ci.yml writes MOD_VER=ci into config.env, and MOD_VER is anvil-core's PKG_VERSION. apk's version grammar wants a digit first, so mkpkg refused it -- with "info field 'version' has invalid value", naming neither the package nor the value nor where it came from. A free-form version was fine for .ipk, which is why the line survived the migration unread. MOD_VER=0 now. It is pinned rather than left to the date default so two runs of one tree produce the same bytes, and 0 says "not a release" as plainly as the word did while ordering below every real version. emit_apk checks the version before calling mkpkg and names the package, the offending value and the config.env setting to fix. The grammar test covers the recipes, and could not have caught this: the value comes from config.env, so anvil-core answers with whatever the machine running the test happens to say -- a date, locally, always valid. The new gate reads MOD_VER out of the workflow files themselves, which is the only place that value is written down, with a companion asserting a workflow still pins one at all so the check cannot pass by having nothing to check. busybox's pkg.conf expanded $BUSYBOX_BIN bare and let a failed sha256sum through a pipeline. Sourced under `set -euo pipefail` it therefore failed -- correctly skipping the recipe, since pkg_recipes evaluates PKG_WHEN in a subshell, but printing "BUSYBOX_BIN: unbound variable" twice into every CI log immediately above the first real failure, where it reads like the cause. With that fixed every recipe reads under the build's own flags, so the unsigned-recipe gate now covers all of them rather than only the ones a build would make: a recipe that cannot be read is dropped by that subshell rather than reported, so the failure mode is a package silently leaving the feed. Verified with the production key: 290 static, 135 replica, 47 signed packages and a payload. MOD_VER=ci reproduced locally against the new message, and MOD_VER=0 built and pruned clean. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_013rbKEyLXrzSE6wm3iNApVp
Reforge
Custom firmware for the FlashForge Creator 5 and Creator 5 Pro.
It installs the way a normal FlashForge update does: copy one file to a USB stick, plug it in, power the printer on. No jailbreak, no soldering, no opening the case, no ssh needed to get started — the printer's own updater does the work.
Packages are published on the Releases page — two files per release, one per model, marked pre-release while the mod is young. Help and support: the Discord.
Unofficial and unaffiliated with FlashForge. It voids your warranty and you are responsible for your machine. See Status for what has actually been tried on hardware before you flash anything.
Status
It runs on a real printer — a Creator 5 Pro, flashed and printing:
A checked box happened on that machine; an empty one has not, yet.
For everyone:
- Install and migration from stock firmware — the printer's own updater does it; your unit's factory calibration imports itself on the first boot
- Printing — gcode straight from the slicer, nothing edited
- Toolchanges — a current Klipper with real toolchanger support, in place of the 0.12-era tree FlashForge ships
- Nozzle-offset calibration
- Mainsail at
http://<printer-ip>/, with a current Moonraker behind it — anything that speaks the Klipper API works - Camera — mjpg-streamer, already on the printer; the mod just starts it
- Wifi
- HelixScreen on the printer's own screen
- Chamber heater
- Creator 5 (non-Pro) — its package builds and passes the same replica test suite, but has not touched hardware
- Going back to stock — proven on the printer replica, not yet needed on the machine. The stock package restores everything it carries; Moonraker is not in it, so the mod's build stays and keeps working — see Support
For the tinkerer:
- ssh as root — a random password is chosen on the first install
and written to
anvil-password.txton your stick; updates keep it (make passwdbakes in your own)
What you give up
FlashForge's application is one binary, and replacing it takes everything
that lived inside it: the network API on :8898, and with it FlashPrint,
Orca's FlashForge profile and the mobile app. Moonraker's API takes over.
Flashing the stock package brings them back.
If your prints already come out the way you want and you like the printer's own screen, this mod is not for you. It trades FlashForge's polish for Klipper's reach, and it expects you to be comfortable with a Klipper config and an ssh session when something breaks — Is this for you is the honest version of that question.
Get it
Creator 5 and Creator 5 Pro are not interchangeable. The printer refuses a package built for the other model — the most common reason a flash "does nothing". Yours is in Settings → About.
| Your printer | The file on the Releases page |
|---|---|
| Creator 5 | Creator5-anvil-<date>.tgz |
| Creator 5 Pro | Creator5Pro-anvil-<date>.tgz |
Download the stock FlashForge package for your model before you begin. It is the undo button: flashing it back puts the printer as it was.
Start here
| Is this for you | Who should flash this, who should stay on stock, and what it asks of you |
| Installing | The flash, the first boot, your root password |
| Your first print | The go/no-go checks, calibration, and the two verification files |
| Support | The logs, and the way back to stock |
The full manual is at
reforge.readthedocs.io. If you want the
insides — one file, firmwareExe, with the stock boot scripts, updater and
recovery path left untouched — How it works is under
For contributors.
Credits
Built on the work of others: ghzserg/FF publishes the stock packages and factory image everything here starts from; Mainsail, Moonraker and HelixScreen are shipped as released; the toolchanger status API follows viesturz/klipper-toolchanger so tool-aware UIs work unchanged.

