* fix(flows): reject corrupt step paths at deploy + atomic cache writes (#9751) A flow step could execute an unrelated (and in the reported case, destructive) script at runtime even though every stored definition looked correct. A forensic dump traced it to two issues: - Deploy accepted absolute/local step paths. `wmill sync push` from a feature- branch checkout under /tmp baked an absolute path (`/tmp/.../ops/scripts/clean_device/...`) into a step's `value.path`. Persisted verbatim, it mis-resolved to an unrelated script at runtime. - The on-disk cache write was neither truncating nor atomic. `FsBackedCache::put` used `write+create`, so a shorter overwrite left stale trailing bytes and concurrent writers could interleave into a torn file — a corrupt cached blob that a worker then scheduled from. Fixes: - Reject non-workspace flow step paths (must be u/, f/, g/ or hub/) in `validate_flow_value` (covers create_flow + update_flow, recursively through loops/branches/AI-agent tools) and early in the CLI `pushFlow`. - Make `FsBackedCache::put` write a unique temp file (truncate + fsync) then atomically rename it over the target, cleaning up on error. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * fix(flows): validate failure/preprocessor module paths + sub-flow paths in CLI Address PR review (cubic + claude): - Backend `validate_flow_value` is the authoritative guard but only walked `modules`; extend it to also validate `failure_module` and `preprocessor_module` (which can themselves be sub-flows/loops/branches), so an absolute path there can't be persisted. - CLI preflight only collected `type: "script"` paths; now collects sub-flow (`type: "flow"`) step paths too (recursively, incl. failure/preprocessor), so the comment's claim matches the behavior. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * fix(cli): include AI-agent tool step paths in flow path preflight Address Codex review: collectStepPaths skipped aiagent tools, so a bad path in a tool fell through to the API error instead of the local fail-fast. The backend already validates these (traverse_modules walks AIAgent tools); this aligns the CLI early-error with it. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * test(flows): make failure/preprocessor path test key explicit The test used `slot:` as a json! key. json! does interpolate an ident key to its variable's value (json!({slot:1}) with slot="failure_module" => {"failure_module":1}), so the test was correct and exercised the validation — but the behavior is subtle, so build the key explicitly via serde_json::Map to remove ambiguity (review nit). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * fix(cache): use a UUID temp name for atomic put (shared-volume safe) Address Codex (P1): pid+counter temp names collide across container PID namespaces on a shared cache volume (same pid, PUT_SEQ resets to 0 per process), so two workers could truncate/clobber the same temp file before rename. Use a random UUID suffix (matching worker.rs's atomic-write helpers) — globally unique, so the cross-process temp-file hazard is closed. Also trims the comment to the AGENTS.md <=4-line limit (Pi nit). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Windmill CLI
A simple CLI allowing interactions with windmill from the command line.

You can find more information in Windmill Docs
Installation
Install the wmill CLI tool using npm install -g windmill-cli.
Update to the latest version using wmill upgrade.
Workspaces
To get started run wmill workspace add or use the instructions from the
workspace settings.
Running Flows & Scripts
Run a script or flow using wmill flow/script run u/username/path/to/script and
pass any inputs using --data + Inputs specified as a JSON string or a file
using @ <filename> or stdin using @-.
Curl-style syntax using -d @- for stdin or -d @<filename> is also supported.
Flow Steps and Logs will be streamed during execution automatically.
Pushing Resources, Scripts & More
The CLI can push specifications to a windmill instance. See the examples/ folder for formats.
Switch to a different workspace
wmill workspace switch <workspace_name>
Sync a workspace
Pull
wmill sync pull
Push
wmill sync push
We recommend using the --yaml option to use yaml instead of json as the encoding format. Yaml will be made the default soon.
Pushing individual files
You can push individual resources using
wmill <type> push <file_name> \<remote_name\>. This does not require a special
folder layout or file name, as this is given at runtime.
Listing
All commands support listing by just not providing a subcommand, ie
wmill script will result in a list of scripts. Some allow additional options,
learn about this by specifying --help.
User Management
You can add & remove users via wmill user add/remove, and list them using
wmill user
Pulling
You can pull the entire workspace using wmill pull
Completion
The CLI comes with completions out of the box via wmill completions <shell>.
(Via cliffy)
Bash
To enable bash completions add the following line to your ~/.bashrc:
source <(wmill completions bash)
Fish
To enable fish completions add the following line to your
~/.config/fish/config.fish:
source (wmill completions fish | psub)
Zsh
To enable zsh completions add the following line to your ~/.zshrc:
source <(wmill completions zsh)
Development
AI Guidance Variants
wmill init can now materialize alternate AI guidance bundles without changing
the generated defaults in the repo, but this is exposed as internal env-var
overrides rather than public CLI flags.
Examples:
WMILL_INIT_AI_SKILLS_SOURCE=/path/to/custom/skills wmill init --use-default
WMILL_INIT_AI_SKILLS_SOURCE=/path/to/custom/skills WMILL_INIT_AI_AGENTS_SOURCE=/path/to/AGENTS.md wmill init --use-default
WMILL_INIT_AI_SKILLS_SOURCE=/path/to/custom/skills WMILL_INIT_AI_CLAUDE_SOURCE=/path/to/CLAUDE.md wmill init --use-default
This is the same guidance-writing path used by the benchmark CLI under
ai_evals/, so the benchmark harness and wmill init now generate the same
project guidance shape:
AGENTS.mdCLAUDE.md.agents/skills/*.claude/skills/*
Testing with a local windmill-yaml-validator
To test local changes to the validator before publishing, use npm link:
# In windmill-yaml-validator/
npm run build
npm link
# In cli/
npm link windmill-yaml-validator
Running Tests
Prerequisites:
- PostgreSQL running locally (default:
postgres://postgres:changeme@localhost:5432) - Rust toolchain installed
Run tests locally (full features):
bun test test/
Run tests in CI mode (minimal features, skips EE tests):
CI_MINIMAL_FEATURES=true bun test test/
| Variable | Description |
|---|---|
CI_MINIMAL_FEATURES |
Set to true to skip EE-dependent tests |
DATABASE_URL |
PostgreSQL connection string |
EE_LICENSE_KEY |
Enterprise license key for EE features |
