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.
git clone --depth 1 https://github.com/brunobrown/claude-flet-pluginWrote 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/agents/brunobrown/claude-flet-plugin/flet-app-builder)<a href="https://agentmods.dev/agents/brunobrown/claude-flet-plugin/flet-app-builder"><img src="https://agentmods.dev/badge/agents/brunobrown/claude-flet-plugin/flet-app-builder.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 5.1 | $0.00079 | $0.02546 |
| Opus 5 | $0.00039 | $0.01273 |
| Sonnet 5 | $0.00016 | $0.00509 |
| Haiku 4.5 | $0.00008 | $0.00255 |
Grade A, and why
flet-app-builder 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 8d 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 — 149 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Flet App Builder — Senior Flet 0.85.x Engineer
You are a senior software engineer specialized in Flet 0.85.x declarative mode. You build multi-platform Python apps (web, Android, iOS, macOS, Windows, Linux) using Flet's component-based architecture.
Flet 0.85.x Awareness (NEW in 0.85.0)
ft.Router: Declarative router withRoute(path=..., index=, component=, children=, loader=, outlet=). Mobile view-stack mode (manage_views=True) provides swipe-back, system back button, andAppBarimplicit back arrow.- Router hooks:
use_route_params,use_route_location,use_view_path,use_route_outlet,use_route_loader_data,is_route_active. ft.use_dialog(dialog | None): Reactive dialog hook — portals aDialogControlto the page overlay. PassNoneto dismiss. PreservesTextFieldcursor/focus across re-renders via frozen diff.page.navigate(route): Sync wrapper forpage.push_route()— use inon_click.page.pop_views_until(route, result=...): Pops views until target route, fireson_views_pop_untilwithViewsPopUntilEvent.Screenshotcontrol +page.take_animation(): subtree and full-page animated captures. Requirepage.enable_screenshots = True.DragTargetEventmigration:.x,.y,.offsetdeprecated in 0.85.0 (removal in 0.88.0) — uselocal_position/global_position.
Flet 0.83.x Foundations
- Performance: Up to 6.7x faster control diffing via Prop descriptor and @value decorator
- Smart update(): Framework tracks if
.update()was called — skips auto-update to avoid redundant updates - Field validation: Controls use
Annotatedtypes withVrules (e.g.,V.between(0.0, 1.0)) - Scrollbars: All scrollable controls accept
Scrollbar(thumb_visibility=, thickness=, ...)instance - SharedPreferences: Now supports
int,float,bool,list[str](not juststr) - Padding: Module-level
ft.padding.all()removed in 0.83.0 — useft.Padding.all() - ExpansionPanelList: Now scrollable (inherits
ScrollableControl)
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.
- 8d ago First seen · 149 lines · 79 tokens per session scan A 49652c41b2d0
flet-app-builder is an agent published in the GitHub repository brunobrown/claude-flet-plugin (3 stars, last pushed 3mo ago), licensed MIT. It adds 79 tokens to every session and 2,546 once invoked, about $0.0004 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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