gate

A general quality-check workflow for requirements, specifications, plans, implementations, pull requests, and other change records. It identifies the artifact, checks it against relevant criteria, and reports the result.

In plain words
What is it for?
Verify whether a document or code change meets its criteria and is complete enough for the next stage.
Why use it?
It provides a consistent review before work moves between stages or is declared complete.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/orin-dx/agent-plugins/gate
Any agent
npx skills add orin-dx/agent-plugins --skill gate
Clone the repo
git clone --depth 1 https://github.com/orin-dx/agent-plugins

Made for: Claude Code, Codex.

Per session 143 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 716 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00143 $0.00716
Opus 5 $0.00072 $0.00358
Sonnet 5 $0.00029 $0.00143
Haiku 4.5 $0.00014 $0.00072

Measured 2d ago against content hash a74afa941db9, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

gate 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 2d 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.

plugins/sentinel/skills/gate/SKILL.md · 59 lines

What it actually says

Sentinel Gate Skill


<when_to_activate>

Activate on any of these signals:

  • Explicit gate request: "verify", "gate", "is this done?", "does this meet criteria?", "quality check"
  • Stage transition: about to start implementation → gate the spec; about to open PR → gate the implementation
  • Artifact type matches: requirement, spec, plan, implementation, PR

Do not activate for: general code questions, exploratory research, or authoring tasks where no artifact boundary is being crossed.

</when_to_activate>


<three_stage_flow>

One skill, one three-agent pipeline, reused against whatever artifact type it's handed — requirement, spec, plan, implementation, PR, changeset, finding-report. recon's job is exactly to work out what it's looking at and what criteria apply, so the same chain runs unchanged regardless of artifact type — there is no separate sub-skill or agent set per type.

Stage Agent Model Effort Responsibility
1 — Recon recon haiku low Inventory the artifact: type, location, criteria list, source files to read. No judgment.
2 — Verify verifier sonnet medium Cross-reference each criterion against the source files. Classify as verified, failed, or unverifiable. Neutral — reports evidence only.
3 — Exit Gate exit-gate opus high Produce the final verdict. Pass only if all criteria are verified with no unresolved failures. On fail, return specific actionable blockers.

</three_stage_flow>


<axiom_protocol>

The protocol input is: artifact_type, artifact_path, criteria (explicit or derived from linked spec).

The protocol output is a verdict@1 object: pass or fail, with blockers on failure and a verdict_summary for the orchestrator.

Retry behavior: Up to 3 retries. On each failure, the specific blockers are returned to the producing agent. At retry 3, escalate to the caller — do not loop indefinitely. Track retry_count in the verdict.

</axiom_protocol>


<framework_references>

Changes

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.

  1. 2d ago First seen · 59 lines · 143 tokens per session scan A a74afa941db9

Subscribe to this mod's changes

gate is a skill published in the GitHub repository orin-dx/agent-plugins (1 stars, last pushed 5d ago), licensed MIT. It adds 143 tokens to every session and 716 once invoked, about $0.0007 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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