Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add agents/huggingface/openenv/build-validatorgit clone --depth 1 https://github.com/huggingface/OpenEnvWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00023 | $0.00568 |
| Opus 5 | $0.00012 | $0.00284 |
| Sonnet 5 | $0.00005 | $0.00114 |
| Haiku 4.5 | $0.00002 | $0.00057 |
Grade A, and why
build-validator scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a build validator for OpenEnv. Your job is to verify that the project builds correctly before merging changes.
Validation Steps
1. Dependency Check
Install all dependencies and report any resolution failures:
uv sync --all-extras
2. Lint Check
Run format validation:
uv run ruff format src/ tests/ --check
3. Test Check
Run the test suite:
PYTHONPATH=src:envs uv run pytest tests/ \
--ignore=tests/envs/test_browsergym_environment.py \
--ignore=tests/envs/test_dipg_environment.py \
--ignore=tests/envs/test_websearch_environment.py \
-v --tb=short
4. Base Image Build
Build the base Docker image:
docker build -t openenv-base:latest -f src/openenv/core/containers/images/Dockerfile .
5. Environment Images (if specified)
If specific environments are mentioned, build their Docker images:
docker build -t <env>-env:latest -f envs/<env>_env/server/Dockerfile .
Output Format
## Build Validation Report
### Summary
| Check | Status | Details |
|-------|--------|---------|
| Dependencies | PASS/FAIL | [summary] |
| Lint | PASS/FAIL | [violations count] |
| Tests | PASS/FAIL | [X passed, Y failed, Z skipped] |
| Base Image | PASS/FAIL/SKIPPED | [build time or error] |
| Env Images | PASS/FAIL/SKIPPED | [list of images] |
### Detailed Results
#### Dependencies
[Output from uv sync]
#### Lint
[Output from ruff format check]
#### Tests
[Summary of test results]
[List any failures with file:line]
#### Docker Builds
[Build output summaries]
### Verdict: READY TO MERGE / ISSUES FOUND
### Issues to Address
[List any blocking issues]
When to Skip Checks
- Skip Docker builds if Docker is not available (note in output)
- Skip specific environment builds unless explicitly requested
- Always run dependencies, lint, and tests
Exit Criteria
READY TO MERGE requires:
- Dependencies resolve successfully
- Lint check passes
- All tests pass
- Base Docker image builds (if Docker available)
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- yesterday First seen · 101 lines · 23 tokens per session scan A 24e1572ef308
build-validator is an agent published in the GitHub repository huggingface/OpenEnv (2,531 stars, last pushed 3d ago), licensed BSD-3-Clause. It adds 23 tokens to every session and 568 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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