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.
npx agentmods add skills/uselessspace/freedeepagents-activity-builder/activity-classifiernpx skills add uselessspace/freedeepagents-activity-builder --skill activity-classifiergit clone --depth 1 https://github.com/uselessspace/freedeepagents-activity-builderWrote 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/uselessspace/freedeepagents-activity-builder/activity-classifier)<a href="https://agentmods.dev/skills/uselessspace/freedeepagents-activity-builder/activity-classifier"><img src="https://agentmods.dev/badge/skills/uselessspace/freedeepagents-activity-builder/activity-classifier.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 | $0.00079 | $0.01095 |
| Opus 5 | $0.00039 | $0.00548 |
| Sonnet 5 | $0.00016 | $0.00219 |
| Haiku 4.5 | $0.00008 | $0.00110 |
Grade A, and why
activity-classifier 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 3d 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 — 120 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Activity Classifier
何时用：Brief 已写好、要定技术形态时 → 产出 Classification 后交
/activity-builder。
Read the Activity Brief and produce a fixed classification before build work.
Axes
frontend_axis:
card-onlywhen generic cards, forms, files, and artifacts are enough.static-previewwhen the user needs a persistent rich view, canvas, dashboard, game-like interaction, timeline, graph, pet/avatar, map, or other specialized UI.
tool_axis:
runtime-onlywhen card-system, typed-KV, and declared runtime capabilities are sufficient.activity-toolswhen domain operations, third-party APIs, deterministic SPA writes, indexes, or private business logic needtools.py/handlers.py.
runtime_capabilities is an additive list drawn only from:
image_generate, image_edit, tts_generate, read_document, asr.
An empty list means no opt-in runtime tool.
image_axis:
nonefor text/cards/artifacts only.generate-onlyfor fresh images.generate+edit-lockedwhen user/reference images must stay visually locked across edits.
navigation_axis:
nonewhen the Agent never needs to move the user's open preview.agent-to-previewwhen a successful Agent read/action should select an activity-private route, view, or business object in the current Static Preview. It must not encode browser clicks, focus, scrolling, or DOM targets.
spa_interaction_axis (Static Preview only):
nonefor read-only DSL views.handlersfor deterministic reads/writes that do not need an Agent.agent-turnsfor structured actions requiring model understanding, Skills, planning, or multiple tools.mixedwhen both classes of interaction exist. Directapi/asrremains a platform endpoint, not an Agent turn.
runtime_mode is derived from frontend_axis, not chosen independently:
card-only → Card-only, static-preview → Static Preview.
data_mode:
nonewhen the activity has no durable business state.sqlite(default) for growing/queryable/transactional records.typed-kvfor small bounded Prompt-aware state.hybridfor a typed-KV digest plus SQLite/sidecar corpus or index.
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.
- 3d ago First seen · 120 lines · 79 tokens per session scan A bccfee8508b7
activity-classifier is a skill published in the GitHub repository uselessspace/freedeepagents-activity-builder (2 stars, last pushed 16d ago), licensed MIT. It adds 79 tokens to every session and 1,095 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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