What is brandapp-sdk-review?

A review workflow for projects that use the reopt Brandapp SDK for sign-in, custom data fields, subscription checkout, files, and webhooks. A webhook is a server-to-server message sent when an event occurs.

Use it to audit an existing @reopt-ai/brandapp-sdk integration and check its Auth, EAV, Plans, Files, and webhook code for known anti-patterns.

It helps identify unsafe or outdated SDK usage, including version mismatches and mistakes in authentication, payments, file handling, or event processing.

brandapp-sdk-review — Skill for Claude Code and Codex by reopt-ai

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.

Any agent

npx skills add reopt-ai/reopt-skills --skill brandapp-sdk-review

Clone the repo

git clone --depth 1 https://github.com/reopt-ai/reopt-skills

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/reopt-ai/reopt-skills/brandapp-sdk-review/github.svg)](https://agentmods.dev/skills/reopt-ai/reopt-skills/brandapp-sdk-review)

Your own site

<a href="https://agentmods.dev/skills/reopt-ai/reopt-skills/brandapp-sdk-review"><img src="https://agentmods.dev/badge/skills/reopt-ai/reopt-skills/brandapp-sdk-review/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/reopt-ai/reopt-skills/brandapp-sdk-review"><img src="https://agentmods.dev/badge/skills/reopt-ai/reopt-skills/brandapp-sdk-review.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 92 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,867 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00092	$0.03867
Opus 5	$0.00046	$0.01934
Sonnet 5	$0.00018	$0.00773
Haiku 4.5	$0.00009	$0.00387

Measured 7d ago against content hash bb3188f2c51f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

brandapp-sdk-review scanned grade A with 1 finding 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 7d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- **F2 Unsafe preview or domain-error handling** — `fetch(file.url).text()` instead of `readContent`, or upload/delete/folder mutations without `STORAGE_LIMIT` / `FILE_IN_USE` / `FOLDER_NOT_EMPTY` branches

skills/brandapp-sdk-review/SKILL.md · 126 lines

How it starts

The opening of the file, as written. The whole thing — 126 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Brandapp SDK Review

This is NOT the SDK you know. Read node_modules/@reopt-ai/brandapp-sdk/docs/ before judging any usage (the package ships docs at top-level docs/, not dist/docs/). Anti-pattern remedies live there; this skill is grep keys + categories only. Two surfaces are not in docs/: Better Auth wiring lives in the package README.md, and 3.1–4.0 breaking detail lives in CHANGELOG.md (migration.md stops at 2.x → 3.0.0).

Step 1 — Pin agent rules into AGENTS.md / CLAUDE.md

Source: the module's own agent-rules file once it ships one (@reopt-ai/brandapp-sdk does not, as of 4.2.0). Fallback: agent-rules.md bundled with this skill. Wrap the source between  and .

Markers are shared with brandapp-sdk-install — same module, one block. If the block already exists from install, leave it alone (replace only when stale).

Step 2 — Version gate

Inspect the installed version with grep '"@reopt-ai/brandapp-sdk"' package.json.

Also read the installed better-auth version — 4.0 and 1.7 move together.

< 4.2.0 — no record version / ifVersion, increments, or expiresAt, and no 422 QUERY_TOO_BROAD (broad filters were silently truncated). P10–P12 below assume 4.2; below it, flag the hand-rolled pattern and recommend the bump. < 4.1.0 also has no sdk.analytics / startBrandappAnalytics.
>= 4.0.0 — Better Auth 1.7 wiring is mandatory. better-auth < 1.7.1 in package.json is a broken install. Run Auth5/Auth8; the 1.6 client plugin, signIn.oauth2, and the /api/auth/oauth2/callback/reopt path no longer exist.
< 4.0.0 — the app is on the 1.6 flow. Before recommending the bump, check that any self-registered redirect URI has ${BETTER_AUTH_URL}/api/auth/callback/reopt added in the studio (exact match) — upgrading first breaks sign-in. Then Auth8 lists the call-site rewrites.
< 3.6.0 — no EAV record-list select projection (wide list views must fetch all values; recommend 3.6 before applying Perf2); < 3.5.0 also has no Files folders, rename/move, readContent, usage, or matching React hooks (recommend 3.5 for file-manager work).
< 3.4.0 — no subscription lifecycle webhooks, live Paddle hosted checkout/unified live cancellation result, or two-way feedback; < 3.1.0 has no plans hosted checkout at all (createCheckout / getCheckout / cancel). For any subscription / checkout UI recommend 3.4+ and run Err5/W3.
< 3.2.0 — no OIDC Single Logout. Flag hand-rolled token verification / end-session redirects; recommend 3.2+ (3.3 adds reliable request IDs + retryable 503 infrastructure failures).
< 3.0.0 — webhook contract differs from the live platform sender: 2.x verifySignature(body, sig, secret) + record.* event handlers silently 401-reject / never fire in prod. Browser clientSecret was allowed (now throws CONFIG_BROWSER_SECRET). ReoptAdapterConfig / ReoptEavConfig / ReoptAdapterError aliases still exist (removed in 3.0). Bump to 3.0 and run the W / Cfg patterns below.
< 2.3.0 — AI errors are not unified, model metadata is incomplete, and < 2.2.0 also retries mutations by default, treats AI timeout as wall-clock, backfills per record, and lacks QUERY_TOO_LARGE. < 2.0.0 predates the env-var rename (no aliases) and incrementally lacks the service token, schema drift, host split, narrowed EAV errors, and 4xx classes — migrate .env + bump first; every pattern below assumes 2.0+.

Read the full file on GitHub · 126 lines

Files

What ships with it

3 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.

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.

7d ago Changed · +5 lines · +13 tokens per session bb3188f2c51f
12d ago First seen · 121 lines · 79 tokens per session scan A a0b5341d0bbe

Subscribe to this mod's changes

brandapp-sdk-review is a skill published in the GitHub repository reopt-ai/reopt-skills (1 stars, last pushed 7d ago), licensed MIT. It adds 92 tokens to every session and 3,867 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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