Borrowing it
Nothing to install: this file belongs to mitchdenny/hex1b. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/mitchdenny/hex1b/main/.github/skills/api-reviewer/SKILL.mdgit clone --depth 1 https://github.com/mitchdenny/hex1bWrote 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/mitchdenny/hex1b/api-reviewer)<a href="https://agentmods.dev/skills/mitchdenny/hex1b/api-reviewer"><img src="https://agentmods.dev/badge/skills/mitchdenny/hex1b/api-reviewer/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/mitchdenny/hex1b/api-reviewer"><img src="https://agentmods.dev/badge/skills/mitchdenny/hex1b/api-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 5.1 | $0.00037 | $0.03584 |
| Opus 5.5 | $0.00015 | $0.01434 |
| Sonnet 5.5 | $0.00007 | $0.00717 |
| Haiku 4.5 | $0.00004 | $0.00358 |
Grade A, and why
api-reviewer 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 2mo 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 — 478 lines — stays where its author put it; the contents beside it link to each section on GitHub.
API Reviewer Skill
This skill captures API design preferences for the Hex1b codebase. Use it when reviewing public APIs, evaluating whether code should be public or internal, or assessing API design decisions made by AI agents.
Codebase Architecture
Hex1b is structured into distinct layers, each with different API design considerations:
Layer 1: Hex1bTerminal (Core)
The foundational layer maintaining an in-memory representation of terminal state.
| Component | Purpose | Accessibility |
|---|---|---|
Hex1bTerminal |
Core terminal state management | Public |
Hex1bTerminalBuilder |
Fluent terminal construction | Public |
| Presentation adapters | Output to real terminals, tests, web | Public interfaces |
| Workload adapters | Input/output abstraction | Public interfaces |
Surface, SurfaceCell |
Low-level cell storage | Public (low-level API) |
Design note: Hex1bTerminal emerged from the need to properly test TUI components. The adapter pattern enables use in real terminals, unit tests, or projecting state across networks.
Layer 2: Hex1bApp/TUI
The widget/node tree layer, inspired by React/Ink but not beholden to it.
| Component | Purpose | Accessibility |
|---|---|---|
Hex1bApp |
Root of TUI applications | Public |
*Widget records |
Declarative UI configuration | Public |
*Node classes |
DOM-like render elements | Generally public (for extensibility) |
| Reconciliation logic | Widget→Node synchronization | Internal |
| Layout algorithms | Measure/arrange implementation | Internal |
Layer 3: Automation
Testing and automation infrastructure.
| Component | Purpose | Accessibility |
|---|---|---|
Hex1bTerminalInputSequenceBuilder |
Fluent input automation | Public |
CellPatternSearcher |
Visual assertion matching | Public |
Hex1bTerminalSnapshot |
Captured terminal state | Public |
Design note: Automation APIs are explicitly for external consumers, not just internal testing.
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.
- 2mo ago First seen · 478 lines · 37 tokens per session scan A 95e22bb55d8b
api-reviewer is a skill published in the GitHub repository mitchdenny/hex1b (181 stars, last pushed today), licensed MIT. It adds 37 tokens to every session and 3,584 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-08-30.
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