catch: introduce a real design-token system, fix reversed gradients 2026-07-22 19:18:12 +02:00
docs Park phone DNS filtering: Private DNS fails closed, so the PC cannot host it 2026-08-05 10:05:16 +02:00
focus_owner Exempt the generated policy asset from prettier 2026-08-05 09:40:44 +02:00
kcd2_dice_solver kcd2 dice solver: lock deploy_build.sh so two runs cannot publish half a bundle 2026-07-26 20:33:38 +02:00
linux_configuration Park phone DNS filtering: Private DNS fails closed, so the PC cannot host it 2026-08-05 10:05:16 +02:00
meta Fail the build on any shellcheck finding; fix the 222 the old gate hid 2026-08-03 19:49:11 +02:00
phone_focus_mode Park phone DNS filtering: Private DNS fails closed, so the PC cannot host it 2026-08-05 10:05:16 +02:00
python_pkg Serve the blocklist over DoT and hand the policy to the app as an asset 2026-08-05 09:36:11 +02:00
reverse_survivors feat(reverse_survivors): migrate Reverse Survivors game into the monorepo 2026-08-03 10:45:12 +02:00
third_party/agent-skills style(prettier): apply markdown/json formatting updates 2026-05-07 22:08:00 +02:00
.binary-allowlist Move billsplit Flutter app into the monorepo 2026-08-03 12:22:22 +02:00
.copilotignore chore: archive 41 unmaintained directories to testsAndMisc-archive 2026-05-14 20:21:05 +02:00
.fvmrc chore: consolidate root configs into meta/, drop unused C dir + split/pdfCentered/geo_data 2026-05-14 20:40:12 +02:00
.gitignore Move billsplit Flutter app into the monorepo 2026-08-03 12:22:22 +02:00
.pre-commit-config.yaml mtk_root: build the rooting toolkit before the phone lands 2026-08-04 20:38:44 +02:00
.prettierignore Exempt the generated policy asset from prettier 2026-08-05 09:40:44 +02:00
.shellcheckrc Fail the build on any shellcheck finding; fix the 222 the old gate hid 2026-08-03 19:49:11 +02:00
CLAUDE.md Move billsplit Flutter app into the monorepo 2026-08-03 12:22:22 +02:00
DESIGN_AUDIT_TODO.md Format last three markdown files; cap billsplit's Android build memory 2026-08-03 13:25:48 +02:00
lint_python.sh chore: consolidate root configs into meta/, drop unused C dir + split/pdfCentered/geo_data 2026-05-14 20:40:12 +02:00
pyproject.toml chore: consolidate root configs into meta/, drop unused C dir + split/pdfCentered/geo_data 2026-05-14 20:40:12 +02:00
README.md Move billsplit Flutter app into the monorepo 2026-08-03 12:22:22 +02:00
requirements.txt chore: consolidate root configs into meta/, drop unused C dir + split/pdfCentered/geo_data 2026-05-14 20:40:12 +02:00
run.sh chore: consolidate root configs into meta/, drop unused C dir + split/pdfCentered/geo_data 2026-05-14 20:40:12 +02:00

testsAndMisc

A collection of personal projects, scripts, and experiments — from a GPS-based phone focus tool to Linux/Arch automation, with CI, linting, and pre-commit hooks across the board.

Highlights

Phone Focus Mode

Location-based app restriction for rooted Android. Automatically disables non-whitelisted apps within 500 m of home using ADB + Magisk. Features Haversine distance calculation, hysteresis to prevent toggling, fail-safe unlock, and state persistence. Bash, Android ADB.

Linux Configuration

Automated Arch Linux setup: fresh-install scripts, i3 window manager config, LaTeX environment, and system tests. Includes documentation and test result logging.

Scripts

Utility scripts for development workflows — build file validation, secret detection, and custom makepkg helpers.

Repository Layout

Path Description
python_pkg/ Python packages (each maintained subpackage lives here)
billsplit/ Receipt bill-splitting Flutter app — people, groups, per-item assignment, e-paragon import and xlsx export (Dart, 100 % line coverage gate)
linux_configuration/ Arch Linux setup, i3 config, system maintenance scripts
phone_focus_mode/ GPS-based Android focus enforcer
reverse_survivors/ Reverse Survivors — React/Vite game where you play the horde against an AI survivor (TypeScript, 100 % coverage gate)
scripts/ Workspace-level helper scripts and pre-commit hooks
docs/ Reference docs and historical reports
third_party/ Vendored upstream skills/agents
meta/ Repo-wide tooling: pyproject.toml, requirements.txt, .pre-commit-config.yaml, run.sh, lint_python.sh, .fvmrc. Symlinked into the repo root so tools that auto-discover from root keep working.

Archived / unmaintained projects live in the sibling repository testsAndMisc-archive.

Tooling

  • Python linting: Ruff with all rules enabled (see meta/pyproject.toml)
  • Dependencies: pip install -r meta/requirements.txt (combined runtime + dev)
  • CI: GitHub Actions — lint, build, and test on push
  • Testing: pytest (Python), custom shell-based test harness for scripts