feat: improve skill review scores for 5 skills

[rohan-tessl]

Hey @0xdeployer 👋

I ran your skills through tessl skill review at work and found some targeted improvements. Here's the full before/after:

Skill	Before	After	Change
bankr-client-patterns	16%	86%	+70%
bankr-error-handling	17%	90%	+73%
bankr-safety	17%	82%	+65%
sdk-balance-queries	17%	95%	+78%
bankr-token-trading	17%	89%	+72%

This PR covers 5 of your 39 skills to keep the contribution focused and reviewable — more can be improved in follow-ups or via automated review on future PRs.

Changes summary

All 5 skills:

• Fixed name frontmatter to use valid kebab-case format (was causing validation failures that blocked LLM judge scoring entirely)
• Removed version from frontmatter (flagged as unknown key — use metadata.version if needed)
• Rewrote description with explicit "Use when..." clause and concrete trigger terms for better skill selection
• Added structured ## Workflow sections for clearer step-by-step guidance

bankr-client-patterns (16% → 86%):

• Reduced from 509 lines to 189 lines — condensed verbose type definitions into a compact union type, tightened API function code, and compressed project scaffolding templates
• Preserved all essential types, functions, and usage patterns

bankr-error-handling (17% → 90%):

• Streamlined authentication resolution into a numbered list instead of separate code blocks per step
• Added explicit "do NOT retry" guidance directly in the workflow

bankr-safety (17% → 82%):

• Consolidated dedicated wallet section, merged recommended funding into a single line
• Converted pre-deployment checklist from bullets to numbered steps for clearer sequence

sdk-balance-queries (17% → 95%):

• Added explicit workflow steps (initialize client → call promptAndWait → parse response)
• Cleaned up prompt patterns section for scannability

bankr-token-trading (17% → 89%):

• Merged chain selection and slippage into concise paragraphs instead of bullet lists
• Added safety note about failed slippage transactions (no funds lost)

Want your remaining skills optimised too? 🚀

This PR covers 5 of your 39 skills to keep the contribution focused and reviewable. We have tooling that can go further:

• Optimize remaining 34 skills automatically (same AI-powered pass as above)
• Add a GitHub Action — tesslio/skill-review-and-optimize — that automatically reviews (and optionally optimizes) any SKILL.md changed in future PRs. Review mode works with zero secrets; maintainers can add TESSL_API_TOKEN for AI suggestions and the /apply-optimize comment flow.

Interested? Just tick the box below and we'll raise a follow-up PR:

• Yes please! Raise a follow-up PR: optimize the remaining 34 skills + add the Tessl skill-review-and-optimize GitHub Action
• No thanks — happy with the 5 skills in this PR

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Honest disclosure — I work at @tesslio where we build tooling around skills like these. Not a pitch - just saw room for improvement and wanted to contribute.

Want to self-improve your skills? Just point your agent (Claude Code, Codex, etc.) at this Tessl guide and ask it to optimize your skill. Ping me - @rohan-tessl - if you hit any snags.

Thanks in advance 🙏