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 dylantarre/animation-principles --skill problem-diagnosisgit clone --depth 1 https://github.com/dylantarre/animation-principlesWrote 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/dylantarre/animation-principles/problem-diagnosis)<a href="https://agentmods.dev/skills/dylantarre/animation-principles/problem-diagnosis"><img src="https://agentmods.dev/badge/skills/dylantarre/animation-principles/problem-diagnosis/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/dylantarre/animation-principles/problem-diagnosis"><img src="https://agentmods.dev/badge/skills/dylantarre/animation-principles/problem-diagnosis.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
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 | $0.00042 | $0.00919 |
| Opus 5.5 | $0.00017 | $0.00368 |
| Sonnet 5.5 | $0.00008 | $0.00184 |
| Haiku 4.5 | $0.00004 | $0.00092 |
Grade A, and why
problem-diagnosis 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 1mo 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 — 121 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Problem Diagnosis
Think like a doctor examining symptoms. Something feels wrong. Your job is to identify the specific principle being violated and prescribe the cure. Systematic diagnosis beats random fixes.
Core Mental Model
When animation feels off, ask: What principle is being violated, and how?
"It doesn't look right" isn't actionable. The 12 principles are your diagnostic checklist. Every animation problem is a principle problem—find which one, and the solution becomes clear.
Diagnostic Framework
Symptom: "Floaty" or "Weightless"
Likely Causes:
- Missing slow-in/slow-out (objects should accelerate with gravity)
- Insufficient anticipation before jumps
- No squash on landing impacts
- Timing too uniform (everything same speed)
- Missing secondary weight (hair/clothing not responding to gravity)
Fixes:
- Add ease-in at motion start
- Add squash frames at impact points
- Include settling oscillations after stops
- Vary timing based on mass
Symptom: "Stiff" or "Robotic"
Likely Causes:
- Missing arcs (linear interpolation instead of curves)
- No overlapping action (all parts move together)
- Twinning (left and right doing identical things)
- No secondary action
- Timing too uniform
Fixes:
- Add arc curves to all motion paths
- Offset timing of connected body parts
- Break symmetry in poses
- Add breathing and weight shifts
- Include micro-movements
Symptom: "Unclear" or "Hard to Read"
Likely Causes:
- Poor staging (elements overlap confusingly)
- Weak silhouettes
- Insufficient anticipation (action comes from nowhere)
- Not enough exaggeration
- Competing attention points
Fixes:
- Simplify background during key action
- Push poses to clear silhouettes
- Extend anticipation timing
- Increase exaggeration 20%
- Reduce secondary action during primary beats
Symptom: "Boring" or "Lifeless"
Likely Causes:
- No appeal in character posing
- Timing lacks contrast (no fast vs. slow)
- Missing anticipation-payoff structure
- Insufficient exaggeration
- No secondary action or texture
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.
- 1mo ago First seen · 121 lines · 42 tokens per session scan A 1f4ce5b44579
problem-diagnosis is a skill published in the GitHub repository dylantarre/animation-principles (117 stars, last pushed 9mo ago), licensed MIT. It adds 42 tokens to every session and 919 once invoked, about $0.0002 per session on Opus 5.5. 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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