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/microsoft/vscode/chat-pet-sprite-creationnpx skills add microsoft/vscode --skill chat-pet-sprite-creationgit clone --depth 1 https://github.com/microsoft/vscodeWrote 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/microsoft/vscode/chat-pet-sprite-creation)<a href="https://agentmods.dev/skills/microsoft/vscode/chat-pet-sprite-creation"><img src="https://agentmods.dev/badge/skills/microsoft/vscode/chat-pet-sprite-creation.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 | $0.00053 | $0.04631 |
| Opus 5 | $0.00026 | $0.02315 |
| Sonnet 5 | $0.00011 | $0.00926 |
| Haiku 4.5 | $0.00005 | $0.00463 |
Grade A, and why
chat-pet-sprite-creation 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 4d 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 — 385 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Chat Pet Sprite Creation
Create pet sprites that feel like one continuous character rather than separate drawings. Start from the current pet body, preserve its visual anchor, and make every difference intentional.
Source of truth
- Sprite art:
src/vs/workbench/contrib/chat/browser/widget/media/chatPet/ - Runtime states, dimensions, timing, and transitions:
src/vs/workbench/contrib/chat/browser/widget/chatPetWidget.ts - Eye geometry, facing, clipping, and motion CSS:
src/vs/workbench/contrib/chat/browser/widget/media/chatPet.css - Unit tests:
src/vs/workbench/contrib/chat/test/browser/widget/chatPetWidget.test.ts
Read the current implementation before drawing. Existing dimensions and timings may have changed since this skill was written.
PR precedence and lineage
This skill distills the complete pet PR history. When rules conflict, use this precedence:
- Current code and tests
- The newest relevant open PR
- Newer merged PRs
- Older historical behavior
In particular, animation cleanup PR #330399 supersedes the old revive-sign flow and several earlier sprite/timing assumptions.
| PR | Durable learning |
|---|---|
| #327063 | The pet is one semantic button; sprite canvases, images, eyes, and effects are visual-only and aria-hidden. Resolve asset URLs through FileAccess. |
| #327412 | Model reactions as explicit states. Do not immediately repeat ordinary random reactions; sample rare transformations separately. |
| #327588 | Double-buffer sprite images and swap only after the pending image loads. Never blank the active sprite while a new source is loading. |
| #327696 | Stable/Insiders is a typed, persisted appearance choice. Keep variant naming and geometry systematic. |
| #327714 | Animated art is a horizontal sprite sheet plus a deliberate static reduced-motion PNG. Timing is runtime data, not image metadata. |
| #328334 | Persistent behavior such as “on the run” belongs in service state. Multi-phase animations advance from completion signals, not guessed delays. |
| #328480 | A drag release must not also trigger a click reaction. Gestures that share pointer events need explicit suppression/ownership. |
| #328530 | Waking consumes the interaction that woke the pet; it must not also trigger a random reaction. Reduced motion may skip the wake transition. |
| #329121 | Coalesce gaze updates, pause sprite timers while the document is hidden, and resume from elapsed time rather than replaying missed frames. |
| #329347 | Keep pixel-art pose changes in sprite frames and spatial motion in layout/CSS/physics. Complete falls from transition signals. |
| #329729 | Face the interaction before starting a reaction. Give each transient state an explicit lifetime and use real completion events for chained phases. |
| #329852 | Pointer and keyboard gestures need equivalent outcomes. Reduced motion preserves the state change while removing the travel animation. |
| #329867 | Attention animations are bounded; clapping stops after the confirmation-attention window even if the confirmation remains pending. |
| #330160 | Eyes are a composited runtime layer with tracking/blinking modes. Rapid facing changes can trigger a separate dizzy state. Wide art must respect live bounds. |
| #330275 | Physics uses the body footprint, bounded frame steps, and explicit impact moments. Recompute geometry when layout changes during flight. |
| #330399 | Latest animation contract: wide sleep/wake art, frame-aware blink composition, fixed-orientation decorations, and reverse despawn → forward respawn using one effect sheet. |
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.
- 4d ago First seen · 385 lines · 53 tokens per session scan A 6a446a77b9c6
chat-pet-sprite-creation is a skill published in the GitHub repository microsoft/vscode (190,808 stars, last pushed today), licensed MIT. It adds 53 tokens to every session and 4,631 once invoked, about $0.0003 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 2026-08-30.
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