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 Dragoon0x/canon --skill canon-bundle-sizegit clone --depth 1 https://github.com/Dragoon0x/canonWrote 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/dragoon0x/canon/canon-bundle-size)<a href="https://agentmods.dev/skills/dragoon0x/canon/canon-bundle-size"><img src="https://agentmods.dev/badge/skills/dragoon0x/canon/canon-bundle-size/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/dragoon0x/canon/canon-bundle-size"><img src="https://agentmods.dev/badge/skills/dragoon0x/canon/canon-bundle-size.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 | $0.00064 | $0.00770 |
| Opus 5.5 | $0.00026 | $0.00308 |
| Sonnet 5.5 | $0.00013 | $0.00154 |
| Haiku 4.5 | $0.00006 | $0.00077 |
Grade A, and why
canon-bundle-size 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 2mo 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 — 82 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CANON · Bundle Size
Every kilobyte of JavaScript costs twice: once to download, once to parse and execute. CSS blocks render. Both have budgets.
Budgets
| Asset | Budget (gzipped) |
|---|---|
| Initial JS (critical path) | ≤ 200KB |
| Total JS (all routes) | ≤ 500KB |
| CSS (total) | ≤ 60KB |
| Total page weight (first load) | ≤ 1.5MB |
These are starting points. Rich apps (maps, editors) may exceed them with justification. Simple marketing pages should come in far under.
Strategies (ordered by impact)
- Don't ship what you don't use. Audit imports. Remove dead code. Tree shake.
- Replace heavy libraries with lighter alternatives. moment → date-fns. lodash → per-function imports or native. chart.js → uPlot.
- Code-split by route.
React.lazy()+Suspense, or dynamicimport(). Every route loads only its code. - Lazy-load below-the-fold components. Image galleries, comments, maps — load when the user scrolls near.
- Externalize large deps. CDN-hosted React/Vue/Angular with proper cache headers.
- Compress. Brotli > gzip. 15–20% smaller.
Measuring
# Webpack
npx webpack --profile --json > stats.json
npx webpack-bundle-analyzer stats.json
# Vite
npx vite build --report
# Per-package
npx bundlephobia <package-name>
Track sizes in CI. Alert on regressions.
Common heavy dependencies
| Package | Size (minified) | Alternative |
|---|---|---|
| moment | 300KB | date-fns (tree-shakeable), dayjs (2KB) |
| lodash (full) | 70KB | lodash-es (per-function), native |
| chart.js | 200KB | uPlot (35KB), lightweight D3 |
| Ant Design (full) | 1MB+ | Cherry-pick components |
| Three.js | 600KB | Only if you need 3D |
Anti-patterns
| Anti-pattern | Why it fails |
|---|---|
| Importing full lodash for one function | 70KB for _.debounce |
| No code splitting (single bundle) | Every route pays for every other route |
| Polyfilling for IE11 in 2026 | Dead weight for 99.9% of users |
| Source maps in production bundle | Inflates download (serve separately) |
| No tree shaking (CommonJS imports) | Dead code shipped |
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.
- 2mo ago First seen · 82 lines · 64 tokens per session scan A a639e412e829
canon-bundle-size is a skill published in the GitHub repository Dragoon0x/canon (6 stars, last pushed 6mo ago), licensed MIT. It adds 64 tokens to every session and 770 once invoked, about $0.0003 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 2026-08-31.
canon-bundle-size compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| canon-bundle-sizeDragoon0x/canon | Skill | 6 | 6mo ago | MIT | A | 64 | Claude Code, Codex |
| accessibilityericrisco/rsc-harness | Skill | 503 | 2d ago | MIT | A | 86 | Claude Code, Codex |
| accessibility-auditNickCrew/Claude-Cortex | Skill | 66 | 4mo ago | MIT | A | 31 | Claude Code, Codex |
| swiftui-layout-componentsdpearson2699/swift-ios-skills | Skill | 1.3k | 3mo ago | none | A | 101 | Claude Code |
| color-contrast-auditorcuriositech/windags-skills | Skill | 18 | 6d ago | none | A | 117 | Claude Code |
| accessibilitydiegosouzapw/awesome-omni-skills | Skill | 170 | 4mo ago | MIT | C | 119 | Claude Code, Codex |
| lagannOldiiik/Design-Lagann | Skill | 2 | 18d ago | none | A | 0 | Claude Code, Codex |