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 skills add ikenga-hq/ikenga-pkgs --skill studio-core-blocksgit clone --depth 1 https://github.com/ikenga-hq/ikenga-pkgsWrote 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/ikenga-hq/ikenga-pkgs/studio-core-blocks)<a href="https://agentmods.dev/skills/ikenga-hq/ikenga-pkgs/studio-core-blocks"><img src="https://agentmods.dev/badge/skills/ikenga-hq/ikenga-pkgs/studio-core-blocks/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/ikenga-hq/ikenga-pkgs/studio-core-blocks"><img src="https://agentmods.dev/badge/skills/ikenga-hq/ikenga-pkgs/studio-core-blocks.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 | $0.00048 | $0.00552 |
| Opus 5 | $0.00024 | $0.00276 |
| Sonnet 5 | $0.00010 | $0.00110 |
| Haiku 4.5 | $0.00005 | $0.00055 |
Grade A, and why
studio-core-blocks 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.
What it actually says
studio-core-blocks
The home for archetype-agnostic blocks. Anything that isn't specific to one archetype's narrative shape lives here.
What it ships
Under blocks/:
| Dir | Kind | Blocks |
|---|---|---|
transition/ |
transition (5) |
cut, fade, smash-cut, J-cut, L-cut |
sfx/ |
sfx (3) |
icon-pop, data-reveal, outro-resolve |
music/ |
music_preset (2) |
upbeat-tech, calm-narrative |
cta/ |
cta (3) |
link, subscribe, talk-to-us |
anchor/ |
anchor_pack (3) |
brand-pack, host-pack, location-pack |
sketch/ |
sketch (3) |
flowchart, timeline, wireframe |
That's 19 of the 36 library blocks. The remaining 17 are owned by archetype skills (hooks + narration in archetype-explainer, beats in archetype-product).
Templates
- All non-sketch core blocks ship
index.html(HyperFrames entry; G-39) with adata-durationscene and{{param}}placeholders. - Sketch blocks ship a minimal valid
.excalidrawscene (a few rectangles + text).BlockSchema.default_renderernow acceptsexcalidrawdirectly (WP-32/G-68); the shipped sketch blocks keep the olderdefault_renderer: 'auto'+metadata.renderer_hint: 'excalidraw'form, which stays valid against pre-G-68 schemas.
Discovery
The MCP catalog loader walks skills/*/blocks/**/block.json, so these blocks appear in block.list regardless of which archetypes are installed. Uninstalling an archetype never removes core blocks.
Block placement map (whole library)
studio-core-blocks/blocks/→ transitions, sfx, music, cta, anchor, sketch (19)archetype-explainer/blocks/→ hooks (5) + narration patterns (4) (9)archetype-product/blocks/→ beats (8)
Total = 36.
What ships with it
60 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.
- blocks/3d/anchor-plate/block.json 689 B
- blocks/3d/anchor-plate/render.py 2.7 KB runs code
- blocks/3d/audio-visualizer/block.json 785 B
- blocks/3d/audio-visualizer/render.py 2.6 KB runs code
- blocks/3d/kinetic-type/block.json 999 B
- blocks/3d/kinetic-type/render.py 3.2 KB runs code
- blocks/anchor/brand-pack/block.json 707 B
- blocks/anchor/brand-pack/gsap.min.js 71 KB runs code
- blocks/anchor/brand-pack/index.html 4.7 KB
- blocks/anchor/host-pack/block.json 652 B
- blocks/anchor/host-pack/gsap.min.js 71 KB runs code
- blocks/anchor/host-pack/index.html 4.4 KB
- blocks/anchor/location-pack/block.json 550 B
- blocks/anchor/location-pack/gsap.min.js 71 KB runs code
- blocks/anchor/location-pack/index.html 4.4 KB
- blocks/cta/link/block.json 575 B
- blocks/cta/link/gsap.min.js 71 KB runs code
- blocks/cta/link/index.html 4.5 KB
- blocks/cta/subscribe/block.json 694 B
- blocks/cta/subscribe/gsap.min.js 71 KB runs code
- blocks/cta/subscribe/index.html 4.5 KB
- blocks/cta/talk-to-us/block.json 600 B
- blocks/cta/talk-to-us/gsap.min.js 71 KB runs code
- blocks/cta/talk-to-us/index.html 4.5 KB
- blocks/music/calm-narrative/block.json 724 B
- blocks/music/calm-narrative/gsap.min.js 71 KB runs code
- blocks/music/calm-narrative/index.html 4.7 KB
- blocks/music/upbeat-tech/block.json 722 B
- blocks/music/upbeat-tech/gsap.min.js 71 KB runs code
- blocks/music/upbeat-tech/index.html 4.7 KB
- blocks/sfx/data-reveal/block.json 605 B
- blocks/sfx/data-reveal/gsap.min.js 71 KB runs code
- blocks/sfx/data-reveal/index.html 4.6 KB
- blocks/sfx/icon-pop/block.json 592 B
- blocks/sfx/icon-pop/gsap.min.js 71 KB runs code
- blocks/sfx/icon-pop/index.html 4.6 KB
- blocks/sfx/outro-resolve/block.json 611 B
- blocks/sfx/outro-resolve/gsap.min.js 71 KB runs code
- blocks/sfx/outro-resolve/index.html 4.6 KB
- blocks/sketch/flowchart/block.json 496 B
- blocks/sketch/flowchart/template.excalidraw 3.0 KB
- blocks/sketch/timeline/block.json 490 B
- blocks/sketch/timeline/template.excalidraw 3.6 KB
- blocks/sketch/wireframe/block.json 487 B
- blocks/sketch/wireframe/template.excalidraw 3.6 KB
- blocks/transition/cut/block.json 674 B
- blocks/transition/cut/gsap.min.js 71 KB runs code
- blocks/transition/cut/index.html 4.5 KB
- blocks/transition/fade/block.json 690 B
- blocks/transition/fade/gsap.min.js 71 KB runs code
- blocks/transition/fade/index.html 4.5 KB
- blocks/transition/J-cut/block.json 693 B
- blocks/transition/J-cut/gsap.min.js 71 KB runs code
- blocks/transition/J-cut/index.html 4.5 KB
- blocks/transition/L-cut/block.json 704 B
- blocks/transition/L-cut/gsap.min.js 71 KB runs code
- blocks/transition/L-cut/index.html 4.5 KB
- blocks/transition/smash-cut/block.json 703 B
- blocks/transition/smash-cut/gsap.min.js 71 KB runs code
- blocks/transition/smash-cut/index.html 4.5 KB
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 · 41 lines · 48 tokens per session scan A 05b2192a0287
studio-core-blocks is a skill published in the GitHub repository ikenga-hq/ikenga-pkgs (0 stars, last pushed yesterday), licensed Apache-2.0. It adds 48 tokens to every session and 552 once invoked, about $0.0002 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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