Borrowing it
Nothing to install: this file belongs to brunobrown/claude-flet-plugin. 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/brunobrown/claude-flet-plugin/main/.agents/skills/flet-app/SKILL.mdgit 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/skills/brunobrown/claude-flet-plugin/flet-app)<a href="https://agentmods.dev/skills/brunobrown/claude-flet-plugin/flet-app"><img src="https://agentmods.dev/badge/skills/brunobrown/claude-flet-plugin/flet-app/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/brunobrown/claude-flet-plugin/flet-app"><img src="https://agentmods.dev/badge/skills/brunobrown/claude-flet-plugin/flet-app.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00107 | $0.16234 |
| Opus 5 | $0.00053 | $0.08117 |
| Sonnet 5 | $0.00021 | $0.03247 |
| Haiku 4.5 | $0.00011 | $0.01623 |
Grade A, and why
flet-app 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 9d 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 — 2,297 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Flet App Development — Complete Reference
Flet 0.85.x | Declarative mode | Validated against real production apps and Flet 0.85.0 source
What's New in Flet 0.85.x
| Feature | Details |
|---|---|
ft.Router |
Declarative router with nested routes, layout outlets, dynamic/optional/splat segments, regex constraints, per-route data loaders, hooks (use_route_params, use_route_location, use_view_path, use_route_outlet, use_route_loader_data, is_route_active), and mobile view-stack mode (manage_views=True) with swipe-back, system back button, and implicit AppBar back arrow |
ft.use_dialog(dialog) |
Reactive dialog hook — portals a DialogControl to the page's dialog overlay. Pass None to dismiss. Preserves Flutter widget identity (e.g., TextField cursor) across re-renders via frozen diff |
page.navigate(route, **kwargs) |
Sync wrapper for page.push_route() — use in on_click and other sync callbacks where awaiting is impossible |
page.pop_views_until(route, result=None) |
Pops views from the navigation stack until a view with the given route. Result delivered via new on_views_pop_until (ViewsPopUntilEvent) |
page.take_animation(...) |
Captures animated PNG frame sequence in a single round-trip (no Python↔Flutter RPC latency between frames). Requires page.enable_screenshots = True |
Screenshot control |
New control with content + capture(pixel_ratio, delay) method for subtree screenshots |
DragTargetEvent migration |
.x, .y, .offset deprecated in 0.85.0 (removal in 0.88.0) — use local_position (target-relative) or global_position (global) |
Flet 0.83.x Foundations (still applicable)
| Feature | Details |
|---|---|
| 6.7x faster diffing | Prop descriptor tracks only modified properties; @value decorator enables content-based comparison for ~150 data types |
| Smart update() | Framework tracks explicit .update() calls during handlers — skips auto-update to avoid redundant renders |
| Field validation | Annotated[type, V.rule()] for declarative field constraints (e.g., V.between(0, 1), V.ge(0), V.instance_of(...)) |
| Customizable scrollbars | Scrollbar(thumb_visibility=, track_visibility=, thickness=, radius=, interactive=, orientation=) on any scrollable control |
| Scrollable ExpansionPanelList | Now inherits ScrollableControl — supports scroll, auto_scroll, on_scroll, scroll_to() |
| SharedPreferences expanded | Now supports int, float, bool, list[str] (not just str) |
| Padding functions removed | ft.padding.all() / .symmetric() / .only() removed — use ft.Padding.all() class methods |
| Desktop packaging | Desktop binaries moved from PyPI to GitHub Releases, cached at ~/.flet/client/ |
What ships with it
6 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.
- 9d ago First seen · 2,297 lines · 107 tokens per session scan A 0cf04b2adf96
flet-app is a skill published in the GitHub repository brunobrown/claude-flet-plugin (3 stars, last pushed 4mo ago), licensed MIT. It adds 107 tokens to every session and 16,234 once invoked, about $0.0005 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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