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 skills/josix/agent-flow/verification-gatesnpx skills add josix/agent-flow --skill verification-gatesgit clone --depth 1 https://github.com/josix/agent-flowWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/josix/agent-flow/verification-gates)<a href="https://agentmods.dev/skills/josix/agent-flow/verification-gates"><img src="https://agentmods.dev/badge/skills/josix/agent-flow/verification-gates.svg" alt="Measured on agentmods" height="20"></a>What 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 | $0.00038 | $0.01613 |
| Opus 5 | $0.00019 | $0.00807 |
| Sonnet 5 | $0.00008 | $0.00323 |
| Haiku 4.5 | $0.00004 | $0.00161 |
Grade A, and why
verification-gates 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 4d ago.
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 — 236 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Verification Gates
Overview
Verification gates are mandatory quality checkpoints that must pass before any implementation work is considered complete. These gates prevent broken code from being committed, ensure type safety, maintain code style consistency, and validate that all tests pass.
Owner Agent: Alphonse (Verifier Agent)
Key Principles
- Non-Negotiable Quality: Every code change must pass all applicable gates
- Automated Enforcement: Gates are triggered automatically via hooks
- Clear Feedback: Failures provide actionable error messages
- Project-Aware: Commands adapt to detected project type and tooling
- Fail-Fast, Fix-First: When any gate fails, work stops until resolved
Verification Hierarchy
Loid (Executor) Alphonse (Verifier)
| |
Quick sanity tests Full verification gate
during implementation before completion
| |
+----------> Handoff >----+
Gate Types
Pre-Commit Gates
| Check | Example Command | Timeout |
|---|---|---|
| Lint | npm run lint / ruff check |
30s |
| Format | npm run format:check / black --check |
15s |
| Quick Tests | Changed file tests only | 60s |
Pre-Complete Gates
| Check | Example Command | Timeout |
|---|---|---|
| Full Test Suite | npm test / pytest |
300s |
| Type Checking | npx tsc --noEmit / mypy . |
120s |
| Linting | Full codebase lint | 60s |
| Build | npm run build / python -m build |
180s |
Security Gates
Triggered by changes to sensitive files or security-critical code:
| Check | Trigger | Action |
|---|---|---|
| Credential Scan | *.env, *secret*, *.key |
Block + Alert |
| Permission Check | Auth/ACL code | Require review |
| Dependency Audit | Package files | npm audit / pip-audit |
Verification Commands
Quick Reference by Language
| Action | Node.js | Python | Go | Rust |
|---|---|---|---|---|
| Test | npm test |
pytest |
go test ./... |
cargo test |
| Types | npx tsc --noEmit |
mypy . |
go build |
cargo check |
| Lint | npm run lint |
ruff check . |
golangci-lint run |
cargo clippy |
| Build | npm run build |
python -m build |
go build |
cargo build |
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 4d ago First seen · 236 lines · 38 tokens per session scan A aeaddc5119cf
verification-gates is a skill published in the GitHub repository josix/agent-flow (7 stars, last pushed 19d ago), licensed MIT. It adds 38 tokens to every session and 1,613 once invoked, about $0.0002 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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