HyoDo
Local AI agent guardrails for FDE work and CI — audit evidence, policy DENY, fail-closed quality gates.
Not a pre-commit clone. HyoDo helps Forward Deployed Engineers and AI-assisted teams prove what ran, block unauthorized tools, and absorb your existing tests/linters without replacing them.
Review signals never grant automatic approval. Unobserved is never green.
Why HyoDo (vs pre-commit alone)
| Need | HyoDo |
|---|---|
| Agent step audit trail | event record → .hyodo/agent-events.jsonl |
| Tool / path / step policy | policy check (ALLOW / DENY; missing = exit 2) |
| Keep existing CI tools | BYOG init absorbs pytest/ruff/npm/go/… |
| Fake-green resistance | fail-closed score + SKIP ≠ PASS |
| Air-gapped / on-prem | loopback dashboard, offline-safe design |
pre-commit + ruff is still excellent for hooks. HyoDo adds agent
evidence + policy gates + honest measurement for FDE deployment defense.
Start here (any repository)
pipx install hyodo
cd your-project
hyodo safe # early-warning scan, no setup
hyodo safe --strict # exit 1 on high-severity findings
hyodo safe --json # machine-readable findings for CI
# GitHub Actions
- run: pipx install hyodo
- run: hyodo safe --strict --json
hyodo safe is an early-warning scanner, not a full security audit.
Bring your own gates (optional)
hyodo init # detect tools → write .hyodo/gates.toml
hyodo check # run absorbed gates
hyodo dashboard --open # local evidence panel (127.0.0.1)
init reads tooling you already own (pytest/ruff/mypy/pyright,
npm scripts, go.mod, Cargo.toml, Makefile targets). It does not
reinvent them. Empty detection → commented starter (no guessing).
Malformed or zero executed gates → exit 2 (not a pass).
Agent evidence spine (opt-in FDE)
hyodo event validate --file step.json
hyodo event record --file step.json --root . --policy .hyodo/policy.toml
hyodo policy check --file step.json --config .hyodo/policy.toml
hyodo schema check --schema agent.schema.json --payload step.json --json
Default storage is digest-only. DENY is recorded for audit; the
caller must stop the agent — HyoDo is a gate, not a runtime
interceptor. Examples: examples/fde-evidence-spine/.
schema check validates a local JSON payload deterministically. It returns
0 for valid, 1 for a schema violation, and 2 when the schema or payload
cannot be observed or trusted. --json emits structured reasons for tools.
Optional local MCP stdio
pip install 'hyodo[mcp]'
hyodo mcp stdio --root .
This starts a local standard-input/output MCP process only. It wraps the
existing safe, check, event record, and policy check CLI contracts
for the configured host workspace. It does not open a network listener or
give a client access to files outside that workspace.
Optional private-network MCP
hyodo mcp serve --bind tailscale --bind-ip 100.99.88.77 \
--token "$HYODO_MCP_TOKEN" --root .
This explicit connector binds only to the supplied Tailscale 100.64.0.0/10
address and requires a non-empty bearer token before it listens. It serves the
host workspace only; a second device must be on the same private network and
does not gain access to its own unrelated files. Public listeners are not
supported.
Engineering map (branding kept, terms first)
| DevSecOps label | Pillar | Measured by |
|---|---|---|
| Static types | Truth (眞 / 진) | Command gate (typechecker) |
| Tests + safety | Goodness (善 / 선) | Tests + safe |
| Lint / format | Beauty (美 / 미) | Command gate (linter) |
| Public surface | Benevolence (仁 / 인) | Native AST scan |
| Data privacy | Hyo (孝 / 효) | Native consent/data scan |
| Audit trail | Yeong (永 / 영) | .hyodo/history.jsonl |
Command gates are absorbed tools. AST / ledger pillars are never
shell-faked. Missing sources show Not measured. Fail-closed geometric
mean (HYOGOOK V5 formula, philosophy V6 labels): any pillar at 0
collapses the review signal. Detail: PHILOSOPHY.md.
Local instrument panel
hyodo dashboard --open
# → http://127.0.0.1:8768
Loopback only; 15s poll of /api/evidence; no composite invention.
Measure again now is token-protected.
Install
Python 3.10+. pip install -U hyodo or pipx install hyodo.
See Quick Start.
Commands
| Command | Purpose |
|---|---|
hyodo safe |
Safety findings (early warning) |
hyodo init |
Write .hyodo/gates.toml (BYOG) |
hyodo check |
Absorbed gates or checkout preset |
hyodo event … |
Agent event validate / record |
hyodo policy check |
Agent policy ALLOW / DENY |
hyodo schema / eval / report |
Local validation, eval, evidence report |
hyodo mcp stdio |
Optional local MCP CLI adapter |
hyodo mcp serve |
Explicit loopback or authenticated Tailscale MCP adapter |
hyodo score … |
Optional review signal |
hyodo dashboard |
Local evidence panel |
safe: 0 findings · 1 high+--strict · 2 bad path.
check: 0 all executed PASS · 1 FAIL · 2 none/malformed.
event/policy: 0 ok/ALLOW · 1 invalid/DENY · 2 unobserved.
schema check: 0 valid · 1 validation error · 2 unobserved input.
Scope
| Surface | Status |
|---|---|
hyodo/ package and CLI |
Public release surface |
tests/ and CI workflows |
Release verification |
Model-agnostic ≠ language-agnostic. Export PDF audit packs and full runtime interceptors are roadmap items — not claimed shipped.
For contributors
git clone https://github.com/lofibrainwav/HyoDo.git && cd HyoDo
python -m venv .venv && source .venv/bin/activate
python -m pip install -e ".[dev]" && ./.venv/bin/hyodo check
Documentation
License
HyoDo is available under the MIT License.
1 maintainer
Release files for hyodo 4.8.1
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
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| hyodo-4.8.1.tar.gz | 118.2 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| hyodo-4.8.1-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 186.5 kB
Release files / hyodo-4.8.1.tar.gz
| Download URL | hyodo-4.8.1.tar.gz |
|---|---|
| Size | 118.2 kB |
| Tags | Source |
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| Tags | Python 3 |
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| Uploaded via |
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